Suspension cushion rigidity attenuation detection system, method and related device

Abstract

The invention discloses a suspension cushion rigidity attenuation detection system, a suspension cushion rigidity attenuation detection method and a related device, and relates to the field of rigidity detection.The system comprises a suspension cushion limiting structure, a collision detection circuit, a microprocessor and an engine controller, the suspension cushion limiting structure is arranged on the main frame and located on the outer edges of the upper side and the lower side of the suspension cushion, the collision detection circuit is connected with the suspension cushion limiting structure and the main frame, when the suspension cushion limiting structure makes contact with the main frame, the collision detection circuit is triggered to collect collision signals, and the microprocessor outputs the collision signals to the engine controller. And when the current driving condition of the vehicle is consistent with the calibrated driving condition of the vehicle and the collision signal exceeds a preset limit value, the engine controller judges that the rigidity of the suspension cushion is attenuated and gives an alarm. According to the invention, the real-time detection of the health state of the suspension cushion is realized, the rigidity attenuation condition of the suspension cushion can be found in time, the detection accuracy is improved, and the real-time performance is high.

Description

Technical Field

[0001] This invention relates to the field of stiffness testing technology, and more specifically, to a system, method, and related apparatus for detecting the stiffness attenuation of a suspended cushion. Background Technology

[0002] In the powertrain mounting system of rigid mining trucks, the mounting pads, as key elastic elements connecting the powertrain and the chassis, play a crucial role in optimizing the vehicle's NVH (Noise, Vibration, and Harshness) performance and ensuring system reliability through vibration reduction, limiting, protection, and balancing functions.

[0003] Over time, suspension pads experience stiffness reduction due to fatigue and aging, leading to a decline in overall vehicle NVH performance and reduced ride comfort. Traditional inspection methods rely primarily on periodic manual checks, but these methods have two major drawbacks: first, they depend on subjective judgment and lack quantitative indicators, resulting in low accuracy; second, the fixed inspection cycle cannot capture the stiffness reduction process in real time, leading to poor real-time performance. Summary of the Invention

[0004] In view of this, the present invention discloses a suspension pad stiffness attenuation detection system, method and related device to realize automatic detection of the health status of suspension pads, improve detection accuracy and have strong real-time performance.

[0005] A suspension pad stiffness attenuation detection system, comprising:

[0006] The suspension pad limiting structure 11 is arranged symmetrically and coaxially with the suspension pad 21, and the suspension pad limiting structure 11 is located on the upper and lower outer edges of the suspension pad 21.

[0007] The collision detection circuit 12 has a first input terminal connected to the suspension pad limiting structure 11 and a second input terminal connected to the main frame 22. A collision distance is reserved between the suspension pad limiting structure 11 and the main frame 22.

[0008] The microprocessor 13 has its input terminal connected to the output terminal of the collision detection circuit 12, and is used to acquire the collision signal triggered by the collision detection circuit 12 when the suspension pad limiting structure 11 comes into contact with the main frame 22 within a preset time period.

[0009] An engine controller 14, connected to the output of the microprocessor 13, is used to acquire the collision signal collected by the collision detection circuit 12 when it is determined that the current driving condition of the vehicle is consistent with the vehicle's calibrated driving condition. If the collision signal exceeds a preset limit, it is determined that the suspension pad 21 has experienced stiffness attenuation, and an alarm message is output. The vehicle's calibrated driving condition is the driving condition corresponding to when the suspension pad 21 reaches its maximum displacement calibration value.

[0010] Optionally, the collision detection circuit 12 includes: a first branch circuit and a second branch circuit;

[0011] The first input terminal of the first branch circuit is connected to the suspension pad limiting structure 11 located on the upper outer edge of the suspension pad 21, and the second input terminal is connected to the main frame 22.

[0012] The first input terminal of the second branch circuit is connected to the suspension pad limiting structure 11 located on the lower outer edge of the suspension pad 21, and the second input terminal is connected to the main frame 22.

[0013] The input terminal of the microprocessor 13 is connected to the output terminal of the first branch circuit and the output terminal of the second branch circuit, respectively, and is used to acquire the first collision signal collected by the first branch circuit and / or the second collision signal collected by the second branch circuit when the suspension pad limiting structure 11 comes into contact with the main frame 22 within a preset time period. The collision signal collected by the collision detection circuit 12 includes the first collision signal and / or the second collision signal.

[0014] Optionally, it also includes: a first collision return spring and a second collision return spring;

[0015] The first collision return spring is coaxially arranged with the suspension pad limiting structure 11 located on the upper outer edge of the suspension pad 21, and the two are mechanically connected. At the same time, the first collision return spring is connected to the first input terminal of the first branch circuit.

[0016] The first collision return spring is used to absorb impact energy through elastic deformation when the suspension pad limiting structure 11 comes into contact with the main frame 22, providing buffer protection for the suspension pad 21, and triggering the first branch circuit to collect the first collision signal.

[0017] The second collision return spring is coaxially arranged with the suspension pad limiting structure 11 located on the lower outer edge of the suspension pad 21, and the two are mechanically connected. At the same time, the second collision return spring is connected to the first input terminal of the second branch circuit.

[0018] The second collision return spring is used to absorb impact energy through elastic deformation when the suspension pad limiting structure 11 comes into contact with the main frame 22, providing buffer protection for the suspension pad 21, and triggering the second branch circuit to collect the second collision signal.

[0019] Optionally, the engine controller 14 is further configured to:

[0020] Obtain the current actual operating load of the vehicle and the current cumulative usage time of the suspension pads;

[0021] The target maximum stiffness attenuation value corresponding to the current actual vehicle operating load and the current cumulative use time of the suspension pad is determined from the pre-calibrated correspondence between the actual vehicle operating load, the cumulative use time of the suspension pad, and the maximum allowable stiffness attenuation value of the suspension pad.

[0022] With the load-bearing capacity of the powertrain mounting system remaining constant, the maximum allowable displacement limit of the mounting pad is determined based on the target maximum stiffness attenuation value and the load-bearing capacity.

[0023] The maximum displacement limit of the suspension pad is determined as the collision distance reserved between the suspension pad limiting structure 11 and the main frame 22.

[0024] A method for detecting the stiffness attenuation of a suspension pad, applied to the engine controller 14 in the aforementioned stiffness attenuation detection system, the method comprising:

[0025] Obtain the current driving status of the vehicle;

[0026] When the current driving condition of the vehicle is consistent with the vehicle's calibrated driving condition, the collision signal collected by the collision detection circuit 12 is obtained when the suspension pad limit structure 11 comes into contact with the main frame 22 within a preset time period. The vehicle's calibrated driving condition is the vehicle driving condition corresponding to when the suspension pad 21 reaches the maximum displacement calibration value.

[0027] If the collision signal exceeds the preset limit, it is determined that the stiffness of the suspension pad 21 has decreased, and an alarm message is output.

[0028] Optionally, if the collision signal exceeds a preset limit, it is determined that the suspension pad 21 has experienced stiffness attenuation, and an alarm message is output, including:

[0029] When the number of collisions within the preset time period exceeds the preset collision limit, it is determined that the stiffness of the suspended soft pad 21 has decreased, and an alarm message is output.

[0030] The collision signal includes the number of collisions, and the preset limit includes the preset number of collisions limit.

[0031] Optionally, if the collision signal exceeds a preset limit, it is determined that the suspension pad 21 has experienced stiffness attenuation, and an alarm message is output, including:

[0032] When the cumulative collision contact time within the preset time period exceeds the preset collision contact time limit, it is determined that the stiffness of the suspended soft pad 21 has decreased, and an alarm prompt message is output.

[0033] The collision signal includes the collision contact time, and the preset limit includes the preset collision contact time limit.

[0034] A suspension pad stiffness attenuation detection device is applied to the engine controller 14 in the aforementioned suspension pad stiffness attenuation detection system. The suspension pad stiffness attenuation detection device includes:

[0035] Driving condition acquisition unit, used to acquire the current driving condition of the vehicle;

[0036] The collision signal acquisition unit is used to acquire the collision signal collected by the collision detection circuit 12 when the suspension pad limit structure 11 comes into contact with the main frame 22 within a preset time period when the current driving condition of the vehicle is consistent with the vehicle calibration driving condition. The vehicle calibration driving condition is the vehicle driving condition corresponding to when the suspension pad 21 reaches the maximum displacement calibration value.

[0037] The stiffness attenuation determination unit is used to determine that the suspension pad 21 has experienced stiffness attenuation if the collision signal exceeds a preset limit, and to output an alarm message.

[0038] A computer storage medium storing at least one instruction, which, when executed by a processor, implements the above-described method for detecting the stiffness attenuation of a suspension pad.

[0039] An engine controller, the engine controller comprising: a memory and a processor;

[0040] The memory is used to store at least one instruction;

[0041] The processor is used to execute at least one instruction to implement the suspension pad stiffness attenuation detection method described above.

[0042] As can be seen from the above technical solution, the present invention discloses a suspension pad stiffness attenuation detection system, method and related device. The system includes a suspension pad limiting structure, a collision detection circuit, a microprocessor and an engine controller. The suspension pad limiting structure and the suspension pad are arranged symmetrically and coaxially, and the suspension pad limiting structure is located on the upper and lower outer edges of the suspension pad. The first input terminal of the collision detection circuit is connected to the suspension pad limiting structure, and the second input terminal is connected to the main frame. A collision distance is reserved between the suspension pad limiting structure and the main frame. When the suspension pad limiting structure contacts the main frame, the collision detection circuit is triggered to collect a collision signal. The microprocessor will output the collision signal collected by the collision detection circuit within a preset time period to the engine controller. When the engine controller determines that the current driving condition of the vehicle is consistent with the vehicle's calibrated driving condition, it compares the collision signal collected by the collision detection circuit with a preset limit. When the collision signal exceeds the preset limit, it determines that the suspension pad has experienced stiffness attenuation and outputs an alarm message. This invention enables real-time monitoring of the health status of suspension pads. When the suspension pad limiting structure comes into contact with the main frame, a collision detection circuit is triggered to collect a collision signal. By comparing the collected collision signal with a preset limit, the stiffness reduction of the suspension pads due to fatigue aging can be accurately determined and detected in a timely manner. Compared with manual periodic inspections, this invention significantly improves the detection accuracy and has strong real-time performance. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the published drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of the structure of a suspension pad stiffness attenuation detection system disclosed in an embodiment of the present invention;

[0045] Figure 2 This is a schematic diagram of another suspension pad stiffness attenuation detection system disclosed in an embodiment of the present invention;

[0046] Figure 3 This is a flowchart of a method for detecting the stiffness attenuation of a suspended cushion disclosed in an embodiment of the present invention;

[0047] Figure 4 This is a schematic diagram of the structure of a suspension pad stiffness attenuation detection device disclosed in an embodiment of the present invention;

[0048] Figure 5 This is a schematic diagram of the structure of an engine controller disclosed in an embodiment of the present invention. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] This invention discloses a suspension pad stiffness attenuation detection system, method, and related apparatus to achieve real-time detection of the health status of the suspension pads. When the suspension pad limiting structure comes into contact with the main frame, a collision detection circuit is triggered to collect a collision signal. By comparing the collected collision signal with a preset limit value, the stiffness attenuation of the suspension pad due to fatigue aging can be accurately determined and detected in a timely manner. Compared with manual periodic inspections, this invention significantly improves the detection accuracy and has strong real-time performance.

[0051] See Figure 1 The present invention discloses a structural schematic diagram of a suspension pad stiffness attenuation detection system. The stiffness attenuation detection system includes: a suspension pad limiting structure 11, a collision detection circuit 12, a microprocessor 13, and an engine controller 14.

[0052] in:

[0053] The suspension pad limiting structure 11 and the suspension pad 21 are arranged symmetrically and coaxially, and the suspension pad limiting structure 11 is located on the upper and lower outer edges of the suspension pad 21.

[0054] The upper and lower outer edges of the suspension pad 21 include the upper outer edge and the lower outer edge of the suspension pad 21.

[0055] Collision detection circuit 12 ( Figure 1 The first input terminal (shown in part) is connected to the suspension pad limiting structure 11, and the second input terminal is connected to the main frame 22. A collision distance is reserved between the suspension pad limiting structure 11 and the main frame 22.

[0056] By reserving a collision distance between the suspension pad limiting structure 11 and the main frame 22, it is ensured that under normal circumstances, the suspension pad limiting structure 11 and the main frame 22 do not contact each other, and at this time, the collision detection circuit 12 cannot detect an electrical signal.

[0057] When the external load changes or the stiffness of the suspension pad 21 decreases, the suspension pad limiting structure 11 will move towards the main frame 22 and come into contact with the main frame 22. At this time, the collision detection circuit 12 is triggered to detect an electrical signal, which is the collision signal that the collision detection circuit 12 needs to collect.

[0058] The input terminal of the microprocessor 13 is connected to the output terminal of the collision detection circuit 12, and is used to acquire the collision signal triggered by the collision detection circuit 12 when the suspension pad limiting structure 11 comes into contact with the main frame 22 within a preset time period.

[0059] The value of the preset time period is determined according to actual needs, and this invention does not limit it.

[0060] In practical applications, the collision detection circuit 12 can be a mechanical switch. When the suspension pad limiting structure 11 comes into contact with the main frame 22, the mechanical force pushes the internal contacts of the switch to close or open, thereby changing the circuit state.

[0061] The collision detection circuit 12 can also be a resistive sensor, such as a piezoresistor. The resistance of a piezoresistor changes with the contact pressure; the greater the pressure, the lower the resistance. When the suspension pad limiting structure 11 comes into contact with the main frame 22, the resistance decreases, thereby triggering the collision detection circuit 12 to detect a collision signal.

[0062] The collision detection circuit 12 can also be an inductive sensor, which detects the approach of a metallic object through electromagnetic induction. When the suspension pad limiting structure 11 (made of metal) contacts the sensor on the main frame 22, the amplitude of the oscillation circuit inside the sensor is attenuated, thereby triggering the collision detection circuit 12 to collect a collision signal.

[0063] The collision detection circuit 12 includes, but is not limited to, mechanical switches, resistive sensors, and inductive sensors, depending on actual needs. This invention does not limit the specific type of sensor.

[0064] The engine controller 14 is connected to the output of the microprocessor 13. When it is determined that the current driving condition of the vehicle is consistent with the calibrated driving condition of the vehicle, the collision signal collected by the collision detection circuit 12 is obtained. If the collision signal exceeds the preset limit, it is determined that the stiffness of the suspension pad 21 has decreased, and an alarm message is output.

[0065] The stiffness attenuation mentioned in this application includes, but is not limited to, fatigue stiffness attenuation.

[0066] In practical applications, the microprocessor 13 acquires the collision signal collected by the collision detection circuit 12 in real time and transmits the collision signal to the engine controller 14 through the CAN (Controller Area Network) bus.

[0067] The engine controller 14 has pre-stored the vehicle calibration driving conditions, which are the vehicle driving conditions corresponding to when the suspension pad 21 reaches the maximum displacement calibration value.

[0068] The process for determining the vehicle's calibrated operating conditions is as follows:

[0069] During the operation of the rigid mining truck within the mining area, vehicle operation data is collected. Specifically, displacement sensors installed on the powertrain mounting system collect the maximum displacement calibration value when the suspension pad 21 is compressed. Simultaneously, the vehicle driving conditions corresponding to the occurrence of this maximum displacement calibration value are recorded and used as the vehicle's calibrated driving conditions. These conditions include parameters such as vehicle speed, engine speed, engine torque, and road slope.

[0070] The road surface slope is obtained by a triaxial acceleration sensor installed on the powertrain mounting system. The specific process for determining the road surface slope can be found in existing mature solutions, and will not be elaborated here.

[0071] The engine controller 14 acquires real-time data on the vehicle's current driving conditions, including vehicle speed, engine speed, engine torque, and road gradient, and compares these data with the vehicle's calibrated driving conditions. When the current driving conditions match the calibrated conditions, the engine controller 14 acquires the collision signal collected by the collision detection circuit 12 and compares the collision signal (which includes the number of collisions and the collision contact time between the suspension cushion limiting structure 11 and the main frame 22) with corresponding preset limits. If the detected collision signal exceeds the preset limit, it is determined that the suspension cushion 21 has experienced stiffness attenuation. At this time, the engine controller 14 outputs an alarm message to remind the driver to check and replace the suspension cushion 21.

[0072] In summary, this invention discloses a suspension pad stiffness attenuation detection system, including a suspension pad limiting structure 11, a collision detection circuit 12, a microprocessor 13, and an engine controller 14. The suspension pad limiting structure 11 and the suspension pad 21 are arranged symmetrically and coaxially, and the suspension pad limiting structure 11 is located on the upper and lower outer edges of the suspension pad 21. The first input terminal of the collision detection circuit 12 is connected to the suspension pad limiting structure 11, and the second input terminal is connected to the main frame 22. A space is reserved between the suspension pad limiting structure 11 and the main frame 22. When the suspension pad limiting structure 11 contacts the main frame 22, the collision detection circuit 12 is triggered to collect a collision signal. The microprocessor 13 outputs the collision signals collected by the collision detection circuit 12 within a preset time period to the engine controller 14. When the engine controller 14 determines that the current driving condition of the vehicle is consistent with the vehicle's calibrated driving condition, it compares the collision signal collected by the collision detection circuit 12 with a preset limit. If the collision signal exceeds the preset limit, it determines that the suspension pad 21 has experienced stiffness attenuation and outputs an alarm message. This invention achieves real-time detection of the health status of the suspension pad 21. When the suspension pad limiting structure 11 contacts the main frame 22, the collision detection circuit 12 is triggered to collect a collision signal. By comparing the collected collision signal with a preset limit, the stiffness attenuation of the suspension pad 21 due to fatigue aging can be accurately determined and detected in a timely manner. Compared with manual periodic inspections, this invention greatly improves the detection accuracy and has strong real-time performance.

[0073] In one embodiment, the collision detection circuit 12 includes a first branch circuit and a second branch circuit.

[0074] The first input terminal of the first branch circuit is connected to the suspension pad limiting structure 11 located on the upper outer edge of the suspension pad 21, and the second input terminal is connected to the main frame 22.

[0075] When the suspension pad limiting structure 11 connected to the first branch circuit comes into contact with the main frame 22, the first branch circuit will be triggered to collect a collision signal, which is recorded as the first collision signal.

[0076] The first input terminal of the second branch circuit is connected to the suspension pad limiting structure 11 located on the lower outer edge of the suspension pad 21, and the second input terminal is connected to the main frame 22.

[0077] When the suspension pad limiting structure 11 connected to the second branch circuit comes into contact with the main frame 22, the second branch circuit will be triggered to collect a collision signal, which is recorded as the second collision signal.

[0078] The input terminal of the microprocessor 13 is connected to the output terminal of the collision detection circuit 12. Specifically, the input terminal of the microprocessor 13 is connected to the output terminal of the first branch circuit and the output terminal of the second branch circuit, respectively. The microprocessor 13 is used to acquire the first collision signal collected by the first branch circuit and / or the second collision signal collected by the second branch circuit when the suspension pad limiting structure 11 comes into contact with the main frame 22 within a preset time period.

[0079] Specifically, when the suspension pad limiting structure 11 connected only to the first branch circuit and the main frame 22 come into contact, the collision signal collected by the collision detection circuit 12 includes: the first collision signal collected by the first branch circuit.

[0080] When the suspension pad limiting structure 11 connected only by the second branch circuit and the main frame 22 come into contact, the collision signal collected by the collision detection circuit 12 includes: the second collision signal collected by the second branch circuit.

[0081] When the suspension pad limiting structure 11 connected to the first branch circuit and the main frame 22 come into contact, and at the same time, the suspension pad limiting structure 11 connected to the second branch circuit and the main frame 22 come into contact, the collision signals collected by the collision detection circuit 12 include: a first collision signal and a second collision signal.

[0082] In practical applications, the first and second collision signals can carry identification information of the corresponding branch circuits. In this way, after the microprocessor 13 collects the collision signals, it can accurately determine whether the suspension pad limiting structure 11 and the main frame 22 that made contact are connected to the first branch circuit or the second branch circuit based on this identification information, thereby facilitating the rapid location of the suspension pad 21 where stiffness decay has occurred.

[0083] In one embodiment, see Figure 2 A schematic diagram of another suspension pad stiffness attenuation detection system disclosed in this embodiment of the invention is shown. Figure 1 Based on the embodiment shown, the stiffness attenuation detection system may further include: a collision return spring 15.

[0084] The collision return spring 15 is coaxially arranged with the suspension pad limiting structure 11 and the two are mechanically connected. At the same time, the collision return spring 15 is connected to the first input terminal of the collision detection circuit 12. When the suspension pad limiting structure 11 and the main frame 22 come into contact, the spring absorbs the impact energy through elastic deformation, provides buffer protection for the suspension pad 21, prevents the suspension pad 21 from failing due to the collision, and triggers the collision detection circuit 12 to collect the collision signal.

[0085] For ease of discussion, in this embodiment, the collision return spring 15 located on the upper outer edge of the suspension pad 21 is referred to as the first collision return spring, and the collision return spring 15 located on the lower outer edge of the suspension pad 21 is referred to as the second collision return spring.

[0086] Specifically as follows:

[0087] The first collision return spring is coaxially arranged with the suspension pad limiting structure 11 located on the upper outer edge of the suspension pad 21, and the two are mechanically connected. At the same time, the first collision return spring is connected to the first input terminal of the first branch circuit.

[0088] The first collision return spring is used to absorb impact energy through elastic deformation when the suspension pad limiting structure 11 comes into contact with the main frame 22, providing buffer protection for the suspension pad 21, and triggering the first branch circuit to collect the first collision signal.

[0089] The second collision return spring is coaxially arranged with the suspension pad limiting structure located on the lower outer edge of the suspension pad 21, and the two are mechanically connected. At the same time, the second collision return spring is connected to the first input terminal of the second branch circuit.

[0090] The second collision return spring is used to absorb impact energy through elastic deformation when the suspension pad limiting structure 11 comes into contact with the main frame 22, providing buffer protection for the suspension pad 21, and triggering the second branch circuit to collect the second collision signal.

[0091] In this embodiment, a collision return spring 15 is provided at the contact position between the suspension pad limiting structure 11 and the main frame 22. When the suspension pad limiting structure 11 comes into contact with the main frame 22, the collision return spring 15 can absorb the impact energy through elastic deformation, thereby providing buffer protection for the suspension pad 21 and preventing the suspension pad 21 from failing due to the collision.

[0092] In one embodiment, the engine controller 14 can also be used for:

[0093] (1) Obtain the current actual operating load of the vehicle and the current cumulative usage time of the suspension pad.

[0094] The current cumulative usage time of the suspension pad refers to the total usage time accumulated from the initial use of the suspension pad 21 to the present moment.

[0095] (2) Determine the target maximum stiffness attenuation value corresponding to the current actual vehicle operating load and the current cumulative use time of the suspension pad from the pre-calibrated correspondence between the actual vehicle operating load, the cumulative use time of the suspension pad, and the maximum allowable stiffness attenuation value of the suspension pad 21.

[0096] The correspondence between the pre-calibrated actual vehicle operating load, the cumulative usage time of the suspension pad, and the maximum allowable stiffness attenuation value of the suspension pad can be seen in the example shown in Table 1.

[0097] Table 1

[0098]

[0099] The actual load in Table 1 refers to the actual operating load of the vehicle, which is also the average vibration acceleration of the mining truck engine powertrain; the usage time refers to the cumulative usage time of the suspension pads; and the stiffness attenuation value refers to the maximum allowable stiffness attenuation value of the suspension pads 21.

[0100] Table 1 shows the maximum allowable stiffness attenuation value of the suspension pad 21 based on the MAP diagram of the vehicle's actual operating load and the cumulative usage time of the suspension pad.

[0101] For example, the actual operating load of the mining truck is 2G acceleration, and the current cumulative usage time of the suspension pad is 1000h. According to Table 1, the maximum allowable stiffness attenuation value of the suspension pad 21 is 2%.

[0102] For example, the actual operating load of the mining truck is 3G acceleration, and the current cumulative usage time of the suspension pad is 1000h. According to Table 1, the maximum allowable stiffness attenuation value of the suspension pad 21 is 3%.

[0103] (3) Under the condition that the load-bearing capacity of the powertrain mounting system remains unchanged, determine the maximum allowable displacement limit of the mounting pad based on the target maximum stiffness attenuation value and the load-bearing capacity.

[0104] The maximum displacement limit of the suspension pad is determined according to the following formula:

[0105] F = S × K;

[0106] In the formula, F represents the load-bearing capacity of the powertrain mounting system, K represents the maximum allowable stiffness attenuation value of the mounting pad 21, and S represents the maximum displacement limit of the mounting pad.

[0107] The load-bearing capacity of the powertrain mounting system is usually fixed. By substituting the determined target maximum stiffness attenuation value into the above formula, the maximum displacement limit of the mounting pad can be obtained.

[0108] (4) The maximum displacement limit of the suspension pad is determined as the collision distance reserved between the suspension pad limiting structure 11 and the main frame 22.

[0109] This application uses the determined maximum displacement limit of the suspension pad as the reserved collision distance between the suspension pad limiting structure 11 and the main frame 22. In practical applications, the suspension pad limiting structure 11 needs to be installed on the suspension pad 21 according to this collision distance. After the suspension pad limiting structure 11 is installed, a collision detection circuit 12 is installed on the suspension pad limiting structure 11. Specifically, the first input terminal of the collision detection circuit 12 is connected to the suspension pad limiting structure 11, and the second input terminal is connected to the main frame 22. Then, the output terminal of the collision detection circuit 12 is connected to the input terminal of the microprocessor 13, and the microprocessor 13 transmits the collision signal collected by the collision detection circuit 12 to the engine controller 14, thereby completing the overall installation of the suspension pad stiffness attenuation detection system.

[0110] Corresponding to the above embodiments, the present invention also discloses a method for detecting the stiffness attenuation of a suspended cushion.

[0111] See Figure 3 The present invention discloses a flowchart of a method for detecting the stiffness attenuation of a suspension pad, which is applied to the engine controller shown in the above embodiment. The method includes the following steps:

[0112] Step S101: Obtain the current driving conditions of the vehicle.

[0113] The vehicle's current operating conditions include parameters such as vehicle speed, engine speed, engine torque, and road slope.

[0114] Step S102: When the current driving condition of the vehicle is consistent with the calibrated driving condition of the vehicle, acquire the collision signal triggered by the collision detection circuit when the suspension pad limiting structure comes into contact with the main frame within a preset time period.

[0115] The vehicle calibration driving condition is defined as the vehicle driving condition corresponding to the maximum displacement calibration value of the suspension pad.

[0116] The process for determining the vehicle's calibrated operating conditions is as follows:

[0117] During operation within the mining area, the rigid mining truck collects overall vehicle operating data. Specifically, displacement sensors installed on the powertrain mounting system collect the maximum displacement calibration value when the suspension pad 21 is compressed. Simultaneously, the vehicle driving conditions corresponding to the occurrence of this maximum displacement calibration value are recorded and used as the vehicle's calibrated driving conditions. These conditions include parameters such as vehicle speed, engine speed, engine torque, and road slope.

[0118] Step S103: If the collision signal exceeds the preset limit, it is determined that the stiffness of the suspension pad has decreased, and an alarm message is output.

[0119] The engine controller acquires real-time data on the vehicle's current operating conditions, including vehicle speed, engine speed, engine torque, and road gradient, and compares these data with the vehicle's calibrated operating conditions. When the current operating conditions match the calibrated conditions, the engine controller receives collision signals from the collision detection circuit and compares these signals (which include the number of collisions between the suspension cushion limiting structure and the main frame, and the cumulative collision contact time) with corresponding preset limits. If the detected collision signal exceeds the preset limit, it is determined that the suspension cushion has experienced stiffness degradation. At this point, the engine controller outputs an alarm message, reminding the driver to check and replace the suspension cushion.

[0120] In summary, this invention discloses a method for detecting the stiffness decay of suspension pads. The engine controller acquires the current driving conditions of the vehicle, and when the current driving conditions match the calibrated driving conditions, it acquires the collision signal triggered by the collision detection circuit when the suspension pad limiting structure contacts the main frame within a preset time period. If the collision signal exceeds a preset limit, it determines that the suspension pad has experienced stiffness decay and outputs an alarm message. This invention achieves real-time detection of the health status of the suspension pads. When the suspension pad limiting structure contacts the main frame, it triggers the collision detection circuit to acquire a collision signal. By comparing the acquired collision signal with a preset limit, it accurately determines and promptly detects the stiffness decay of the suspension pads due to fatigue aging. Compared with manual periodic inspections, this invention significantly improves detection accuracy and has strong real-time performance.

[0121] In practical applications, collision signals include the number of collisions and the collision contact time.

[0122] In one embodiment, step S103 may specifically include:

[0123] When the number of collisions within a preset time period exceeds a preset collision limit, it is determined that the stiffness of the suspended pad has decreased, and an alarm message is output.

[0124] When the collision signal includes the number of collisions, the corresponding preset limit includes: preset collision number limit.

[0125] Under the vehicle's calibrated driving conditions corresponding to when the suspension pad reaches its maximum displacement calibration value, if the number of collisions acquired by the collision detection circuit within a preset time period exceeds the preset collision limit, it is determined that the suspension pad has experienced stiffness attenuation. An alarm message is then output to prompt the driver to check and replace the suspension pad.

[0126] In one embodiment, step S103 may specifically include:

[0127] When the cumulative collision contact time within a preset time period exceeds the preset collision contact time limit, it is determined that the stiffness of the suspended soft pad has decreased, and an alarm prompt message is output.

[0128] When the collision signal includes the collision contact time, the corresponding preset limit includes: preset collision contact time limit.

[0129] Under the vehicle's calibrated driving conditions corresponding to when the suspension pad reaches its maximum displacement calibration value, if the cumulative collision contact time obtained by the collision detection circuit within a preset time period exceeds the preset collision contact time limit, it is determined that the suspension pad has experienced stiffness attenuation, and an alarm message is output to prompt the driver to check and replace the suspension pad.

[0130] In practical applications, if either the number of collisions or the cumulative collision contact time exceeds the corresponding preset limit, it is determined that the stiffness of the suspension pad has decreased, and an alarm message is output.

[0131] Corresponding to the above method embodiments, the present invention also discloses a device for detecting the stiffness attenuation of a suspended cushion.

[0132] See Figure 4 The present invention discloses a schematic diagram of a suspension pad stiffness attenuation detection device. This device is applied to the engine controller shown in the above embodiment and includes:

[0133] The driving condition acquisition unit 201 is used to acquire the current driving condition of the vehicle.

[0134] The vehicle's current operating conditions include parameters such as vehicle speed, engine speed, engine torque, and road slope.

[0135] The collision signal acquisition unit 202 is used to acquire the collision signal triggered by the collision detection circuit when the suspension pad limiting structure comes into contact with the main frame within a preset time period, when the current driving condition of the vehicle is consistent with the vehicle's calibrated driving condition.

[0136] The vehicle calibration driving condition is defined as the vehicle driving condition corresponding to the maximum displacement calibration value of the suspension pad.

[0137] The process for determining the vehicle's calibrated operating conditions is as follows:

[0138] During operation within the mining area, the rigid mining truck collects overall vehicle operating data. Specifically, displacement sensors installed on the powertrain mounting system collect the maximum displacement calibration value when the suspension pad 21 is compressed. Simultaneously, the vehicle driving conditions corresponding to the occurrence of this maximum displacement calibration value are recorded and used as the vehicle's calibrated driving conditions. These conditions include parameters such as vehicle speed, engine speed, engine torque, and road slope.

[0139] The stiffness attenuation determination unit 203 is used to determine that the suspension pad has experienced stiffness attenuation if the collision signal exceeds a preset limit, and to output an alarm message.

[0140] The engine controller acquires real-time data on the vehicle's current operating conditions, including vehicle speed, engine speed, engine torque, and road gradient, and compares these data with the vehicle's calibrated operating conditions. When the current operating conditions match the calibrated conditions, the engine controller receives collision signals from the collision detection circuit and compares these signals (which include the number of collisions between the suspension cushion limiting structure and the main frame, and the cumulative collision contact time) with corresponding preset limits. If the detected collision signal exceeds the preset limit, it is determined that the suspension cushion has experienced stiffness degradation. At this point, the engine controller outputs an alarm message, reminding the driver to check and replace the suspension cushion.

[0141] In summary, this invention discloses a suspension pad stiffness attenuation detection device. The engine controller acquires the vehicle's current driving conditions, and when these conditions match the vehicle's calibrated driving conditions, it acquires a collision signal triggered by a collision detection circuit within a preset time period when the suspension pad limiting structure contacts the main frame. If the collision signal exceeds a preset limit, it determines that the suspension pad has experienced stiffness attenuation and outputs an alarm message. This invention achieves real-time detection of the suspension pad's health status. When the suspension pad limiting structure contacts the main frame, it triggers the collision detection circuit to acquire a collision signal. By comparing the acquired collision signal with a preset limit, it accurately determines and promptly detects stiffness attenuation caused by fatigue aging of the suspension pad. Compared to manual periodic inspections, this invention significantly improves detection accuracy and possesses strong real-time performance.

[0142] In practical applications, collision signals include the number of collisions and the collision contact time.

[0143] In one embodiment, the stiffness attenuation determination unit 203 can be specifically used for:

[0144] When the number of collisions within a preset time period exceeds a preset collision limit, it is determined that the stiffness of the suspended pad has decreased, and an alarm message is output.

[0145] When the collision signal includes the number of collisions, the corresponding preset limit includes: preset collision number limit.

[0146] Under the vehicle's calibrated driving conditions corresponding to when the suspension pad reaches its maximum displacement calibration value, if the number of collisions acquired by the collision detection circuit within a preset time period exceeds the preset collision limit, it is determined that the suspension pad has experienced stiffness attenuation. An alarm message is then output to prompt the driver to check and replace the suspension pad.

[0147] In one embodiment, the stiffness attenuation determination unit 203 can also be used for:

[0148] When the cumulative collision contact time within a preset time period exceeds the preset collision contact time limit, it is determined that the stiffness of the suspended soft pad has decreased, and an alarm prompt message is output.

[0149] When the collision signal includes the collision contact time, the corresponding preset limit includes: preset collision contact time limit.

[0150] Under the vehicle's calibrated driving conditions corresponding to when the suspension pad reaches its maximum displacement calibration value, if the cumulative collision contact time obtained by the collision detection circuit within a preset time period exceeds the preset collision contact time limit, it is determined that the suspension pad has experienced stiffness attenuation, and an alarm message is output to prompt the driver to check and replace the suspension pad.

[0151] In practical applications, if either the number of collisions or the cumulative collision contact time exceeds the corresponding preset limit, it is determined that the stiffness of the suspension pad has decreased, and an alarm message is output.

[0152] Corresponding to the above embodiments, the present invention also discloses a computer storage medium that stores at least one instruction, which, when executed by a processor, implements the steps shown in the embodiments of the suspension pad stiffness attenuation detection method.

[0153] Computer storage media can be tangible media that may contain or store programs for use by or in conjunction with an instruction execution system, apparatus, or device. Computer storage media can be machine-readable signal media or machine-readable storage media. Computer storage media can be, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0154] Corresponding to the above embodiments, such as Figure 5 As shown, the present invention also provides a schematic diagram of the structure of an engine controller, which may include: a processor 1 and a memory 2;

[0155] The processor 1 and memory 2 communicate with each other via communication bus 3.

[0156] Processor 1, for executing at least one instruction;

[0157] Memory 2 is used to store at least one instruction;

[0158] Processor 1 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention.

[0159] Memory 2 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0160] In this embodiment, the processor executes at least one instruction to implement the steps shown in the method for detecting the stiffness attenuation of a suspension pad.

[0161] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0162] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0163] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A suspension pad stiffness attenuation detection system, characterized in that, include: The suspension pad limiting structure (11) is arranged symmetrically and coaxially with the suspension pad (21), and the suspension pad limiting structure (11) is located on the outer edges of the upper and lower sides of the suspension pad (21). The collision detection circuit (12) has a first input terminal connected to the suspension pad limiting structure (11) and a second input terminal connected to the main frame (22). A collision distance is reserved between the suspension pad limiting structure (11) and the main frame (22). Microprocessor (13), the input terminal of which is connected to the output terminal of the collision detection circuit (12), is used to acquire the collision signal triggered by the collision detection circuit (12) when the suspension pad limiting structure (11) comes into contact with the main frame (22) within a preset time period; An engine controller (14) is connected to the output of the microprocessor (13) and is used to acquire the collision signal collected by the collision detection circuit (12) when the current driving condition of the vehicle is consistent with the vehicle calibration driving condition. If the collision signal exceeds a preset limit, the stiffness of the suspension pad (21) is determined to be attenuated, and an alarm message is output. The vehicle calibration driving condition is the vehicle driving condition corresponding to the maximum displacement calibration value of the suspension pad (21).

2. The suspension pad stiffness attenuation detection system according to claim 1, characterized in that, The collision detection circuit (12) includes: a first branch circuit and a second branch circuit; The first input terminal of the first branch circuit is connected to the suspension pad limiting structure (11) located on the upper outer edge of the suspension pad (21), and the second input terminal is connected to the main frame (22). The first input terminal of the second branch circuit is connected to the suspension pad limiting structure (11) located on the lower outer edge of the suspension pad (21), and the second input terminal is connected to the main frame (22). The input terminal of the microprocessor (13) is connected to the output terminal of the first branch circuit and the output terminal of the second branch circuit respectively, and is used to acquire the first collision signal and / or the second collision signal collected by the first branch circuit when the suspension pad limiting structure (11) comes into contact with the main frame (22) within a preset time period. The collision signal collected by the collision detection circuit (12) includes the first collision signal and / or the second collision signal.

3. The suspension pad stiffness attenuation detection system according to claim 2, characterized in that, It also includes: a first collision return spring and a second collision return spring; The first collision return spring is coaxially arranged with the suspension pad limiting structure (11) located on the upper outer edge of the suspension pad (21), and the two are mechanically connected. At the same time, the first collision return spring is connected to the first input terminal of the first branch circuit. The first collision return spring is used to absorb impact energy through elastic deformation when the suspension pad limiting structure (11) comes into contact with the main frame (22), to provide buffer protection for the suspension pad (21), and to trigger the first branch circuit to collect the first collision signal; The second collision return spring is coaxially arranged with the suspension pad limiting structure (11) located on the lower outer edge of the suspension pad (21), and the two are mechanically connected. At the same time, the second collision return spring is connected to the first input terminal of the second branch circuit. The second collision return spring is used to absorb impact energy through elastic deformation when the suspension pad limiting structure (11) comes into contact with the main frame (22), to provide buffer protection for the suspension pad (21), and to trigger the second branch circuit to collect the second collision signal.

4. The suspension pad stiffness attenuation detection system according to any one of claims 1 to 3, characterized in that, The engine controller (14) is also used for: Obtain the current actual operating load of the vehicle and the current cumulative usage time of the suspension pads; The target maximum stiffness attenuation value corresponding to the current actual vehicle operating load and the current cumulative use time of the suspension pad is determined from the pre-calibrated correspondence between the actual vehicle operating load, the cumulative use time of the suspension pad, and the maximum allowable stiffness attenuation value of the suspension pad. With the load-bearing capacity of the powertrain mounting system remaining constant, the maximum allowable displacement limit of the mounting pad is determined based on the target maximum stiffness attenuation value and the load-bearing capacity. The maximum displacement limit of the suspension pad is determined as the collision distance reserved between the suspension pad limiting structure (11) and the main frame (22).

5. A method for detecting the stiffness attenuation of a suspended cushion, characterized in that, The stiffness attenuation detection method is applied to the engine controller (14) in the stiffness attenuation detection system according to any one of claims 1 to 4, wherein the stiffness attenuation detection method includes: Obtain the current driving status of the vehicle; When the current driving condition of the vehicle is consistent with the vehicle's calibrated driving condition, the collision signal collected by the collision detection circuit (12) is obtained when the suspension pad limit structure (11) comes into contact with the main frame (22) within a preset time period. The vehicle's calibrated driving condition is the vehicle driving condition corresponding to when the suspension pad (21) reaches the maximum displacement calibration value. If the collision signal exceeds the preset limit, it is determined that the stiffness of the suspension pad (21) has decreased, and an alarm message is output.

6. The method for detecting the stiffness attenuation of a suspended cushion according to claim 5, characterized in that, If the collision signal exceeds a preset limit, it is determined that the suspension pad (21) has experienced stiffness attenuation, and an alarm message is output, including: When the number of collisions within the preset time period exceeds the preset collision limit, it is determined that the stiffness of the suspended soft pad (21) has decreased, and an alarm prompt message is output. 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 a suspended cushion according to claim 5 or 6, characterized in that, If the collision signal exceeds a preset limit, it is determined that the suspension pad (21) has experienced stiffness attenuation, and an alarm message is output, including: When the cumulative collision contact time within the preset time period exceeds the preset collision contact time limit, it is determined that the stiffness of the suspended soft pad (21) has decreased, and an alarm prompt message is output. The collision signal includes the collision contact time, and the preset limit includes the preset collision contact time limit.

8. A device for detecting the stiffness attenuation of a suspended cushion, characterized in that, The engine controller (14) applied in the suspension pad stiffness attenuation detection system according to any one of claims 1 to 4, wherein the suspension pad stiffness attenuation detection device comprises: Driving condition acquisition unit, used to acquire the current driving condition of the vehicle; The collision signal acquisition unit is used to acquire the collision signal collected by the collision detection circuit (12) when the suspension pad limit structure (11) comes into contact with the main frame (22) within a preset time period when the current driving condition of the vehicle is consistent with the vehicle calibration driving condition. The vehicle calibration driving condition is the vehicle driving condition corresponding to the maximum displacement calibration value of the suspension pad (21). The stiffness attenuation determination unit is used to determine that the suspension pad (21) has experienced stiffness attenuation if the collision signal exceeds a preset limit, and to output an alarm message.

9. A computer storage medium, characterized in that, The computer storage medium stores at least one instruction, which, when executed by a processor, implements the suspension pad stiffness attenuation detection method as described in any one of claims 5 to 7.

10. An engine controller, characterized in that, The engine controller includes: a memory and a processor; The memory is used to store at least one instruction; The processor is used to execute at least one instruction to implement the suspension pad stiffness attenuation detection method as described in any one of claims 5 to 7.

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