An engine condition monitoring method and system

Abstract

This invention provides an engine condition monitoring method and system. The method includes: acquiring simulation results obtained by simulating the stress of each support leg of the engine in advance, and using the simulation results as a first alarm value; running the engine after pre-adjusting the support legs, and during engine operation, using strain gauges to collect the stress-strain signals of each support leg under the current operating condition of the engine, and converting each stress-strain signal into a stress value; comparing the stress value of each support leg with a second alarm value; if the stress value of the support leg exceeds the second alarm value, executing an alarm strategy or issuing an alarm; comparing the stress value of each support leg with the first alarm value; if the stress value of the support leg exceeds the first alarm value, shutting down the engine and issuing an alarm. Through the above method, the stress condition of the support legs can be monitored in real time, avoiding the problem of inaccurate monitoring or detection when engine support leg adjustments are abnormal.

Description

Technical Field

[0001] This invention relates to the field of engine technology, and in particular to an engine condition monitoring method and system. Background Technology

[0002] Engines typically experience significant vibrations during operation, causing periodic impacts on the support legs and chassis. This is especially true for engines with a large number of cylinders and support legs, making adjustment and installation complex. If the engine support legs are not properly adjusted initially, or if they are damaged for other reasons, uneven stress on the support legs can lead to abnormal engine vibration, causing abnormal stress on the engine and its output.

[0003] In existing technologies, the adjustment of engine support legs mainly relies on dimensional installation and positioning, and the adjustment method is singular. Once there is a problem with dimensional control or abnormal adjustment, it cannot be accurately monitored or detected. Summary of the Invention

[0004] In view of this, embodiments of the present invention provide an engine status monitoring method and system to solve the problem in the prior art that the engine support leg cannot be accurately monitored or detected when the adjustment is abnormal.

[0005] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0006] The first aspect of this invention discloses an engine condition monitoring method, the method comprising:

[0007] The simulation results obtained by simulating the stress of each support leg of the engine are obtained in advance, and the upper limit value of the stress of the support leg in the simulation results is used as the first alarm value.

[0008] After the engine is pre-adjusted with support legs, during the operation of the engine, strain gauges are used to collect stress and strain signals of each support leg under the current operating condition of the engine, and each stress and strain signal is converted into a stress value.

[0009] The stress value of each of the support legs is compared with a second alarm value, which is set based on a preset deviation value between the support legs of the engine and the allowable stress variation range of the support legs. The second alarm value is less than the first alarm value.

[0010] If the stress value of the supporting leg exceeds the second alarm value, the alarm strategy is executed or an alarm is triggered.

[0011] The stress value of each of the support legs is compared with the first alarm value;

[0012] If the stress value of the support leg exceeds the first alarm value, the engine is shut down and an alarm is triggered.

[0013] Optionally, the method includes:

[0014] The stress of each support leg of the engine is simulated to obtain the simulation results of the support leg, and the simulation results include the upper limit value of the stress of the support leg;

[0015] Based on the simulation results, the installation position of the strain gauge on the support leg is determined, and the free and unforced state of the support leg is calibrated as zero.

[0016] The engine is controlled to fall, and the stress and strain values ​​of the support legs at the same position on both sides of the engine are monitored during the engine's fall.

[0017] The stress and strain values ​​of the support legs at the same positions on both sides of the engine are compared with the simulation results;

[0018] If the comparison result is greater than the preset limit, the support leg is installed and adjusted.

[0019] Optional, also includes:

[0020] The stress and strain values ​​of the support legs at the same position on both sides of the engine are determined in real time by monitoring.

[0021] When the stress and strain values ​​of the support legs at the same position on both sides of the engine exceed the maximum stress limit that the support legs can withstand, the engine is controlled to stop falling.

[0022] Optionally, after converting each stress-strain signal into a stress value and before comparing the stress value of each support leg with the second alarm value, the method further includes:

[0023] Collect the engine speed signal and the current fuel level of the engine;

[0024] The current operating condition of the engine is determined based on the speed signal and the current oil level, and the stress value of each support leg corresponding to the current operating condition is determined.

[0025] Optionally, if the operating conditions include idling, high torque, and calibration point conditions, determining the current operating condition of the engine based on the speed signal and the current fuel quantity, and determining the stress value of each support leg corresponding to the current operating condition, includes:

[0026] The current operating condition of the engine is determined based on the speed signal and the current fuel level;

[0027] If the current operating condition is an idling condition, determine the first stress value of each of the support legs corresponding to the idling condition;

[0028] If the current working condition is a high torque working condition, determine the second stress value of each of the support legs corresponding to the high torque working condition;

[0029] If the current working condition is the calibration point working condition, determine the third stress value of each of the support legs corresponding to the calibration point working condition.

[0030] A second aspect of this invention discloses an engine condition monitoring system, the system comprising:

[0031] The acquisition unit is used to acquire the simulation results obtained by simulating the stress of each support leg of the engine in advance, and to use the upper limit value of the stress of the support leg in the simulation results as the first alarm value.

[0032] A stress-strain processing unit is used to operate an engine after the support legs have been pre-adjusted. During the operation of the engine, strain gauges are used to collect stress-strain signals of each support leg under the current operating condition of the engine, and each stress-strain signal is converted into a stress value.

[0033] The electronic control unit is used to compare the stress value of each of the support legs with a second alarm value, which is set based on a preset deviation value between the engine support legs and the allowable stress variation range of the support legs. The second alarm value is less than the first alarm value. If the stress value of a support leg exceeds the second alarm value, an alarm strategy is executed or an alarm is triggered. The unit also compares the stress value of each of the support legs with the first alarm value. If the stress value of a support leg exceeds the first alarm value, the engine is shut down and an alarm is triggered.

[0034] Optionally, the system includes:

[0035] The simulation unit is used to simulate the stress of each support leg of the engine and obtain the simulation results of the support leg, including the upper limit value of the stress of the support leg;

[0036] The determination unit is used to determine the installation position of the strain gauge on the support leg based on the simulation results, and to calibrate the free and unforced state of the support leg as zero point;

[0037] The monitoring unit is used to control the engine to fall, and during the engine's fall, it monitors the stress and strain values ​​of the support legs at the same position on both sides of the engine.

[0038] The comparison unit is used to compare the stress and strain values ​​of the support legs at the same position on both sides of the engine with the simulation results; if the comparison result is greater than the preset limit, the support legs are installed and adjusted.

[0039] Optional, also includes:

[0040] The judgment unit is used to judge the stress and strain values ​​of the support legs at the same position on both sides of the engine in real time. If the stress and strain values ​​of the support legs at the same position on both sides of the engine are greater than the maximum stress limit that the support legs can withstand, the control unit is executed.

[0041] The control unit is used to control the engine to stop falling.

[0042] Optionally, after the stress-strain processing unit converts each stress-strain signal into a stress value, and before the electronic control unit compares the stress value of each support leg with the second alarm value, the electronic control unit further configures itself to:

[0043] The engine speed signal and the current fuel level of the engine are collected; the current operating condition of the engine is determined based on the speed signal and the current fuel level, and the stress value of each support leg corresponding to the current operating condition is determined.

[0044] Optionally, if the operating conditions include idling, high torque, and calibration point conditions, the electronic control unit used to determine the current operating condition of the engine based on the speed signal and the current fuel quantity, and to determine the stress value of each support leg corresponding to the current operating condition, is specifically used for:

[0045] The current operating condition of the engine is determined based on the speed signal and the current fuel quantity; if the current operating condition is idling, a first stress value is determined for each support leg corresponding to the idling condition; if the current operating condition is high torque, a second stress value is determined for each support leg corresponding to the high torque condition; if the current operating condition is calibration point, a third stress value is determined for each support leg corresponding to the calibration point.

[0046] An engine condition monitoring method and system based on the above embodiments of the present invention includes: acquiring simulation results obtained by simulating the stress of each support leg of the engine in advance, and using the simulation results as a first alarm value; running the engine after pre-adjusting the support legs, and during the engine operation, using strain gauges to collect stress-strain signals of each support leg under the current operating condition of the engine, and converting each stress-strain signal into a stress value; comparing the stress value of each support leg with a second alarm value, wherein the second alarm value is set based on a preset deviation value between the support legs of the engine and the allowable stress variation range of the support legs, and the second alarm value is less than the first alarm value; if the stress value of the support leg exceeds the second alarm value, executing an alarm strategy or issuing an alarm; comparing the stress value of each support leg with the first alarm value; if the stress value of the support leg exceeds the first alarm value, shutting down the engine and issuing an alarm. In this solution, the support legs of the engine to be operated are pre-adjusted. During the operation of the engine, the stress and strain signals of each support leg are converted into stress values. When the stress value of the support leg exceeds the second alarm value, an alarm strategy is executed or an alarm is triggered. When the stress value of the support leg exceeds the first alarm value, the engine is shut down and an alarm is triggered. This allows for real-time monitoring of the stress on the support legs, avoiding the problem of inaccurate monitoring or detection when the engine support legs are abnormally adjusted. Attached Figure Description

[0047] 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 provided drawings without creative effort.

[0048] Figure 1 This is a flowchart illustrating an engine status monitoring method provided in an embodiment of the present invention;

[0049] Figure 2 A flowchart illustrating an engine support leg adjustment method provided in an embodiment of the present invention;

[0050] Figure 3 This is a schematic diagram illustrating the principle of engine status monitoring according to an embodiment of the present invention;

[0051] Figure 4 This is a schematic diagram of an engine status monitoring system provided in an embodiment of the present invention. Detailed Implementation

[0052] 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.

[0053] In this application, 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 limitation, 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.

[0054] As can be seen from the background technology, in the existing technology, the adjustment of engine support legs mainly relies on the size installation positioning, and the adjustment method is singular. Once there is a problem with size control or abnormal adjustment, it cannot be accurately monitored or detected.

[0055] Therefore, this invention provides an engine status monitoring method and system. In this solution, the support legs of the engine to be operated are pre-adjusted. During engine operation, the stress and strain signals of each support leg are converted into stress values. When the stress value of a support leg exceeds a second alarm value, an alarm strategy is executed or an alarm is triggered. When the stress value of a support leg exceeds a first alarm value, the engine is shut down and an alarm is triggered. This method enables real-time monitoring of the stress on the support legs, avoiding the problem of inaccurate monitoring or detection when engine support leg adjustments are abnormal.

[0056] like Figure 1 The diagram shown is a flowchart of an engine status monitoring method provided by an embodiment of the present invention. The method mainly includes the following steps:

[0057] Step S101: Obtain the simulation results obtained by simulating the stress of each support leg of the engine in advance, and use the upper limit value of the stress of the support leg in the simulation results as the first alarm value.

[0058] In the specific implementation step S101, the stress of each support leg of the engine is simulated in advance, the simulation results are obtained, the upper limit value of the stress of the support leg in the simulation results is determined, and the upper limit value of the stress of the support leg is used as the first alarm value.

[0059] Step S102: Run the engine after the support legs have been pre-adjusted. During engine operation, use strain gauges to collect the stress and strain signals of each support leg under the current operating conditions of the engine, and convert each stress and strain signal into a stress value.

[0060] It should be noted that the strain gauges are mounted on the engine's support legs.

[0061] It should be noted that the operating conditions include, but are not limited to, idling, high torque, and calibration point conditions.

[0062] When the engine is under different operating conditions, the stress state of the support leg will change differently due to the different combustion conditions of the engine.

[0063] In the specific implementation of step S102, the support legs of the engine to be run are adjusted in advance. After the adjustment is completed, the engine is run. During the operation of the engine, strain gauges are used to collect the stress and strain signals of each support leg of the engine under the current operating condition, and each stress and strain signal is converted into a stress value.

[0064] Step S103: Compare the stress value of each support leg with the second alarm value. If the stress value of the support leg exceeds the second alarm value, proceed to step S104. If the stress value of the support leg does not exceed the second alarm value, return to step S102.

[0065] In step S103, the second alarm value is set based on the preset deviation value between the engine's support legs and the allowable stress variation range of the support legs.

[0066] The second alarm value is lower than the first alarm value.

[0067] It should be noted that the support legs on both sides of the engine are generally symmetrical. When the support legs are properly adjusted, the force on both sides is equal, and the deviation between the two support legs is relatively small.

[0068] It should be noted that the maximum stress value during normal engine operation should be much lower than the first alarm value. In order to detect problems in time, an early warning value, namely the second alarm value, is added between the stress value during normal engine operation and the first alarm value.

[0069] Step S104: Execute the alarm policy or trigger an alarm.

[0070] In step S104, the alarm strategy includes, but is not limited to, limiting the torque of the engine or returning the engine to idle speed.

[0071] In the specific implementation of step S104, when comparing the stress value of each support leg with the second alarm value, if the stress value of any support leg exceeds the second alarm value, then the alarm strategy is executed or an alarm is triggered.

[0072] Step S105: Compare the stress value of each support leg with the first alarm value. If the stress value of the support leg exceeds the first alarm value, proceed to step S106. If the stress value of the support leg does not exceed the first alarm value, return to step S102.

[0073] Step S106: Turn off the engine and sound an alarm.

[0074] In the specific implementation of step S106, when the stress value of each support leg is compared with the first alarm value, if the stress value of any support leg exceeds the first alarm value, the engine is shut down and an alarm is triggered, that is, the engine is stopped and an alarm is triggered.

[0075] An engine condition monitoring method based on an embodiment of the present invention involves obtaining simulation results obtained by simulating the stress of each support leg of the engine in advance, and using the simulation results as a first alarm value; running the engine after pre-adjusting the support legs, and during engine operation, using strain gauges to collect the stress-strain signals of each support leg under the current operating condition of the engine, and converting each stress-strain signal into a stress value; comparing the stress value of each support leg with a second alarm value, which is set based on a preset deviation value between the engine's support legs and the allowable stress variation range of the support legs, and the second alarm value is less than the first alarm value; if the stress value of a support leg exceeds the second alarm value, executing an alarm strategy or issuing an alarm; comparing the stress value of each support leg with the first alarm value; if the stress value of a support leg exceeds the first alarm value, shutting down the engine and issuing an alarm. In this solution, the support legs of the engine to be operated are pre-adjusted. During the operation of the engine, the stress and strain signals of each support leg are converted into stress values. When the stress value of the support leg exceeds the second alarm value, an alarm strategy is executed or an alarm is triggered. When the stress value of the support leg exceeds the first alarm value, the engine is shut down and an alarm is triggered. This allows for real-time monitoring of the stress on the support legs, avoiding the problem of inaccurate monitoring or detection when the engine support legs are abnormally adjusted.

[0076] An engine status monitoring method based on the above embodiments of the present invention, such as... Figure 2 The diagram shown is a flowchart illustrating an engine support leg adjustment method according to an embodiment of the present invention. The method includes the following steps:

[0077] Step S201: Simulate the stress of each support leg of the engine to obtain the simulation results of the support leg.

[0078] In step S201, the simulation results include the upper limit of stress of the support leg.

[0079] In the specific implementation step S201, the stress of each support leg of the engine is simulated to determine the stress distribution of the support leg and obtain the simulation results of the support leg.

[0080] Step S202: Based on the simulation results, determine the installation position of the strain gauge on the support leg, and mark the free and unforced state of the support leg as the zero point.

[0081] In step S202, the strain gauge should be installed at the same or similar position on the support legs on both sides of the engine.

[0082] Step S203: Control the engine to fall. During the engine's fall, monitor the stress and strain values ​​of the support legs at the same positions on both sides of the engine.

[0083] In the specific implementation of step S203, after the engine support legs are pre-leveled, the engine is controlled to fall. During the process of the engine falling to a standstill, the stress and strain values ​​of the support legs at the same position on both sides of the engine are monitored.

[0084] Step S204: Compare the stress and strain values ​​of the support legs at the same position on both sides of the engine with the simulation results. If the comparison result is greater than the preset limit, proceed to step S205. If the comparison result is not greater than the preset limit, no adjustment of the support legs is required, and return to step S203.

[0085] In step S204, the preset limit refers to the stress and strain values ​​of the support legs at the same position on both sides of the engine being less than the first alarm value.

[0086] Optionally, the preset limit means that the force on the support legs at the same position on both sides of the engine is at the same level, that is, uniform force, such as the stress deviation of the support legs at the same position on both sides of the engine being less than 10%.

[0087] Step S205: Install and adjust the support legs.

[0088] In the specific implementation of step S205, when comparing the stress and strain values ​​of the support legs at the same position on both sides of the engine with the simulation results, if the comparison result is greater than the preset limit, the support legs are installed and adjusted.

[0089] Optionally, in one specific embodiment, if the comparison result is greater than the preset limit, the support legs are installed and adjusted once according to the stress and strain values ​​of the support legs at the same position on both sides of the engine, and the process returns to steps S203 and S204. If the comparison result is still greater than the preset limit at this time, the support legs are installed and adjusted again according to the stress and strain values ​​of the support legs at the same position on both sides of the engine, until the stress and strain values ​​of the support legs at the same position on both sides of the engine meet the preset limit.

[0090] Optionally, during the engine's descent, the following may also be included:

[0091] Step S11: In real time, determine the stress and strain values ​​of the support legs at the same position on both sides of the engine obtained from monitoring. If the stress and strain values ​​of the support legs at the same position on both sides of the engine are greater than the maximum stress limit of the support legs, proceed to step S12. If the stress and strain values ​​of the support legs at the same position on both sides of the engine are not greater than the maximum stress limit of the support legs, continue to proceed to step S11.

[0092] Step S12: Control the engine to stop the descent.

[0093] In the specific implementation of step S12, during the engine's descent, if the stress-strain values ​​of the support legs at the same positions on both sides of the engine are determined to be greater than the maximum stress limit that the support legs can withstand, then the engine is controlled to stop falling.

[0094] An engine condition monitoring method based on an embodiment of the present invention monitors the stress and strain values ​​of the support legs at the same position on both sides of the engine. The stress and strain values ​​of the support legs at the same position on both sides of the engine are compared with the simulation results. When the comparison result is greater than a preset limit, the support legs are installed and adjusted. This allows for real-time monitoring of the stress on the support legs and avoids the problem of inaccurate monitoring or detection when the engine support legs are abnormally adjusted.

[0095] Based on the engine condition monitoring method provided in the above embodiments of the present invention, after performing step S102 to convert each stress-strain signal into a stress value, and before performing step S103 to compare the stress value of each support leg with the second alarm value, the method further includes:

[0096] Step S21: Collect the engine speed signal and the current fuel level of the engine.

[0097] Step S22: Determine the current operating condition of the engine based on the speed signal and the current fuel quantity, and determine the stress value of each support leg corresponding to the current operating condition.

[0098] Optionally, if the operating conditions include idling, high torque, and calibration point conditions, step S22, which determines the current operating condition of the engine based on the speed signal and current fuel quantity, and determines the stress value of each support leg corresponding to the current operating condition, includes:

[0099] Step S31: Determine the current operating condition of the engine based on the speed signal and the current fuel quantity. If the current operating condition of the engine is idling, proceed to step S32. If the current operating condition of the engine is high torque, proceed to step S33. If the current operating condition of the engine is calibration point, proceed to step S34.

[0100] Step S32: Determine the first stress value of each support leg corresponding to the idling condition.

[0101] In the specific implementation of step S32, it can be known from the speed signal and the current oil quantity that the current operating condition of the engine is idling, so the first stress value of each support leg corresponding to the idling condition can be determined.

[0102] Step S33: Determine the second stress value for each support leg corresponding to the high torque condition.

[0103] In the specific implementation of step S33, it can be known from the speed signal and the current oil quantity that the current operating condition of the engine is a high torque condition, so the second stress value of each support leg corresponding to the high torque condition can be determined.

[0104] Step S34: Determine the third stress value for each support leg corresponding to the calibration point working condition.

[0105] In the specific implementation of step S34, it can be known from the speed signal and the current oil quantity that the current operating condition of the engine is the calibration point condition, so the third stress value of each support leg corresponding to the calibration point condition can be determined.

[0106] Optionally, based on the stress values ​​of each support leg corresponding to different engine operating conditions, step S103, which compares the stress value of each support leg with the second alarm value, includes:

[0107] The first, second, or third stress value of each support leg is compared with the second alarm value. If the first, second, or third stress value of the support leg exceeds the second alarm value, the alarm strategy is executed or an alarm is triggered.

[0108] Optionally, based on the stress values ​​of each support leg corresponding to different engine operating conditions, step S105 compares the stress value of each support leg with the first alarm value, including:

[0109] The first stress value, or the second stress value, or the third stress value of each support leg is compared with the first alarm value. If the first stress value, or the second stress value, or the third stress value of the support leg exceeds the first alarm value, the engine is shut off and an alarm is triggered.

[0110] An engine status monitoring method based on an embodiment of the present invention determines the current operating condition of the engine based on the speed signal and the current fuel quantity, and determines the stress value of each support leg corresponding to the current operating condition. For the current operating condition, when the stress value of the support leg exceeds the second alarm value, an alarm strategy is executed or an alarm is triggered. When the stress value of the support leg exceeds the first alarm value, the engine is shut down and an alarm is triggered. This allows for real-time monitoring of the stress on the support legs, avoiding the problem of inaccurate monitoring or detection when the engine support legs are abnormally adjusted.

[0111] To better understand the above explanation, as follows: Figure 3 The diagram shown is a schematic representation of the principle of engine status monitoring provided in an embodiment of the present invention.

[0112] exist Figure 3 In the engine, there are six support legs, and each support leg is equipped with a strain gauge. Once the support is subjected to force, the support leg will deform.

[0113] Therefore, during engine operation, the stress and strain processing unit uses strain gauges to collect stress and strain signals of each support leg under the current operating conditions of the engine, converts each stress and strain signal into a stress value, and inputs the stress value of each support leg to the electronic control unit.

[0114] The electronic control unit receives the stress value of each support leg and performs logical judgment.

[0115] The electronic control unit collects the engine speed signal and the current fuel level of the engine, determines the current operating condition of the engine based on the speed signal and the current fuel level, and determines the stress value of each support leg corresponding to the current operating condition.

[0116] The electronic control unit determines whether the stress value of each support leg exceeds the second alarm threshold. If the stress value of the support leg exceeds the second alarm threshold, an alarm strategy is executed or an alarm is triggered. The alarm strategy typically involves limiting the torque of the engine.

[0117] The electronic control unit determines whether the stress value of each support leg exceeds the first alarm value. If the stress value of the support leg exceeds the first alarm value, the engine is shut down and an alarm is triggered.

[0118] Based on the engine status monitoring method provided by the embodiments of the present invention, the support legs of the engine to be run are pre-adjusted. During the operation of the engine, the stress and strain signals of each support leg are converted into stress values. When the stress value of the support leg exceeds the second alarm value, an alarm strategy is executed or an alarm is triggered. When the stress value of the support leg exceeds the first alarm value, the engine is shut down and an alarm is triggered. This allows for real-time monitoring of the stress on the support legs, avoiding the problem of inaccurate monitoring or detection when the engine support legs are abnormally adjusted.

[0119] Compared with the above embodiments of the present invention Figure 1 Corresponding to the engine condition monitoring method shown, this embodiment of the invention also provides an engine condition monitoring system, such as... Figure 4 As shown, the engine condition monitoring system includes: an acquisition unit 41, a stress and strain processing unit 42, and an electronic control unit 43.

[0120] The acquisition unit 41 is used to acquire the simulation results obtained by simulating the stress of each support leg of the engine in advance, and to use the upper limit value of the stress of the support leg in the simulation results as the first alarm value.

[0121] The stress-strain processing unit 42 is used to run the engine after the support legs have been pre-adjusted. During engine operation, strain gauges are used to collect stress-strain signals of each support leg under the current operating conditions of the engine, and each stress-strain signal is converted into a stress value.

[0122] The electronic control unit 43 is used to compare the stress value of each support leg with a second alarm value, wherein the second alarm value is set based on a preset deviation value between the engine support legs and the allowable stress variation range of the support legs, and the second alarm value is less than the first alarm value; if the stress value of the support leg exceeds the second alarm value, an alarm strategy is executed or an alarm is triggered; the stress value of each support leg is compared with the first alarm value; if the stress value of the support leg exceeds the first alarm value, the engine is shut down and an alarm is triggered.

[0123] It should be noted that the specific principles and execution processes of each module or unit in the engine condition monitoring system disclosed in the above embodiments of the present invention are the same as those of the engine condition monitoring method implemented in the above embodiments of the present invention. Please refer to the corresponding parts of the engine condition monitoring method disclosed in the above embodiments of the present invention, which will not be repeated here.

[0124] Based on the engine status monitoring system provided by the embodiments of the present invention, the support legs of the engine to be operated are pre-adjusted. During the operation of the engine, the stress and strain signals of each support leg are collected and converted into stress values. When the stress value of the support leg exceeds the second alarm value, an alarm strategy is executed or an alarm is triggered. When the stress value of the support leg exceeds the first alarm value, the engine is shut down and an alarm is triggered. This system can monitor the stress on the support legs in real time and avoid the problem of inaccurate monitoring or detection when the engine support legs are abnormally adjusted.

[0125] Optionally, based on the above Figure 4 The engine condition monitoring system shown, combined with Figure 4 The engine condition monitoring system is further equipped with a simulation unit, a determination unit, a monitoring unit, and a comparison unit.

[0126] The simulation unit is used to simulate the stress of each support leg of the engine and obtain the simulation results of the support leg, including the upper limit value of the stress of the support leg.

[0127] The determination unit is used to determine the installation position of the strain gauge on the support leg based on the simulation results, and to calibrate the free and unstressed state of the support leg as the zero point.

[0128] The monitoring unit is used to control the engine's descent movement and monitors the stress and strain values ​​of the support legs at the same positions on both sides of the engine during the descent process.

[0129] The comparison unit is used to compare the stress and strain values ​​of the support legs at the same position on both sides of the engine with the simulation results; if the comparison result is greater than the preset limit, the support legs are installed and adjusted.

[0130] Optionally, based on the above Figure 4 The engine condition monitoring system shown, combined with Figure 4 The engine status monitoring system also includes a judgment unit and a control unit.

[0131] The judgment unit is used to judge the stress and strain values ​​of the support legs at the same position on both sides of the engine in real time. If the stress and strain values ​​of the support legs at the same position on both sides of the engine are greater than the maximum stress limit that the support legs can withstand, the control unit is executed.

[0132] The control unit is used to stop the engine from falling.

[0133] An engine condition monitoring system based on an embodiment of the present invention monitors the stress and strain values ​​of the support legs at the same position on both sides of the engine. The system compares the stress and strain values ​​of the support legs at the same position on both sides of the engine with the simulation results. When the comparison result is greater than a preset limit, the support legs are installed and adjusted. This allows for real-time monitoring of the stress on the support legs and avoids the problem of inaccurate monitoring or detection when the engine support legs are abnormally adjusted.

[0134] Optionally, based on the above Figure 4 The engine condition monitoring system shown, after the stress-strain processing unit 42 converts each stress-strain signal into a stress value, and before the electronic control unit 43 compares the stress value of each support leg with the second alarm value, further includes the following:

[0135] Collect engine speed signals and current fuel level; determine the engine's current operating condition based on the speed signals and current fuel level, and determine the stress value of each support leg corresponding to the current operating condition.

[0136] Optionally, based on the above Figure 4 The engine condition monitoring system shown, if the operating conditions include idling, high torque, and calibration point conditions, the electronic control unit 43, which determines the current engine operating condition based on the speed signal and current fuel quantity, and determines the stress value of each support leg corresponding to the current operating condition, is specifically used for:

[0137] The engine's current operating condition is determined based on the speed signal and current fuel level. If the current operating condition is idling, the first stress value of each support leg corresponding to the idling condition is determined. If the current operating condition is high torque, the second stress value of each support leg corresponding to the high torque condition is determined. If the current operating condition is calibration point, the third stress value of each support leg corresponding to the calibration point condition is determined.

[0138] An engine status monitoring system based on an embodiment of the present invention determines the current operating condition of the engine based on the speed signal and the current fuel level, and determines the stress value of each support leg corresponding to the current operating condition. For the current operating condition, when the stress value of the support leg exceeds the second alarm value, an alarm strategy is executed or an alarm is triggered. When the stress value of the support leg exceeds the first alarm value, the engine is shut down and an alarm is triggered. This enables real-time monitoring of the stress on the support legs, avoiding the problem of inaccurate monitoring or detection when the engine support legs are abnormally adjusted.

[0139] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, for system or system embodiments, since they are basically similar to method embodiments, the description is relatively simple, and relevant parts can be referred to the descriptions in the method embodiments. The systems and system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0140] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0141] 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. An engine condition monitoring method, characterized in that, The method includes: The simulation results obtained by simulating the stress of each support leg of the engine are obtained in advance, and the upper limit value of the stress of the support leg in the simulation results is used as the first alarm value. After the engine is pre-adjusted with support legs, during the operation of the engine, strain gauges are used to collect stress and strain signals of each support leg under the current operating condition of the engine, and each stress and strain signal is converted into a stress value. The stress value of each of the support legs is compared with a second alarm value, which is set based on a preset deviation value between the support legs of the engine and the allowable stress variation range of the support legs. The second alarm value is less than the first alarm value. If the stress value of the support leg exceeds the second alarm value, an alarm strategy is executed or an alarm is triggered; wherein, the alarm strategy includes limiting the torque of the engine or returning the engine to idle speed; The stress value of each of the support legs is compared with the first alarm value; If the stress value of the support leg exceeds the first alarm value, the engine is shut down and an alarm is triggered; The method further includes: The stress of each support leg of the engine is simulated to obtain the simulation results of the support leg, and the simulation results include the upper limit value of the stress of the support leg; Based on the simulation results, the installation position of the strain gauge on the support leg is determined, and the free and unforced state of the support leg is calibrated as zero. The engine is controlled to fall, and the stress and strain values ​​of the support legs at the same position on both sides of the engine are monitored during the engine's fall. The stress and strain values ​​of the support legs at the same positions on both sides of the engine are compared with the simulation results; If the comparison result is greater than the preset limit, the support leg is installed and adjusted; the preset limit indicates that the support legs at the same position on both sides of the engine are under the same force.

2. The method according to claim 1, characterized in that, Also includes: The stress and strain values ​​of the support legs at the same position on both sides of the engine are determined in real time by monitoring. When the stress and strain values ​​of the support legs at the same position on both sides of the engine exceed the maximum stress limit that the support legs can withstand, the engine is controlled to stop falling.

3. The method according to claim 1, characterized in that, After converting each stress-strain signal into a stress value and before comparing the stress value of each support leg with the second alarm value, the method further includes: Collect the engine speed signal and the current fuel level of the engine; The current operating condition of the engine is determined based on the speed signal and the current oil level, and the stress value of each support leg corresponding to the current operating condition is determined.

4. The method according to claim 3, characterized in that, If the operating conditions include idling, high torque, and calibration point conditions, determining the current operating condition of the engine based on the speed signal and the current fuel quantity, and determining the stress value of each support leg corresponding to the current operating condition, includes: The current operating condition of the engine is determined based on the speed signal and the current fuel level; If the current operating condition is an idling condition, determine the first stress value of each of the support legs corresponding to the idling condition; If the current working condition is a high torque working condition, determine the second stress value of each of the support legs corresponding to the high torque working condition; If the current working condition is the calibration point working condition, determine the third stress value of each of the support legs corresponding to the calibration point working condition.

5. An engine condition monitoring system, characterized in that, The system includes: The acquisition unit is used to acquire the simulation results obtained by simulating the stress of each support leg of the engine in advance, and to use the upper limit value of the stress of the support leg in the simulation results as the first alarm value. A stress-strain processing unit is used to operate an engine after the support legs have been pre-adjusted. During the operation of the engine, strain gauges are used to collect stress-strain signals of each support leg under the current operating condition of the engine, and each stress-strain signal is converted into a stress value. The electronic control unit (ECU) is used to compare the stress value of each of the support legs with a second alarm value, which is set based on a preset deviation value between the engine support legs and the allowable stress variation range of the support legs. The second alarm value is less than the first alarm value. If the stress value of a support leg exceeds the second alarm value, an alarm strategy is executed or an alarm is triggered. The ECU also compares the stress value of each of the support legs with the first alarm value. If the stress value of a support leg exceeds the first alarm value, the engine is shut down and an alarm is triggered. The alarm strategy includes limiting engine torque or returning the engine to idle speed. The system also includes: The simulation unit is used to simulate the stress of each support leg of the engine and obtain the simulation results of the support leg, including the upper limit value of the stress of the support leg; The determination unit is used to determine the installation position of the strain gauge on the support leg based on the simulation results, and to calibrate the free and unforced state of the support leg as zero point; The monitoring unit is used to control the engine to fall, and during the engine's fall, it monitors the stress and strain values ​​of the support legs at the same position on both sides of the engine. The comparison unit is used to compare the stress and strain values ​​of the support legs at the same position on both sides of the engine with the simulation results; if the comparison result is greater than a preset limit, the support legs are installed and adjusted; the preset limit indicates that the force on the support legs at the same position on both sides of the engine is at the same level.

6. The system according to claim 5, characterized in that, Also includes: The judgment unit is used to judge the stress and strain values ​​of the support legs at the same position on both sides of the engine in real time. If the stress and strain values ​​of the support legs at the same position on both sides of the engine are greater than the maximum stress limit of the support legs, the control unit is executed. The control unit is used to control the engine to stop falling.

7. The system according to claim 5, characterized in that, After the stress-strain processing unit converts each stress-strain signal into a stress value, and before the electronic control unit compares the stress value of each support leg with the second alarm value, the electronic control unit further configures itself to: The engine speed signal and the current fuel level of the engine are collected; the current operating condition of the engine is determined based on the speed signal and the current fuel level, and the stress value of each support leg corresponding to the current operating condition is determined.

8. The system according to claim 7, characterized in that, If the operating conditions include idling, high torque, and calibration point conditions, the electronic control unit used to determine the current operating condition of the engine based on the speed signal and the current fuel quantity, and to determine the stress value of each support leg corresponding to the current operating condition, is specifically used for: The current operating condition of the engine is determined based on the speed signal and the current fuel level; if the current operating condition is idling, the first stress value of each support leg corresponding to the idling condition is determined. If the current working condition is a high torque working condition, determine the second stress value of each of the support legs corresponding to the high torque working condition; If the current working condition is the calibration point working condition, determine the third stress value of each of the support legs corresponding to the calibration point working condition.

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