Main pump solenoid sticking detection method, device, equipment and working machine

Abstract

The present application relates to the technical field of electromagnetic valve fault detection, and provides a main pump electromagnetic valve sticking detection method, device, equipment and working machine, the method comprises the following steps: obtaining the first initial pressure corresponding to the front pump of the main pump and the second initial pressure corresponding to the rear pump of the main pump when the working machine starts; obtaining the first detection pressure of the front pump and the second detection pressure of the rear pump after the working machine starts; in the case where the logical relationship between the first initial pressure, the second initial pressure, the first detection pressure and the second detection pressure does not meet the preset sticking detection logic, it is determined that the main pump electromagnetic valve exists sticking. The present application is used to solve the problem that the existing electromagnetic valve sticking determination method cannot accurately determine whether the electromagnetic valve of the working machine is stuck, and realizes accurate determination of whether the electromagnetic valve is stuck.

Description

Technical Field

[0001] This invention relates to the field of solenoid valve fault detection technology, and in particular to a method, device, equipment and machinery for detecting sticking in a main pump solenoid valve. Background Technology

[0002] In existing technologies, two methods are generally used to determine if a solenoid valve is stuck. One method involves analyzing the solenoid valve's drive current and the forward or return displacement curves of the valve core. Specifically, this involves checking if the drive current curve has a rising edge inflection point and a falling edge inflection point. If both are present, the solenoid valve is considered stuck. The other method involves detecting the difference between the actual pressure and the desired pressure. If the difference exceeds a preset value, the solenoid valve is considered stuck.

[0003] However, for operational machinery, due to the specific working conditions, it is normal for the drive circuit curve to have inflection points in actual operation. Therefore, the first method is not applicable. Furthermore, regarding the second method, due to differences between manufacturers, or even within the same manufacturer but due to manufacturing process errors, solenoid valves may vary, resulting in non-unique preset values. Therefore, using this method may lead to misjudgments. Summary of the Invention

[0004] This invention provides a method, apparatus, equipment, and machinery for detecting the jamming of a main pump solenoid valve, which solves the problem that existing solenoid valve jamming determination methods cannot accurately determine whether the solenoid valve of a working machine is jammed, and achieves accurate determination of whether the solenoid valve is jammed.

[0005] This invention provides a method for detecting jamming of a main pump solenoid valve, comprising:

[0006] Obtain the first initial pressure corresponding to the front pump of the main pump and the second initial pressure corresponding to the rear pump of the main pump when the working machinery starts;

[0007] The first detection pressure of the front pump and the second detection pressure of the rear pump are obtained after the working machinery is started, wherein the first detection pressure and the second detection pressure are the actual detection pressures of the main pump under different working conditions;

[0008] If the logical relationship between the first initial pressure, the second initial pressure, the first detection pressure, and the second detection pressure does not conform to the preset jamming detection logic, it is determined that the main pump solenoid valve is jammed.

[0009] According to the present invention, a method for detecting jamming of a main pump solenoid valve is provided, wherein the first detection pressure includes: a first actual detection sub-pressure corresponding to the front pump and a second actual detection sub-pressure corresponding to the rear pump, and the second detection pressure includes: a third actual detection sub-pressure corresponding to the front pump and a fourth actual detection sub-pressure corresponding to the rear pump;

[0010] The step of determining that the main pump solenoid valve is stuck when the logical relationship between the first initial pressure, the second initial pressure, the first detection pressure, and the second detection pressure does not conform to the preset jamming detection logic includes:

[0011] Determine a first logical relationship between the first actual detection sub-pressure, the second actual detection sub-pressure, the first initial pressure, the second initial pressure, and the first preset value;

[0012] Determine a second logical relationship between the first actual detection sub-pressure, the second actual detection sub-pressure, the third actual detection sub-pressure, the fourth actual detection sub-pressure, and the second preset value;

[0013] Determine a first magnitude relationship between the first actual detection sub-pressure and the third actual detection sub-pressure;

[0014] Determine a second magnitude relationship between the second actual detection sub-pressure and the fourth actual detection sub-pressure;

[0015] If any one or more of the first logical relationship, the second logical relationship, the first size relationship, and the second size relationship do not conform to the jamming detection logic, it is determined that the main pump solenoid valve is jammed.

[0016] According to the present invention, a method for detecting jamming of a main pump solenoid valve, wherein determining the first logical relationship between the first actual detection sub-pressure, the second actual detection sub-pressure, the first initial pressure, the second initial pressure, and a first preset value includes:

[0017] Calculate the first absolute value of the first difference between the first actual detection sub-pressure and the first initial pressure;

[0018] Calculate the second absolute value of the second difference between the second actual detection sub-pressure and the second initial pressure;

[0019] Calculate the third difference between the first absolute value and the second absolute value;

[0020] The third size relationship between the third difference and the first preset value is determined as the first logical relationship.

[0021] According to the present invention, a method for detecting jamming of a main pump solenoid valve, wherein determining the second logical relationship between the first actual detection sub-pressure, the second actual detection sub-pressure, the third actual detection sub-pressure, the fourth actual detection sub-pressure, and a second preset value includes:

[0022] Calculate the third absolute value of the fourth difference between the first actual detection sub-pressure and the third actual detection sub-pressure;

[0023] Calculate the fourth absolute value of the fifth difference between the second actual detection sub-pressure and the fourth actual detection sub-pressure;

[0024] Calculate the sixth difference between the third absolute value and the fourth absolute value;

[0025] The fourth size relationship between the sixth difference and the second preset value is determined as the second logical relationship.

[0026] According to a method for detecting jamming in a main pump solenoid valve provided by the present invention, the method further includes: determining that the main pump solenoid valve is not jammed if each of the first logical relationship, the second logical relationship, the first size relationship, and the second size relationship conforms to the jamming detection logic.

[0027] According to the present invention, a method for detecting jamming of a main pump solenoid valve, before obtaining the first detection pressure of the front pump and the second detection pressure of the rear pump after the working machinery is started, further includes:

[0028] It was determined that the pilot oil circuit of the operating machine was not connected to the corresponding actuator.

[0029] According to the present invention, a method for detecting jamming in a main pump solenoid valve, after determining that the main pump solenoid valve is not jammed, further includes:

[0030] A preset current value is applied to the main pump, and it is determined that the pilot oil circuit and the actuator are connected.

[0031] The present invention also provides a main pump solenoid valve jamming detection device, comprising:

[0032] The first acquisition module is used to acquire the first initial pressure corresponding to the front pump of the main pump and the second initial pressure corresponding to the rear pump of the main pump when the working machinery is started.

[0033] The second acquisition module is used to acquire the first detection pressure of the front pump and the second detection pressure of the rear pump after the working machinery is started, wherein the first detection pressure and the second detection pressure are the actual detection pressures of the main pump under different working conditions.

[0034] The determination module is used to determine that the main pump solenoid valve is stuck if the logical relationship between the first initial pressure, the second initial pressure, the first detection pressure, and the second detection pressure does not conform to the preset stuck detection logic.

[0035] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the main pump solenoid valve jamming detection method as described above.

[0036] The present invention also provides a working machine, comprising: a main pump solenoid valve jamming detection device as described in any of the preceding claims, or a method for implementing the main pump solenoid valve jamming detection method as described in any of the preceding claims.

[0037] The present invention provides a method, apparatus, equipment, and operating machinery for detecting main pump solenoid valve jamming. It acquires a first initial pressure corresponding to the front pump of the main pump and a second initial pressure corresponding to the rear pump of the main pump when the operating machinery starts; and acquires a first detection pressure of the front pump and a second detection pressure of the rear pump after the operating machinery starts. The first and second detection pressures are the actual detection pressures of the main pump under different operating conditions. Therefore, the present invention acquires the initial pressure when the operating machinery starts and the actual detection pressures under different operating conditions after the operating machinery starts, both of which are the actual pressures of the main pump under normal operating conditions. Furthermore, if the logical relationship between the first initial pressure, the second initial pressure, the first detection pressure, and the second detection pressure does not conform to the preset jamming detection logic, it determines that the main pump solenoid valve is jammed. Thus, the present invention determines whether the main pump solenoid valve is jammed based on the actual pressure of the main pump, i.e., it judges based on the actual operating conditions of the main pump, without needing to consider the characteristics of the solenoid valve itself, avoiding misjudgments caused by differences in the solenoid valve, and achieving accurate determination of whether the solenoid valve is jammed. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in this 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 some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0039] Figure 1 This is one of the flowcharts of the main pump solenoid valve jamming detection method provided by the present invention;

[0040] Figure 2 This is the second flowchart of the main pump solenoid valve jamming detection method provided by the present invention;

[0041] Figure 3 This is a schematic diagram of the main pump solenoid valve jamming detection system provided by the present invention;

[0042] Figure 4 This is a schematic diagram of the main pump solenoid valve jamming detection device provided by the present invention;

[0043] Figure 5 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0045] The following is combined Figures 1 to 3 The present invention describes a method for detecting jamming of the main pump solenoid valve.

[0046] This invention provides a method for detecting the jamming of a main pump solenoid valve. This method can be applied to smart terminals, such as mobile phones, computers, and tablets, as well as servers and controllers of machinery. The following description uses the application of this method to a machinery controller as an example; however, it should be noted that this is merely illustrative and not intended to limit the scope of protection of this invention. Other descriptions in this invention are also illustrative and not intended to limit the scope of protection of this invention, and will not be described in detail thereafter. Figure 1 As shown, the method includes:

[0047] Step 101: Obtain the first initial pressure corresponding to the front pump of the main pump and the second initial pressure corresponding to the rear pump of the main pump when the working machinery starts.

[0048] Specifically, the engine of the working machinery is started, ensuring that the engine speed is greater than the preset speed, and without receiving an alarm signal, the first initial pressure corresponding to the front pump of the main pump and the second initial pressure corresponding to the rear pump of the main pump are acquired and recorded when the working machinery is started.

[0049] The preset speed can be 650 revolutions per minute (rpm), and the alarm signal is a signal indicating that the hydraulic oil return is blocked.

[0050] This invention ensures that the engine speed reaches a preset speed when starting the working machinery, so as to guarantee that the engine can start normally and provide a data basis for subsequent detection of jamming of the main pump solenoid valve.

[0051] Specifically, after obtaining the first initial pressure and the second initial pressure, it is determined whether both the first initial pressure and the second initial pressure are less than a preset pressure. If both the first initial pressure and the second initial pressure are determined to be less than the preset pressure, step 102 is executed; otherwise, the main pump solenoid valve jamming test operation is not performed. The preset pressure can be 30N.

[0052] Alternatively, when the engine starts, if it is determined that the engine speed is greater than the preset speed, no alarm signal is received, and both the first initial pressure and the second initial pressure are less than the preset pressure, the first initial pressure and the second initial pressure are acquired and recorded, and then step 102 is executed.

[0053] When starting the working machinery, this invention ensures that the engine speed reaches a preset speed and that both the first and second initial pressures are less than preset pressures. This ensures that the engine is not actually working at the start-up time under normal starting conditions, providing a data basis for subsequently giving the theoretical flow rate to the front and rear pumps to detect the sticking of the main pump solenoid valve.

[0054] This invention determines whether the working conditions of the machinery at startup meet the prerequisites for solenoid valve jamming detection. If the prerequisites are met, the solenoid valve jamming detection is further performed, ensuring the accuracy of the jamming detection results.

[0055] In one specific embodiment, after obtaining the first initial pressure and the second initial pressure, the pilot handle control circuit of the working machine is disconnected, that is, it is determined that the pilot oil circuit of the working machine is not connected to the corresponding actuator, ensuring that no pilot oil circuit participates in the operation, and preventing the working machine from being misoperated during the solenoid valve jamming detection process, which would lead to inaccurate detection results.

[0056] Step 102: Obtain the first detection pressure of the front pump and the second detection pressure of the rear pump after the working machinery is started.

[0057] The first and second detection pressures are the actual detection pressures of the main pump under different operating conditions.

[0058] The first detection pressure includes: the first actual detection sub-pressure corresponding to the front pump and the second actual detection sub-pressure corresponding to the rear pump; the second detection pressure includes: the third actual detection sub-pressure corresponding to the front pump and the fourth actual detection sub-pressure corresponding to the rear pump.

[0059] Specifically, different operating states are obtained by the controller outputting different currents.

[0060] Specifically, the controller assigns a first preset theoretical flow rate (e.g., a first operating state) to the front pump and the rear pump respectively, and obtains a first actual detection sub-pressure corresponding to the front pump and a second actual detection sub-pressure corresponding to the rear pump under the action of the first preset theoretical flow rate. Then, the controller assigns a second preset theoretical flow rate (e.g., a second operating state) to the front pump and the rear pump respectively, and obtains a third actual detection sub-pressure corresponding to the front pump and a fourth actual detection sub-pressure corresponding to the rear pump under the action of the second preset theoretical flow rate.

[0061] The second preset theoretical flow rate is greater than the first preset theoretical flow rate.

[0062] For example, given a theoretical flow rate of 20 L / min for both the front and rear pumps, the first actual detection sub-pressure corresponding to the front pump and the second actual detection sub-pressure corresponding to the rear pump are obtained. Then, given a theoretical flow rate of 80 L / min for both the front and rear pumps, the third actual detection sub-pressure corresponding to the front pump and the fourth actual detection sub-pressure corresponding to the rear pump are obtained.

[0063] Specifically, the controller can also apply a first preset current to the solenoid valves corresponding to the front pump and the rear pump, respectively, to obtain the first actual detection sub-pressure of the front pump and the second actual detection sub-pressure of the rear pump under the action of the first preset current. Furthermore, the controller can then apply a second preset current to the solenoid valves corresponding to the front pump and the rear pump, respectively, to obtain the third actual detection sub-pressure of the front pump and the fourth actual detection sub-pressure of the rear pump under the action of the second preset theoretical flow rate.

[0064] The second preset current is greater than the first preset current.

[0065] This invention monitors the actual pressure of the main pump under at least two different operating conditions of the machinery, providing an effective data basis for accurately predicting whether the solenoid valve is stuck.

[0066] Step 103: If the logical relationship between the first initial pressure, the second initial pressure, the first detection pressure, and the second detection pressure does not conform to the preset jamming detection logic, it is determined that the main pump solenoid valve is jammed.

[0067] In one specific embodiment, the method for determining that the main pump solenoid valve is stuck is as follows: determining a first logical relationship between a first actual detection sub-pressure, a second actual detection sub-pressure, a first initial pressure, a second initial pressure, and a first preset value; determining a second logical relationship between the first actual detection sub-pressure, the second actual detection sub-pressure, the third actual detection sub-pressure, the fourth actual detection sub-pressure, and the second preset value; determining a first magnitude relationship between the first actual detection sub-pressure and the third actual detection sub-pressure; determining a second magnitude relationship between the second actual detection sub-pressure and the fourth actual detection sub-pressure; and determining that the main pump solenoid valve is stuck if any one or more of the first logical relationship, the second logical relationship, the first magnitude relationship, and the second magnitude relationship do not conform to the stuck detection logic.

[0068] In one specific embodiment, determining the first logical relationship is specifically implemented as follows: calculating the first absolute value of the first difference between the first actual detection sub-pressure and the first initial pressure; calculating the second absolute value of the second difference between the second actual detection sub-pressure and the second initial pressure; calculating the third difference between the first absolute value and the second absolute value; and determining the third magnitude relationship between the third difference and the first preset value as the first logical relationship.

[0069] In one specific embodiment, determining the second logical relationship is specifically implemented as follows: calculating the third absolute value of the fourth difference between the first actual detection sub-pressure and the third actual detection sub-pressure; calculating the fourth absolute value of the fifth difference between the second actual detection sub-pressure and the fourth actual detection sub-pressure; calculating the sixth difference between the third absolute value and the fourth absolute value; and determining the fourth magnitude relationship between the sixth difference and the second preset value as the second logical relationship.

[0070] The jamming detection logic includes: the third difference is less than the first preset value, the sixth difference is less than the second preset value, the third actual detection sub-pressure is greater than the first actual detection sub-pressure, and the fourth actual detection sub-pressure is greater than the second actual detection sub-pressure.

[0071] Wherein, the first initial pressure is represented by p01, the second initial pressure by p02, the first actual detection sub-pressure by p1, the second actual detection sub-pressure by p2, the third actual detection sub-pressure by p3, the fourth actual detection sub-pressure by p4, the first preset value by A, and the second preset value by B.

[0072] Specifically, when |(p1 - p01)| - |(p2 - p02)| < A, |(p3 - p1)| - |(p4 - p2)| < B, p3 <= p1, and p4 > p2, it is determined that the solenoid valve of the front pump is stuck; when |(p1 - p01)| - |(p2 - p02)| < A, |(p3 - p1)| - |(p4 - p2)| < B, p3 > p1, and p4 <= p2, it is determined that the solenoid valve of the rear pump is stuck; when |(p1 - p01)| - |(p2 - p02)| < A, |(p3 - p1)| - |(p4 - p2)| < B, p3 <= p1, and p4 <= p2, it is determined that the solenoid valves of both the front pump and the rear pump are stuck.

[0073] The present invention determines whether the main pump solenoid valve of the working machine is stuck at the current moment through the stuck detection logic. If there is a stuck, an alarm message is sent, and the stuck fault is recorded and prompted. Otherwise, the working machine continues to run to ensure the normal operation of the working machine.

[0074] In a specific embodiment, when it is determined that each of the first logical relationship, the second logical relationship, the first size relationship, and the second size relationship conforms to the stuck detection logic, it is determined that the main pump solenoid valve is not stuck.

[0075] Specifically, when |(p1 - p01)| - |(p2 - p02)| < A, |(p3 - p1)| - |(p4 - p2)| < B, p3 > p1, and p4 > p2, it is determined that the main pump solenoid valve is not stuck.

[0076] In a specific embodiment, after it is determined that the main pump solenoid valve is not stuck, a preset current value is applied to the main pump to make the main pump continue to operate, and it is determined that the pilot oil circuit and the actuator are connected, so that the pilot handle control circuit is in a connected state.

[0077] Among them, the preset current value is the current value corresponding to the minimum displacement of the main pump.

[0078] Next, through Figure 2 the present invention is specifically described as follows:

[0079] Step 201, when the engine starts, when it is determined that the engine speed is greater than the preset speed, no alarm signal is received, and both the first initial pressure and the second initial pressure are less than the preset pressure, p01 and p02 are acquired and recorded.

[0080] Step 202, it is determined that the pilot handle control circuit is in an open state.

[0081] That is, the pilot oil circuit is not connected to the corresponding actuator.

[0082] Among them, the actuator includes a pilot handle.

[0083] Step 203: The forward pump and the rear pump operate at the first preset theoretical flow rate to obtain p1 and p2, and the forward pump and the rear pump operate at the second preset theoretical flow rate to obtain p3 and p4.

[0084] Step 204, determine |(p1-p01)|-|(p2-p02)| <A,|(p3-p1)|-|(p4-p2)|<B,p3> If p1 and p4 are both true, proceed to step 205; otherwise, proceed to step 206.

[0085] Step 205: The forward and rear pumps operate at minimum displacement, and the pilot handle control circuit is connected.

[0086] Among them, there is a corresponding relationship between the minimum displacement and the preset current value, and it is determined that the pilot oil circuit and the actuator are connected.

[0087] Step 206: Determine that the main pump solenoid valve is stuck and trigger a stuck alarm.

[0088] Specifically, if the pilot handle control circuit is connected during the solenoid valve jamming detection process, the solenoid valve jamming detection is stopped, that is, the judgment in step 204 is stopped.

[0089] A can be the same as or different from B; the user can determine the calibration based on the actual situation.

[0090] Below, through Figure 3 The application scenarios of this invention will be specifically described as follows:

[0091] Specifically, this invention can be understood to also provide a main pump solenoid valve jamming detection system, which includes: a vehicle controller 301, at least two proportional solenoid valves 302 and at least two pressure sensors 303.

[0092] Both the proportional solenoid valve 302 and the pressure sensor 303 are connected to the vehicle controller 301. At least one proportional solenoid valve 302 is connected to the front pump, and at least one other proportional solenoid valve 303 is connected to the rear pump.

[0093] At least one pressure sensor 303 is installed at the front pump to detect the pressure of the front pump; at least another pressure sensor 303 is installed after the rear pump to detect the pressure of the rear pump.

[0094] The vehicle controller 301 controls the proportional solenoid valve 302 to act on the front and rear pumps, and the pressure sensor 303 transmits the monitored pressure to the vehicle controller 301. The vehicle controller 301 is used to implement the main pump solenoid valve jamming detection method described in any of the above embodiments.

[0095] Among them, the proportional solenoid valve 302 is the solenoid valve and main pump solenoid valve mentioned in the instruction manual.

[0096] Among them, Figure 3 The following explanation uses two proportional solenoid valves 302 and two pressure sensors 303 as an example.

[0097] Specifically, the system also includes a display screen. When the vehicle controller 301 detects that the solenoid valve is stuck, it generates an alarm message and displays the alarm message on the display screen for the operator to view.

[0098] The main pump solenoid valve jamming detection method provided by this invention obtains the first initial pressure corresponding to the front pump of the main pump and the second initial pressure corresponding to the rear pump of the main pump when the operating machinery starts; and obtains the first detection pressure of the front pump and the second detection pressure of the rear pump after the operating machinery starts. The first and second detection pressures are the actual detection pressures of the main pump under different operating conditions. Therefore, the initial pressure obtained when the operating machinery starts and the actual detection pressures under different operating conditions after the operating machinery starts are both actual pressures of the main pump under normal operating conditions. Furthermore, if the logical relationship between the first initial pressure, the second initial pressure, the first detection pressure, and the second detection pressure does not conform to the preset jamming detection logic, it is determined that the main pump solenoid valve is jammed. Thus, this invention determines whether the main pump solenoid valve is jammed based on the actual pressure of the main pump, that is, based on the actual operating conditions of the main pump, without needing to consider the characteristics of the solenoid valve itself, avoiding misjudgments caused by differences in the solenoid valve, and achieving accurate determination of whether the solenoid valve is jammed.

[0099] The following describes the main pump solenoid valve jamming detection device provided by the present invention. The main pump solenoid valve jamming detection device described below can be referred to in correspondence with the main pump solenoid valve jamming detection method described above. Repeated points will not be elaborated upon. Figure 4 As shown, the device includes:

[0100] The first acquisition module 401 is used to acquire the first initial pressure corresponding to the front pump of the main pump and the second initial pressure corresponding to the rear pump of the main pump when the working machinery starts.

[0101] The second acquisition module 402 is used to acquire the first detection pressure of the front pump and the second detection pressure of the rear pump after the working machinery is started. The first detection pressure and the second detection pressure are the actual detection pressures of the main pump under different working conditions.

[0102] The determination module 403 is used to determine that the main pump solenoid valve is stuck if the logical relationship between the first initial pressure, the second initial pressure, the first detection pressure and the second detection pressure does not conform to the preset stuck detection logic.

[0103] In one specific embodiment, the first detection pressure includes: a first actual detection sub-pressure and a second actual detection sub-pressure; the second detection pressure includes: a third actual detection sub-pressure and a fourth actual detection sub-pressure; the determining module 403 is specifically used to determine a first logical relationship between the first actual detection sub-pressure, the second actual detection sub-pressure, the first initial pressure, the second initial pressure, and a first preset value; determine a second logical relationship between the first actual detection sub-pressure, the second actual detection sub-pressure, the third actual detection sub-pressure, the fourth actual detection sub-pressure, and the second preset value; determine a first magnitude relationship between the first actual detection sub-pressure and the third actual detection sub-pressure; determine a second magnitude relationship between the second actual detection sub-pressure and the fourth actual detection sub-pressure; and determine that the main pump solenoid valve is stuck if any one or more of the first logical relationship, the second logical relationship, the first magnitude relationship, and the second magnitude relationship do not conform to the sticking detection logic.

[0104] In one specific embodiment, the determining module 403 is specifically used to calculate the first absolute value of the first difference between the first actual detected sub-pressure and the first initial pressure; calculate the second absolute value of the second difference between the second actual detected sub-pressure and the second initial pressure; calculate the third difference between the first absolute value and the second absolute value; and determine the third magnitude relationship between the third difference and the first preset value as the first logical relationship.

[0105] In one specific embodiment, the determining module 403 is specifically used to calculate the third absolute value of the fourth difference between the first actual detection sub-pressure and the third actual detection sub-pressure; calculate the fourth absolute value of the fifth difference between the second actual detection sub-pressure and the fourth actual detection sub-pressure; calculate the sixth difference between the third absolute value and the fourth absolute value; and determine the fourth magnitude relationship between the sixth difference and the second preset value as the second logical relationship.

[0106] In one specific embodiment, the determining module 403 is further configured to determine that the main pump solenoid valve is not stuck if each of the first logical relationship, the second logical relationship, the first size relationship, and the second size relationship meets the stuck detection logic.

[0107] In one specific embodiment, the second acquisition module 402 is further configured to determine that the pilot oil circuit of the operating machinery is not connected to the corresponding execution component.

[0108] In one specific embodiment, the determining module 403 is further configured to apply a preset current value to the main pump and determine that the pilot oil circuit and the actuation component are connected.

[0109] This invention also provides a working machine, including a main pump solenoid valve jamming detection device as described in any of the above embodiments, or a device for implementing the main pump solenoid valve jamming detection method as described in any of the above embodiments.

[0110] The operating machinery includes excavators, cranes, concrete mixers, and pump trucks.

[0111] Figure 5 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 5 As shown, the electronic device may include: a processor 501, a communication interface 502, a memory 503, and a communication bus 504, wherein the processor 501, the communication interface 502, and the memory 503 communicate with each other through the communication bus 504. The processor 501 can call logical instructions in the memory 503 to execute a main pump solenoid valve jamming detection method. This method includes: acquiring a first initial pressure corresponding to the front pump of the main pump and a second initial pressure corresponding to the rear pump of the main pump when the working machinery starts; acquiring a first detection pressure of the front pump and a second detection pressure of the rear pump after the working machinery starts, wherein the first detection pressure and the second detection pressure are the actual detection pressures corresponding to the main pump under different operating states; and determining that the main pump solenoid valve is jammed if the logical relationship between the first initial pressure, the second initial pressure, the first detection pressure, and the second detection pressure does not conform to the preset jamming detection logic.

[0112] Furthermore, the logical instructions in the aforementioned memory 503 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0113] On the other hand, the present invention also provides a computer program product, the computer program product including a computer program stored on a non-transitory computer-readable storage medium, the computer program including program instructions, when the program instructions are executed by a computer, the computer can execute the main pump solenoid valve jamming detection method provided in the above embodiments, the method including: obtaining a first initial pressure corresponding to the front pump of the main pump and a second initial pressure corresponding to the rear pump of the main pump when the working machinery is started; obtaining a first detection pressure of the front pump and a second detection pressure of the rear pump after the working machinery is started, wherein the first detection pressure and the second detection pressure are the actual detection pressures corresponding to the main pump under different operating states; determining that the main pump solenoid valve is jammed when it is determined that the logical relationship between the first initial pressure, the second initial pressure, the first detection pressure and the second detection pressure does not conform to the preset jamming detection logic.

[0114] In another aspect, the present invention also provides a non-transitory computer-readable storage medium storing a computer program thereon. When executed by a processor, the computer program implements the main pump solenoid valve jamming detection method provided in the above embodiments. The method includes: acquiring a first initial pressure corresponding to the front pump of the main pump and a second initial pressure corresponding to the rear pump of the main pump when the working machinery is started; acquiring a first detection pressure of the front pump and a second detection pressure of the rear pump after the working machinery is started, wherein the first detection pressure and the second detection pressure are the actual detection pressures corresponding to the main pump under different operating states; and determining that the main pump solenoid valve is jammed when it is determined that the logical relationship between the first initial pressure, the second initial pressure, the first detection pressure, and the second detection pressure does not conform to the preset jamming detection logic.

[0115] The device 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 any creative effort.

[0116] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0117] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for detecting jamming of a main pump solenoid valve, characterized in that, include: Obtain the first initial pressure corresponding to the front pump of the main pump and the second initial pressure corresponding to the rear pump of the main pump when the working machinery starts; The first detection pressure of the front pump and the second detection pressure of the rear pump are obtained after the working machinery is started, wherein the first detection pressure and the second detection pressure are the actual detection pressures of the main pump under different working conditions; If the logical relationship between the first initial pressure, the second initial pressure, the first detection pressure, and the second detection pressure does not conform to the preset jamming detection logic, it is determined that the main pump solenoid valve is jammed.

2. The method for detecting jamming of the main pump solenoid valve according to claim 1, characterized in that, The acquisition of the first detection pressure of the front pump and the second detection pressure of the rear pump after the operating machinery is started includes: When the working machinery is in a first working state, the first actual detection sub-pressure corresponding to the front pump and the second actual detection sub-pressure corresponding to the rear pump are obtained; when the working machinery is in a second working state different from the first working state, the third actual detection sub-pressure corresponding to the front pump and the fourth actual detection sub-pressure corresponding to the rear pump are obtained. The step of determining that the main pump solenoid valve is stuck when the logical relationship between the first initial pressure, the second initial pressure, the first detection pressure, and the second detection pressure does not conform to the preset jamming detection logic includes: Determine a first logical relationship between the first actual detection sub-pressure, the second actual detection sub-pressure, the first initial pressure, the second initial pressure, and the first preset value; Determine a second logical relationship between the first actual detection sub-pressure, the second actual detection sub-pressure, the third actual detection sub-pressure, the fourth actual detection sub-pressure, and the second preset value; Determine a first magnitude relationship between the first actual detection sub-pressure and the third actual detection sub-pressure; Determine a second magnitude relationship between the second actual detection sub-pressure and the fourth actual detection sub-pressure; If any one or more of the first logical relationship, the second logical relationship, the first size relationship, and the second size relationship do not conform to the jamming detection logic, it is determined that the main pump solenoid valve is jammed.

3. The method for detecting sticking of the main pump solenoid valve according to claim 2, characterized in that, Determining the first logical relationship between the first actual detection sub-pressure, the second actual detection sub-pressure, the first initial pressure, the second initial pressure, and the first preset value includes: Calculate the first absolute value of the first difference between the first actual detection sub-pressure and the first initial pressure; Calculate the second absolute value of the second difference between the second actual detection sub-pressure and the second initial pressure; Calculate the third difference between the first absolute value and the second absolute value; The third size relationship between the third difference and the first preset value is determined as the first logical relationship.

4. The method for detecting jamming of the main pump solenoid valve according to claim 2, characterized in that, The determination of the second logical relationship between the first actual detection sub-pressure, the second actual detection sub-pressure, the third actual detection sub-pressure, the fourth actual detection sub-pressure, and the second preset value includes: Calculate the third absolute value of the fourth difference between the first actual detection sub-pressure and the third actual detection sub-pressure; Calculate the fourth absolute value of the fifth difference between the second actual detection sub-pressure and the fourth actual detection sub-pressure; Calculate the sixth difference between the third absolute value and the fourth absolute value; The fourth size relationship between the sixth difference and the second preset value is determined as the second logical relationship.

5. The method for detecting sticking of the main pump solenoid valve according to claim 2, characterized in that, The method further includes: determining that the main pump solenoid valve is not stuck if each of the first logical relationship, the second logical relationship, the first size relationship, and the second size relationship meets the jamming detection logic.

6. The method for detecting sticking of the main pump solenoid valve according to any one of claims 1-5, characterized in that, Before obtaining the first detection pressure of the front pump and the second detection pressure of the rear pump after the operating machinery is started, the method further includes: It was determined that the pilot oil circuit of the operating machine was not connected to the corresponding actuator.

7. The method for detecting sticking of the main pump solenoid valve according to claim 6, characterized in that, After confirming that the main pump solenoid valve is not stuck, the process also includes: A preset current value is applied to the main pump, and it is determined that the pilot oil circuit and the actuator are connected.

8. A main pump solenoid valve jamming detection device, characterized in that, include: The first acquisition module is used to acquire the first initial pressure corresponding to the front pump of the main pump and the second initial pressure corresponding to the rear pump of the main pump when the working machinery is started. The second acquisition module is used to acquire the first detection pressure of the front pump and the second detection pressure of the rear pump after the working machinery is started, wherein the first detection pressure and the second detection pressure are the actual detection pressures of the main pump under different working conditions. The determination module is used to determine that the main pump solenoid valve is stuck if the logical relationship between the first initial pressure, the second initial pressure, the first detection pressure, and the second detection pressure does not conform to the preset stuck detection logic.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the main pump solenoid valve jamming detection method as described in any one of claims 1 to 7.

10. A type of operating machinery, characterized in that, Includes the main pump solenoid valve jamming detection device as described in claim 8, or is used to implement the main pump solenoid valve jamming detection method as described in any one of claims 1-7.

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