Control method, processor and crane for a crane

Abstract

The application relates to the technical field of engineering machinery, and discloses a control method for a crane, a processor and the crane. The crane comprises a one-key start-stop main switch, a first handle enabling switch, a second handle enabling switch and a working motor; the method comprises the following steps: controlling the crane to be powered on; obtaining the states of the one-key start-stop main switch, the first handle enabling switch and the second handle enabling switch; in the case that the state of the one-key start-stop main switch is on, and the state of at least one of the first handle enabling switch and the second handle enabling switch is on, controlling the working motor to start, so as to execute the action of an action mechanism corresponding to the working motor. The starting of the working motor is irrelevant to a contactor inside a working motor controller, so the impact on electrical control components and lines in the crane is small, the probability of burning the electrical control components and lines is reduced, the service life of the electrical control components and lines is prolonged, and the use safety of the crane is improved.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, and more specifically to a control method, processor, and crane for use in cranes. Background Technology

[0002] Currently, the crane's working motor is started and stopped using the ignition key switch in the operator's cab. To start the working motor, the ignition key switch is turned from the ON position to the START position. This activates the contactor inside the working motor controller, outputting three-phase AC power, and the working motor starts. Releasing the ignition key switch returns it to the ON position. Conversely, to stop the working motor, the ignition key switch is turned from the ON position to the OFF position. This disconnects the contactor inside the working motor controller, cutting off the three-phase AC power output, and the working motor stops operating.

[0003] Taking an all-terrain crane as an example, under normal circumstances, the operation time of an all-terrain crane is not continuous. If there is no lifting operation for a long time, in order to save vehicle energy, the working motor needs to be turned off. When lifting operation is required again, the working motor needs to be restarted. This requires the operator to frequently turn the ignition key switch. The working motor has a large power and a correspondingly large operating current. The frequent opening and closing of the contactor inside the working motor controller has a significant impact on the electrical control components and wiring inside the crane, which may affect their service life and even cause the electrical control components and wiring to burn out, leading to vehicle failure and safety accidents, resulting in low safety. Summary of the Invention

[0004] To overcome the shortcomings of the existing technology, embodiments of the present invention provide a control method, processor and crane for a crane.

[0005] To achieve the above objectives, a first aspect of the present invention provides a control method for a crane, the crane comprising: a one-button start / stop main switch, a first handle enable switch, a second handle enable switch, and a working motor; the method comprising:

[0006] Control the power supply to the crane;

[0007] Get the status of the one-button start / stop master switch, the left handle enable switch, and the right handle enable switch;

[0008] When the one-button start / stop master switch is in the ON state, and at least one of the first handle enable switch and the second handle enable switch is in the ON state, the working motor is controlled to start, so as to execute the action of the corresponding action mechanism of the working motor.

[0009] In this embodiment of the invention, the crane further includes a variable frequency speed control device, and the method further includes:

[0010] The crane's working pressure is obtained when the main start / stop switch is on, the first handle enable switch is off, and the second handle enable switch is off.

[0011] If the working pressure is lower than the preset pressure and the duration of the lower pressure exceeds the first preset duration, the frequency of the three-phase electricity in the crane is adjusted to the preset frequency using a variable frequency speed control device to shut down the working motor.

[0012] In this embodiment of the invention, the working motor is a hoisting working motor;

[0013] The actuator includes at least one of the following: main winch, auxiliary winch, turntable, and boom;

[0014] The actions of the actuator include at least one of the following: the lifting and lowering action of the auxiliary winch, the slewing action of the turntable, the lifting and lowering action of the main winch, the luffing action of the boom, and the telescopic action of the boom.

[0015] In this embodiment of the invention, the crane further includes:

[0016] The first pressure sensor is located at the output end of the working valve corresponding to the main winch.

[0017] The second pressure sensor is located at the output end of the working valve corresponding to the auxiliary winch.

[0018] The third pressure sensor is located at the output end of the working valve corresponding to the turntable;

[0019] The fourth pressure sensor is located at the output end of the working valve corresponding to the boom;

[0020] Obtaining the crane's working pressure includes:

[0021] The first working pressure of the first pressure sensor, the second working pressure of the second pressure sensor, the third working pressure of the third pressure sensor, and the fourth working pressure of the fourth pressure sensor are obtained.

[0022] The following situations occur when the working pressure is lower than the preset pressure, and the duration of the lower pressure exceeds the first preset duration:

[0023] When the first working pressure, the second working pressure, the third working pressure, and the fourth working pressure are all lower than the preset pressure, and the duration of the pressure being lower than the preset pressure exceeds the first preset duration.

[0024] In this embodiment of the invention, the crane further includes: a first handle and a second handle, wherein a first handle enable switch is disposed on the first handle and a second handle enable switch is disposed on the second handle.

[0025] In this embodiment of the invention, the crane also includes a key switch and a contactor disposed inside the working motor controller corresponding to the working motor;

[0026] Controlling the power supply to the crane includes:

[0027] Turn the control key switch from the OFF position to the ON position to power on the crane;

[0028] The method also includes:

[0029] When the main start / stop switch is off, the key switch is turned from the ON position to the START position, the key switch is in the START position for a duration exceeding the second preset duration, and the contactor is off, the control contactor is turned on to start the working motor.

[0030] When the main start / stop switch is in the off position and the key switch is turned from the ON position to the OFF position, the control contactor will disconnect to shut down the operating motor.

[0031] In this embodiment of the invention, the method further includes:

[0032] When the main start / stop switch is in the ON state and the contactor is in the OFF state, the control contactor is turned on.

[0033] A second aspect of the present invention provides a processor configured to execute the above-described control method for a crane.

[0034] A third aspect of the present invention provides a crane, comprising: a one-button start / stop main switch, a first handle enable switch, a second handle enable switch, and a working motor; and

[0035] The processor mentioned above.

[0036] In this embodiment of the invention, the crane includes an electric all-terrain tire crane.

[0037] When the main start / stop switch is in the ON state, the one-button start / stop function of the working motor is activated. If the crane is powered on at this time, simply turning on at least one of the first and second handle enable switches will start the working motor, enabling the corresponding action mechanism to operate. In this embodiment, the starting and stopping of the working motor is independent of the contactor inside the working motor controller. For example, the contactor can be omitted, or it can remain in the ON state. This prevents frequent contactor disconnection and reconnection when the working motor needs to be started frequently. The working motor controller automatically controls the starting of the working motor based on the logical states of the main start / stop switch, the first handle enable switch, and the second handle enable switch. This minimizes the impact on the electrical control components and wiring within the crane, significantly reducing the probability of burnout, extending their lifespan, and improving the crane's operational safety. Attached Figure Description

[0038] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0039] Figure 1 This schematic diagram illustrates the control circuit diagram of a working motor in the prior art;

[0040] Figure 2 A schematic diagram of the control circuit of the working motor according to an embodiment of the present invention is shown.

[0041] Figure 3 A flowchart illustrating a control method for a crane according to an embodiment of the present invention is shown schematically;

[0042] Figure 4 The schematic diagram illustrates the control flow chart for starting and stopping the operating motor according to an embodiment of the present invention.

[0043] Explanation of reference numerals in the attached figures

[0044] S1 - Key switch; 10 - Contactor;

[0045] 11-Working motor controller; 12-Working motor;

[0046] S2 - One-button start / stop master switch; S3 - First handle enable switch;

[0047] S4 - Second handle enable switch; 13 - Variable frequency speed control device. Detailed Implementation

[0048] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0049] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0050] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0051] To better understand the beneficial effects of the control method for cranes provided in the embodiments of the present invention, an example of the control method for starting and stopping the working motor 12 of a crane in the prior art will be given first. Figure 1 This schematic diagram illustrates the control circuit diagram of a working motor in the prior art, see below. Figure 1 , Figure 1 The main components involved are key switch S1, contactor 10, working motor controller 11 and working motor 12. For example, contactor 10 can be KM1 contactor and working motor 12 can be hoisting working motor.

[0052] In the prior art, the starting and stopping of the working motor 12 is controlled by the ignition key switch (i.e., key switch S1) in the crane operator's cab. To start the working motor 12, the key switch S1 is turned from the ON position to the START position, energizing the contactor 10 inside the working motor controller 11 and outputting three-phase AC power, thus starting the working motor 12. After releasing the key switch S1, it returns to the ON position. Conversely, to stop the working motor 12, the key switch S1 is turned from the ON position to the OFF position, disengaging the contactor 10 and cutting off the three-phase AC power output, thus stopping the working motor 12.

[0053] Taking an all-terrain crane as an example, under normal circumstances, the operation time of an all-terrain crane is not continuous. If there is no lifting operation for a long time, in order to save vehicle energy, the working motor 12 needs to be turned off. When lifting operation is needed again, the working motor 12 needs to be restarted. At this time, the operator needs to frequently turn the key switch S1. In the existing technology, the starting and stopping of the working motor 12 are entirely controlled by the key switch S1. The working motor 12 has a large power and a correspondingly large operating current. The frequent opening and closing of the contactor 10 inside the working motor controller 11 has a significant impact on the electrical control components and wiring inside the crane, which may affect their service life and even cause the electrical control components and wiring to burn out, leading to vehicle failure and safety accidents, resulting in low safety.

[0054] To overcome the shortcomings of existing technologies, this invention provides a control method for a crane. Before proceeding, the control circuit diagram of the working motor 12 in this embodiment is first introduced. Figure 2 A schematic diagram of the control circuit of the working motor according to an embodiment of the present invention is shown. (See also...) Figure 2 The crane includes: a one-button start / stop main switch S2, a first handle enable switch S3, a second handle enable switch S4, and a working motor 12. For example, the first handle enable switch S3 may be a left handle enable switch, and the second handle enable switch S4 may be a right handle enable switch S4.

[0055] Figure 3 A flowchart illustrating a control method for a crane according to an embodiment of the present invention is shown schematically. Figure 3 As shown, in one embodiment of the present invention, a control method for a crane is provided, comprising the following steps:

[0056] Step 301: Power on the crane;

[0057] Step 302: Obtain the status of the one-button start / stop master switch S2, the first handle enable switch S3, and the second handle enable switch S4;

[0058] Step 303: When the one-button start / stop master switch S2 is in the on state, and at least one of the first handle enable switch S3 and the second handle enable switch S4 is in the on state, the working motor 12 is controlled to start, so as to execute the action of the action mechanism corresponding to the working motor 12.

[0059] See also Figure 2The one-button start / stop main switch S2, the left handle enable switch S3, and the right handle enable switch S4 are connected to the work motor controller 11. The work motor controller 11 controls the output of the three-phase AC power corresponding to the work motor 12 through logic operations. In one embodiment, both the first handle enable switch S3 and the second handle enable switch S4 are connected to the hydraulic pilot solenoid valve of the crane. The hydraulic pilot solenoid valve is turned on by the first handle enable switch S3 and / or the second handle enable switch S4, and then the corresponding action mechanism is executed.

[0060] When the one-button start / stop master switch S2 is in the ON state, the one-button start / stop function of the working motor 12 is activated. If the crane is powered on at this time, simply turning on at least one of the first handle enable switch S3 and the second handle enable switch S4 will start the working motor 12, thereby executing the corresponding action mechanism. In this embodiment of the invention, the starting and stopping of the working motor 12 is independent of the contactor 10 inside the working motor controller. For example, the contactor 10 can be omitted, or it can remain in the ON state. This prevents frequent opening and closing of the contactor 10 when the working motor 12 needs to be started frequently. The working motor controller 11 automatically controls the starting of the working motor 12 based on the logic states of the one-button start / stop master switch S2, the first handle enable switch S3, and the second handle enable switch S4. This minimizes the impact on the electrical control components and wiring within the crane, significantly reducing the probability of burnout, extending their service life, and improving the safety of the crane.

[0061] In one embodiment, the crane further includes a variable frequency speed control device 13, and the method further includes: when the state of the one-button start / stop main switch S2 is on, the state of the first handle enable switch S3 is off, and the state of the second handle enable switch S4 is off, the working pressure of the crane is obtained; when the working pressure is lower than the preset pressure and the duration of the lower than the preset pressure exceeds the first preset duration, the frequency of the three-phase power in the crane is adjusted to the preset frequency by the variable frequency speed control device 13 to shut down the working motor 12.

[0062] The signal from the pressure sensor is also introduced into the working motor controller 11. Figure 4 This schematically illustrates a control flowchart for starting and stopping a working motor according to an embodiment of the present invention. (See also...) Figure 4The preset pressure can be 5 bar, and the first preset duration can be 5 seconds. If the crane's working pressure remains below 5 bar within the 5-second timeframe, it indicates that the crane is not performing any operations and has no power output requirement. In this case, the working motor 12 can be automatically shut down. If the one-button start / stop main switch S2 is on, the first handle enable switch S3 is off, and the second handle enable switch S4 is off, and the crane's working pressure does not fall below the preset pressure or the duration of the pressure being below the preset pressure does not exceed the first preset duration, then the working motor 12 remains in the start state.

[0063] In one embodiment, the crane further includes: a first handle and a second handle, wherein a first handle enable switch S3 is disposed on the first handle and a second handle enable switch S4 is disposed on the second handle. The first handle may be a left handle and the second handle may be a right handle; the first handle enable switch S3 may be a left handle enable switch and the second handle enable switch S4 may be a right handle enable switch.

[0064] Since the left handle enable switch is located on the left handle and the right handle enable switch is located on the right handle, when the one-button start / stop function is activated, the operator can easily and naturally trigger the left and / or right handle enable switches simultaneously when gripping the left and / or right handles to control the motion mechanism. This allows for successful control of the motion mechanism without the operator needing to specifically locate or trigger the left and / or right handle enable switches, greatly facilitating operation and saving time.

[0065] In one embodiment, the working motor 12 is a hoisting motor. The actuating mechanism includes a main winch, an auxiliary winch, a turntable, and a boom. The left handle can be used to operate the lifting action of the auxiliary winch and the slewing action of the turntable, while the right handle can be used to operate the lifting action of the main winch, the luffing action of the boom, and the telescopic action of the boom. When the one-button start / stop main switch S2 is in the ON state, and at least one of the first handle enable switch S3 and the second handle enable switch S4 is in the ON state, the working motor 12 starts, and then the operator can operate the first handle and / or the second handle to perform at least one of the following actions: the lifting action of the auxiliary winch, the slewing action of the turntable, the lifting action of the main winch, the luffing action of the boom, and the telescopic action of the boom. These actions are the main actions involved in crane hoisting operations.

[0066] In this embodiment of the invention, the left handle enable switch is located on the left handle (specifically, it can be located at the handle of the left handle), and the right handle enable switch is located on the right handle (specifically, it can be located at the handle of the right handle). When the one-button start / stop master switch S2 is in the on state, the one-button start / stop function is activated. At this time, if the operator grasps the left handle and / or the right handle to control the movement of the actuator, the left handle enable switch and / or the right handle enable switch will be activated naturally and simultaneously, and the hoisting operation motor 12 will be started. If the operator releases the left and right handles, the left handle enable switch and the right handle enable switch will be deactivated naturally and simultaneously, and the operation motor 12 will be automatically shut down according to the working pressure of the crane. This greatly facilitates the use and operation of the operator. For example, the setting of contactor 10 can be canceled, or contactor 10 can always be in the on state. The work motor controller 11 automatically controls the start and stop of work motor 12 according to the logic state of the one-button start / stop main switch S2, the left handle enable switch and the right handle enable switch.

[0067] Contactor 10 can be a KM1 contactor. As an example, the KM1 contactor is always in the ON state. When the one-button start / stop function is activated, instead of directly disconnecting the KM1 contactor inside the working motor controller 11 to cut off the three-phase AC power (which can be simply referred to as three-phase power), the contacts of the KM1 contactor are kept in the OFF state (i.e., ON state). The frequency converter 13 inside the working motor controller 11 controls the frequency of the three-phase AC power (for example, controlling the frequency to 0) to shut down the working motor 12. This avoids frequent opening and closing of the KM1 contactor contacts, preventing damage to electrical control components and wiring, and improving the safety of crane operation.

[0068] In one embodiment, the crane further includes:

[0069] The first pressure sensor is located at the output end of the working valve corresponding to the main winch.

[0070] The second pressure sensor is located at the output end of the working valve corresponding to the auxiliary winch.

[0071] The third pressure sensor is located at the output end of the working valve corresponding to the turntable;

[0072] The fourth pressure sensor is located at the output end of the working valve corresponding to the boom;

[0073] Obtaining the crane's working pressure includes: obtaining the first working pressure from the first pressure sensor, the second working pressure from the second pressure sensor, the third working pressure from the third pressure sensor, and the fourth working pressure from the fourth pressure sensor;

[0074] The situation where the working pressure is lower than the preset pressure and the duration of the lower pressure exceeds the first preset duration includes the situation where the first working pressure, the second working pressure, the third working pressure and the fourth working pressure are all lower than the preset pressure and the duration of the lower pressure exceeds the first preset duration.

[0075] In one embodiment, the crane further includes a key switch S1 and a contactor 10 disposed inside the work motor controller 11 corresponding to the work motor;

[0076] Controlling the power supply to the crane includes:

[0077] Turn the control key switch from the OFF position to the ON position to power on the crane;

[0078] The method also includes: when the state of the one-button start / stop main switch S2 is off, the state of the key switch S1 is turned from the ON position to the START position, the duration of the key switch S1 in the START position exceeds the second preset duration, and the state of the contactor is off, controlling the contactor 10 to turn on to start the working motor 12.

[0079] When the main start / stop switch S2 is in the off position and the key switch S1 is turned from the ON position to the OFF position, the control contactor 10 is disconnected to shut down the working motor 12.

[0080] When the main start / stop switch S2 is in the off state, the one-button start / stop function of the working motor 12 is disabled. At this time, the start and stop of the working motor 12 can be controlled by the key switch S1. For example, the second preset duration can be 1 second. When the key switch S1 is turned from the OFF position to the ON position, the crane's electrical system is powered on. When the PLC (Programmable Logic Controller) detects that the main start / stop switch S2 is off, the key switch S1 is turned from the ON position to the START position, and the duration of the Start signal exceeds 1 second (i.e., the duration of the key switch S1 in the START position exceeds the second preset duration), the working motor 12 starts running. In this embodiment of the invention, a validity detection function for the key switch Start signal is added. Only when the duration of the Start signal exceeds the second preset duration is the Start signal considered valid, thus preventing the key switch S1 from being accidentally triggered.

[0081] In one embodiment, the method further includes: when the state of the one-button start / stop main switch S2 is on and the state of the contactor 10 is off, controlling the contactor 10 to turn on.

[0082] If the one-button start / stop main switch S2 is in the ON state, then the contactor 10 can always be in the ON state. The working motor controller 11 automatically controls the start and stop of the working motor 12 according to the logic state of the first handle enable switch S3 and the second handle enable switch S4, so that the contactor 10 will not frequently disconnect and connect.

[0083] As can be seen, contactor 10 will only disconnect when the main start / stop switch S2 is in the off position and the key switch S1 is turned from the ON position to the OFF position. In other cases, contactor 10 can remain in the on position. This prevents frequent disconnection and connection of contactor 10 when the working motor 12 needs to be started frequently. The impact on the electrical control components and circuits inside the crane is smaller, which greatly reduces the probability of burnout of electrical control components and circuits, improves their service life, and enhances the safety of crane operation.

[0084] In this embodiment of the invention, a one-button start / stop master switch S2 is added. When the operator needs to use the one-button start / stop function, the one-button start / stop master switch S2 can be turned on; when the one-button start / stop function is not needed, the one-button start / stop master switch S2 can be turned off, and then the crane's normal start / stop operation can be restored (the start and stop of the working motor 12 can be controlled by the key switch S1).

[0085] In this embodiment of the invention, a one-button start / stop function is introduced for lifting operations where the operation time is discontinuous or the lifting operation is not carried out for a long time and the operation motor 12 needs to be frequently started and stopped. This not only saves the energy consumption of the crane, but also reduces the instantaneous start and stop current surge of the operation motor 12 due to frequent start and stop, extends the service life of the operation motor 12 and other components, and avoids the occurrence of dangerous accidents.

[0086] This invention provides a processor configured to execute any of the control methods for cranes described in the above embodiments.

[0087] The crane includes: a one-button start / stop main switch, a first handle enable switch, a second handle enable switch, and a working motor;

[0088] Specifically, the processor can be configured as follows:

[0089] Control the power supply to the crane;

[0090] Get the status of the one-button start / stop master switch, the first handle enable switch, and the second handle enable switch;

[0091] When the one-button start / stop master switch is in the ON state, and at least one of the first handle enable switch and the second handle enable switch is in the ON state, the working motor is controlled to start, so as to execute the action of the corresponding action mechanism of the working motor.

[0092] In this embodiment of the invention, the crane further includes a variable frequency speed control device, and the processor is further configured to:

[0093] The crane's working pressure is obtained when the main start / stop switch is on, the first handle enable switch is off, and the second handle enable switch is off.

[0094] If the working pressure is lower than the preset pressure and the duration of the lower pressure exceeds the first preset duration, the frequency of the three-phase electricity in the crane is adjusted to the preset frequency using a variable frequency speed control device to shut down the working motor.

[0095] In this embodiment of the invention, the working motor is a hoisting working motor;

[0096] The actuator includes at least one of the following: a main winch, an auxiliary winch, a turntable, and a boom; the processor is also configured to:

[0097] The actions of the actuator include at least one of the following: the lifting and lowering action of the auxiliary winch, the slewing action of the turntable, the lifting and lowering action of the main winch, the luffing action of the boom, and the telescopic action of the boom.

[0098] In this embodiment of the invention, the crane further includes:

[0099] The first pressure sensor is located at the output end of the working valve corresponding to the main winch.

[0100] The second pressure sensor is located at the output end of the working valve corresponding to the auxiliary winch.

[0101] The third pressure sensor is located at the output end of the working valve corresponding to the turntable;

[0102] The fourth pressure sensor is located at the output end of the working valve corresponding to the boom;

[0103] The processor is also configured to:

[0104] Obtaining the crane's working pressure includes:

[0105] The first working pressure of the first pressure sensor, the second working pressure of the second pressure sensor, the third working pressure of the third pressure sensor, and the fourth working pressure of the fourth pressure sensor are obtained.

[0106] The following situations occur when the working pressure is lower than the preset pressure, and the duration of the lower pressure exceeds the first preset duration:

[0107] When the first working pressure, the second working pressure, the third working pressure, and the fourth working pressure are all lower than the preset pressure, and the duration of the pressure being lower than the preset pressure exceeds the first preset duration.

[0108] In this embodiment of the invention, the crane further includes: a first handle and a second handle, wherein a first handle enable switch is disposed on the first handle and a second handle enable switch is disposed on the second handle.

[0109] In this embodiment of the invention, the crane also includes a key switch and a contactor disposed inside the working motor controller corresponding to the working motor;

[0110] The processor is configured as follows:

[0111] Controlling the power supply to the crane includes:

[0112] Turn the control key switch from the OFF position to the ON position to power on the crane;

[0113] The processor is also configured to:

[0114] When the main start / stop switch is off, the key switch is turned from ON to START, the key switch is in START position for a duration exceeding the second preset duration, and the contactor is off, the control contactor is turned on to start the working motor.

[0115] When the main start / stop switch is in the off position and the key switch is turned from the ON position to the OFF position, the control contactor will disconnect to shut down the operating motor.

[0116] In this embodiment of the invention, the processor is further configured to:

[0117] When the main start / stop switch is in the ON state and the contactor is in the OFF state, the control contactor is turned on.

[0118] This invention provides a crane, comprising: a one-button start / stop main switch, a first handle enable switch, a second handle enable switch, and a working motor; and

[0119] The processor mentioned above.

[0120] In this embodiment of the invention, the crane includes an electric all-terrain tire crane.

[0121] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0122] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0123] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0124] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0125] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0126] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0127] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0128] It should also be noted that 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 process, method, article, or apparatus. Unless otherwise specified, 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 that element.

[0129] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A control method for a crane, characterized in that, The crane includes: a one-button start / stop main switch, a first handle enable switch, a second handle enable switch, and a working motor; the method includes: Control the power supply of the crane; Obtain the status of the one-button start / stop master switch, the first handle enable switch, and the second handle enable switch; When the one-button start / stop master switch is in the ON state, and at least one of the first handle enable switch and the second handle enable switch is in the ON state, the working motor is controlled to start, so as to execute the action of the corresponding action mechanism of the working motor. The method further includes: When the one-button start / stop master switch is in the on state, the first handle enable switch is in the off state, and the second handle enable switch is in the off state, the working pressure of the crane is obtained; If the working pressure is lower than the preset pressure and the duration of the pressure being lower than the preset pressure exceeds a first preset duration, the frequency of the three-phase electricity in the crane is adjusted to the preset frequency using a variable frequency speed control device to shut down the working motor.

2. The method according to claim 1, characterized in that, The operating motor is a hoisting operating motor; The actuating mechanism includes at least one of the following: main winch, auxiliary winch, turntable, and boom; The actions of the actuation mechanism include at least one of the following: the lifting action of the auxiliary winch, the slewing action of the turntable, the lifting action of the main winch, the luffing action of the boom, and the telescopic action of the boom.

3. The method according to claim 2, characterized in that, The crane also includes: The first pressure sensor is located at the output end of the working valve corresponding to the main winch; The second pressure sensor is located at the output end of the working valve corresponding to the auxiliary winch; The third pressure sensor is located at the output end of the working valve corresponding to the turntable; The fourth pressure sensor is located at the output end of the working valve corresponding to the boom; The process of obtaining the working pressure of the crane includes: The first working pressure of the first pressure sensor, the second working pressure of the second pressure sensor, the third working pressure of the third pressure sensor, and the fourth working pressure of the fourth pressure sensor are obtained. The situation where the working pressure is lower than the preset pressure and the duration of the lower pressure exceeds a first preset duration includes: When the first working pressure, the second working pressure, the third working pressure, and the fourth working pressure are all lower than the preset pressure, and the duration of the pressure being lower than the preset pressure exceeds the first preset duration.

4. The method according to claim 1, characterized in that, The crane further includes: a first handle and a second handle, wherein the first handle enable switch is disposed on the first handle and the second handle enable switch is disposed on the second handle.

5. The method according to claim 1, characterized in that, The crane also includes a key switch and a contactor located inside the working motor controller corresponding to the working motor; The process of controlling the power supply of the crane includes: Control the key switch to turn from the OFF position to the ON position to power on the crane; The method further includes: When the one-button start / stop master switch is in the off state, the key switch is turned from the ON position to the START position, the key switch is in the START position for a duration exceeding a second preset duration, and the contactor is in the off state, the contactor is controlled to be turned on to start the working motor. When the main start / stop switch is in the off position and the key switch is turned from the ON position to the OFF position, the contactor is controlled to disconnect to shut down the working motor.

6. The method according to claim 5, characterized in that, The method further includes: When the main start / stop switch is in the ON state and the contactor is in the OFF state, control the contactor to turn on.

7. A processor, characterized in that, It is configured to perform the control method for a crane according to any one of claims 1 to 6.

8. A crane, characterized in that, include: One-button start / stop main switch, first handle enable switch, second handle enable switch, and working motor; as well as The processor according to claim 7.

9. The crane according to claim 8, characterized in that, The cranes include electric off-road tire cranes.

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