CN111799788A - Power-off control system, engineering machinery and power-off control method - Google Patents
Power-off control system, engineering machinery and power-off control method Download PDFInfo
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- CN111799788A CN111799788A CN202010673480.3A CN202010673480A CN111799788A CN 111799788 A CN111799788 A CN 111799788A CN 202010673480 A CN202010673480 A CN 202010673480A CN 111799788 A CN111799788 A CN 111799788A
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Abstract
The application provides a power failure control system, engineering machinery and a power failure control method, and relates to the technical field of engineering machinery. This outage control system includes: the device comprises a controller, a starting switch, a power supply and a power supply relay; the controller is electrically connected with the starting switch to obtain a power-on signal of the starting switch, and the preset timer is started based on the power-on signal; the controller is electrically connected with the power supply relay so as to control the power supply relay to be closed based on the electrifying signal, so that the power supply supplies power to the electrical components; the controller is also electrically connected with an engine of the engineering machinery to obtain a starting state signal of the engine, and determines whether a preset power-off condition is met or not according to the time of the timer and the starting state signal, if so, the power supply relay is controlled to be switched off to power off the electrical components. The automatic power-off system can realize the automatic power-off of the whole engineering machine and avoid starting faults.
Description
Technical Field
The application relates to the technical field of engineering machinery, in particular to a power failure control system, engineering machinery and a power failure control method.
Background
With the development of science and technology, the functions of the engineering machinery are more and more, and the electrical components on the engineering machinery are more and more.
Most of the existing engineering machines directly supply power to and control electrical components mainly through keys or start buttons. Namely, the power-on and power-off of the whole machine motor part of the engineering machinery are triggered by a user through a key or a starting button.
However, once the user forgets to power off the electrical components by using the key or the start button after the electrical components of the whole device are powered on, the power supply is easily lack of power, and a failure that the electrical components cannot be started is caused.
Disclosure of Invention
An object of the application is to the not enough among the above-mentioned prior art, provide a outage control system, engineering machine tool and outage control method to realize the auto-power-off of electrical component among the engineering machine tool, avoid the power shortage, guarantee engineering machine tool's normal start.
In order to achieve the above purpose, the technical solutions adopted in the embodiments of the present application are as follows:
in a first aspect, an embodiment of the present application provides a power failure control system for a construction machine, including: the device comprises a controller, a starting switch, a power supply and a power supply relay;
the controller is electrically connected with the starting switch to obtain a power-on signal of the starting switch, and a preset timer is started based on the power-on signal;
the power supply relay is electrically connected between the power supply and an electrical component of the engineering machinery, and the controller is also electrically connected with the power supply relay so as to control the power supply relay to be closed based on the power-on signal, so that the power supply supplies power to the electrical component;
the controller is further electrically connected with an engine of the engineering machinery to obtain a starting state signal of the engine, and determines whether a preset power-off condition is met or not according to the time of the timer and the starting state signal, if so, the power supply relay is controlled to be switched off to power off the electrical component.
Optionally, the power supply is further electrically connected to the start switch to supply power to the controller based on the power-on signal.
Optionally, the power outage control system further includes: and the display screen is in communication connection with the controller.
Optionally, the starting switch is a starting switch of a one-key starting button, or a key starting switch.
In a second aspect, an applied embodiment provides a work machine, including: the power outage control system, the engine and the electrical component of any of the above first aspects;
wherein the power supply relay in the power-off control system is electrically connected to the electrical component; the controller in the power-off control system is electrically connected with the engine.
In a third aspect, an embodiment of the present application provides a power outage control method for a construction machine, where the method is applied to any one of the power outage control systems in the first aspect, and the method includes:
controlling the power supply relay to be closed according to the power-on signal of the starting switch, so that the power supply supplies power to the electrical component, and starting a preset timer;
determining whether a preset power-off condition is met or not according to the time of the timer and the starting state signal;
and if so, controlling the power supply relay to be switched off so as to cut off the power of the electrical component.
Optionally, the determining whether a preset power-off condition is met according to the time of the timer and the start state signal includes:
detecting whether the engine is in a starting state or a non-starting state according to the starting state signal;
and if the engine is in an un-started state and the time of the timer reaches the set time, determining that a power-off condition is met.
Optionally, the method further includes:
and if the engine is in a starting state and the time of the timer does not reach the set time, carrying out zero clearing treatment on the timer.
Optionally, the determining whether a preset power-off condition is met according to the time of the timer and the start state signal further includes:
if the engine is changed from the starting state to the flameout state, restarting the timer for timing;
determining that a power-off condition is satisfied when the time of the restarted timer reaches the set time.
Optionally, the starting the preset timer includes:
and if the power-on signal of the starting switch is received and the automatic power-off function is started, starting the preset timer.
The beneficial effect of this application is:
the power-off control system, the engineering machine and the power-off control method provided by the application can comprise the following steps: the controller is electrically connected with the starting switch so as to obtain a power-on signal of the starting switch and start a preset timer based on the power-on signal; the power supply relay is electrically connected between a power supply and an electrical component of the engineering machinery, and the controller is also electrically connected with the power supply relay; the controller is also electrically connected with an engine of the engineering machinery to obtain a starting state signal of the engine, and determines whether a preset power-off condition is met or not according to the time of the timer and the starting state signal, if so, the power supply relay is controlled to be switched off to power off the electrical components. In the power-off control system of the engineering machinery, the controller can determine whether preset power-off conditions are met or not based on the starting state signals of the engine and the time of the timer, if so, the controller can be disconnected through the control power supply relay to realize the power-off of the electrical components, so that the complete machine automatic power-off of the engineering machinery is realized, the power shortage caused by the power-off forgetting of a user can be effectively avoided, the normal starting of the engineering machinery is guaranteed, and the starting fault is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a power outage control system of a construction machine according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of a power outage control system of another construction machine according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a power outage control system of another construction machine according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a construction machine according to an embodiment of the present disclosure;
fig. 5 is a flowchart of a power outage control method for a construction machine according to an embodiment of the present disclosure;
FIG. 6 is a flowchart of another method for controlling power outage of a construction machine according to an embodiment of the present disclosure;
fig. 7 is a schematic diagram of a power outage control method and apparatus according to an embodiment of the present application;
fig. 8 is a schematic diagram of a controller according to an embodiment of the present disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments.
The solutions provided in the present application may be applied to any type of work machine, such as an excavator, a backhoe loader, a wheel excavator, etc., but may also be applied to other types of work machines.
In the prior art, the power-off of the engineering machinery is based on the power-off operation input by a key or a start button of a user, once the user forgets to input the power-off operation, a power supply in the engineering machinery continuously supplies power for power utilization parts, so that the power supply is easily insufficient, the normal start of the engineering machinery is influenced, and the start fault is caused.
The power-off control system, the engineering machinery and the power-off control method aim at realizing automatic power-off of a power supply in the engineering machinery, avoiding power shortage of the power supply caused by the fact that a user forgets to power off, and guaranteeing normal starting of the engineering machinery.
The power outage control system provided by the embodiments of the present application is described by way of example in a plurality of embodiments with reference to the accompanying drawings. Fig. 1 is a schematic structural diagram of a power outage control system of a construction machine according to an embodiment of the present disclosure. As shown in fig. 1, the power outage control system 10 of the construction machine includes: controller 11, starting switch 12, power 13, power relay 14.
The controller 11 is electrically connected to the start switch 12 to obtain a power-on signal of the start switch 12, and starts the preset timer based on the power-on signal.
The power relay 14 is electrically connected between the power source 13 and the electrical component 21 of the construction machine, and the controller 11 is also electrically connected with the power relay 14 to control the power relay 14 to close based on the power-on signal, so that the power source 13 supplies power to the electrical component 21.
The controller 11 is also electrically connected to the engine 22 of the construction machine to obtain a start state signal of the engine 22, and determines whether a preset power-off condition is satisfied according to the time of the timer and the start state signal, and if so, controls the power relay 14 to be turned off to power off the electrical component 21.
Specifically, the controller 11 may be a microcontroller, which may also be referred to as a MicrocontrollerUnit (MCU), or a complete machine controller or a controller of other engineering machinery.
The start switch 12 may be, for example, a start switch of a one-key start button, or a key start switch. When the start switch 12 receives an input power-on operation, it generates a power-on signal and transmits the power-on signal to the controller 11.
The power source 13 may be a preset dc power source in the engineering machine, such as a storage battery, and the power relay 14 may be a main power relay of the engineering machine, that is, a power supply output by the power source 13, and needs to supply power to the electrical component 21 through the power relay 14. Therefore, the controller 11 can control the power supply and the power cut of the electrical components by controlling the on and off of the power supply relay 14.
The controller 11 may output a power-on control signal to a coil of the power relay 14 based on the power-on signal when receiving the power-on signal of the start switch 12, so as to control a contact of the power relay 14 to be closed, so that a power supply path between the power source 13 and the electrical component 21 is conducted, normal power supply of the electrical component 21 is achieved, and complete machine power-on of the engineering machine is achieved. When the controller 11 receives the power-on signal, the preset timer in the controller 11 may be started, so that the preset timer starts to time. Wherein, the power-on control signal can also be a coil control signal.
The controller 11, upon receiving the start state signal of the engine 22, may determine whether a preset power-off condition is satisfied based on the time of the preset timer and the start state signal, and if so, stop outputting the power-on control signal to the coil of the power relay 14 to control the contact of the power relay 14 to be opened, so that the power supply path between the power source 13 and the electrical component 21 is disconnected, thereby implementing automatic power-off of the electrical component 21, and implementing automatic power-off of the whole machine of the engineering machine.
The controller 11 may detect whether the engine 22 is in a started state or an un-started state from the start state signal, for example, and make a determination of the power-off condition based on the state detection result of the engine 22 and the time of a preset timer to determine whether a preset power-off condition is satisfied.
The controller 11 may determine the power-off condition using power-off determination logic corresponding to at least one of the following possible scenarios, for example:
in a first possible exemplary scenario, when the controller 11 detects that the engine is in an un-started state based on the start state signal, the controller 11 needs to determine whether the time of the timer reaches a set time, and if the engine is in the un-started state and the time of the timer also reaches the set time, it may be determined that a power-off condition is met, and then the power-on control signal may be stopped to be output to the power relay 14, so as to control the contact of the power relay 14 to be disconnected, thereby implementing power-off of the whole machine. Of course, if the engine is not started and the timer does not reach the set time, the detection based on the start status signal and the time of the preset timer can be continued.
In a second possible exemplary scenario, when the controller 11 detects that the engine is in the starting state based on the starting state signal, it may determine whether the time of the timer reaches a set time, and if the engine is in the starting state and the time of the timer does not reach the set time, it may determine that the power-off condition is not met, perform a clear process on the timer, and continuously output the power-on control signal to the power relay 14 by the controller 11 to control the contacts of the power relay 14 to be continuously closed until the power-on signal of the starting switch 12 is turned off, for example, the power-off signal of the starting switch 12 is received.
In a third possible exemplary scenario, when the controller 11 detects that the engine 22 is abnormally shut down based on the start state signal, that is, the engine 22 changes from the start state to the shut down state, the preset timer is controlled to restart the timer, and when the timer that is restarted reaches the set time, the full power outage condition can be determined, so that the power-on control signal can be stopped to be output to the power relay 14, so as to control the contacts of the power relay 14 to be opened, and thus the complete machine is powered off.
In a third possible exemplary scenario, when the controller 11 receives the power-off signal of the start switch 12, the power-off of the controller 11 is implemented, and thus, the controller 11 stops outputting the power-on control signal to the power relay 14 to control the contacts of the power relay 14 to be opened, so as to implement the manual power-off of the user. The power-off signal of the start switch 12 may be, for example, a power-off signal triggered by the key start switch being screwed to a preset power-off gear; of course, the power-off signal may be outputted by the power-off operation inputted by the one-touch start button.
The power-off control system of the engineering machinery provided by the embodiment of the application can comprise: the controller is electrically connected with the starting switch so as to obtain a power-on signal of the starting switch and start a preset timer based on the power-on signal; the power supply relay is electrically connected between a power supply and an electrical component of the engineering machinery, and the controller is also electrically connected with the power supply relay; the controller is also electrically connected with an engine of the engineering machinery to obtain a starting state signal of the engine, and determines whether a preset power-off condition is met or not according to the time of the timer and the starting state signal, if so, the power supply relay is controlled to be switched off to power off the electrical components. In the power-off control system of the engineering machinery, the controller can determine whether preset power-off conditions are met or not based on the starting state signals of the engine and the time of the timer, if so, the controller can be disconnected through the control power supply relay to realize the power-off of the electrical components, so that the complete machine automatic power-off of the engineering machinery is realized, the power shortage caused by the power-off forgetting of a user can be effectively avoided, the normal starting of the engineering machinery is guaranteed, and the starting fault is avoided.
On the basis of the power failure control system of the engineering machinery provided by the above embodiment, the embodiment of the present application may also provide a possible implementation example. Fig. 2 is a schematic structural diagram of another power outage control system of a construction machine according to an embodiment of the present disclosure. As shown in fig. 2, in the power-off control system 10 of the construction machine, the power source 13 may also be electrically connected to the start switch 12 to supply power to the controller 11 based on the power-on signal.
In a possible example, if the controller 11 may be a microcontroller, since the power consumption of the microcontroller is low, after the complete machine is automatically powered off, the power consumption of the power supply 13 by the controller 11 is not obvious, and the power supply 13 can last for a long time without causing power shortage of the power supply.
The power source 13 is electrically connected to the start switch 12, so that the power source 13 can supply power to the controller 11 through the start switch 12. That is, the power supply of the controller 11 is controlled by the start switch 12, so that after the start switch 12 receives the power-off signal, the power supply of the controller 11 can be cut off by the start switch 12, so that the controller 11 stops outputting the power-on control signal to the power relay 14 at the rear end to realize the power-off. After the controller 11 is powered off, a timer in the controller 11 is cleared to prepare for the next automatic power off of the whole machine.
On the basis of the power failure control system of the construction machine provided by any one of the above embodiments, the embodiments of the present application may also provide a possible implementation example. Fig. 3 is a schematic structural diagram of a power outage control system of another construction machine according to an embodiment of the present application. As shown in fig. 3, the power outage control system further includes: and the display screen 15 is in communication connection with the controller 11.
Optionally, the display screen 15 is also electrically connected to the power relay 14, so that the power supply 13 supplies power to the display screen 15 through the power relay 14. When the power supply relay 14 is closed, the conduction of a power supply path between the power supply 13 and the display screen 15 can be realized, and the power supply of the display screen is realized; when the power supply relay 14 is turned off, the power supply path between the power supply 13 and the display screen 15 is cut off, and the display screen is powered off.
The display screen 15 may display a setting interface with an auto-power-off function, and a user may input a set time length of the timer through the setting interface, and may also input an operation of turning on or off the auto-power-off function through the setting interface.
When the display screen 15 receives the set time length input by the timer, the time length can be transmitted to the controller 11, so that the controller 11 realizes the setting of the time length; when the display screen 15 receives the input starting operation of the automatic power-off function, the starting operation can be transmitted to the controller 11, so that the controller 11 controls the starting of the automatic power-off function, and the automatic power-off of the whole machine in each example scene is realized; when the display screen 15 receives the input closing operation of the automatic power-off function, the closing operation can be transmitted to the controller 11, so that the controller 11 closes the automatic power-off function and the shielding of the automatic power-off function is realized, for example, in the maintenance state of the engineering machinery, the automatic power-off function can be closed through a setting interface displayed by the display screen 15, the shielding of the automatic power-off function is realized, the maintenance state is ensured to be electrified for a long time, an engine is not started, and the maintenance of the engineering machinery is ensured.
On the basis of the power outage control system provided by any one of the above embodiments, an embodiment of the present application may further provide a construction machine including the above power outage control system. Fig. 4 is a schematic structural diagram of a construction machine according to an embodiment of the present application. As shown in fig. 4, work machine 20 may include: the power outage control system 10, the engine 22, and the electrical components 21 shown in any of the embodiments described above.
Wherein, the power supply relay 14 in the power failure control system 10 is electrically connected with the electrical component 21; the controller 11 in the power outage control system 10 is electrically connected to the engine 22.
Of course, the work machine 20 may also include other circuit structures, and mechanical structures that at least ensure an execution main body or the like that executes a corresponding function of the work machine 20, which is not limited in this application.
The engineering machine that this application embodiment provided can include above-mentioned arbitrary outage control system, can realize engineering machine's complete machine auto-power-off, can effectively avoid the user to forget the power shortage that the outage caused, guarantee engineering machine's normal start, avoid the starting fault to appear.
On the basis of the power outage control system and the engineering machine provided by the present application, an embodiment of the present application may further provide a power outage control method executed by the controller in the power outage control system, which is explained with reference to the accompanying drawings as follows. Fig. 5 is a flowchart of a power outage control method for a construction machine according to an embodiment of the present disclosure. As shown in fig. 5, the power-off control method may include the following:
s501, controlling a power supply relay to be closed according to the electrifying signal of the starting switch, enabling the power supply to supply power to the electrical component, and starting a preset timer.
And S502, determining whether a preset power-off condition is met according to the time of the timer and the starting state signal.
And S503, if so, controlling the power supply relay to be switched off so as to cut off the power of the electrical components.
For the description of each step in the power outage control method, reference may be made to the determination explanation of the power outage condition in each possible scenario in the power outage control system, and details are not repeated herein.
Optionally, on the basis of the method shown in fig. 5, an implementation example of the power outage control method may also be provided in the embodiments of the present application. Fig. 6 is a flowchart of another power outage control method for a construction machine according to an embodiment of the present disclosure. As shown in fig. 6, the determining whether the preset power-off condition is met according to the time of the timer and the start status signal in S502 in the method may include:
and S601, detecting whether the engine is in a starting state or a non-starting state according to the starting state signal.
And S602, if the engine is in an un-started state and the time of the timer reaches the set time, determining that a power-off condition is met.
Optionally, if the engine is in a starting state in the above method, the method may further include:
and S603, if the engine is in a starting state and the time of the timer does not reach the set time, carrying out zero clearing processing on the timer.
Optionally, in other possible implementation manners, in the method, in step S502, determining whether a preset power-off condition is met according to the time of the timer and the start state signal, and may further include:
and S604, restarting the timer to count time when the engine is changed from the starting state to the flameout state.
And S605, when the time of the restarted timer reaches the set time, determining that the power-off condition is met.
Under the condition of realizing automatic power-off, the engineering machinery provided by the application can also realize manual power-off, and optionally, the method further comprises the following steps:
if the power-off signal of the starting switch is received, the power supply relay is controlled to be switched off so as to power off the electrical component. The start switch may be a power-off signal triggered by a power-off operation input through the start switch.
Optionally, the auto-power-off function is optional, and may also be fixed and continuously turned on, for an optional example of the auto-power-off function, as the preset timer is started in the above method, the method may include:
and if the power-on signal of the starting switch is received and the automatic power-off function is started, starting the preset timer.
Taking the maintenance state as an example, if the power-on signal of the starting switch is received, and if the automatic power-off function is closed, the preset timer cannot be started, and the automatic power-off of the whole machine cannot be executed, so that the maintenance requirement of the maintenance state is met.
Each power-off control method provided in the embodiment of the present application can achieve the technical effect of the above-mentioned power-off control system, and the specific implementation process and technical effect are referred to above and will not be described herein again.
The following description continues to describe a device, a controller, a storage medium, and the like for executing the power-off control method provided by the present application, and specific implementation procedures and technical effects thereof are referred to above and will not be described again below.
Fig. 7 is a schematic diagram of a power-off control method apparatus according to an embodiment of the present application, and as shown in fig. 7, the power-off control method apparatus 700 may include:
a control module 701, configured to control the power relay to be turned on according to the power-on signal of the start switch, so that the power supply supplies power to the electrical component, and start a preset timer;
a determining module 702, configured to determine whether a preset power-off condition is met according to the time of the timer and the start status signal;
the control module 701 is further configured to control the power relay to be turned off if a preset power-off condition is met, so as to power off the electrical component.
Optionally, the determining module 702 is specifically configured to detect whether the engine is in a start state or an un-start state according to the start state signal; and if the engine is in an un-started state and the time of the timer reaches the set time, determining that the power-off condition is met.
Optionally, the power-off control method apparatus 700 may further include:
and the zero clearing module is used for carrying out zero clearing treatment on the timer if the engine is in a starting state and the time of the timer does not reach the set time.
Optionally, the control module 701 is specifically configured to restart the timer to count time if the engine changes from the starting state to the flameout state;
the determining module 702 is further specifically configured to determine that the power-off condition is met when the time of the restarted timer reaches the set time.
Optionally, the control module 701 is further configured to control the power relay to be turned off to power off the electrical component if the power-off signal of the start switch is received.
Optionally, the control module 701 is specifically configured to start the preset timer if the power-on signal of the start switch is received and the automatic power-off function is started.
The above-mentioned apparatus is used for executing the method provided by the foregoing embodiment, and the implementation principle and technical effect are similar, which are not described herein again.
These above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), among others. For another example, when one of the above modules is implemented in the form of a processing element scheduler code, the processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling program code. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).
Fig. 8 is a schematic diagram of a controller according to an embodiment of the present disclosure, where the controller may be integrated in an MCU or a chip of the MCU, or a complete machine controller or a chip of the complete machine controller.
The controller 800 includes: memory 801, processor 802. The memory 801 and the processor 802 are connected by a bus.
The memory 801 is used for storing programs, and the processor 802 calls the programs stored in the memory 801 to execute the above-mentioned method embodiments. The specific implementation and technical effects are similar, and are not described herein again.
Optionally, the present application also provides a program product, such as a computer readable storage medium, comprising a program which, when being executed by a processor, is adapted to carry out the above-mentioned method embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to perform some steps of the methods according to the embodiments of the present application. And the aforementioned storage medium includes: a U disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A power outage control system for a construction machine, comprising: the device comprises a controller, a starting switch, a power supply and a power supply relay;
the controller is electrically connected with the starting switch to obtain a power-on signal of the starting switch, and a preset timer is started based on the power-on signal;
the power supply relay is electrically connected between the power supply and an electrical component of the engineering machinery, and the controller is also electrically connected with the power supply relay so as to control the power supply relay to be closed based on the power-on signal, so that the power supply supplies power to the electrical component;
the controller is further electrically connected with an engine of the engineering machinery to obtain a starting state signal of the engine, and determines whether a preset power-off condition is met or not according to the time of the timer and the starting state signal, if so, the power supply relay is controlled to be switched off to power off the electrical component.
2. The system of claim 1, wherein the power source is further electrically connected to the start switch to power the controller based on the power-up signal.
3. The system of claim 1, wherein the power outage control system further comprises: and the display screen is in communication connection with the controller.
4. A system according to any of claims 1-3, wherein the activation switch is a one-touch activation button activation switch or a key activation switch.
5. A work machine, comprising: the power outage control system, the engine and the electrical components of any one of the preceding claims 1-4;
wherein the power supply relay in the power-off control system is electrically connected to the electrical component; the controller in the power-off control system is electrically connected with the engine.
6. A power outage control method for a construction machine, the method being applied to the power outage control system according to any one of claims 1-4, the method comprising:
controlling the power supply relay to be closed according to the power-on signal of the starting switch, so that the power supply supplies power to the electrical component, and starting a preset timer;
determining whether a preset power-off condition is met or not according to the time of the timer and the starting state signal;
and if so, controlling the power supply relay to be switched off so as to cut off the power of the electrical component.
7. The method of claim 6, wherein determining whether a preset power-off condition is met based on the time of the timer and the start-up status signal comprises:
detecting whether the engine is in a starting state or a non-starting state according to the starting state signal;
and if the engine is in an un-started state and the time of the timer reaches the set time, determining that a power-off condition is met.
8. The method of claim 7, further comprising:
and if the engine is in a starting state and the time of the timer does not reach the set time, carrying out zero clearing treatment on the timer.
9. The method of claim 8, wherein determining whether a preset power-off condition is met based on the time of the timer and the start-up status signal further comprises:
if the engine is changed from the starting state to the flameout state, restarting the timer for timing;
determining that a power-off condition is satisfied when the time of the restarted timer reaches the set time.
10. The method of claim 6, wherein the starting a preset timer comprises:
and if the power-on signal of the starting switch is received and the automatic power-off function is started, starting the preset timer.
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