An electro-hydraulic power system

Abstract

The application discloses an electro-hydraulic power system, and relates to the technical field of engineering machinery, which comprises a remote control module, a data acquisition module, a monitoring operation module and a safety protection module, the remote control module is used for communicating the motor controller with the vehicle-mounted part, and acquiring communication data, the data acquisition module is used for collecting data and constructing a multi-source data pool according to the communication data, the monitoring operation module is used for constructing a distributed control network based on the multi-source data pool, and the motor is controlled in cooperation with the remote control module, and the safety protection module is used for carrying out multi-layer protection on the distributed control network, through the integrated distributed control, mode switching, multiple electrical and temperature protection, remote monitoring and hydraulic control and the cooperative operation of multiple modules, the intelligentization and automation level of the system are improved, flexible management and efficient utilization of the power source of the engineering machinery are realized, and powerful guarantee is provided for the efficient, safe and flexible operation of the engineering machinery.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, and in particular to an electro-hydraulic power system. Background Technology

[0002] In recent years, with the increasing global demands for energy conservation, environmental protection, and equipment reliability, the construction machinery industry is facing unprecedented pressure for transformation. In this field, traditional fuel-hydraulic power systems are prone to failure due to the accelerated wear of precision components inside the motor drive caused by long-term equipment vibration, which seriously affects project progress and operating costs. High energy consumption not only significantly increases the economic burden on enterprises but also runs counter to the current advocacy of low-carbon development. Furthermore, the large amount of pollution emissions puts heavy pressure on the ecological environment and can no longer meet the requirements for greening and reliability, thus driving the industry to transform from fuel-based to electric power.

[0003] In existing technologies, vehicle-mounted controllers generally adopt a simplified design approach. Although the structure is simple, it cannot withstand long-term vibration. The cable management system also has obvious shortcomings. When supplying power over long distances, the traditional cable winding and unwinding mechanism is not only complex in structure and has high maintenance costs, but it is also difficult to accurately detect the cable winding and unwinding length. The safety protection mechanism of the entire system is not perfect, and there is a lack of effective protection measures for critical operations such as emergency stop and overload. Once an abnormal situation occurs, it may cause equipment damage or even safety accidents.

[0004] Therefore, the present invention proposes an electro-hydraulic power system. Summary of the Invention

[0005] The technical problem solved by this invention is that vehicle-mounted controllers generally adopt a simplified design approach, which, although simple in structure, cannot withstand long-term vibration. The cable management system also has obvious shortcomings. When supplying power over long distances, the traditional cable winding and unwinding mechanism is not only complex in structure and has high maintenance costs, but also makes it difficult to accurately detect the cable winding and unwinding length. The safety protection mechanism of the entire system is not perfect, and there is a lack of effective protection measures for critical operations such as emergency stop and overload. Once an abnormal situation occurs, it may cause equipment damage or even safety accidents.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an electro-hydraulic power system comprising a remote control module, a data acquisition module, a monitoring and operation module, and a safety protection module. The remote control module is used to communicate between the motor controller and the vehicle-mounted components and to acquire communication data; The data acquisition module is used to acquire data and construct a multi-source data pool based on the communication data; The monitoring operation module is used to build a distributed control network based on the multi-source data pool and coordinate with the remote control module to control the motor. The security protection module is used to provide multi-layered protection for the distributed control network.

[0007] In a preferred embodiment of the electro-hydraulic power system described in this invention, the remote control module is used to deploy the motor controller at a location far from the main vibration source of the construction machinery, the main vibration source including the engine and the hydraulic pump. Wireless data transmission modules are installed on the motor controller and the vehicle-mounted part respectively, and wireless data transmission technology is used to communicate between the motor controller and the vehicle-mounted part to obtain communication data.

[0008] As a preferred embodiment of the electro-hydraulic power system described in this invention, the logic for acquiring communication data includes: The wireless data transmission technology is determined based on the system application scenario. A communication protocol is then established between the motor controller wireless data transmission module and the vehicle-mounted wireless data transmission module based on this technology. The parameters of the motor controller wireless data transmission module and the vehicle-mounted wireless data transmission module are configured to match according to the communication protocol to establish a communication connection. The motor controller wireless data transmission module sends a communication data request command to the vehicle-mounted wireless data transmission module. The vehicle-mounted wireless data transmission module receives the communication data request command and transmits back communication data. The motor controller wireless data transmission module receives and acquires the communication data. The parameters include frequency, address, and baud rate.

[0009] As a preferred embodiment of the electro-hydraulic power system of the present invention, the data acquisition module includes a system status unit, a motor controller data unit, a sensor data unit, and a length monitoring unit. The system status unit is used to collect the current operating parameters of the main components, the health status of the system, and various alarm information. The main components include motors, batteries, and key hydraulic components. The motor controller data unit is used to collect key operating parameters of the motor controller and the command status of the motor. The key operating parameters include speed, torque, current and power. The sensor data unit is used to collect data from the sensors in the system, including temperature sensors, pressure sensors, vibration sensors, and position sensors. The length monitoring unit is used to set up a cable reel device, and a rotary encoder is installed inside the cable reel device to collect the cable winding and unwinding length; The data acquisition module is used to fuse the data collected by the system status unit, motor controller data unit, and sensor data unit with the communication data to establish a multi-source sensor data pool.

[0010] In a preferred embodiment of the electro-hydraulic power system described in this invention, the monitoring and operation module is used to construct a distributed control network based on the multi-source data pool, display the multi-source data pool data using a touch screen human-machine interface, and coordinate the monitoring and operation module with the remote control module to control the motor.

[0011] As a preferred embodiment of the electro-hydraulic power system of the present invention, the distributed control network includes a touch screen, a data transmission module, a mode conversion module, and a pulse generator. The touchscreen serves as the main controller for displaying multi-source data pool data in the human-machine interface. The data transmission module is used to transmit the multi-source data pool data to the touch screen; The mode conversion module is used to detect the power bus voltage through a voltage sensor. When the power bus voltage is greater than or equal to a first threshold, the relay switches the hydraulic pump signal, the pulse generator simulates the engine speed, and the fuel mode of the power source of the construction machinery is switched to electric mode. The pulse generator is used to generate square wave signals to simulate engine speed.

[0012] As a preferred embodiment of the electro-hydraulic power system described in this invention, the logic for constructing the distributed control network includes: A local network and a remote network are constructed through an industrial serial communication bus. The local network connects the data transmission module, the mode conversion module, and the pulse generator, while the remote network connects to the motor controller. Monitoring and control of the vehicle-mounted components and the motor controller are achieved through a touch screen human-machine interface.

[0013] As a preferred embodiment of the electro-hydraulic power system of the present invention, the logic of precisely controlling the motor by coordinating the monitoring operation module with the remote control module includes: The first part consists of the remote control module using wireless transmission technology for communication, and the second part consists of the monitoring and operation module constructing a distributed control network to issue commands. The first part and the second part are mapped to each other as the first correspondence. The remote control module receives the pulse generator speed signal as the third part, and the operation module adjusts the hydraulic pump output flow according to the motor speed as the fourth part. The correspondence between the third part and the fourth part is the second correspondence relationship. The remote control module receives the mode switching signal as the fifth part, and the motor controller adjustment parameters of the operation module are taken as the sixth part. The correspondence between the fifth part and the sixth part is taken as the third correspondence relationship. Based on the first, second, and third correspondences, the remote control module deploys the motor controller at a location far from the main vibration source of the construction machinery, configures the wireless data transmission module parameters, and the monitoring and operation module constructs a distributed control network. The remote network connects to the motor controller, the remote control module collects communication data, and the monitoring and operation module displays the communication data on the touch screen human-machine interface. When the power bus voltage is greater than or equal to the first threshold, the system switches to electric mode. The operator sets the preset parameters for the motor speed on the monitoring module's touch screen, and the distributed control network transmits the command to set the motor speed to the motor controller. The hydraulic pump output flow is adjusted according to the motor speed.

[0014] As a preferred embodiment of the electro-hydraulic power system of the present invention, the safety protection module is used to provide multi-layer protection for the distributed control network, the multi-layer protection including an electrical protection layer, a power device protection layer and a temperature protection layer; The electrical protection layer is used in conjunction with a current detection device and a hardware / software current limiting protection circuit. The power device protection layer is used to set up power devices in the motor controller and to set up multiple electrical protection functions for the switching power supply. The multiple electrical protection functions include input over / under voltage protection, output overcurrent and short circuit protection, and system overheat protection. The temperature protection layer is used to collect temperature sensor data. When an abnormal temperature is detected, a graded temperature management strategy is activated and different recovery mechanisms are adopted.

[0015] As a preferred embodiment of the electro-hydraulic power system described in this invention, the logic of the graded temperature management strategy and the use of different recovery mechanisms includes: Level 1 warning temperature: When the detected temperature is greater than or equal to the second threshold and less than the third threshold, an audible and visual alarm is triggered, and the system restarts after the temperature drops to the preset safe value; Secondary derating temperature: When the detected temperature is greater than or equal to the third threshold but less than the fourth threshold, the motor power is reduced to the set threshold. After manual intervention and confirmation, the system is restored to normal working state. Level 3 protection temperature: When the detected temperature is greater than or equal to the fourth threshold but less than the fifth threshold, the power output is cut off, and the system is restored to normal operation after manual intervention and confirmation. Level 4 Emergency Temperature: When the detected temperature is greater than or equal to the fifth threshold but less than the sixth threshold, the power supply to the equipment will be cut off, and the system will be restored to normal operation after the fault is resolved.

[0016] The beneficial effects of this invention are as follows: This invention proposes an electro-hydraulic power system. This system improves the intelligence and automation level of the system by integrating multiple modules such as distributed control, mode switching, multiple electrical and temperature protection, remote monitoring and hydraulic control. It realizes flexible management and efficient utilization of the power source of construction machinery. At the same time, it optimizes the system architecture, and the multiple protection mechanisms enhance the stability and reliability of the system, enabling it to adapt to complex working conditions. The distributed control and remote monitoring functions simplify maintenance, providing a strong guarantee for the efficient, safe and flexible operation of construction machinery. Attached Figure Description

[0017] Figure 1 This is a basic flowchart of an electro-hydraulic power system provided in one embodiment of the present invention. Detailed Implementation

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] Example 1, referring to Figure 1 As one embodiment of the present invention, an electro-hydraulic power system is provided, including a remote control module, a data acquisition module, a monitoring and operation module, and a safety protection module: The remote control module is used to communicate between the motor controller and the vehicle-mounted components and to acquire communication data.

[0020] The data acquisition module is used to collect data and build a multi-source data pool based on communication data.

[0021] The monitoring and operation module is used to build a distributed control network based on a multi-source data pool and coordinate with the remote control module to control the motor.

[0022] The security protection module is used to provide multi-layered protection for distributed control networks.

[0023] The remote control module is used to deploy the motor controller at a location far from the main vibration sources of the construction machinery, including the engine and hydraulic pump. Wireless data transmission modules are installed on both the motor controller and the vehicle-mounted unit, and wireless data transmission technology is used to communicate between the motor controller and the vehicle-mounted unit to obtain communication data.

[0024] Deploying the motor controller in a location far from the main vibration sources of the construction machinery can effectively reduce the impact of vibration on the controller's stability and improve its reliability. Installing wireless data transmission modules on both the motor controller and the vehicle-mounted unit, and using wireless technology for communication, not only simplifies wiring but also enhances the system's flexibility and maintainability. This allows the remote control module to effectively acquire communication data, thereby enabling precise remote monitoring and operation of the motor.

[0025] The logic for obtaining communication data includes: The wireless data transmission technology is determined based on the system application scenario. The communication protocol between the motor controller wireless data transmission module and the vehicle-mounted wireless data transmission module is then determined based on this technology. The parameters of the motor controller wireless data transmission module and the vehicle-mounted wireless data transmission module are configured to be consistent according to the communication protocol to establish a communication connection. The motor controller wireless data transmission module sends a communication data request command to the vehicle-mounted wireless data transmission module. The vehicle-mounted wireless data transmission module receives the communication data request command and transmits the communication data back. The motor controller wireless data transmission module receives and acquires the communication data, including parameters such as frequency, address, and baud rate.

[0026] The wireless data transmission technology, determined based on the system application scenario, ensures the reliability and adaptability of communication. The communication protocol, determined based on the wireless data transmission technology, ensures that the data can be correctly understood. Data interaction is achieved using the wireless data transmission module, avoiding the wire harness loss and poor contact problems of traditional hard wire connections, ensuring communication stability, optimizing spatial layout, and reducing the impact of environmental factors on equipment aging.

[0027] The data acquisition module includes a system status unit, a motor controller data unit, a sensor data unit, and a length monitoring unit.

[0028] The system status unit is used to collect the current operating parameters of the main components, the health status of the system, and various alarm information. The main components include motors, batteries, and key hydraulic components.

[0029] By integrating this data, the system status unit enables the system to monitor its own operational status in real time, providing basic data support for subsequent data processing, monitoring decisions, and security protection.

[0030] The motor controller data unit is used to collect key operating parameters of the motor controller and the command status of the motor. Key operating parameters include speed, torque, current and power.

[0031] The motor controller data unit provides the monitoring and operation module with detailed, real-time data on the motor's operating status, enabling the system to accurately understand the actual working condition of the motor.

[0032] The sensor data unit is used to collect data from the sensors in the system, including temperature sensors, pressure sensors, vibration sensors, and position sensors.

[0033] Sensor data units provide the system with physical information about environmental conditions, operating status, and potential risks, and are an important data source for the system to achieve accurate monitoring and fault early warning.

[0034] The length monitoring unit is used to set up the cable reel device, and a rotary encoder is installed inside the cable reel device to collect the cable winding and unwinding length.

[0035] The length monitoring unit monitors the cable winding and unwinding length. When the cable winding and unwinding length exceeds the preset safety range, the system will immediately trigger an alarm mechanism to ensure that the operation of the entire system is always under control.

[0036] The data acquisition module is used to fuse the data collected by the system status unit, motor controller data unit, and sensor data unit with the communication data to establish a multi-source sensor data pool.

[0037] The monitoring and operation module is used to build a distributed control network based on a multi-source data pool. It uses a touch screen human-machine interface to display data from the multi-source data pool and coordinates the monitoring and operation module with the remote control module to control the motor.

[0038] The monitoring and operation module, in conjunction with the remote control module, controls the motor, allowing for remote or on-site management. This enhances control accuracy and reliability. Even if the remote module fails, the local module can take over, reducing downtime risks, optimizing human-machine interaction, and making motor control more efficient.

[0039] The distributed control network includes a touch screen, a data transmission module, a mode conversion module, and a pulse generator.

[0040] The touchscreen serves as the main controller for displaying multi-source data pool data in the human-machine interface.

[0041] The data transmission module is used to transmit multi-source data pool data to the touch screen.

[0042] The mode switching module is used to detect the power bus voltage through a voltage sensor. When the power bus voltage is greater than or equal to the first threshold, the relay switches the hydraulic pump signal, the pulse generator simulates the engine speed, and the fuel mode of the construction machinery power source is switched to electric mode.

[0043] The pulse generator is used to generate square wave signals to simulate engine speed.

[0044] The pulse generator outputs a simulated square wave signal, which solves the problem of missing speed signal after power source switching, ensuring the logical coherence of the entire control system and the collaborative work between devices.

[0045] The logic for constructing a distributed control network includes: A local network and a remote network are constructed through an industrial serial communication bus. The local network connects the data transmission module, mode conversion module and pulse generator, while the remote network connects to the motor controller. The on-board components and the motor controller are monitored and controlled through a touch screen human-machine interface.

[0046] The local network connects the data transmission module, mode conversion module, and pulse generator, forming a closely cooperating unit. The remote network connects to the motor controller, enabling long-distance data interaction. This design makes the data flow and control flow of the entire system clearer and more efficient, and provides users with a centralized and convenient human-machine interface, significantly improving the overall integration and ease of use of the system.

[0047] The logic for precisely controlling the motor by coordinating the monitoring operation module with the remote control module includes: The first part consists of the remote control module using wireless transmission technology for communication, and the second part consists of the monitoring and operation module constructing a distributed control network to issue commands. The first part and the second part are then mapped to each other as the first correspondence.

[0048] The wireless commands issued by the remote control can be received and processed by the network of the monitoring and operation module, and transformed into specific control commands for distribution. This lays the foundation for wireless communication and control command transmission between the two modules, and is one of the core mechanisms for achieving collaborative work between remote monitoring and local control.

[0049] The remote control module receives the pulse generator speed signal as the third part, and the operation module adjusts the hydraulic pump output flow according to the motor speed as the fourth part. The third part and the fourth part are mapped to form the second correspondence.

[0050] The second correspondence ensures that the control system can accurately adjust the hydraulic output based on real-time speed feedback, achieving more stable and efficient power matching and motion control.

[0051] The remote control module receives the mode switching signal as the fifth part, and the motor controller adjustment parameters of the operation module are taken as the sixth part. The fifth part and the sixth part are mapped to form the third correspondence.

[0052] The third correspondence ensures that the system can respond quickly and accurately when a change of mode is required, and can configure the motor parameters accordingly.

[0053] Based on the first, second, and third correspondences, the remote control module deploys the motor controller at a location far from the main vibration source of the construction machinery, configures the wireless data transmission module parameters, and the monitoring and operation module constructs a distributed control network. The remote network connects to the motor controller, the remote control module collects communication data, and the monitoring and operation module displays the communication data on the touch screen human-machine interface. When the power bus voltage is greater than or equal to the first threshold, it switches to electric mode. The operator sets the preset parameters for the motor speed on the monitoring module's touch screen, and the distributed control network transmits the command to set the motor speed to the motor controller, adjusting the hydraulic pump output flow according to the motor speed.

[0054] By leveraging the synergy of remote control and local monitoring, the system enables switching between electric modes, setting parameters, and subsequent adjustment of the hydraulic system, demonstrating the design's logic and practicality.

[0055] The safety protection module is used to provide multi-layer protection for distributed control networks. The multi-layer protection includes an electrical protection layer, a power device protection layer, and a temperature protection layer.

[0056] The electrical protection layer is used in conjunction with current detection devices and hardware / software current limiting protection circuits.

[0057] Once an abnormal current is detected, the protection circuit will quickly activate to limit the current, thereby effectively preventing damage to electrical equipment due to overload or short circuit, and ensuring the electrical safety and reliability of the system.

[0058] The power device protection layer is used to house power devices in the motor controller and to provide multiple electrical protection functions for the switching power supply. These multiple electrical protection functions include input over / under voltage protection, output overcurrent and short circuit protection, and system overheat protection.

[0059] It provides comprehensive monitoring and protection for the switching power supply and its connected electrical systems, preventing equipment damage or operational failures caused by abnormal voltage, current, or temperature.

[0060] The temperature protection layer is used to collect temperature sensor data. When an abnormal temperature is detected, a graded temperature management strategy is activated and different recovery mechanisms are adopted.

[0061] The temperature protection layer employs different recovery mechanisms for different levels of temperature anomalies. This ensures that after the problem is resolved, the system can gradually resume normal operation in the most reasonable way, guaranteeing safety while minimizing unnecessary downtime.

[0062] The logic behind a tiered temperature management strategy and the use of different recovery mechanisms includes: Level 1 warning temperature: When the detected temperature is greater than or equal to the second threshold but less than the third threshold, an audible and visual alarm is triggered, and the system restarts after the temperature drops back to the preset safe value.

[0063] Secondary derating temperature: When the detected temperature is greater than or equal to the third threshold but less than the fourth threshold, the motor power is reduced to the set threshold. After manual intervention and confirmation, the system is restored to normal working state.

[0064] Level 3 protection temperature: When the detected temperature is greater than or equal to the fourth threshold but less than the fifth threshold, the power output is cut off, and the system is restored to normal operation after manual intervention and confirmation.

[0065] Level 4 Emergency Temperature: When the detected temperature is greater than or equal to the fifth threshold but less than the sixth threshold, the power supply to the equipment will be cut off, and the system will be restored to normal operation after the fault is resolved.

[0066] This invention proposes an electro-hydraulic power system. This system improves the intelligence and automation level of the system by integrating multiple modules such as distributed control, mode switching, multiple electrical and temperature protection, remote monitoring and hydraulic control. It realizes flexible management and efficient utilization of the power source of construction machinery. At the same time, the system architecture is optimized, and multiple protection mechanisms enhance the stability and reliability of the system, enabling it to adapt to complex working conditions. The distributed control and remote monitoring functions simplify maintenance, providing a strong guarantee for the efficient, safe and flexible operation of construction machinery.

[0067] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media containing computer-usable program code. The storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read Only Memory (EPROM), Programmable Red-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. 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.

[0068] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An electro-hydraulic power system, characterized in that, It includes a remote control module, a data acquisition module, a monitoring and operation module, and a security protection module: The remote control module is used to communicate between the motor controller and the vehicle-mounted components and to acquire communication data; The data acquisition module is used to acquire data and construct a multi-source data pool based on the communication data; The monitoring operation module is used to build a distributed control network based on the multi-source data pool and coordinate with the remote control module to control the motor. The security protection module is used to provide multi-layered protection for the distributed control network.

2. The electro-hydraulic power system as described in claim 1, characterized in that: The remote control module is used to deploy the motor controller at a location far from the main vibration source of the construction machinery, including the engine and hydraulic pump. Wireless data transmission modules are installed on the motor controller and the vehicle-mounted part respectively, and wireless data transmission technology is used to communicate between the motor controller and the vehicle-mounted part to obtain communication data.

3. The electro-hydraulic power system as described in claim 2, characterized in that: The logic for acquiring communication data includes: The wireless data transmission technology is determined based on the system application scenario. A communication protocol is then established between the motor controller wireless data transmission module and the vehicle-mounted wireless data transmission module based on this technology. The parameters of the motor controller wireless data transmission module and the vehicle-mounted wireless data transmission module are configured to match according to the communication protocol to establish a communication connection. The motor controller wireless data transmission module sends a communication data request command to the vehicle-mounted wireless data transmission module. The vehicle-mounted wireless data transmission module receives the communication data request command and transmits back communication data. The motor controller wireless data transmission module receives and acquires the communication data. The parameters include frequency, address, and baud rate.

4. The electro-hydraulic power system as described in claim 1, characterized in that: The data acquisition module includes a system status unit, a motor controller data unit, a sensor data unit, and a length monitoring unit; The system status unit is used to collect the current operating parameters of the main components, the health status of the system, and various alarm information. The main components include motors, batteries, and key hydraulic components. The motor controller data unit is used to collect key operating parameters of the motor controller and the command status of the motor. The key operating parameters include speed, torque, current and power. The sensor data unit is used to collect data from the sensors in the system, including temperature sensors, pressure sensors, vibration sensors, and position sensors. The length monitoring unit is used to set up a cable reel device, and a rotary encoder is installed inside the cable reel device to collect the cable winding and unwinding length; The data acquisition module is used to fuse the data collected by the system status unit, motor controller data unit, and sensor data unit with the communication data to establish a multi-source sensor data pool.

5. The electro-hydraulic power system as described in claim 1, characterized in that: The monitoring operation module is used to build a distributed control network based on the multi-source data pool, display the multi-source data pool data using a touch screen human-machine interface, and coordinate the monitoring operation module with the remote control module to control the motor.

6. The electro-hydraulic power system as described in claim 5, characterized in that: The distributed control network includes a touch screen, a data transmission module, a mode conversion module, and a pulse generator; The touchscreen serves as the main controller for displaying multi-source data pool data in the human-machine interface. The data transmission module is used to transmit the multi-source data pool data to the touch screen; The mode conversion module is used to detect the power bus voltage through a voltage sensor. When the power bus voltage is greater than or equal to a first threshold, the relay switches the hydraulic pump signal, the pulse generator simulates the engine speed, and the fuel mode of the power source of the construction machinery is switched to electric mode. The pulse generator is used to generate square wave signals to simulate engine speed.

7. The electro-hydraulic power system as described in claim 6, characterized in that: The logic for constructing the distributed control network includes: A local network and a remote network are constructed through an industrial serial communication bus. The local network connects the data transmission module, the mode conversion module, and the pulse generator, while the remote network connects to the motor controller. Monitoring and control of the vehicle-mounted components and the motor controller are achieved through a touch screen human-machine interface.

8. The electro-hydraulic power system as described in claim 5, characterized in that: The logic for precisely controlling the motor by coordinating the monitoring operation module with the remote control module includes: The first part consists of the remote control module using wireless transmission technology for communication, and the second part consists of the monitoring and operation module constructing a distributed control network to issue commands. The first part and the second part are mapped to each other as the first correspondence. The remote control module receives the pulse generator speed signal as the third part, and the operation module adjusts the hydraulic pump output flow according to the motor speed as the fourth part. The correspondence between the third part and the fourth part is the second correspondence relationship. The remote control module receives the mode switching signal as the fifth part, and the motor controller adjustment parameters of the operation module are taken as the sixth part. The correspondence between the fifth part and the sixth part is taken as the third correspondence relationship. Based on the first, second, and third correspondences, the remote control module deploys the motor controller at a location far from the main vibration source of the construction machinery, configures the wireless data transmission module parameters, and the monitoring and operation module constructs a distributed control network. The remote network connects to the motor controller, the remote control module collects communication data, and the monitoring and operation module displays the communication data on the touch screen human-machine interface. When the power bus voltage is greater than or equal to the first threshold, the system switches to electric mode. The operator sets the preset parameters for the motor speed on the monitoring module's touch screen, and the distributed control network transmits the command to set the motor speed to the motor controller. The hydraulic pump output flow is adjusted according to the motor speed.

9. The electro-hydraulic power system as described in claim 1, characterized in that: The security protection module is used to provide multi-layer protection for the distributed control network, including an electrical protection layer, a power device protection layer, and a temperature protection layer. The electrical protection layer is used in conjunction with a current detection device and a hardware / software current limiting protection circuit. The power device protection layer is used to set up power devices in the motor controller and to set up multiple electrical protection functions for the switching power supply. The multiple electrical protection functions include input over / under voltage protection, output overcurrent and short circuit protection, and system overheat protection. The temperature protection layer is used to collect temperature sensor data. When an abnormal temperature is detected, a graded temperature management strategy is activated and different recovery mechanisms are adopted.

10. The electro-hydraulic power system as described in claim 9, characterized in that: The logic of the graded temperature management strategy and the different recovery mechanisms includes: Level 1 warning temperature: When the detected temperature is greater than or equal to the second threshold and less than the third threshold, an audible and visual alarm is triggered, and the system restarts after the temperature drops to the preset safe value; Secondary derating temperature: When the detected temperature is greater than or equal to the third threshold but less than the fourth threshold, the motor power is reduced to the set threshold. After manual intervention and confirmation, the system is restored to normal working state. Level 3 protection temperature: When the detected temperature is greater than or equal to the fourth threshold but less than the fifth threshold, the power output is cut off, and the system is restored to normal operation after manual intervention and confirmation. Level 4 Emergency Temperature: When the detected temperature is greater than or equal to the fifth threshold but less than the sixth threshold, the power supply to the equipment will be cut off, and the system will be restored to normal operation after the fault is resolved.

Images