WO2023197505A1

WO2023197505A1 - Driving control apparatus and method for marine low-speed machine, and electronic device

Info

Publication number: WO2023197505A1
Application number: PCT/CN2022/115565
Authority: WO
Inventors: 李韬; 柯少卿; 王园; 梅春阳; 陶国华; 李大保; 吴朝晖; 刘博�; 刘利军; 张继光; 韩连任; 周秀亚; 田新娜; 夏倩; 王传娟
Original assignee: 中船动力研究院有限公司
Priority date: 2022-04-15
Filing date: 2022-08-29
Publication date: 2023-10-19
Also published as: CN114895584A

Abstract

A driving control apparatus and method for a marine low-speed machine, and an electronic device. The apparatus comprises a signal acquisition module (101), a master control module (102), a first slave control module (103), and a plurality of second slave control modules (104). The signal acquisition module (101) is configured to acquire a state signal of a speed measurement fluted disc of the marine low-speed machine; the plurality of second slave control modules (104) are connected in sequence; the first slave control module (103) is connected to a first one of the second slave control modules (104); the master control module (102) is connected to the first slave control module (103); the first slave control module (103) is configured to determine operation information according to the state signal, and send the operation information and a first local clock signal to the master control module (102); the master control module (102) is configured to send the operation information and the first local clock signal to the second slave control modules (104), and synchronize clocks of slave control modules in real time; and the second slave control modules (104) are configured to control the operation state of a corresponding second cylinder according to the first local clock signal and the operation information.

Description

Driving control device, method and electronic equipment for marine low-speed engine

This application claims priority to the Chinese patent application with application number 202210398394.5, which was submitted to the China Patent Office on April 15, 2022. The entire content of this application is incorporated into this application by reference.

Technical field

Embodiments of the present application relate to marine low-speed engine control technology, for example, to a drive control device, method and electronic equipment for a marine low-speed engine.

Background technique

With the development of the shipping industry, in order to improve the adaptability of various types of ships and provide better driving force, marine low-speed engines are widely used in ships due to their high thermal efficiency, good economy, and easy starting. In order to make the propeller have higher propulsion efficiency, it requires a lower speed, so a low-speed marine low-speed engine is often used to directly drive the propeller.

In related technologies, the rotation speed signal of a low-speed marine engine is usually collected by the host driving an encoder or a toothed disk equipped with a Hall sensor. In order to increase the stability of the entire navigation process, the collected rotation speed signal needs to be distributed to multiple devices on the ship. in the controller. The distribution of speed signals is often completed in two ways: one is to connect all controllers to the speed signals to complete signal synchronization, and the other is to distribute the speed signals through communication. This communication method often uses the CAN network or Ethernet.

However, when all controllers are connected to the speed signal, although the synchronization of the speed signals between multiple controllers can be ensured, it requires more cables to be connected, the wiring is complicated, and it is difficult to ensure consistent time-based control of multiple controllers. When using CAN network or Ethernet to communicate to distribute the speed signal, it is difficult to ensure the real-time communication and the synchronization of the speed signal.

Contents of the invention

This application provides a drive control device, method and electronic equipment for a marine low-speed engine to achieve synchronization of operating information of multiple cylinders and improve real-time communication and synchronization of cylinder operating states.

In a first aspect, embodiments of the present application provide a drive control device for a marine low-speed engine. The drive control device for a marine low-speed engine includes: a signal acquisition module, a main control module, a first slave control module and a plurality of second slave control modules. ;

The signal acquisition module is configured to collect the status signal of the speed measuring gear plate of the marine low-speed engine;

A plurality of second slave control modules are connected in sequence, the first slave control module is connected to the first second slave control module, the master control module is connected to the first slave control module, and the first slave control module is connected to the first slave control module. A slave control module is connected to the signal acquisition module, and the first slave control module is configured to determine operating information according to the status signal, and send the operating information and the first local clock signal to the main control module; The main control module is configured to send the operating information and the first local clock signal to the second slave control module via the first slave control module and synchronize the clock of the second slave control module in real time; The second slave control module is configured to control the operating state of the corresponding second cylinder in the marine low-speed engine according to the first local clock signal and the operating information.

In a second aspect, embodiments of the present application also provide a drive control method for a marine low-speed engine. The drive control method for a marine low-speed engine includes:

The signal acquisition module collects the status signal of the speed measuring gear plate of the marine low-speed engine;

The first slave control module determines the operating information according to the status signal, and sends the operating information and the first local clock signal to the master control module;

The main control module sends the operating information and the first local clock signal to the second slave control module and synchronizes the clock of the second slave control module in real time;

The second slave control module controls the operating state of the corresponding second cylinder according to the first local clock signal and the operating information.

In a third aspect, embodiments of the present application further provide an electronic device, where the electronic device includes:

at least one processor; and

a memory communicatively connected to the at least one processor; wherein,

The memory stores a computer program that can be executed by the at least one processor, and the computer program is executed by the at least one processor, so that the at least one processor can execute the marine low-speed engine described in the second aspect. drive control method.

Description of the drawings

Figure 1 is a schematic structural diagram of a drive control device for a marine low-speed engine provided by an embodiment of the present application;

Figure 2 is a schematic structural diagram of another drive control device for a marine low-speed engine provided by an embodiment of the present application;

Figure 3 is a schematic structural diagram of a signal acquisition module and a speed measuring gear plate of a marine low-speed engine provided by an embodiment of the present application;

Figure 4 is a waveform comparison diagram of a two-phase switching signal provided by an embodiment of the present application;

Figure 5 is a schematic structural diagram of another drive control device for a marine low-speed engine provided by an embodiment of the present application;

Figure 6 is a flow chart of a drive control method for a marine low-speed engine provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.

Detailed ways

The embodiment of the present application provides a drive control device for a marine low-speed engine. Figure 1 is a schematic structural diagram of a drive control device for a marine low-speed engine provided by an embodiment of the present application. Referring to Figure 1 , the drive control device 100 for a marine low-speed engine includes: a signal acquisition module 101, a master control module 102, and a first slave control module 103 and a plurality of second slave control modules 104; the signal acquisition module 101 is provided in the marine low-speed engine and is configured to collect the status signal of the speed measuring gear plate of the marine low-speed engine; the plurality of second slave control modules 104 are connected in sequence, and the first The slave control module 103 is connected to the first and second slave control module 104, the master control module 102 is connected to the first slave control module 103, the first slave control module 103 is connected to the signal acquisition module 101, and the first slave control module 103 is set to The operating information is determined according to the status signal, and the operating information and the first local clock signal are sent to the main control module 102; the main control module 102 is configured to send the operating information and the first local clock signal to the second slave control module 103 via the first slave control module 103. The slave control module 104 synchronizes the clock of the second slave control module 104 in real time; the second slave control module 104 is configured to control the operating state of the corresponding second cylinder in the marine low-speed engine according to the first local clock signal and operating information.

For example, the marine low-speed engine is a low-speed engine used on ships. For example, the marine low-speed engine may be a diesel engine. The signal acquisition module 101 is a sensing component installed in the marine low-speed engine. It can collect the status signal of the speed measuring gear plate installed at the rear end of the marine low-speed engine. The status signal can be a phase signal and a top dead center signal. The phase signal can be a sensor The component generates a signal based on the real-time position on the speed measuring toothed disc corresponding to the sensing component. The top dead center signal may be a signal generated by the sensing component based on the position of the top dead center of the speed measuring toothed disc. The first slave control module 103 can process the status signal output by the signal acquisition module 101, determine the operating information of the speed measuring gear plate of the marine low-speed engine according to the status signal, and forward the operating information and the first local clock signal to the main control module 102, where , the first local clock signal is a clock signal generated when the first slave control module 103 receives the status signal, and the time when the status signal is generated can be recorded. The main control module 102 is the overall control module of the drive control device. It is connected to the plurality of second slave control modules 104 through the first slave control module 103 and can send a clock synchronization signal to control the first slave control module 103 and the plurality of second slave control modules. The local time of module 104 remains consistent. The master control module 102 may also forward the operating information and the corresponding first local clock signal to the plurality of second slave control modules 104 via the first slave control module 103 . The plurality of second slave control modules 104 are respectively connected to the corresponding second cylinders in the marine low-speed engine. The second slave control modules 104 have the same number as the second cylinders and are linked in a one-to-one correspondence. The second slave control modules 104 can be configured according to the first local The clock signal determines the time difference between the local time and the time when the status signal is generated, and determines the local control signal corresponding to the operating information based on the time difference, and controls the operating state of the corresponding second cylinder according to the local control signal, so that the multiple second cylinders Both phase and speed are consistent with the first cylinder.

In the drive control device of the marine low-speed engine provided by this embodiment, the signal acquisition module provided in the marine low-speed engine can collect the status signal of the speed measuring gear plate of the marine low-speed engine, and the first slave control module can determine the marine low-speed gear according to the status signal. The main control module can control the first slave control module and the second slave control module to keep the clocks unified, and can also control the clock signal sent by the first slave control module. The operating information and the first clock signal are forwarded to the second slave control module. The second slave control module can control the operating status of the corresponding second cylinder based on the difference between the first clock signal and the local clock, realizing the control of multiple cylinders of the marine low-speed engine. For synchronous control of operating status, the second slave control module can determine the operating information corresponding to the second cylinder at this time based on the difference between the first clock signal and the local clock signal, synchronizing the operating information of multiple cylinders of the marine low-speed engine, and improving the marine The real-time communication between the control modules corresponding to multiple cylinders of the low-speed machine and the synchronization of the cylinder operating status.

Continuing to refer to FIG. 1 , for example, the master control module 102 , the first slave control module 103 and the plurality of second slave control modules 104 are connected through Ethernet control automation technology bus communication.

For example, the Ethernet for Control Automation Technology bus is also called the EtherCAT bus, which can be understood as an Ethernet-based field bus. The EtherCAT network includes multiple communication nodes. When the data frame passes through the EtherCAT node, The node will forward the data frame and then send it to the next node. At the same time, when the data corresponding to this node is identified, it will be processed accordingly, and the sending will be completed by inserting the data that needs to be sent into the data sent to the next node. Data manipulation. The master control module 102, the first slave control module 103 and the plurality of second slave control modules 104 can each serve as a node in the EtherCAT network. Since the time it takes for multiple nodes in the EtherCAT network to receive and transmit data is less than 1 microsecond, only one frame can provide data transmission and reception between multiple nodes on the network. Therefore, the EtherCAT network is used to network the main control module 102, the first slave control module 103 and the second slave control module 104 in the drive control device 100 of the marine low-speed engine, ensuring that the speed information is transmitted between multiple control modules. real-time and improves network bandwidth utilization.

The EtherCAT network also has a distributed clock function, which allows devices corresponding to multiple nodes in the EtherCAT network to use the same system time, thereby controlling the synchronous execution of tasks on multiple devices. In this embodiment of the present application, clock synchronization between the master control module 102, the first slave control module 103, and the second slave control module 104 is achieved through the distributed clock function of the EtherCAT network. For example, the local clock of the first slave control module 103 that is directly connected to the master control module 102 is used as a reference clock, and the local clock of the second slave control module 104 is synchronized with the time information of the reference clock.

In the drive control device for a marine low-speed engine provided in this embodiment, the communication connection between the main control module, the first slave control module and the second slave control module adopts the EtherCAT network connection. Each module serves as a node in the EtherCAT network. The control module has a clock synchronization function, which can make the local clocks of multiple second slave control modules consistent with the first slave control module, realizing clock synchronization of multiple modules in the drive control device of marine low-speed engines, and avoiding the need to use the network When communication distributes operation information to multiple slave control modules, it is difficult to ensure the real-time communication and synchronization of operation information. This ensures the simplicity of the communication cables between multiple second slave control modules that receive operation information, and improves The real-time and synchronicity of receiving operating information from the control module for multiple cylinders in a marine low-speed engine.

Figure 2 is a schematic structural diagram of another drive control device for a marine low-speed engine provided by an embodiment of the present application. Figure 3 is a schematic structural diagram of a signal acquisition module and a speed measuring gear plate of a marine low-speed engine provided by an embodiment of the present application. Figure 4 is a waveform comparison diagram of a two-phase switching signal provided by the embodiment of the present application. Refer to Figure 2. For example, the signal acquisition module 101 is installed in a marine low-speed engine, directly opposite the side of the speed measuring gear plate at the rear end of the marine low-speed engine. Yes, it is set to collect the status signal of the first cylinder, and the status signal includes the top dead center signal and the phase signal.

The first slave control module 103 includes a signal processing unit 201, a first signal transmission unit 202 and a first driving unit 203. The signal processing unit 201 is connected to the signal acquisition module 101 and is configured to determine the marine low-speed engine based on the top dead center signal and the phase signal. The operating information of the rear-end tachometer gear plate includes real-time rotation speed and real-time phase. The first signal transmission unit 202 is connected to the signal processing unit 201 and is configured to forward the first local clock signal and operating information; the first driving unit 203 is connected to the signal processing unit 201 and is configured to control according to the first control signal of the signal processing unit 201 Corresponds to the operating status of the first cylinder.

The second slave control module 104 includes a second signal transmission unit 205, an offset compensation unit 204 and a second driving unit 206. The second signal transmission unit 205 is connected to the offset compensation unit 204 and is configured to receive and forward the first local clock signal. and operating information; the offset compensation unit 204 is connected to the second signal transmission unit 205 and is configured to generate a second control signal according to the first local clock signal and the operating information; the second driving unit 206 is connected to the offset compensation unit 204 and is configured to The operating state of the corresponding second cylinder is controlled according to the second control signal of the offset compensation unit 204 .

For example, in conjunction with Figure 3, the signal acquisition module 101 includes a first switch signal unit 207 and a second switch signal unit 208. The first switch signal unit 207 is configured according to the relative position between the first signal unit 207 and the side of the speed measuring gear plate. The distance sends out the first detection signal and forwards the first detection signal to the signal processing unit 201; the second switch signal unit 208 is configured to send out the first detection according to the distance between the second signal unit 208 and the relative position on the side of the speed measuring gear plate. signal, and forwards the first detection signal to the signal processing unit 201. The first detection signal serves as a phase signal. The first switch signal unit 207 and the second switch signal unit 208 correspond to each other. The first switch signal unit 207 and the second switch signal unit 208 may be a pair of Hall sensors with a phase difference. The first detection signal is a differential switching signal output by the Hall sensor. When the teeth in the tachometer gear plate are close to the Hall sensor, a high-level signal is generated, and when the teeth in the tachometer gear plate are far away from the Hall sensor, a low-level signal is generated. The signal processing unit 201 can filter the first detection signal sent by the first switch signal unit 207 and the second switch signal unit 208 and then perform signal analysis, and can analyze the status through a field programmable gate array (Field Programmable Gate Array, FPGA). The signals may be collected and processed, and the status signals may also be collected and processed in other ways. This is not limited by the embodiments of the present application. During the signal analysis process, the signal processing unit 201 can send out two first detection signals according to the first switch signal unit 207 and the second switch signal unit 208 to respectively determine the real-time relationship between the side of the speed measuring sprocket and the first switch signal unit 207. The switch signal of the corresponding position and the switch signal of the position corresponding to the second switch signal unit 208 in real time on the side of the speed measuring gear. The high-level signal in the switch signal indicates that the position corresponding to the switch signal unit in real time is the speed measuring gear. At the bulge of the disk, the low-level signal in the switch signal indicates that the real-time corresponding position of the switch signal unit is the recess of the speed measuring toothed disk. With reference to Figure 4, since the first switch signal unit 207 and the second switch signal unit 208 correspond to different positions on the side of the speed measuring toothed disc, there is a time difference Δt in the phase of the two switching signals during the rotation of the speed measuring toothed disc. Signal processing The unit 201 can determine the rotation direction of the speed measuring toothed disc based on the time difference Δt between the phases of the two switching signals, and can also determine the rotational speed of the speed measuring toothed disc based on the duration of one tooth cycle in any switching signal. The real-time speed includes the rotating speed. and direction of rotation.

Continuing to combine Figures 2 and 3, the signal acquisition module 101 also includes a top dead center determination unit 209. The top dead center determination unit 209 is configured to send out a third signal based on the distance between the top dead center determination unit 209 and the relative position on the side of the speed measuring gear plate. Two detection signals, a top dead center signal is generated according to the second detection signal and forwarded to the signal processing unit 201 . The top dead center determination unit 209 may be a Hall sensor with higher accuracy, and generates a top dead center signal when the distance between the top dead center determination unit 209 and the relative position on the side of the speed measuring gear is equal to a preset minimum value. The signal processing unit 201 can determine the real-time phase of the speed measuring gear plate at the rear end of the marine low-speed engine based on the top dead center signal. The position where the top dead center signal is generated may be the position where the first cylinder phase is 0°.

The first signal transmission unit 202 and the second signal transmission unit 205 may be slave modules in the EtherCAT network. The first signal transmission unit 202 can forward the real-time rotation speed, real-time phase and first local clock signal determined by the signal processing unit 201 to the main control module 102. The first signal transmission unit 202 can also receive the operating information output by the main control module 102 and The first local clock signal is forwarded to the first second slave control module 104 . The second signal transmission unit 205 may receive the operating information and the first local clock signal output by the master control module 102 and forward them to the next second slave control module 104 . The offset compensation unit 204 may include a data processing chip, and may determine the phase difference between the corresponding second cylinder and the first cylinder based on the difference between the local clock signal and the first local clock signal, and further determine the phase difference between the corresponding second cylinder and the first cylinder based on the operating information and phase of the first cylinder. The difference determines the second control signal.

The first driving unit 203 and the second driving unit 206 may be controllers. The first driving unit 203 is connected to the signal processing unit 201 and may control the operating state of the corresponding first cylinder according to the first control signal of the signal processing unit 201 . The first driving unit 203 controls the operating state of the first cylinder by controlling the operating states of the exhaust device and the fuel injection device of the first cylinder. Similarly, the second driving unit 206 is connected to the offset compensation unit 204 and can control the operating state of the corresponding second cylinder according to the second control signal of the offset compensation unit 204 . The second driving unit 206 may control the operating status of the second cylinder by controlling the operating status of the exhaust device and the fuel injection device of the second cylinder to ensure that the rotation speed and phase of the second cylinder are consistent with the first cylinder.

In the signal acquisition module in the drive control device of the marine low-speed engine provided by this embodiment, the first slave control module acquires the rotation speed and phase information of the first cylinder and the first local clock signal of the first slave control module, and converts the rotation speed and phase information and the first local clock signal is sent to the main control module. The main control module forwards the rotation speed, phase information and the first local clock information to multiple second slave control modules, so that the second slave control modules perform phase synchronization based on the first local clock information. , realizes synchronous control of the operating status of multiple cylinders in the marine low-speed engine. The second slave control module can determine the operating information corresponding to the second cylinder at this time based on the difference between the first clock signal and the local clock signal, so that the marine low-speed engine The synchronization of operating information of multiple cylinders improves the real-time communication between control modules corresponding to multiple cylinders of marine low-speed engines and the synchronization of cylinder operating status.

Figure 5 is a schematic structural diagram of another drive control device for a marine low-speed engine provided by an embodiment of the present application. Referring to Figure 5 , for example, the first signal transmission unit 202 and the second signal transmission unit 205 both include an EtherCAT slave protocol chip 501 and physical interface transceiver 502. The main control module 102 includes a main control chip 503, an Ethernet chip 504 and a physical interface transceiver 502.

For example, the main control module 102 may include a physical interface transceiver 502, an Ethernet chip 504, and a main control chip 503. The main control chip 503 is configured to control and manage the entire main control module 102, and the Ethernet chip 504 is configured to receive operating information and clock information and forward them. The first slave control module 103 includes two physical interface transceivers 502, an EtherCAT slave protocol chip 501 and a first slave control chip (an example implementation of the signal processing unit 201). The first slave control chip is configured to control the entire first slave. The control module 103 performs control and management. The EtherCAT slave protocol chip 501 in the first slave control module 103 is set for communication between the first slave control module 103 and the master control module 102 and the subsequent second slave control module 104. At the same time, the Receive the status signal collected by the signal acquisition module 101 from the control chip. Subsequent second slave control modules 104 each include one or two physical interface transceivers 502, a second slave control chip (an example implementation of the offset compensation unit 204), and an EtherCAT slave protocol chip 501. Among them, when the main control module 102 sends information in the form of a data frame to the second slave control module 104 connected to it, if a certain second slave control module 104 detects that there is no other second slave control module 104 downstream of it, the second slave control module 104 will The second slave control chip of the second slave control module 104 controls its physical interface transceiver 502 for downstream communication to close and return Ethernet frames. During the above information transmission process, the local clock of the first slave control module 103 is used as a reference clock, and the local time information of the first slave control module 103 is carried in the sending message and passed to the master control module 102 and forwarded by the master control module 102 to multiple second slave control modules 104 to achieve synchronization of clock information between multiple modules in the drive control device.

The drive control device for a marine low-speed engine provided in this embodiment uses distributed clocks to synchronize multiple second slave control modules with the local clock of the first slave control module, thus avoiding the need to use network communication to distribute data to multiple control modules. When receiving speed information and phase information, it is difficult to ensure the real-time communication and synchronization of speed phase information. At the same time, it ensures the simplicity of cable connection between multiple slave control modules that receive speed information, and improves the reception of multiple control modules in the ship. Real-time and synchronicity of rotational speed information and phase information of marine low-speed engines.

An embodiment of the present application also provides a drive control method for a marine low-speed engine. Figure 6 is a flow chart of a drive control method for a marine low-speed engine provided by an embodiment of the present application. Referring to Figure 6 , the drive control method for a marine low-speed engine includes:

S601, the signal acquisition module collects the status signal of the speed measuring gear plate of the marine low-speed engine.

S602. The first slave control module determines the operating information according to the status signal, and sends the operating information and the first local clock signal to the master control module.

S603. The main control module sends the operating information and the first local clock signal to the second slave control module and synchronizes the clock of the second slave control module in real time.

S604. The second slave control module controls the operating state of the corresponding second cylinder according to the first local clock signal and operating information.

An embodiment of the present application also provides an electronic device configured to implement the aforementioned drive control method for a marine low-speed engine. Figure 7 is a schematic structural diagram of an electronic device provided by an embodiment of the present application. Referring to Figure 7, the electronic device includes: at least one processor 701; and a memory 702 communicatively connected to the at least one processor 701; wherein the memory 702 stores A computer program that can be executed by at least one processor 701. The computer program is executed by at least one processor 701, so that at least one processor 701 can execute the aforementioned driving control method of a marine low-speed engine. The processor 701 may include a signal acquisition module, a first slave control module, a master control module and a second slave control module.

According to the drive control device, method and electronic equipment of the marine low-speed engine provided by the embodiments of the present application, the signal acquisition module provided in the marine low-speed engine can collect the status signal of the speed measuring gear plate of the marine low-speed engine, and the first slave control module can collect the status signal of the speed measuring gear plate of the marine low-speed engine. The signal determines the operating information of the speed measuring gear plate of the marine low-speed engine and records the first clock signal when the signal is collected. The main control module can control the first slave control module and the second slave control module to keep the clocks unified, and can also control the first slave control module. The operating information and the first clock signal sent by the module are forwarded to the second slave control module. The second slave control module can control the operating status of the corresponding second cylinder based on the difference between the first clock signal and the local clock, realizing multiple low-speed marine engines. For synchronous control of the operating status of two cylinders, the second slave control module can determine the operating information corresponding to the second cylinder at this time based on the difference between the first clock signal and the local clock signal, so that the operating information of multiple cylinders of the marine low-speed engine is synchronized. It improves the real-time communication between the control modules corresponding to multiple cylinders of the marine low-speed engine and the synchronization of the cylinder operating status.

The above-mentioned products can execute the methods provided by any embodiment of the present application, and have corresponding functional modules and beneficial effects for executing the methods.

Claims

A drive control device for a marine low-speed engine, including: a signal acquisition module, a main control module, a first slave control module and a plurality of second slave control modules;

The signal acquisition module is configured to collect the status signal of the speed measuring gear plate of the marine low-speed engine;

A plurality of second slave control modules are connected in sequence, the first slave control module is connected to the first second slave control module, the master control module is connected to the first slave control module, and the first slave control module is connected to the first slave control module. A slave control module is connected to the signal acquisition module, and the first slave control module is configured to determine operating information according to the status signal, and send the operating information and the first local clock signal to the main control module; The main control module is configured to send the operating information and the first local clock signal to the second slave control module via the first slave control module and synchronize the clock of the second slave control module in real time; The second slave control module is configured to control the operating state of the corresponding second cylinder in the marine low-speed engine according to the first local clock signal and the operating information.
The device according to claim 1, wherein the main control module, the first slave control module and the plurality of second slave control modules are communicated through an Ethernet control automation technology EtherCAT bus.
The device according to claim 1, wherein the signal acquisition module is arranged at the rear end of the marine low-speed engine, facing the side of the speed measuring gear plate of the marine low-speed engine, and the signal acquisition module is arranged to acquire the third The status signal of a cylinder, the status signal includes a top dead center signal and a phase signal;

The first slave control module includes a signal processing unit connected to the signal acquisition module. The signal processing unit is configured to determine the speed measurement of the marine low-speed engine based on the top dead center signal and the phase signal. The operating information of the toothed disc includes real-time rotation speed and real-time phase.
The device according to claim 3, wherein the signal acquisition module includes a first switch signal unit and a second switch signal unit, the first switch signal unit and the second switch signal unit are respectively configured to operate according to the first switch signal unit. The distance between the signal unit and the relative position on the side of the speed measuring sprocket, and the first detection signal is sent out according to the distance between the second signal unit and the relative position on the side of the speed measuring sprocket, and the third detection signal is A detection signal is forwarded to the signal processing unit, and the first detection signal is used as the phase signal.
The device according to claim 4, wherein the signal acquisition module further includes a top dead center determination unit, and the top dead center determination unit is configured to correspond to the top dead center unit and the side surface of the speed measuring gear plate relative to each other. The distance at the position emits a second detection signal, and a top dead center signal is generated according to the second detection signal and forwarded to the signal processing unit.
The device according to claim 3, wherein the first slave control module further includes a first signal transmission unit and a first driving unit, the first signal transmission unit is connected to the signal processing unit, the first The signal transmission unit is configured to forward the first local clock signal and the operating information;

The first driving unit is connected to the signal processing unit and configured to control the operating state of the corresponding first cylinder according to the first control signal of the signal processing unit.
The device according to claim 6, wherein the second slave control module includes a second signal transmission unit, an offset compensation unit and a second driving unit, the second signal transmission unit is connected to the offset compensation unit , the second signal transmission unit is configured to receive and forward the first local clock signal and the operating information;

The offset compensation unit is connected to the second signal transmission unit, and the offset compensation unit is configured to generate a second control signal according to the first local clock signal and the operating information;

The second drive unit is connected to the offset compensation unit, and the second drive unit is configured to control the operating state of the corresponding second cylinder according to the second control signal of the offset compensation unit.
The device according to claim 7, wherein the first signal transmission unit and the second signal transmission unit respectively include an EtherCAT slave protocol chip and a physical interface transceiver.
A drive control method for a marine low-speed engine, including:

The signal acquisition module collects the status signal of the speed measuring gear plate of the marine low-speed engine;

The first slave control module determines operating information according to the status signal, and sends the operating information and the first local clock signal to the master control module;

The main control module sends the operating information and the first local clock signal to the second slave control module and synchronizes the clock of the second slave control module in real time;

The second slave control module controls the operating state of the corresponding second cylinder according to the first local clock signal and the operating information.
An electronic device including:

at least one processor; and

a memory communicatively connected to the at least one processor; wherein,

The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor, so that the at least one processor can execute any one of claim 9 Drive control method of marine low-speed engine.