A drive control device, method and electronic equipment for a marine low-speed engine

Abstract

The present invention discloses a drive control device, method, and electronic device for a marine low-speed engine. The device includes a signal acquisition module, a master control module, a first slave control module, and multiple second slave control modules. The signal acquisition module acquires a status signal of a flywheel in a first cylinder. The multiple second slave control modules are connected in sequence, with the first slave control module connected to the first of the second slave control modules, and the master control module connected to the first slave control module. The first slave control module determines operating information based on the status signal and sends the operating information and a first local clock signal to the master control module. The master control module sends the operating information and the first local clock signal to the second slave control module and synchronizes the slave control module's clock in real time. The second slave control module controls the operating status of the corresponding second cylinder based on the first local clock signal and the operating information. This solution can synchronize the operating information of multiple cylinders, improving the real-time communication and the synchronization of the cylinder operating status.

Description

Technical Field

[0001] The embodiments of the present invention relate to a marine low-speed engine control technology, and in particular to a drive control device, method and electronic equipment for a marine low-speed engine. Background Art

[0002] With the development of the shipping industry, to improve the adaptability of various types of ships and provide better propulsion, marine low-speed engines are widely used in ships due to their high thermal efficiency, good economy, and easy starting. In order to achieve higher propulsion efficiency, a lower speed is required, so low-speed marine low-speed engines are often used to directly drive the propeller.

[0003] Conventional technology typically collects speed signals from marine low-speed engines using a main engine driving an encoder or a geared disc equipped with a Hall effect sensor. To enhance stability during navigation, the collected speed signals must be distributed to various controllers on board. Speed ​​signal distribution is typically accomplished in two ways: by connecting all controllers to the speed signal for signal synchronization, or by distributing the speed signals via communication, typically using a CAN network or Ethernet.

[0004] However, when all controllers are connected to the speed signal, although the synchronization of the speed signals between the controllers can be guaranteed, it requires more cables to be connected, the wiring is complicated, and it is difficult to ensure the consistency of the time control of each controller; and when using CAN network or Ethernet for communication to distribute the speed signal, it is difficult to ensure the real-time communication and the synchronization of the speed signal. Summary of the Invention

[0005] The present invention provides a drive control device, method and electronic equipment for a marine low-speed engine, so as to synchronize the operation information of multiple cylinders and improve the real-time communication and the synchronization of the cylinder operation status.

[0006] In a first aspect, an embodiment of the present invention provides a drive control device for a marine low-speed engine, the drive control device for the marine low-speed engine comprising: a signal acquisition module, a master control module, a first slave control module, and a plurality of second slave control modules;

[0007] The signal acquisition module is used to collect the status signal of the flywheel in the first cylinder of the marine low-speed engine;

[0008] Multiple second slave control modules are connected in sequence, the first slave control module is connected to the first of the second slave control modules, the main control module is connected to the first slave control module, and the first slave control module is connected to the signal acquisition module. The first slave control module is used to determine the 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 used 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 used to control the operating status of the corresponding second cylinder in the marine low-speed engine according to the first local clock signal and the operating information.

[0009] Optionally, the master control module, the first slave control module and the plurality of second slave control modules are communicatively connected via an Ethernet control automation technology bus.

[0010] Optionally, the signal acquisition module is provided on the inner wall of the first cylinder, facing the side of the flywheel in the first cylinder, and is used to collect the state signal of the first cylinder, wherein the state signal includes a top dead center signal and a phase signal;

[0011] The first slave control module includes a signal processing unit, which is connected to the signal acquisition module and is used to determine the operating information of the flywheel in the first cylinder based on the top dead center signal and the phase signal, wherein the operating information includes real-time speed and real-time phase.

[0012] Optionally, the signal acquisition module includes a first switch signal transceiver unit and a second switch signal transceiver unit, and the first switch signal transceiver unit and the second switch signal transceiver unit are both used to send a first detection signal to the relative position on the side of the flywheel, receive the reflected first detection signal and forward it to the signal processing unit, and the first detection signal serves as the phase signal.

[0013] Optionally, the signal acquisition module also includes a top dead center determination unit, which is used to send a second detection signal to the relative position on the side of the flywheel, generate a top dead center signal based on the reflected second detection signal, and forward it to the signal processing unit.

[0014] Optionally, the first slave control module further includes a first signal transmission unit and a first driving unit, wherein the first signal transmission unit is connected to the signal processing unit and is configured to forward the first local clock signal and the operation information;

[0015] The first driving unit is connected to the signal processing unit and is configured to control the operating state of the corresponding first cylinder according to a first control signal from the signal processing unit.

[0016] Optionally, the second slave control module includes a second signal transmission unit, an offset compensation unit, and a second driving unit, wherein the second signal transmission unit is connected to the offset compensation unit and is configured to receive and forward the first local clock signal and the operation information;

[0017] The offset compensation unit is connected to the second signal transmission unit, and is configured to generate a second control signal according to the first local clock signal and the operation information;

[0018] The second driving unit is connected to the offset compensation unit, and is configured to control an operating state of the corresponding second cylinder according to the second control signal of the offset compensation unit.

[0019] Optionally, the first signal transmission unit and the second signal transmission unit both include an EtherCAT slave protocol chip and a physical interface transceiver.

[0020] In a second aspect, an embodiment of the present invention further provides a drive control method for a marine low-speed engine, the drive control method for a marine low-speed engine comprising:

[0021] The signal acquisition module acquires the status signal of the flywheel in the first cylinder of the marine low-speed engine;

[0022] The first slave control module determines operation information according to the status signal, and sends the operation information and the first local clock signal to the master control module;

[0023] The master control module sends the operation 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;

[0024] 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.

[0025] In a third aspect, an embodiment of the present invention further provides an electronic device, comprising:

[0026] at least one processor; and

[0027] a memory communicatively connected to the at least one processor; wherein,

[0028] 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 drive control method for a marine low-speed engine described in the second aspect.

[0029] The drive control device, method and electronic device of the marine low-speed engine provided in this embodiment are as follows: the signal acquisition module arranged in the first cylinder of the marine low-speed engine can collect the status signal of the flywheel in the first cylinder; the first slave control module can determine the operating information of the flywheel in the first cylinder according to the status signal and record the first clock signal during signal acquisition; the main control module can control the first slave control module and the second slave control module to maintain clock uniformity, and can also forward the operating information and the first clock signal sent by the first slave control module to the second slave control module; the second slave control module can control the operating status of the corresponding second cylinder according to the difference between the first clock signal and the local clock, thereby realizing synchronous control of the operating status of multiple cylinders of the marine low-speed engine; the second slave control module can determine the operating information of the corresponding second cylinder at this time according to 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, thereby improving the real-time communication between the control modules corresponding to the multiple cylinders of the marine low-speed engine and the synchronization of the cylinder operating status. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic structural diagram of a drive control device for a marine low-speed engine provided by an embodiment of the present invention;

[0031] Figure 2 A schematic structural diagram of another drive control device for a marine low-speed engine provided by an embodiment of the present invention;

[0032] Figure 3 A schematic structural diagram of a signal acquisition module and a flywheel for a marine low-speed engine provided by an embodiment of the present invention;

[0033] Figure 4 A waveform comparison diagram of two phase switching signal provided by an embodiment of the present invention;

[0034] Figure 5 A schematic structural diagram of another drive control device for a marine low-speed engine provided by an embodiment of the present invention;

[0035] Figure 6 A flow chart of a drive control method for a marine low-speed engine provided by an embodiment of the present invention;

[0036] Figure 7 A schematic structural diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0038] An embodiment of the present invention provides a drive control device for a marine low-speed engine. Figure 1 A schematic diagram of a drive control device for a marine low-speed engine according to an embodiment of the present invention is provided. Figure 1 The drive control device 100 for a marine low-speed engine includes: a signal acquisition module 101, a main control module 102, a first slave control module 103 and a plurality of second slave control modules 104; the signal acquisition module 101 is arranged in the first cylinder of the marine low-speed engine and is used to collect the state signal of the flywheel in the first cylinder of the marine low-speed engine; the plurality of second slave control modules 104 are connected in sequence, the first slave control module 103 is connected to the first second slave control module 104, the main control module 102 is connected to the first slave control module 103, and the first slave control module 103 is connected to the signal acquisition module 101. The first slave control module 103 is used to determine the operating information according to the status signal, and send the operating information and the first local clock signal to the main control module 102; the main control module 102 is used to send the operating information and the first local clock signal to the second slave control module 104 via the first slave control module 103 and synchronize the clock of the second slave control module 104 in real time; the second slave control module 104 is used 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.

[0039] Specifically, a marine low-speed engine is a low-speed engine used on ships. For example, the marine low-speed engine can be a diesel engine. The signal acquisition module 101 is a sensor component disposed in the first cylinder of the marine low-speed engine. It can collect a status signal of the flywheel in the first cylinder. The status signal can be a phase signal and a top dead center signal. The phase signal can be a signal generated by the sensor component based on the real-time position of the flywheel corresponding to the sensor component. The top dead center signal can be a signal generated by the sensor component based on the position of the flywheel's top dead center. The first slave control module 103 can further process the status signal output by the signal acquisition module 101, determine operating information of the flywheel in the first cylinder based on the status signal, and forward the operating information and a first local clock signal to the master control module 102. The first local clock signal is a clock signal generated when the first slave control module 103 receives the status signal, and can record the time when the status signal was generated. The master control module 102 is the overall control module of the drive control device. It is connected to multiple second slave control modules 104 via a first slave control module 103 and can issue clock synchronization signals to maintain consistent local time between the first slave control module 103 and the multiple second slave control modules 104. The master control module 102 can also forward operating information and the corresponding first local clock signal to each second slave control module 104 via the first slave control module 103. Each second slave control module 104 is connected to a corresponding second cylinder in the marine low-speed engine. The number of second slave control modules 104 is the same as that of the second cylinders, and they are linked one-to-one. Based on the first local clock signal, each second slave control module 104 can determine the time difference between the local time and the time when the status signal is generated. Based on this time difference, it can determine a local control signal corresponding to the operating information. Based on the local control signal, the operating state of the corresponding second cylinder is controlled to ensure that the phase and speed of the flywheel in each second cylinder are consistent with those of the first cylinder.

[0040] The drive control device of the marine low-speed engine provided in this embodiment has a signal acquisition module arranged in the first cylinder of the marine low-speed engine, which can collect the status signal of the flywheel in the first cylinder; the first slave control module can determine the operating information of the flywheel in the first cylinder according to the status signal and record the first clock signal during signal acquisition; the main control module can control the first slave control module and the second slave control module to maintain clock uniformity, and can also forward the operating information and the first clock signal sent by the first slave control module to the second slave control module; the second slave control module can control the operating status of the corresponding second cylinder according to the difference between the first clock signal and the local clock, thereby realizing synchronous control of the operating status of multiple cylinders of the marine low-speed engine; the second slave control module can determine the operating information of the corresponding second cylinder at this time according to the difference between the first clock signal and the local clock signal, thereby synchronizing the operating information of multiple cylinders of the marine low-speed engine, thereby improving the real-time communication between the control modules corresponding to the multiple cylinders of the marine low-speed engine and the synchronization of the cylinder operating status.

[0041] Continue to refer to Figure 1 Optionally, the master control module 102, the first slave control module 103 and the plurality of second slave control modules 104 are connected to each other via an Ethernet control automation technology bus.

[0042] Specifically, the Ethernet Control Automation Technology bus, also known as the EtherCAT bus, can be understood as an Ethernet-based fieldbus. An EtherCAT network includes multiple communication nodes. When a data frame passes through an EtherCAT node, the node forwards the frame and transmits it to the next node. Upon identifying the data corresponding to that node, the node processes the data accordingly and completes the data transmission operation by inserting the required data into the data transmitted to the next node. The master control module 102, the first slave control module 103, and the multiple second slave control modules 104 can each serve as a node in the EtherCAT network. Because the time it takes for each node in an EtherCAT network to receive and transmit data is less than one microsecond, and only one frame is required to transmit and receive data between nodes on the network, the use of an EtherCAT network to network the master control module 102, the first slave control module 103, and the second slave control module 104 in the marine low-speed engine drive control device 100 ensures real-time transmission of speed information between the control modules and improves network bandwidth utilization.

[0043] The EtherCAT network also features a distributed clock function, enabling devices corresponding to each node in the EtherCAT network to use the same system time, thereby controlling the synchronous execution of tasks across these devices. In this embodiment of the present invention, 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. Specifically, the local clock of the first slave control module 103, which is directly connected to the master control module 102, is used as a reference clock, and the time information of this reference clock is used to synchronize the local clock of the second slave control module 104.

[0044] The drive control device for a marine low-speed engine provided in this embodiment adopts an EtherCAT network connection for the communication connection between the main control module, the first slave control module and the second slave control module. Each module serves as a node in the EtherCAT network. The main control module has a clock synchronization function, which can make the local clock of each second slave control module consistent with the first slave control module, thereby realizing the clock synchronization of each module in the drive control device for the marine low-speed engine, solving the problem of difficulty in ensuring the real-time communication and the synchronization of operation information when using network communication to distribute operation information to multiple slave control modules, ensuring the simplicity of the cables for the communication connection between each second slave control module that receives the operation information, and improving the real-time and synchronization of the operation information received by the slave control module corresponding to each cylinder in the marine low-speed engine.

[0045] Figure 2 This is a schematic structural diagram of another drive control device for a marine low-speed engine provided by an embodiment of the present invention. Figure 3 A schematic structural diagram of a signal acquisition module and a flywheel for a marine low-speed engine provided by an embodiment of the present invention. Figure 4 A waveform comparison diagram of two phase switch signal provided by an embodiment of the present invention, referring to Figure 2 Optionally, the signal acquisition module 101 is arranged on the inner wall of the first cylinder, facing the side of the flywheel in the first cylinder, and is used to collect the status signal of the first cylinder, where the status signal includes a top dead center signal and a phase signal.

[0046] The first slave control module 103 includes a signal processing unit 201, a first signal transmission unit 202, and a first drive unit 203. The signal processing unit 201 is connected to the signal acquisition module 101 and is configured to determine operating information of the flywheel in the first cylinder based on the top dead center signal and the phase signal. The operating information includes real-time 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 drive unit 203 is connected to the signal processing unit 201 and is configured to control the operating state of the corresponding first cylinder based on the first control signal from the signal processing unit 201.

[0047] The second slave control module 104 includes a second signal transmission unit 205, an offset compensation unit 204 and a second drive unit 206. The second signal transmission unit 205 is connected to the offset compensation unit 204 and is used 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 used to generate a second control signal based on the first local clock signal and operating information; the second drive unit 206 is connected to the offset compensation unit 204 and is used to control the operating state of the corresponding second cylinder according to the second control signal of the offset compensation unit 204.

[0048] Specifically, combined Figure 3 The signal acquisition module 101 includes a first switch signal transceiver unit 207 and a second switch signal transceiver unit 208. The first switch signal transceiver unit 207 and the second switch signal transceiver unit 208 are both used to send a first detection signal to a relative position on the side of the flywheel, receive the reflected first detection signal and forward it to the signal processing unit 201. The first detection signal serves as a phase signal. The first switch signal transceiver unit 207 and the second switch signal transceiver unit 208 correspond to each other. The first switch signal unit and the second switch signal transceiver unit 208 can be laser ranging devices that can send a detection laser signal (the first detection signal in the embodiment of the present invention) to the side of the flywheel in a preset direction, and convert the detection laser reflected by the rotating flywheel into an electrical signal and send it to the signal processing unit 201. The signal processing unit 201 can filter the first detection signal sent by the first switch signal transceiver unit 207 and the second switch signal transceiver unit 208 and then perform signal analysis. The status signal can be collected and processed by a field programmable gate array (FPGA), or the status signal can be collected and processed by other methods. The embodiment of the present invention does not limit this. In the process of signal analysis, the signal processing unit 201 can send two first detection signals based on the first switch signal transceiver unit 207 and the second switch signal transceiver unit 208 to respectively determine the switch signal of the position on the flywheel side corresponding to the first switch signal transceiver unit 207 in real time and the switch signal of the position on the flywheel side corresponding to the second switch signal transceiver unit 208 in real time. The high-level signal in the switch signal indicates that the position corresponding to the switch signal transceiver unit in real time is the protrusion of the flywheel, and the low-level signal in the switch signal indicates that the position corresponding to the switch signal transceiver unit in real time is the depression of the flywheel. Combined with Figure 4 Since the first switch signal transceiver unit 207 and the second switch signal transceiver unit 208 correspond to different positions on the side of the flywheel, there is a time difference △t between the phases of the two switch signals during the rotation of the flywheel. The signal processing unit 201 can determine the rotation direction of the flywheel in the first cylinder based on the time difference △t between the phases of the two switch signals, and can also determine the speed of the flywheel based on the duration of the high level in any switch signal. The real-time speed includes the speed and the rotation direction.

[0049] Continue to combine Figure 2 and Figure 3Signal acquisition module 101 also includes a top dead center determination unit 209, which is configured to emit a second detection signal to a relative position on the side of the flywheel, generate a top dead center signal based on the reflected second detection signal, and forward the signal to signal processing unit 201. Top dead center determination unit 209 can be a more precise laser ranging device, with a laser emission port facing the side of the flywheel. It can emit the second detection signal and receive the second detection signal reflected from the side of the flywheel. Based on the reflected second detection signal, it can determine the distance between the laser emission port and the corresponding position on the side of the flywheel, and generate a top dead center signal when the distance reaches a preset minimum value. Signal processing unit 201 can determine the real-time phase of the flywheel in the first cylinder based on the top dead center signal.

[0050] The first signal transmission unit 202 and the second signal transmission unit 205 can be slave modules in the EtherCAT network. The first signal transmission unit 202 can forward the real-time 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 and the first local clock signal output by the main control module 102 and forward them to the first second slave control module 104. The second signal transmission unit 205 can receive the operating information and the first local clock signal output by the main control module 102 and forward them to the next second slave control module 104. The offset compensation unit 204 can include a data processing chip that can 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 then determine the second control signal based on the operating information and phase difference of the first cylinder.

[0051] The first drive unit 203 and the second drive unit 206 may be controllers. The first drive unit 203 is connected to the signal processing unit 201 and can control the operating state of the corresponding first cylinder based on the first control signal of the signal processing unit 201. The first drive unit 203 may control 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 drive unit 206 is connected to the offset compensation unit 204 and can control the operating state of the corresponding second cylinder based on the second control signal of the offset compensation unit 204. The second drive unit 206 may control the operating state of the second cylinder by controlling the operating states of the exhaust device and the fuel injection device of the second cylinder to ensure that the speed and phase of the flywheel in the second cylinder are consistent with those of the first cylinder.

[0052] The signal acquisition module in the drive control device of the marine low-speed engine provided in this embodiment, the first slave control module obtains the speed and phase information of the first cylinder and the first local clock signal of the first slave control module, and sends the speed, phase information and first local clock signal to the main control module. The main control module forwards the speed, phase information and first local clock information to each second slave control module, so that the second slave control module performs phase synchronization according to the first local clock information, thereby realizing 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 of the corresponding second cylinder at this time according to 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, thereby improving the real-time communication between the control modules corresponding to the multiple cylinders of the marine low-speed engine and the synchronization of the cylinder operating status.

[0053] Figure 5 A schematic diagram of another drive control device for a marine low-speed engine according to an embodiment of the present invention is provided. Figure 5 Optionally, the first signal transmission unit 202 and the second signal transmission unit 205 each include an EtherCAT slave protocol chip 501 and a 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.

[0054] Exemplarily, the master control module 102 may include a physical interface transceiver 502, an Ethernet chip 504, and a master control chip 503. The master control chip 503 is used to control and manage the entire master control module 102, and the Ethernet chip 504 is used to receive and forward operation information and clock information. The first slave control module 103 includes two physical interface transceivers 502, an EtherCAT slave station protocol chip 501, and a first slave control chip (a specific implementation of the signal processing unit 201). The first slave control chip is used to control and manage the entire first slave control module 103. The EtherCAT slave station protocol chip 501 in the first slave control module 103 is used 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 first slave control chip receives the status signal collected by the signal acquisition module 101. Each subsequent second slave control module 104 includes one or two physical interface transceivers 502, a second slave control chip (a specific embodiment of the offset compensation unit 204), and an EtherCAT slave protocol chip 501. When the master control module 102 sends information in the form of a data frame to a second slave control module 104 connected thereto, if a second slave control module 104 detects that no other second slave control module 104 exists downstream, the second slave control chip of the second slave control module 104 controls the physical interface transceiver 502 for downstream communication to be turned off and transmits the Ethernet frame back. During the above information transmission process, the local clock of the first slave control module 103 is used as the reference clock. The local time information of the first slave control module 103 is carried in the transmitted information and transmitted to the master control module 102, which then forwards it to each second slave control module 104 to achieve synchronization of clock information between the modules in the drive control device.

[0055] The drive control device for a marine low-speed engine provided in this embodiment uses a distributed clock to synchronize the clocks of multiple second slave control modules with the local clock of the first slave control module, thereby solving the problem of difficulty in ensuring the real-time communication and the synchronization of speed and phase information when using network communication to distribute speed information and phase information to multiple control modules. At the same time, it ensures the simplicity of the cable connection between the slave control modules that receive the speed information, thereby improving the real-time and synchronization of the speed information and phase information of the marine low-speed engine received by each control module in the ship.

[0056] An embodiment of the present invention further provides a drive control method for a marine low-speed engine. Figure 6 A flow chart of a driving control method for a marine low-speed engine provided by an embodiment of the present invention, referring to Figure 6 , the drive control methods of marine low-speed engines include:

[0057] S701: The signal acquisition module acquires a status signal of a flywheel in a first cylinder of a marine low-speed engine.

[0058] S702: The first slave control module determines operation information according to the status signal, and sends the operation information and the first local clock signal to the master control module.

[0059] S703: The master control module sends the operation 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.

[0060] S704: 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.

[0061] An embodiment of the present invention further provides an electronic device for implementing the aforementioned drive control method for a marine low-speed engine. Figure 7 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention, referring to Figure 7 The electronic device includes: at least one processor 701; and a memory 702 in communication with the at least one processor 701. The memory 702 stores a computer program executable by the at least one processor 701. The computer program is executed by the at least one processor 701 to enable the at least one processor 701 to perform the aforementioned drive control method for 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.

[0062] The drive control device, method and electronic device of a marine low-speed engine provided by an embodiment of the present invention are as follows: a signal acquisition module arranged in the first cylinder of the marine low-speed engine can collect the status signal of the flywheel in the first cylinder; a first slave control module can determine the operating information of the flywheel in the first cylinder according to the status signal and record the first clock signal during signal acquisition; a main control module can control the first slave control module and the second slave control module to maintain clock uniformity, and can also forward the operating information and the first clock signal sent by the first slave control module to the second slave control module; the second slave control module can control the operating status of the corresponding second cylinder according to the difference between the first clock signal and the local clock, thereby realizing synchronous control of the operating status of multiple cylinders of the marine low-speed engine; the second slave control module can determine the operating information of the corresponding second cylinder at this time according to 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, thereby improving the real-time communication between the control modules corresponding to the multiple cylinders of the marine low-speed engine and the synchronization of the cylinder operating status.

[0063] The above-mentioned product can execute the method provided by any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0064] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, combinations, and substitutions are possible for those skilled in the art without departing from the scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A drive control device for a marine low-speed engine, characterized in that: include: A signal acquisition module, a master control module, a first slave control module, and a plurality of second slave control modules; The signal acquisition module is arranged on the inner wall of the first cylinder, facing the side of the flywheel in the first cylinder, and is used to collect the status signal of the flywheel in the first cylinder of the marine low-speed engine, wherein the status signal includes a top dead center signal and a phase signal; A plurality of second slave control modules are connected in sequence, the first slave control module is connected to the first of the second slave control modules, the master control module is connected to the first slave control module, the first slave control module is connected to the signal acquisition module, the first slave control module is used to determine operation information according to the status signal, and send the operation information and a first local clock signal to the master control module, wherein the first local clock signal is a clock signal generated when the first slave control module receives the status signal, and records the time when the status signal is generated; The master control module is used to send the operation 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 number of the second slave control modules is the same as that of the second cylinders in the marine low-speed engine and they are connected one-to-one. The second slave control modules are used to control the operating status of the corresponding second cylinders in the marine low-speed engine according to the first local clock signal and the operating information. Specifically, the second slave control module is used to determine the time difference between the local clock and the time when the status signal of the flywheel in the first cylinder is generated according to the first local clock signal, and determine the local control signal corresponding to the operating information according to the time difference, and control the operating status of the corresponding second cylinder according to the local control signal, so that the phase and speed of the flywheel in each second cylinder are consistent with those of the first cylinder.

2. The drive control device for a marine low-speed engine according to claim 1, characterized in that: The master control module, the first slave control module and the plurality of second slave control modules are communicatively connected via an Ethernet control automation technology bus.

3. The drive control device for a marine low-speed engine according to claim 1, characterized in that: The first slave control module includes a signal processing unit, which is connected to the signal acquisition module and is used to determine the operating information of the flywheel in the first cylinder based on the top dead center signal and the phase signal, wherein the operating information includes real-time speed and real-time phase.

4. The drive control device for a marine low-speed engine according to claim 3, characterized in that: The signal acquisition module includes a first switch signal transceiver unit and a second switch signal transceiver unit. The first switch signal transceiver unit and the second switch signal transceiver unit are both used to send a first detection signal to the relative position on the side of the flywheel, receive the reflected first detection signal and forward it to the signal processing unit, and the first detection signal serves as the phase signal.

5. The drive control device for a marine low-speed engine according to claim 4, characterized in that: The signal acquisition module also includes a top dead center determination unit, which is used to send a second detection signal to the relative position on the side of the flywheel, generate a top dead center signal based on the reflected second detection signal, and forward it to the signal processing unit.

6. The drive control device for a marine low-speed engine according to claim 3, characterized in that: The first slave control module further includes a first signal transmission unit and a first driving unit, wherein the first signal transmission unit is connected to the signal processing unit and is configured to forward the first local clock signal and the operation information; The first driving unit is connected to the signal processing unit and is configured to control the operating state of the corresponding first cylinder according to a first control signal from the signal processing unit.

7. The drive control device for a marine low-speed engine according to claim 6, characterized in that: The second slave control module includes a second signal transmission unit, an offset compensation unit and a second driving unit, wherein the second signal transmission unit is connected to the offset compensation unit and is configured to receive and forward the first local clock signal and the operation information; The offset compensation unit is connected to the second signal transmission unit, and is configured to generate a second control signal according to the first local clock signal and the operation information; The second driving unit is connected to the offset compensation unit, and is configured to control an operating state of the corresponding second cylinder according to the second control signal of the offset compensation unit.

8. The drive control device for a marine low-speed engine according to claim 7, characterized in that: The first signal transmission unit and the second signal transmission unit both include an EtherCAT slave protocol chip and a physical interface transceiver.

9. A drive control method for a marine low-speed engine, characterized in that: include: The signal acquisition module acquires a status signal of a flywheel in a first cylinder of a marine low-speed engine, wherein the status signal includes a top dead center signal and a phase signal; The first slave control module determines operation information according to the status signal, and sends the operation information and a first local clock signal to the master control module, wherein the first local clock signal is a clock signal generated when the first slave control module receives the status signal, and records the time when the status signal is generated; The master control module sends the operation 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 status of the corresponding second cylinder according to the first local clock signal and the operating information. Specifically, the second slave control module determines the time difference between the local clock and the time when the status signal of the flywheel in the first cylinder is generated according to the first local clock signal, and determines the local control signal corresponding to the operating information according to the time difference, and controls the operating status of the corresponding second cylinder according to the local control signal, so that the phase and speed of the flywheel in each second cylinder are consistent with those of the first cylinder.

10. An electronic device, characterized in that: The electronic device comprises: 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 the drive control method for a marine low-speed engine according to claim 9 .

Images