Marine cabin door measurement and control system

Abstract

The invention belongs to the technical field of ship engineering, and particularly discloses a ship cabin door measurement and control system which comprises a controller, a power driving unit, a rotating actuator, a transmission device, a deceleration braking device and a position feedback unit. The controller is provided with a two-channel control system, the two-channel control system independently carries out discrete signal and sensor signal acquisition work and calculation work of the main control module, data exchange and synchronization are carried out between the channel control systems through a two-port RAM, and the channel control systems jointly monitor the cabin door measurement and control system for the ship. Through the redundancy design of the double-channel control system and the combination of multiple sensors, when one channel control system breaks down, the other channel control system can continue to work normally, it can be ensured that the cabin door can be accurately closed under various conditions, and the situation that water enters a ship and other potential safety hazards are caused due to the fact that the cabin door is not closed is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of ship engineering, and in particular to a ship hatch measurement and control system. Background Art

[0002] Ships have increasingly higher requirements for the reliability and safety of hatch door systems. When a ship leaks, if the watertight door fails to close completely, the ship will sink, causing serious consequences. When the ship is under lighting control, whether the deck weathertight door is completely closed will directly affect the lighting control effect, thereby affecting navigation safety in severe weather conditions or at night. Summary of the invention

[0003] The purpose of the present invention is to solve the technical problems existing in the background technology. To this end, a ship door measurement and control system is provided to achieve precise control and status monitoring of the door. The reliability requirements of the door measurement and control system are met through signal redundancy design, thereby further ensuring the navigation safety of the ship.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] A marine hatch door measurement and control system comprises a controller, a power drive unit, a rotary actuator, a transmission device, a deceleration brake device and a position feedback unit;

[0006] The power drive unit, the position feedback unit and the deceleration and braking device are all electrically connected to the controller, the power drive unit is electrically connected to the rotary actuator, the rotary actuator is connected to the cabin door through the transmission device, and the deceleration and braking device is connected to the cabin door through the transmission device;

[0007] The controller receives the sensor signal of the position feedback unit and sends a rotation command or a stop command to the power drive unit;

[0008] When the power drive unit receives the rotation instruction from the controller, it drives the rotary actuator to rotate, and through the transmission action of the transmission device, it drives the door to rotate;

[0009] When the power drive unit receives a stop command from the controller, the rotary actuator stops rotating. At the same time, the controller sends a braking command to the deceleration braking device, and the deceleration braking device performs a braking action, thereby stopping the rotation of the door through the transmission action of the transmission device.

[0010] The following is a technical solution further defined by the present invention, wherein the controller has a dual-channel control system, which independently performs discrete signal and sensor signal acquisition work and calculation work of the main control module, and each channel control system exchanges and synchronizes data through a dual-port RAM to jointly monitor the ship hatch measurement and control system.

[0011] The following is a technical solution further defined by the present invention, each channel control system includes an interface module, a main control module, a power module, an output module and a power drive module;

[0012] The interface module, power module and output module are all electrically connected to the main control module;

[0013] The interface module, main control module, output module and power drive module are all electrically connected to the power supply module;

[0014] The output module is electrically connected to the power driving module.

[0015] The following is a technical solution further defined by the present invention: the main control modules of each channel control system exchange data via a dual-port RAM, and the dual-port RAM has two groups of independent data lines, address lines and control lines.

[0016] The following is a technical solution further defined by the present invention, wherein the power drive unit includes two independent hydraulic drive devices, which are respectively controlled by a dual-channel control system, each hydraulic drive device includes an electro-hydraulic servo valve, a solenoid valve and a hydraulic motor, and the hydraulic drive device is electrically connected to the power drive module.

[0017] The following is a technical solution further defined by the present invention. The sensors of the position feedback unit include but are not limited to angular displacement sensors, linear displacement sensors and in-position micro switches. Each channel control system collects data on the solenoid valve, electro-hydraulic servo valve, angular displacement sensor, linear displacement sensor, in-position micro switch and travel limit switch.

[0018] The following is a technical solution further defined by the present invention, in which each channel control system receives the position information provided by the position feedback unit, the main control module sends a position command signal to the output module, the output module obtains the output signal after being processed by the PID algorithm, the speed control of the cabin door is realized by controlling the current of the electro-hydraulic servo valve, and whether the cabin door is completely closed is judged by the open and closed state of the in-position micro switch, and the rotation angle of the cabin door is limited by the travel limit switch.

[0019] The following is a technical solution further defined by the present invention. The power module converts AC power into two 28V DC power supplies, which are used to power a dual-channel control system respectively, and is converted into 5V, ±15V power supplies and secondary power supplies through a DC-DC module, and a diode is added to prevent reverse connection.

[0020] The following is a technical solution further defined by the present invention: the control signal of the main control module is converted from digital to analog through the output module, and the voltage signal is converted into a current signal through the voltage-current conversion circuit, thereby controlling the opening of the electro-hydraulic servo valve; a sampling resistor is connected in series in the voltage-current conversion circuit to collect the voltage drop across the resistor to complete the monitoring of the current of the electro-hydraulic servo valve; MOSFET is used as a driving circuit, and the control of the solenoid valve is achieved by controlling the on-off of the MOSFET; a current sampling resistor is connected in series to the SOV loop valve loop busbar, and the current of the solenoid valve is monitored by collecting the voltage across the sampling resistor.

[0021] The following is a technical solution further defined by the present invention, which also includes a fault detection module for real-time monitoring and diagnosis of system faults, and when a fault is detected, an alarm is issued through an audible and visual alarm system, and the fault information is transmitted to a central control room; the hatch sensor signal collected by the controller is transmitted to a ship navigation data recorder via serial communication.

[0022] Compared with the prior art, the present invention has the following technical effects:

[0023] 1) The present invention adopts a redundant design of a dual-channel control system and a combination of multiple sensors. When a single channel control system fails, the other channel control system can continue to work normally, thereby ensuring that the hatch can be accurately closed under various circumstances, avoiding water ingress into the ship and other safety hazards due to the failure of the hatch to close.

[0024] 2) The present invention monitors the hatch status by integrating a fault detection and alarm system, and can accurately locate the location where the fault occurs, so that the fault can be discovered and handled immediately, thereby improving the overall safety of the ship.

[0025] 3) The measurement and control system designed in the present invention is easy to maintain and replace, and each module can be disassembled and replaced independently, which simplifies the maintenance process and improves the maintainability and expandability of the system.

[0026] 4) The present invention adopts advanced control algorithms (such as PID control) combined with multi-sensor data fusion technology to achieve high-precision control of the door position and rotation speed, ensuring smooth and accurate movement of the door.

[0027] 5) In the event of ship lighting control or other emergency situations, the measurement and control system of the present invention can respond quickly and take corresponding measures to ensure that the hatch is closed or opened in the shortest time possible to ensure the safety of the ship and personnel.

[0028] The present invention is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a system principle architecture diagram of the present invention;

[0031] Figure 2 It is a principle architecture diagram of the dual-channel control system of the present invention;

[0032] Figure 3 is a schematic diagram of power conversion principle of the present invention;

[0033] Figure 4 It is the principle diagram of the main control module of the present invention;

[0034] Figure 5 It is the control principle diagram of the solenoid valve of the present invention;

[0035] Figure 6 It is a functional architecture diagram of the controller of the present invention. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0037] like Figure 1 As shown, a marine hatch door measurement and control system is provided, which mainly includes a controller (hatch door controller), a power drive unit, a rotary actuator, a transmission device, a deceleration brake device and a position feedback unit. The controller receives the sensor signal of the position feedback unit and sends a rotation command or a stop command to the power drive unit; when the power drive unit receives the rotation command of the controller, it drives the rotary actuator to rotate, and through the transmission action of the transmission device, the hatch door is driven to rotate; when the power drive unit receives the stop command of the controller, the rotary actuator stops rotating, and at the same time, the controller sends a braking command to the deceleration brake device, and the deceleration brake device performs a braking action, and through the transmission action of the transmission device, the rotation action of the hatch door is stopped.

[0038] like Figure 2 As shown, the controller has a dual-channel control system: a channel A control system and a channel B control system.

[0039] The channel A control system includes an interface module A, a main control module, a power module A, an output module A and a power drive module A. The channel B control system includes an interface module B, a main control module, a power module B, an output module B and a power drive module B.

[0040] The channel A control system and the channel B control system independently collect discrete signals and sensor signals and perform calculations in the main control module. The main control module of the channel A control system and the main control module of the channel B control system exchange and synchronize data through the dual-port RAM to jointly monitor the marine hatch door measurement and control system. The dual-port RAM has two independent data lines, address lines, and control lines.

[0041] The channel A control system collects data from the position feedback unit A, angular displacement sensor A, linear displacement sensor A, in-position micro switch A, and travel limit switch A. The channel B control system collects data from the position feedback unit B, angular displacement sensor B, linear displacement sensor B, in-position micro switch B, and travel limit switch B.

[0042] The power drive unit includes two independent hydraulic drive devices, namely hydraulic drive device A and hydraulic drive device B. Hydraulic drive device A is controlled by channel A control system, and hydraulic drive device B is controlled by channel B control system. Each hydraulic drive device includes independent electro-hydraulic servo valves, solenoid valves and hydraulic motors, and adopts a master-master working mode (i.e., the operation of each hydraulic drive device does not affect each other). The hydraulic drive device is electrically connected to the power drive module.

[0043] Each channel control system receives the position information provided by the position feedback unit. The main control module sends a position command signal to the output module. The output module obtains the output signal after processing by the PID algorithm. The speed control of the cabin door is achieved by controlling the current of the electro-hydraulic servo valve. The open and closed state of the in-position microswitch is used to determine whether the cabin door is completely closed. The travel limit switch is used to limit the rotation angle of the cabin door to prevent the cabin door from rotating without limit, thereby ensuring the reliability of the cabin door movement.

[0044] The feedback signals received by the controller are all redundantly designed, and the feedback signals are sent to the channel A control system and the channel B control system for processing. Each channel control system collects data from the solenoid valve, electro-hydraulic servo valve, angular displacement sensor, linear displacement sensor, in-position micro switch and travel limit switch. The detection accuracy and reliability are improved through multi-sensor data fusion technology, and the dynamic adjustment of the hatch control strategy is adopted to improve the adaptability and intelligence of the system.

[0045] like Figure 3As shown, the power module converts AC power into two 28V DC power supplies, which are used to power the dual-channel control system respectively, and are converted into 5V, ±15V power supplies and secondary power supplies through the DC-DC module. A diode is set at the input end of the module for reverse connection protection.

[0046] like Figure 4 As shown, the main control module mainly completes the functions of synchronization, discrete quantity processing, analog signal acquisition, dual-port RAM communication, control law calculation, power drive, etc.

[0047] The control signal of the main control module is converted from digital to analog through the output module, and then converted into a current signal through the voltage-current conversion circuit, thereby controlling the opening of the electro-hydraulic servo valve. A sampling resistor is connected in series in the voltage-current conversion circuit to collect the voltage drop across the resistor and complete the monitoring of the current of the electro-hydraulic servo valve.

[0048] like Figure 5 As shown, MOSFET is used as the driving circuit, and the solenoid valve is controlled by controlling the on-off of MOSFET. A current sampling resistor is connected in series with the SOV loop valve loop busbar, and the solenoid valve current is monitored by collecting the voltage across the sampling resistor.

[0049] like Figure 6 As shown in the figure, the fault detection module is used to monitor and diagnose system faults in real time, and when a fault is detected, an alarm is issued through the sound and light alarm system, and the fault information is transmitted to the central control room; the hatch sensor signal collected by the controller is transmitted to the ship's navigation data recorder through serial communication. The hatch controller receives the light control status information. When the ship is in the light control state, if the hatch door is not completely closed, an sound and light alarm will be issued, and the alarm information will be sent to the central control room.

[0050] The data storage unit is used to store historical data, which can realize the traceability analysis of the hatch opening and closing operation, and optimize the control algorithm through big data analysis to improve the efficiency and safety of hatch operation.

[0051] By adopting wireless communication technology, the hatch status data can be wirelessly transmitted to the remote monitoring center, realizing remote monitoring and control of the ship's hatch.

[0052] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the above disclosed methods and technical contents without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, all equivalent changes made according to the shape, structure and principle of the present invention without departing from the content of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A ship hatch door measurement and control system, characterized in that: It includes a controller, a power drive unit, a rotary actuator, a transmission device, a deceleration brake device and a position feedback unit; The power drive unit, the position feedback unit and the deceleration and braking device are all electrically connected to the controller, the power drive unit is electrically connected to the rotary actuator, the rotary actuator is connected to the cabin door through the transmission device, and the deceleration and braking device is connected to the cabin door through the transmission device; The controller receives the sensor signal of the position feedback unit and sends a rotation command or a stop command to the power drive unit; When the power drive unit receives the rotation instruction from the controller, it drives the rotary actuator to rotate, and through the transmission action of the transmission device, it drives the door to rotate; When the power drive unit receives a stop command from the controller, the rotary actuator stops rotating. At the same time, the controller sends a braking command to the deceleration braking device, and the deceleration braking device performs a braking action, thereby stopping the rotation of the door through the transmission action of the transmission device.

2. A marine hatch door measurement and control system as claimed in claim 1, characterized in that: The controller has a dual-channel control system, which independently collects discrete signals and sensor signals and performs calculations on the main control module. Each channel control system exchanges and synchronizes data through a dual-port RAM to jointly monitor the marine hatch measurement and control system.

3. A marine hatch door measurement and control system as claimed in claim 2, characterized in that: Each channel control system includes an interface module, a main control module, a power module, an output module and a power drive module; The interface module, power module and output module are all electrically connected to the main control module; The interface module, main control module, output module and power drive module are all electrically connected to the power supply module; The output module is electrically connected to the power driving module.

4. A marine hatch door measurement and control system as claimed in claim 3, characterized in that: The main control modules of each channel control system exchange data through a dual-port RAM, which has two sets of independent data lines, address lines and control lines.

5. A marine hatch door measurement and control system as claimed in claim 3, characterized in that: The power drive unit includes two independent hydraulic drive devices, which are respectively controlled by a dual-channel control system. Each hydraulic drive device includes an electro-hydraulic servo valve, a solenoid valve and a hydraulic motor. The hydraulic drive device is electrically connected to the power drive module.

6. A marine hatch door measurement and control system as claimed in claim 5, characterized in that: The sensors of the position feedback unit include but are not limited to angular displacement sensors, linear displacement sensors and in-position micro switches. Each channel control system collects data from the solenoid valve, electro-hydraulic servo valve, angular displacement sensor, linear displacement sensor, in-position micro switch and travel limit switch.

7. A marine hatch door measurement and control system as claimed in claim 6, characterized in that: Each channel control system receives the position information provided by the position feedback unit. The main control module sends a position command signal to the output module. The output module obtains the output signal after processing by the PID algorithm. The speed control of the cabin door is achieved by controlling the current of the electro-hydraulic servo valve. The opening and closing state of the in-position microswitch is used to determine whether the cabin door is completely closed. The rotation angle of the cabin door is limited by the travel limit switch.

8. A marine hatch door measurement and control system as claimed in claim 3, characterized in that: The power module converts AC power into two 28V DC power supplies, which are used to power the dual-channel control system respectively. The DC-DC module converts the AC power into 5V, ±15V power supply and secondary power supply, and adds diodes to prevent reverse connection.

9. A ship hatch door measurement and control system as claimed in claim 3, characterized in that: The control signal of the main control module is converted from digital to analog through the output module, and then converted into a current signal through the voltage-current conversion circuit, thereby controlling the opening of the electro-hydraulic servo valve. A sampling resistor is connected in series in the voltage-current conversion circuit to collect the voltage drop across the resistor and monitor the current of the electro-hydraulic servo valve. MOSFET is used as the driving circuit, and the solenoid valve is controlled by controlling the on-off of the MOSFET. A current sampling resistor is connected in series in the SOV loop valve loop busbar, and the solenoid valve current is monitored by collecting the voltage across the sampling resistor.

10. A ship hatch door measurement and control system as claimed in claim 3, characterized in that: It also includes a fault detection module, which is used to monitor and diagnose system faults in real time, and sound an alarm through the sound and light alarm system when a fault is detected, and transmit the fault information to the central control room; the hatch sensor signal collected by the controller is transmitted to the ship's navigation data recorder through serial communication.

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