A method of commissioning a rudder angle indicator system for a marine mechanical rudder

Abstract

The application discloses a debugging method for a rudder angle indicator system of a marine mechanical rudder, and specifically comprises the following steps: selecting a suitable signal generator and setting an analog electric signal setting value, installing and checking a rudder angle receiver according to a drawing, connecting the signal generator and the rudder angle receiver, adjusting a cable connection according to an angle indication direction, detecting the precision of an output analog electric signal, repeating the steps until all the rudder angle receivers meet the precision requirement, installing a rudder angle transmitter on the mechanical rudder and connecting the rudder angle receiver, and further debugging the rudder angle transmitter after the mechanical rudder is unlocked. The method can be used to debug the mechanical rudder in a locked state during the construction of a ship, and is not limited by the installation integrity of the mechanical rudder system and its auxiliary equipment. The method can be applied to current type or voltage type rudder angle indicator systems. Moreover, the method can be used to perform the debugging work of a pure electric rudder angle indicator system in advance, thereby saving a large amount of debugging time and period.

Description

Technical Field

[0001] This invention belongs to the field of shipbuilding and marine engineering construction, and particularly relates to a debugging method for a rudder angle indicator system for ship mechanical rudders. Background Technology

[0002] The rudder is the primary control device of a ship, generally including the rudder blade, rudder stock, steering gear, and rudder angle gauge. The rudder angle indicator system is an instrument used to indicate the rotation angle of the rudder blade, typically consisting of a rudder angle transmitter and a rudder angle receiver. The rudder angle transmitter is installed in the steering gear compartment and is mechanically connected to the rudder stock via a linkage. The rudder angle receiver is installed in an easily observable location, and its signal input is electrically connected to the signal output of the rudder angle transmitter. When the rudder blade rotates an angle under the action of the steering gear, the rudder angle transmitter converts the rotation angle into an electrical signal and sends it to the rudder angle receiver. The rudder angle receiver then converts this electrical signal back into an angle signal and displays the corresponding angle value visually on the dial. When the mechanical rudder is set to port, the angle indication on the rudder angle receiver is left-hand (degrees); when the mechanical rudder is set to starboard (degrees), the angle indication on the receiver is right-hand (degrees). The accurate indication of the rudder angle indicator system plays an important role in the navigation safety of a ship. Generally, it is required that when the rudder blade is rotated to the zero position (i.e., the center position), the error between the angle display value on the rudder angle receiver and the angle indication value on the mechanical rudder angle scale does not exceed 0.5°. When the rudder blade is in other positions, the error between the angle display value on the rudder angle receiver and the angle indication value on the mechanical rudder angle scale does not exceed 1°. The rudder angle receiver is generally equipped with a precision adjuster for adjusting the accuracy of the angle indication.

[0003] Traditionally, the commissioning and testing of rudder angle indicator systems are constrained by the equipment installation phase and its integrity. This is because a mechanical rudder is required, where a servo motor drives the rudder blades to rotate via the rudder stick. The rudder angle transmitter converts this rotation angle into an electrical signal, which is then sent to the rudder angle receiver for display. The commissioning and testing of the rudder angle indicator system are then performed by comparing the rudder angle reading on the mechanical rudder's scale with the reading on the receiver's dial. Therefore, the rudder angle indicator system can only be commissioned and tested after the mechanical rudder is functioning correctly, the mechanical rudder's rudder angle scale is accurately adjusted, the rudder angle transmitter is installed and adjusted, and the rudder angle receiver is installed and wired, especially after the mechanical rudder's locking device has been removed.

[0004] However, in practice, in order to prevent the ship from drifting during the construction process, the mechanical rudder is locked by a locking device after it is fixedly installed in the early stage of ship construction, so it cannot operate and the rudder blade cannot rotate. Therefore, the debugging of the rudder angle indicator system is often not possible in the early stage of ship construction. It can only be debugged and tested after the locking device of the mechanical rudder is removed in the later stage of ship construction, which seriously affects the progress of the debugging project.

[0005] A Chinese invention application with publication number CN2017106501106 discloses a rudder angle indication system, which "includes a rudder angle feedback unit, a rudder angle distributor, several three-sided rudder angle indicators, several wall-mounted rudder angle indicators, and several embedded rudder angle indicators. The rudder angle feedback unit converts the mechanical rotation angle of the rudder handle into an electrical signal and sends the rudder angle data to the rudder angle distributor via a CAN bus. After receiving the CAN rudder angle signal from the rudder angle feedback unit, the rudder angle distributor drives seven independent universal output paths to output the CAN rudder angle signal to each rudder angle indicator, and each rudder angle indicator receives..." The system receives the CAN rudder angle signal from the rudder angle distributor and displays the rudder angle value. Although, "after installation and use, during servo operation, its rudder angle feedback unit can continuously update the rudder angle data via the CAN bus according to the actual change in the mechanical angle of the rudder handle, and transmit the rudder angle data to each rudder angle indicator in real time through the rudder angle distributor, ultimately achieving high-precision and reliable rudder angle indication," the debugging and installation of this rudder angle indication system still requires the servo to be in operation. The debugging process is affected by the rudder system being in a locked state after installation. Summary of the Invention

[0006] To address the problems existing in the prior art, the present invention aims to provide a debugging method for a rudder angle indicator system for a ship's mechanical rudder. This method is simple to implement and easy to operate. The debugging and inspection of the rudder angle indicator system is not limited by the completeness of the mechanical rudder system and its auxiliary equipment installation. The purely electrical rudder angle indicator system can be debugged first, and then the rudder angle transmitter can be simply adjusted after the mechanical rudder is unlocked, thus completing the debugging of the entire rudder angle indicator system. Therefore, it can save a significant amount of debugging time and cycle, and can be widely used in the debugging and inspection of ship rudder angle indicator systems.

[0007] To achieve the above and other related objectives, the present invention adopts the following technical solution:

[0008] This invention provides a method for debugging a rudder angle indicator system for a ship's mechanical rudder, comprising the following steps:

[0009] S1. Select the signal generator according to the rudder angle transmitter, and determine the analog electrical signal setpoint of the signal generator:

[0010] Based on the conversion output electrical signals of the rudder angle transmitter corresponding to different rudder blade rotation angles, a signal generator whose output analog electrical signal range includes the conversion output electrical signal range of the rudder angle transmitter is selected; based on the output electrical signals of the rudder angle transmitter including the conversion output electrical signal value a corresponding to the assumed rotation angle of the rudder blade being 45° to the left, the conversion output electrical signal value b corresponding to the assumed rotation angle of the rudder blade being 0°, and the conversion output electrical signal value c corresponding to the assumed rotation angle of the rudder blade being 45° to the right, the analog electrical signal setting values ​​of the signal generator used to detect the rudder angle receiver are sequentially selected as a, b, and c;

[0011] S2. Install the rudder angle receiver according to the drawings and check it:

[0012] Install the rudder angle receivers sequentially according to the configuration on the rudder angle indicator system drawings, and check to ensure that the position and electrical connection of all rudder angle receivers meet the requirements of the drawings;

[0013] S3. Connect the signal generator and the rudder angle receiver:

[0014] The signal output terminal of the signal generator is electrically connected to the signal input terminal of each rudder angle receiver via a two-core main cable.

[0015] S4. Adjust the cable connection of the rudder angle receiver according to the direction indicated on the rudder angle receiver:

[0016] Set the analog electrical signal value on the signal generator to any value between a and b and output it to the rudder angle receiver. Check the angle indicator on the rudder angle receiver. If the angle indicator on the rudder angle receiver is left-handed, it is determined that the analog electrical signal output of the signal generator is positive, and there is no need to adjust the cable connection between the rudder angle receiver and the signal generator. If the angle indicator on the rudder angle receiver is right-handed, it is determined that the analog electrical signal output of the signal generator is reversed, and the connection positions of the core wires of the two-core main cable are swapped.

[0017] S5. Output an analog electrical signal to the rudder angle receiver via a signal generator to detect the angle indication accuracy of the rudder angle receiver:

[0018] Set the analog electrical signal values ​​to a, b, and c sequentially on the signal generator, and output the analog electrical signal to the rudder angle receiver. Check the angle indication on the rudder angle receiver to determine whether the angle indication on the rudder angle receiver is 45° ± 1° to the left when the analog electrical signal value is a; whether the angle indication on the rudder angle receiver is 0° ± 0.5° when the analog electrical signal value is b; and whether the angle indication on the rudder angle receiver is 45° ± 1° to the right when the analog electrical signal value is c. If the angle indication on the rudder angle receiver does not meet the above judgment conditions under the above analog electrical signal values, adjust the precision adjuster inside the rudder angle receiver until it is confirmed that all rudder angle receivers meet the precision requirements. Then disconnect the cable connection between the signal generator and the rudder angle receiver.

[0019] S6. Connect the rudder angle transmitter to the mechanical rudder and electrically connect it to the rudder angle receiver:

[0020] The rudder angle transmitter is movably connected to the rudder stock via a linkage, which includes a short rod and a long rod connected together. One end of the short rod is connected to the rudder angle transmitter, and one end of the long rod is connected to the linkage connection point on the rudder stock. The position of the rudder angle transmitter is adjusted so that the short rod, the long rod, the line connecting the center of the rudder stock to the linkage connection point, and the line connecting the center of the rudder stock to the center of the rudder angle transmitter form a parallelogram. The rudder angle transmitter is then electrically connected to the rudder angle receiver.

[0021] As a preferred technical solution, after step S6, when the mechanical rudder is unlocked, step S7 is performed for supplementary debugging of the rudder angle indicator system. The specific steps include: after the mechanical rudder is unlocked, the mechanical rudder is operated and the rudder blade is rotated so that the mechanical rudder angle scale indicates 0°. The angle indication on the rudder angle receiver is checked at this time. If the angle indication on the rudder angle receiver is 0°±0.5°, the adjustment ends. If the accuracy error exceeds ±0.5°, the installation position of the rudder angle transmitter is adjusted until the angle indication on the rudder angle receiver meets 0°±0.5°. Then the rudder angle generator is fixed to complete the debugging of the rudder angle indicator system.

[0022] As a preferred technical solution, when both the rudder angle transmitter and the rudder angle receiver in the rudder angle indicator system are current-type, a signal generator capable of outputting analog current is selected for debugging the rudder angle indicator system; when both the rudder angle transmitter and the rudder angle receiver in the rudder angle indicator system are voltage-type, a signal generator capable of outputting analog voltage is selected for debugging the rudder angle indicator system.

[0023] As a preferred technical solution, in step S1, when the range of the converted output current signal of the rudder angle transmitter is 4-20 mA, the converted output current value corresponding to the assumed rotation angle of the rudder blade being 45° to the left is 4 mA, the converted output current value corresponding to the assumed rotation angle of the rudder blade being 0° is 12 mA, and the converted output current value corresponding to the assumed rotation angle of the rudder blade being 45° to the right is 20 mA. At this time, the analog current setting value of the signal generator used to detect the rudder angle receiver is selected as 4 mA, 12 mA, and 20 mA in sequence.

[0024] As a preferred technical solution, in step S1, when the range of the converted output voltage signal of the rudder angle transmitter is from -10 volts to +10 volts, the converted output voltage value corresponding to the assumed rotation angle of the rudder blade being 45° to the left is -10 volts, the converted output voltage value corresponding to the assumed rotation angle of the rudder blade being 0° is 0 volts, and the converted output voltage value corresponding to the assumed rotation angle of the rudder blade being 45° to the right is +10 volts. At this time, the analog voltage setting value of the signal generator used to detect the rudder angle receiver is sequentially selected as -10 volts, 0 volts, and +10 volts.

[0025] As described above, the present invention has the following beneficial effects:

[0026] (1) The present invention provides a debugging method for a rudder angle indicator system for a ship's mechanical rudder, which allows for the debugging of a purely electrical rudder angle indicator system when the mechanical rudder, which is fixedly installed in the early stage of ship construction, is in a locked state. This method is not limited by the integrity of the mechanical rudder system and its auxiliary equipment installation, saves the time of waiting for the mechanical rudder to be unlocked, and promotes the progress of debugging projects in ship installation and construction.

[0027] (2) The debugging method of the rudder angle indicator system for ship mechanical rudder of the present invention can be widely used in the debugging and inspection of ship rudder angle indicator system. It is applicable regardless of whether the rudder angle transmitter and rudder angle receiver used in the ship rudder angle indicator system are current type or voltage type.

[0028] (3) The present invention provides a debugging method for a rudder angle indicator system for a ship's mechanical rudder. After the mechanical rudder is released from its locked state, only a simple supplementary adjustment of the rudder angle transmitter is needed to complete the debugging of the entire rudder angle indicator system. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall installation of a rudder angle indicator system for a ship's mechanical rudder according to the present invention and the mechanical rudder.

[0030] Figure 2 This is a schematic diagram of the installation structure of a rudder angle transmitter for a ship's mechanical rudder according to the present invention.

[0031] The specific explanations of the reference numerals in the attached diagram are as follows: 1. Rudder angle transmitter; 2. Rudder angle receiver; 3. Rudder stick; 4. Rudder blade; 5. Rudder angle scale; 6. Link; 61. Short rod; 62. Long rod; 7. Link connection point; 8. Signal generator; 9. Parallel line of long rod; 10. Parallel line of short rod; 11. Rudder stick center. Detailed Implementation

[0032] To better understand the purpose, structure, and function of this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments.

[0033] In the description of this invention, it should be noted that the positional relationships indicated by terms such as "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" are based on the positional relationships shown in the accompanying drawings and are only for the purpose of facilitating the description of the embodiments of this invention and simplifying the description. They are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific direction, and therefore should not be construed as a limitation of this invention.

[0034] Example 1

[0035] like Figures 1-2 As shown, this embodiment provides a debugging method for a rudder angle indicator system for a ship's mechanical rudder.

[0036] In this embodiment, both the rudder angle transmitter 1 and the rudder angle receiver 2 selected in the rudder angle indicator system are current-type. The conversion output current range of the rudder angle transmitter 1 is 4-20 mA, and the full-scale range of the rudder angle receiver 2 is 90°, with a range of 45° to the left and 45° to the right. When the current at the signal input terminal of the rudder angle receiver 2 is 4 mA, the angle indication of the rudder angle receiver 2 is 45° to the left; when the current at the signal input terminal of the rudder angle receiver 2 is 12 mA, the angle indication of the rudder angle receiver 2 is 0°; and when the current at the signal input terminal of the rudder angle receiver 2 is 20 mA, the angle indication of the rudder angle receiver 2 is 45° to the right. The debugging method includes the following steps.

[0037] S1. Select signal generator 8 according to rudder angle transmitter 1, and determine the analog current setting value of signal generator 8:

[0038] Based on the output current range of the rudder angle transmitter 1, a signal generator 8 is selected whose output analog current range includes the output current range of the rudder angle transmitter 1. In this embodiment, since the selected rudder angle transmitter 1 has the following three angle conversion output current values: when the rudder blade 4 is assumed to rotate at a left 45°, the converted output current is 4 mA; when the rudder blade 4 is assumed to rotate at a 0°, the converted output current is 12 mA; when the rudder blade 4 is assumed to rotate at a right 45°, the converted output current is 20 mA; therefore, the signal generator 8 uses the VICTOR brand VC71A signal generator 8, which can simulate the output of a 4-20 mA current signal at the signal output terminal through the output function; at this time, the analog current setting values ​​of the signal generator 8 used to detect the rudder angle receiver 2 are sequentially selected as 4 mA, 12 mA, and 20 mA.

[0039] S2. Install rudder angle receiver 2 according to the drawings and check:

[0040] According to the configuration on the rudder angle indicator system drawing, install the rudder angle receivers 2 in sequence, and check to ensure that the position and cable connection of all rudder angle receivers 2 meet the requirements of the drawing; each rudder angle receiver 2 is connected in series to the two-core main cable used to connect the rudder angle transmitter 1, so as to ensure that when each rudder angle receiver 2 is connected to the rudder angle transmitter 1 through the two-core main cable, the output current of the rudder angle transmitter 1 can be sent to each rudder angle receiver 2 at the same time.

[0041] S3, Connect signal generator 8 and rudder angle receiver 2:

[0042] The signal output terminal of the signal generator 8 is electrically connected to the signal input terminal of each rudder angle receiver 2 via a two-core main cable.

[0043] S4. Determine the connection direction of rudder angle receiver 2:

[0044] Set a 4mA analog current value on the signal generator 8 and output it. Check if the angle indication on the rudder angle receiver 2 is correct. If the angle indication on the rudder angle receiver 2 is left degrees, it is determined that the analog current output of the signal generator 8 is positive and there is no need to adjust the cable connection between the rudder angle receiver 2 and the signal generator 8. If the angle indication on the rudder angle receiver 2 is right degrees, it is determined that the analog current output of the signal generator 8 is reversed. Then, the connection positions of the core wires of the two-core main cable are reversed.

[0045] S5. Output analog current to rudder angle receiver 2 via signal generator 8 to detect the angle indication accuracy of rudder angle receiver 2:

[0046] The signal generator 8 is sequentially set to 4 mA, 12 mA, and 20 mA analog currents, and the set analog currents are output to the rudder angle receiver 2. The angle indication on the rudder angle receiver 2 is checked sequentially. When the signal generator 8 is set and outputs a 4 mA analog current, the angle indication on the rudder angle receiver 2 is 45° to the left, and the accuracy error is less than 1°. When the signal generator 8 is set and outputs a 12 mA analog current, the angle indication on the rudder angle receiver 2 is 0°, and the accuracy error is less than 0.5°. When the signal generator 8 is set and outputs a 20 mA analog current, the angle indication on the rudder angle receiver 2 is 45° to the right, and the accuracy error is less than 1°. If the angle indication on the rudder angle receiver 2 does not meet any of the above accuracy errors, the accuracy adjuster inside the rudder angle receiver 2 is adjusted until it is confirmed that all rudder angle receivers 2 meet the accuracy requirements. Then, the connecting cable between the signal generator 8 and the rudder angle receiver 2 is disconnected.

[0047] S6. Connect the rudder angle transmitter 1 to the mechanical rudder and electrically connect it to the rudder angle receiver 2:

[0048] The rudder angle transmitter 1 is movably connected to the rudder stock 3 via a connecting rod 6, allowing the rudder angle transmitter 1 to rotate around its own axis. The connecting rod 6 includes a short rod 61 and a long rod 62 connected together. One end of the short rod 61 is connected to the rudder angle transmitter 1, and one end of the long rod 62 is connected to the connecting rod connection point 7 on the rudder stock 3. The position of the rudder angle transmitter 1 is adjusted so that the lines connecting the short rod 61, the long rod 62, the center of the rudder stock 11 to the connecting rod connection point 7, and the center of the rudder stock 11 to the center of the rudder angle transmitter 1 form a parallelogram. Figure 2 As shown, at this time, the short rod 61 is parallel to the short rod parallel line 10, and the long rod 62 is parallel to the long rod parallel line 9; connect the rudder angle transmitter 1 and the rudder angle receiver 2 with a cable;

[0049] S7. After the mechanical rudder is unlocked, perform supplementary adjustments to the rudder angle indicator system:

[0050] After the mechanical rudder is unlocked, run the mechanical rudder and rotate the rudder blade 4 until the mechanical rudder angle scale 5 indicates 0°. Check the angle indication on the rudder angle receiver 2 at this time. If the angle indication on the rudder angle receiver 2 is 0°±0.5°, the accuracy requirement is met, and the adjustment ends. If the accuracy error exceeds ±0.5°, rotate and adjust the installation angle of the rudder angle transmitter 1 until the angle indication on the rudder angle receiver 2 meets the accuracy requirement. Then, tighten the rudder angle transmitter 1 to fix it in the current position with bolts to complete the debugging of the rudder angle indicator system.

[0051] Example 2

[0052] like Figures 1-2As shown, this embodiment provides a debugging method for a rudder angle indicator system for a ship's mechanical rudder.

[0053] In this embodiment, both the rudder angle transmitter 1 and the rudder angle receiver 2 selected in the rudder angle indicator system are voltage-type. The conversion output voltage range of the rudder angle transmitter 1 is ±10 volts, and the full-scale range of the rudder angle receiver 22 is 90°, with a range of 45° to the left and 45° to the right. When the voltage at the signal input terminal of the rudder angle receiver 2 is -10 volts, the angle indication of the rudder angle receiver 2 is 45° to the left; when the voltage at the signal input terminal of the rudder angle receiver 2 is 0 volts, the angle indication of the rudder angle receiver 2 is 0°; and when the voltage at the signal input terminal of the rudder angle receiver 2 is +10 volts, the angle indication of the rudder angle receiver 2 is 45° to the right. The debugging method includes the following steps:

[0054] S1. Select signal generator 8 according to rudder angle transmitter 1, and determine the analog voltage setting value of signal generator 8:

[0055] Based on the output voltage range of the rudder angle transmitter 1, a signal generator 8 is selected whose output analog voltage range includes the output voltage range of the rudder angle transmitter 1. In this embodiment, since the selected rudder angle transmitter 1 has the following three angle conversion output voltage values: when the rudder blade 4 is assumed to rotate at a left 45°, the converted output voltage is -10 volts; when the rudder blade 4 is assumed to rotate at a 0°, the converted output voltage is 0 volts; when the rudder blade 4 is assumed to rotate at a right 45°, the converted output voltage is +10 volts; therefore, the signal generator 8 uses the VICTOR brand VC71A signal generator 8, which can simulate the output of a ±10V voltage signal at the signal output terminal through the output function; at this time, the analog voltage setting values ​​of the signal generator 8 used to detect the rudder angle receiver 2 are sequentially selected as -10 volts, 0 volts, and +10 volts;

[0056] S2. Install rudder angle receiver 2 according to the drawings and check:

[0057] According to the configuration on the rudder angle indicator system drawing, install the rudder angle receivers 2 in sequence, and check to ensure that the position and cable connection of all rudder angle receivers 2 meet the requirements of the drawing; each rudder angle receiver 2 is connected in parallel to the two-core main cable used to connect the rudder angle transmitter 1, so as to ensure that when each rudder angle receiver 2 is connected to the rudder angle transmitter 1 through the two-core main cable, the output voltage of the rudder angle transmitter 1 can be sent to each rudder angle receiver 2 at the same time.

[0058] S3, Connect signal generator 8 and rudder angle receiver 2:

[0059] The signal output terminal of the signal generator 8 is electrically connected to the signal input terminal of each rudder angle receiver 2 via a two-core main cable.

[0060] S4. Determine the connection direction of rudder angle receiver 2:

[0061] Set a negative 10 volt analog voltage value on the signal generator 8 and output it. Check if the angle indication on the rudder angle receiver 2 is correct. If the angle indication on the rudder angle receiver 2 is left degree, it is determined that the analog voltage output of the signal generator 8 is positive and there is no need to adjust the cable connection between the rudder angle receiver 2 and the signal generator 8. If the angle indication on the rudder angle receiver 2 is right degree, it is determined that the analog voltage output of the signal generator 8 is reversed. Then, the connection positions of the core wires of the two-core main cable are reversed.

[0062] S5. Output an analog voltage to the rudder angle receiver 2 via the signal generator 8 to detect the angle indication accuracy of the rudder angle receiver 2:

[0063] The signal generator 8 is sequentially set to a negative 10 volt analog voltage, a 0 volt analog voltage, and a positive 10 volt analog voltage, and the set analog voltage is output to the rudder angle receiver 2. The angle indication on the rudder angle receiver 2 is checked sequentially to determine whether the angle indication on the rudder angle receiver 2 is 45° to the left and the accuracy error is less than 1° when the negative 10 volt analog voltage is set and output on the signal generator 8; whether the angle indication on the rudder angle receiver 2 is 0° and the accuracy error is less than 0.5° when the rudder angle receiver 2 is set and output on the signal generator 8; and whether the angle indication on the rudder angle receiver 2 is 45° to the right and the accuracy error is less than 1° when the positive 10 volt analog voltage is set and output on the signal generator 8. If the angle indication on the rudder angle receiver 2 does not meet any of the above accuracy errors, the accuracy adjuster inside the rudder angle receiver 2 is adjusted, and the connecting cable between the signal generator 8 and the rudder angle receiver 2 is disconnected.

[0064] S6. Connect the rudder angle transmitter 1 to the mechanical rudder and electrically connect it to the rudder angle receiver 2:

[0065] The rudder angle transmitter 1 is movably connected to the rudder stock 3 via a connecting rod 6, allowing the rudder angle transmitter 1 to rotate around its own axis. The connecting rod 6 includes a short rod 61 and a long rod 62 connected together. One end of the short rod 61 is connected to the rudder angle transmitter 1, and one end of the long rod 62 is connected to the connecting rod connection point 7 on the rudder stock 3. The position of the rudder angle transmitter 1 is adjusted so that the lines connecting the short rod 61, the long rod 62, the center of the rudder stock 11 to the connecting rod connection point 7, and the center of the rudder stock 11 to the center of the rudder angle transmitter 1 form a parallelogram. Figure 2 As shown, at this time, the short rod 61 is parallel to the short rod parallel line 10, and the long rod 62 is parallel to the long rod parallel line 9; connect the rudder angle transmitter 1 and the rudder angle receiver 2 with a cable;

[0066] S7. After the mechanical rudder is unlocked, perform supplementary adjustments to the rudder angle indicator system:

[0067] After the mechanical rudder is unlocked, run the mechanical rudder and rotate the rudder blade 4 until the mechanical rudder angle scale 5 indicates 0°. Check the angle indication on the rudder angle receiver 2 at this time. If the angle indication on the rudder angle receiver 2 is 0°±0.5°, the accuracy requirement is met, and the adjustment ends. If the accuracy error exceeds ±0.5°, adjust the installation position of the rudder angle transmitter 1 until the angle indication on the rudder angle receiver 2 meets the accuracy requirement. Then, tighten the rudder angle transmitter 1 to fix it in the current position with bolts to complete the debugging of the rudder angle indicator system.

[0068] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Those skilled in the art can make various changes or equivalent substitutions to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of this invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are protected by this invention.

Claims

1. A method for debugging a rudder angle indicator system for a ship's mechanical rudder, characterized in that, Includes the following steps: S1. Select the signal generator (8) according to the rudder angle transmitter (1), and determine the analog electrical signal setting value of the signal generator (8): Based on the conversion output electrical signal corresponding to the rudder angle transmitter (1) when the rudder blade (4) rotates at different angles, a signal generator (8) whose output analog electrical signal range includes the conversion output electrical signal range of the rudder angle transmitter (1) is selected; based on the output electrical signal of the rudder angle transmitter (1), including the conversion output electrical signal value a corresponding to the rudder blade (4) when the assumed rotation angle is 45° to the left, the conversion output electrical signal value b corresponding to the rudder blade (4) when the assumed rotation angle is 0°, and the conversion output electrical signal value c corresponding to the rudder blade (4) when the assumed rotation angle is 45° to the right, the analog electrical signal setting values ​​of the signal generator (8) used to detect the rudder angle receiver (2) are sequentially selected as a, b, and c; S2. Install the rudder angle receiver (2) according to the drawings and check it: Install the rudder angle receivers (2) sequentially according to the configuration on the rudder angle indicator system drawing, and check to ensure that the position and electrical connection of all rudder angle receivers (2) meet the requirements of the drawing; S3. Connect the signal generator (8) and the rudder angle receiver (2): The signal output terminal of the signal generator (8) is electrically connected to the signal input terminal of each rudder angle receiver (2) via a two-core main cable. S4. Adjust the cable connection of the rudder angle receiver (2) according to the angle indication direction on the rudder angle receiver (2): Set the analog electrical signal value on the signal generator (8) to any electrical signal value between a and b and output it to the rudder angle receiver (2). Check the angle indicator on the rudder angle receiver (2). If the angle indicator on the rudder angle receiver (2) is left degree, it is determined that the analog electrical signal output of the signal generator (8) is positive and there is no need to adjust the cable connection between the rudder angle receiver (2) and the signal generator (8). If the angle indicator on the rudder angle receiver (2) is right degree, it is determined that the analog electrical signal output of the signal generator (8) is reversed and the core wire connection positions of the two-core main cable are reversed. S5. Output an analog electrical signal to the rudder angle receiver (2) through the signal generator (8) to detect the angle indication accuracy of the rudder angle receiver (2): Set the analog electrical signal values ​​to a, b and c in sequence on the signal generator (8), and output the analog electrical signal to the rudder angle receiver (2). Check the angle indication on the rudder angle receiver (2) to determine whether the angle indication on the rudder angle receiver (2) is 45° ± 1° to the left when the analog electrical signal value is a; determine whether the angle indication on the rudder angle receiver (2) is 0° ± 0.5° when the analog electrical signal value is b; determine whether the angle indication on the rudder angle receiver (2) is 45° ± 1° to the right when the analog electrical signal value is c. If the angle indication on the rudder angle receiver (2) does not meet the above judgment conditions under the above analog electrical signal values, adjust the precision adjuster inside the rudder angle receiver (2) until it is confirmed that all rudder angle receivers (2) meet the precision requirements, and then disconnect the cable connection between the signal generator (8) and the rudder angle receiver (2). S6. Connect the rudder angle transmitter (1) to the mechanical rudder and electrically connect it to the rudder angle receiver (2): The rudder angle transmitter (1) is movably connected to the rudder stock (3) via a connecting rod (6). The connecting rod (6) includes a short rod (61) and a long rod (62) connected together. One end of the short rod (61) is connected to the rudder angle transmitter (1), and one end of the long rod (62) is connected to the connecting rod connection point (7) on the rudder stock (3). The position of the rudder angle transmitter (1) is adjusted so that the line connecting the short rod (61), the long rod (62), the center of the rudder stock (11) to the connecting rod connection point (7), and the line connecting the center of the rudder stock (11) to the center of the rudder angle transmitter (1) form a parallelogram. The rudder angle transmitter (1) is electrically connected to the rudder angle receiver (2).

2. The debugging method for a rudder angle indicator system for a ship's mechanical rudder according to claim 1, characterized in that, After step S6, when the mechanical rudder is unlocked, step S7 is performed to supplement the debugging of the rudder angle indicator system. The specific steps include: when the mechanical rudder is unlocked, run the mechanical rudder and rotate the rudder blade (4) so ​​that the mechanical rudder angle scale (5) indicates 0°. Check the angle indication on the rudder angle receiver (2) at this time. If the angle indication on the rudder angle receiver (2) is 0°±0.5°, the adjustment ends. When the accuracy error exceeds ±0.5°, adjust the installation position of the rudder angle transmitter (1) until the angle indication on the rudder angle receiver (2) meets 0°±0.5°. Then fix the rudder angle transmitter (1) to complete the debugging of the rudder angle indicator system.

3. The debugging method for a rudder angle indicator system for a ship's mechanical rudder according to claim 1, characterized in that, When both the rudder angle transmitter (1) and the rudder angle receiver (2) in the rudder angle indicator system are current-type, a signal generator (8) that can output analog current is selected for debugging the rudder angle indicator system; when both the rudder angle transmitter (1) and the rudder angle receiver (2) in the rudder angle indicator system are voltage-type, a signal generator (8) that can output analog voltage is selected for debugging the rudder angle indicator system.

4. The debugging method for a rudder angle indicator system for a ship's mechanical rudder according to claim 1, characterized in that, In step S1, when the range of the conversion output current signal of the rudder angle transmitter (1) is 4-20 mA, the conversion output current value corresponding to the rudder blade (4) when the assumed rotation angle is 45° to the left is 4 mA, the conversion output current value corresponding to the rudder blade (4) when the assumed rotation angle is 0° is 12 mA, and the conversion output current value corresponding to the rudder blade (4) when the assumed rotation angle is 45° to the right is 20 mA. At this time, the analog current setting value of the signal generator (8) used to detect the rudder angle receiver (2) is selected as 4 mA, 12 mA and 20 mA in sequence.

5. The debugging method for a rudder angle indicator system for a ship's mechanical rudder according to claim 1, characterized in that, In step S1, when the range of the conversion output voltage signal of the rudder angle transmitter (1) is from -10 volts to +10 volts, the conversion output voltage value corresponding to the rudder blade (4) assuming a rotation angle of 45° to the left is -10 volts, the conversion output voltage value corresponding to the rudder blade (4) assuming a rotation angle of 0° is 0 volts, and the conversion output voltage value corresponding to the rudder blade (4) assuming a rotation angle of 45° to the right is +10 volts. At this time, the analog voltage setting value of the signal generator (8) used to detect the rudder angle receiver (2) is sequentially selected as -10 volts, 0 volts, and +10 volts.

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