Method and system for evaluating the energy efficiency of a ship steering gear based on data from the steering gear

Abstract

In the method and system for evaluating the energy efficiency of a ship rudder device based on device data, the rudder operation data during the ship operation is monitored and collected, then data verification is performed, followed by preprocessing to obtain unified operation data, then the data is calculated using a rudder energy efficiency calculation model to obtain an instantaneous energy efficiency ratio, the data calculation result is verified, and an average energy efficiency ratio is calculated, then the energy efficiency level is divided to display the energy efficiency level of the rudder device; in application, the energy efficiency ratio data of the ship is obtained in time through real-time data collection and calculation, so that the energy consumption state of the ship rudder can be obtained by the staff in the first time, so as to evaluate and adjust the energy consumption anomaly of the ship rudder, achieve the purpose of energy saving and consumption reduction, and the data is verified during the calculation process, ensuring the accuracy of the calculation result. Therefore, the design can not only judge the equipment energy consumption in time, but also accurately feedback the equipment energy efficiency level.

Description

Technical Field

[0001] This invention relates to a method for calculating energy efficiency ratio, belonging to the field of marine equipment, and particularly to a method and system for evaluating the energy efficiency of ship steering gear equipment based on data from ship steering gear equipment. Background Technology

[0002] As the main source of energy consumption for ships, remote monitoring, analysis, and assessment of ship equipment energy consumption are effective means to achieve carbon emission reduction and improve ship management. Conducting ship equipment energy efficiency monitoring and assessment is of great significance for reducing carbon emissions and operating costs, and improving the level of ship equipment energy efficiency management.

[0003] Under ideal conditions, the working efficiency of a ship's steering gear is equal to its rated power, and there is no power loss. However, in actual operation, due to various factors such as on-site working conditions and navigation status, the actual working efficiency of the steering gear often fails to reach the rated power, resulting in varying degrees of power waste. Therefore, how to save energy and reduce consumption is an important issue in the use of ship steering gear.

[0004] Researching energy conservation and emission reduction requires understanding the current energy efficiency of equipment. The energy efficiency of steering gear equipment depends not only on the manufacturing quality of the equipment itself but also on the ship's operating status, rudder angle, and the operating conditions of the motors. Therefore, high-frequency monitoring of the steering gear's operating status and calculation and analysis of the energy efficiency monitoring results are crucial. This allows users to adjust or maintain the steering gear based on the energy efficiency calculation and analysis results, achieving energy conservation and emission reduction goals. However, currently, abnormal energy consumption of steering gear equipment is mainly determined manually. Manual judgment has a certain time lag and cannot accurately reflect the equipment's energy efficiency level, resulting in poor energy-saving effects for ship equipment.

[0005] The information disclosed in this background section is intended only to enhance understanding of the overall background of this application and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to overcome the defects and problems in the existing technology, such as the lag in judging energy efficiency anomalies and the inability to accurately reflect the energy efficiency level of equipment. It provides a method and system for evaluating the energy efficiency of ship steering gear equipment based on data, which can not only judge energy efficiency and energy consumption in a timely manner, but also accurately reflect the energy efficiency level of equipment.

[0007] To achieve the above objectives, the technical solution of the present invention is: a method for evaluating the energy efficiency of ship steering gear equipment based on ship steering gear equipment data, the method comprising:

[0008] S1. Real-time monitoring and collection of steering gear operation data during ship operation;

[0009] S2. Perform data verification on the running data; if there are any abnormalities in the running data, report the abnormal data; if there are no abnormalities in the running data, preprocess it to obtain unified running data.

[0010] S3. Based on unified operating data, the instantaneous energy efficiency ratio is obtained by using the servo motor energy efficiency calculation model.

[0011] S4. Verify the data calculation results based on the instantaneous energy efficiency ratio; if there are any abnormalities in the calculation results, report the abnormal data; if there are no abnormalities in the calculation results, proceed to step S5.

[0012] S5. Based on the instantaneous energy efficiency ratio, the average energy efficiency calculation model is used to calculate and obtain the average energy efficiency ratio.

[0013] S6. Classify energy efficiency levels based on average energy efficiency ratio, and display the energy efficiency level of servo motor equipment based on the energy efficiency level.

[0014] In step S1, the operating data of the steering gear during ship operation includes: flow rate, cylinder pressure, steering angle, steering time, and power factor.

[0015] In step S2, the data verification of the running data refers to:

[0016] Through data warehousing, a multi-threaded mechanism is used during the receiving process to verify the validity range of the operating data according to the working threshold of the ship's equipment. If the operating data is within the working threshold of the ship's equipment, it means that the relevant ship's equipment is operating normally. If the operating data is outside the working threshold of the ship's equipment or is empty, it means that the relevant ship's equipment is operating abnormally or the data acquisition equipment is malfunctioning, and the abnormal operating data is reported back.

[0017] In step S2, the preprocessing refers to rounding, deduplication, or normalization of the running data.

[0018] In step S3, the servo motor energy efficiency calculation model is as follows:

[0019]

[0020] Where: P in For input power, P out To output useful power;

[0021]

[0022] Where: n in U represents the number of working motors. in I is the input voltage to the motor. inFor current, Power factor;

[0023]

[0024] Δθ=|θ1-θ2|;

[0025]

[0026] Where: p1, p2, p3, and p4 are the real-time oil pressure values ​​of multiple cylinders, S ram R is the cross-sectional area of ​​the plunger. tiller Δθ is the radius of the rudder arm, Δθ is the change in rudder angle from θ1 to θ2 in radians during the monitoring period, Δt is the time of change in rudder angle from θ1 to θ2 during the monitoring period, and θ1 and θ2 are the rudder angle radians at the start of any steering maneuver.

[0027] In step S4, verifying the data calculation results based on the instantaneous energy efficiency ratio means:

[0028] The calculation results are verified based on the instantaneous energy efficiency ratio. If the data range is outside the percentage of the ship's equipment's operating threshold, the calculation results are abnormal. If the data range is within the percentage of the ship's equipment's operating threshold, the calculation results are not abnormal.

[0029] Step S5, based on the instantaneous energy efficiency ratio, uses the average energy efficiency calculation model to calculate and obtain the average energy efficiency ratio, which refers to:

[0030] First, monitor the servo motor's rudder angle. When the rudder angle changes, start timing and continuously acquire the rudder angle current data I based on the calculated frequency. in If the current data I within the calculation period in If the value is greater than 0, then calculate the input power P respectively. in With output useful power P out The average input power and average output useful power are obtained by cyclically accumulating them until I within the calculation cycle. in If the value is ≤0, the timing stops, and then the average energy efficiency ratio is calculated according to the average energy efficiency calculation model.

[0031] The average energy efficiency calculation model is as follows:

[0032] η evg =(∑P out ) / (∑P in );

[0033] Where: ∑P in For the average input power, ∑P out This represents the average output useful power.

[0034] Step S6, classifying energy efficiency levels based on the average energy efficiency ratio and displaying the energy efficiency level of the servo motor equipment based on the energy efficiency level, refers to:

[0035] The average energy efficiency ratio of different values ​​is divided into different energy efficiency levels. The energy efficiency level of the servo motor is displayed according to the energy efficiency level, and an abnormal warning is issued for the energy efficiency level that reaches the warning threshold.

[0036] The energy efficiency levels include: Level 1, Level 2, and Level 3.

[0037] The first-level energy efficiency is defined as an average energy efficiency ratio > 80%; the second-level energy efficiency is defined as 60% < average energy efficiency ratio < 80%; and the third-level energy efficiency is defined as an average energy efficiency ratio < 60%.

[0038] A system for evaluating the energy efficiency of ship steering gear equipment based on data from the steering gear equipment, the system comprising:

[0039] The ship data acquisition module is used to monitor and collect steering gear operation data in real time during ship operation;

[0040] The ship operation data verification module is used to verify and preprocess the validity of the collected steering gear operation data;

[0041] The instantaneous energy efficiency calculation module is used to perform data calculations based on the steering gear energy efficiency calculation model to obtain the instantaneous energy efficiency ratio of the ship.

[0042] The ship data calculation and verification module is used to verify the validity of the calculation results.

[0043] The ship average energy efficiency calculation module is used to perform data calculations based on the average energy efficiency calculation model to obtain the ship's average energy efficiency ratio.

[0044] The ship energy efficiency display module is used to classify the energy efficiency level of ships and display the energy efficiency level of steering gear equipment based on the energy efficiency level;

[0045] The ship interaction module is used to display the ship's energy efficiency data and abnormal data, and provides a visual human-computer interaction.

[0046] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0047] 1. The method for evaluating the energy efficiency of ship steering gear based on data from this invention first monitors and collects steering gear operation data during ship operation, then verifies the data, followed by preprocessing to obtain unified operation data. Subsequently, based on this unified operation data, a steering gear energy efficiency calculation model is used to calculate the instantaneous energy efficiency ratio (EER). The calculation results are then verified, and the change cycle of the steering gear rudder angle is monitored to calculate the average EER, obtaining the average EER value. Then, based on the average EER value, anomaly levels are classified to evaluate the energy efficiency level of the steering gear. In application, this design obtains the ship's energy efficiency ratio data in a timely manner through real-time data collection and calculation, allowing shipboard personnel to immediately grasp the energy consumption status of the ship's steering gear. This enables assessment and adjustment of abnormal energy consumption in the steering gear, achieving the goal of energy saving and consumption reduction. Furthermore, the data verification during the EER calculation process ensures the accuracy of the calculation results. Therefore, this invention can not only promptly judge equipment energy consumption but also accurately reflect the equipment's energy efficiency level.

[0048] 2. In the method for evaluating the energy efficiency of ship steering gear equipment based on data from the present invention, not only are the operational data verified, but the calculation results are also verified. In application, this design ensures the accuracy of the collected data by verifying the operational data, and further verifies the calculation results to ensure their rationality, thus guaranteeing accurate feedback on the equipment's energy consumption level. Therefore, the present invention can accurately reflect the equipment's energy efficiency level.

[0049] 3. The system for evaluating the energy efficiency of ship steering gear equipment based on data from this invention includes a ship data acquisition module, a ship operation data verification module, a ship instantaneous energy efficiency calculation module, a ship data calculation and verification module, a ship average energy efficiency calculation module, a ship energy efficiency display module, and a ship interaction module. In application, through the cooperation of these modules, the system performs real-time calculations on the ship's operating status, energy efficiency ratio, and other information, and provides real-time feedback of the results. This allows for timely understanding of the energy efficiency status of the ship's steering gear. It also displays abnormal data and energy efficiency ratio data, exhibiting good usability. Therefore, this invention not only allows for timely assessment of equipment energy consumption but also offers excellent ease of use. Attached Figure Description

[0050] Figure 1 This is a schematic diagram of the evaluation process of the present invention.

[0051] Figure 2 This is a schematic diagram of the force model of the servo motor in Embodiment 1 of the present invention.

[0052] Figure 3 This is a schematic diagram of the system structure of the present invention.

[0053] The diagram shows: 1. Ship data acquisition module; 2. Ship operation data verification module; 3. Ship instantaneous energy efficiency calculation module; 4. Ship data calculation and verification module; 5. Ship average energy efficiency calculation module; 6. Ship energy efficiency display module; 7. Ship interaction module. Detailed Implementation

[0054] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0055] See Figure 1 — Figure 3 A method for evaluating the energy efficiency of ship steering gear equipment based on data from ship steering gear equipment, the method comprising:

[0056] S1. Real-time monitoring and collection of steering gear operation data during ship operation;

[0057] S2. Perform data verification on the running data; if there are any abnormalities in the running data, report the abnormal data; if there are no abnormalities in the running data, preprocess it to obtain unified running data.

[0058] S3. Based on unified operating data, the instantaneous energy efficiency ratio is obtained by using the servo motor energy efficiency calculation model.

[0059] S4. Verify the data calculation results based on the instantaneous energy efficiency ratio; if there are any abnormalities in the calculation results, report the abnormal data; if there are no abnormalities in the calculation results, proceed to step S5.

[0060] S5. Based on the instantaneous energy efficiency ratio, the average energy efficiency calculation model is used to calculate and obtain the average energy efficiency ratio.

[0061] S6. Classify energy efficiency levels based on average energy efficiency ratio, and display the energy efficiency level of servo motor equipment based on the energy efficiency level.

[0062] In step S1, the operating data of the steering gear during ship operation includes: flow rate, cylinder pressure, steering angle, steering time, and power factor.

[0063] In step S2, the data verification of the running data refers to:

[0064] Through data warehousing, a multi-threaded mechanism is used during the receiving process to verify the validity range of the operating data according to the working threshold of the ship's equipment. If the operating data is within the working threshold of the ship's equipment, it means that the relevant ship's equipment is operating normally. If the operating data is outside the working threshold of the ship's equipment or is empty, it means that the relevant ship's equipment is operating abnormally or the data acquisition equipment is malfunctioning, and the abnormal operating data is reported back.

[0065] In step S2, the preprocessing refers to rounding, deduplication, or normalization of the running data.

[0066] In step S3, the servo motor energy efficiency calculation model is as follows:

[0067]

[0068] Where: P in For input power, P out To output useful power;

[0069]

[0070] Where: n in U represents the number of working motors. in I is the input voltage to the motor. in For current, Power factor;

[0071]

[0072] Δθ=|θ1-θ2|;

[0073]

[0074] Where: p1, p2, p3, and p4 are the real-time oil pressure values ​​of multiple cylinders, S ram R is the cross-sectional area of ​​the plunger. tiller Δθ is the radius of the rudder arm, Δθ is the change in rudder angle from θ1 to θ2 in radians during the monitoring period, Δt is the time of change in rudder angle from θ1 to θ2 during the monitoring period, and θ1 and θ2 are the rudder angle radians at the start of any steering maneuver.

[0075] In step S4, verifying the data calculation results based on the instantaneous energy efficiency ratio means:

[0076] The calculation results are verified based on the instantaneous energy efficiency ratio. If the data range is outside the percentage of the ship's equipment's operating threshold, the calculation results are abnormal. If the data range is within the percentage of the ship's equipment's operating threshold, the calculation results are not abnormal.

[0077] Step S5, based on the instantaneous energy efficiency ratio, uses the average energy efficiency calculation model to calculate and obtain the average energy efficiency ratio, which refers to:

[0078] First, monitor the servo motor's rudder angle. When the rudder angle changes, start timing and continuously acquire the rudder angle current data I based on the calculated frequency. in If the current data I within the calculation period in If the value is greater than 0, then calculate the input power P respectively. in With output useful power Pout The average input power and average output useful power are obtained by cyclically accumulating them until I within the calculation cycle. in If the value is ≤0, the timing stops, and then the average energy efficiency ratio is calculated according to the average energy efficiency calculation model.

[0079] The average energy efficiency calculation model is as follows:

[0080] η evg =(∑P out ) / (∑P in );

[0081] Where: ∑P in For the average input power, ∑P out This represents the average output useful power.

[0082] Step S6, classifying energy efficiency levels based on the average energy efficiency ratio and displaying the energy efficiency level of the servo motor equipment based on the energy efficiency level, refers to:

[0083] The average energy efficiency ratio of different values ​​is divided into different energy efficiency levels. The energy efficiency level of the servo motor is displayed according to the energy efficiency level, and an abnormal warning is issued for the energy efficiency level that reaches the warning threshold.

[0084] The energy efficiency levels include: Level 1, Level 2, and Level 3.

[0085] The first-level energy efficiency is defined as an average energy efficiency ratio > 80%; the second-level energy efficiency is defined as 60% < average energy efficiency ratio < 80%; and the third-level energy efficiency is defined as an average energy efficiency ratio < 60%.

[0086] A system for evaluating the energy efficiency of ship steering gear equipment based on data from the steering gear equipment, the system comprising:

[0087] Ship data acquisition module 1 is used to monitor and collect steering gear operation data in real time during ship operation;

[0088] Ship operation data verification module 2 is used to verify and preprocess the validity of the collected steering gear operation data;

[0089] Ship instantaneous energy efficiency calculation module 3 is used to perform data calculation based on the steering gear energy efficiency calculation model to obtain the ship's instantaneous energy efficiency ratio.

[0090] Ship data calculation verification module 4 is used to verify the validity of the calculation results;

[0091] The ship average energy efficiency calculation module 5 is used to perform data calculations based on the average energy efficiency calculation model to obtain the ship's average energy efficiency ratio.

[0092] Ship energy efficiency display module 6 is used to classify the energy efficiency level of ships and display the energy efficiency level of steering gear equipment based on the energy efficiency level;

[0093] Ship interaction module 7 is used to display the ship's energy efficiency data and abnormal data, and provides visual human-computer interaction.

[0094] Example 1:

[0095] See Figure 1 A method for evaluating the energy efficiency of ship steering gear equipment based on data from ship steering gear equipment, the method comprising:

[0096] S1. Real-time monitoring and collection of steering gear operation data during ship operation; the data includes flow rate, cylinder pressure, steering angle, steering time, and power factor;

[0097] S2. Perform data verification on the running data; if there are any abnormalities in the running data, report the abnormal data; if there are no abnormalities in the running data, preprocess it to obtain unified running data.

[0098] Furthermore, through data warehousing, a multi-threaded mechanism is used during the receiving process to verify the validity range of the operating data according to the working threshold of the ship equipment. If the operating data is within the working threshold of the ship equipment, it means that the relevant ship equipment is operating normally, and it is rounded, deduplicated, or normalized. If the operating data is outside the working threshold of the ship equipment or is empty, it means that there is an abnormality in the operation of the relevant ship equipment or that the data acquisition equipment is malfunctioning, and the abnormality of the operating data is reported back.

[0099] Preferably, the effective range of the operating threshold in the ship equipment can be defined according to the recommendations of the ship equipment supplier; for example, when the motor voltage is 440V, the current must be greater than 0.

[0100] S3. Based on unified operating data, the instantaneous energy efficiency ratio is obtained by using the servo motor energy efficiency calculation model.

[0101] The energy efficiency calculation model for the servo motor is as follows:

[0102]

[0103] Where: P in For input power, P out To output useful power;

[0104] Preferably, to simplify calculations while meeting engineering application requirements, it is assumed that the input power supply voltage of the target ship's steering gear remains constant at AC 440V during operation. The power factor is referenced from the power factor of the ship's pump station motor and set to a fixed value of 0.8. Therefore, the calculation only requires measuring the operating current of the pump station motor to achieve the input power P of the steering gear pump unit motor.in Measurement;

[0105]

[0106] Where: n in U represents the number of working motors. in I is the input voltage to the motor. in For current, Power factor;

[0107]

[0108] Δθ=|θ1-θ2|;

[0109]

[0110] Where: p1, p2, p3, and p4 are the real-time oil pressure values ​​(actual measured values) of multiple cylinders, S ram R is the cross-sectional area of ​​the plunger. tiller Δθ is the radius of the rudder arm, Δθ is the change in rudder angle from θ1 to θ2 in radians during the monitoring period, Δt is the time of change in rudder angle from θ1 to θ2 during the monitoring period, and θ1 and θ2 are the rudder angle radians at the start of any steering maneuver.

[0111] Preferred, see Figure 2 , Figure 2 This is a schematic diagram of the force model for the rudder servo. High-pressure oil in the cylinder pushes the plunger F2, and the plunger pin on the plunger pushes the rudder handle and rudder stick to turn the rudder F1. The force arm is the distance R / cosθ from the center of the plunger pin to the center of the rudder stick. From the force model diagram, it can be seen that the larger the turning angle, the stronger the servo servo's output torque capability. Referring to the design requirements of a plunger-type servo servo, the useful output power P of the target ship's servo servo... out It can be obtained by converting torque and steering speed; where: torque is obtained by calculating steering force and lever arm, steering force is obtained by hydraulic cylinder pressure and hydraulic cylinder area, lever arm is obtained by steering handle turning radius and rudder angle, and steering speed can be obtained by unit time and real-time rudder angle.

[0112] S4. Verify the data calculation results based on the instantaneous energy efficiency ratio; if there are any abnormalities in the calculation results, report the abnormal data; if there are no abnormalities in the calculation results, proceed to step S5.

[0113] Furthermore, the threshold for instantaneous energy efficiency ratio under different conditions is between 0% and 100%. For example, at different speeds, under different navigation conditions, and with the servo motor engaged, if the calculated instantaneous energy efficiency ratio value is within the parameter threshold, it can be guaranteed that the formula and data are correct.

[0114] During the calculation process, if data that violates mathematical laws occurs (such as a divisor of 0), it will lead to obvious mathematical errors in the calculation results. For example, if the instantaneous energy efficiency ratio is 0% after the servo motor is started, it can be considered that there is a calculation anomaly in the calculation process. Feedback is required, and the specific data variable that is abnormal should be displayed so that further anomaly investigation can be carried out.

[0115] S5. Based on the instantaneous energy efficiency ratio, the average energy efficiency calculation model is used to calculate and obtain the average energy efficiency ratio.

[0116] Furthermore, firstly, the servo motor's rudder angle is monitored. When the rudder angle changes, timing begins, and the current data I of the rudder angle is continuously acquired based on the calculated frequency. in If the current data I within the calculation period in If the value is greater than 0, then calculate the input power P respectively. in With output useful power P out The average input power and average output useful power are obtained by cyclically accumulating them until I within the calculation cycle. in If the value is ≤0, stop timing and then obtain the average energy efficiency ratio according to the average energy efficiency ratio calculation formula;

[0117] The average energy efficiency calculation model is as follows:

[0118] η evg =(∑P out ) / (∑P in );

[0119] Where: ∑P in For the average input power, ∑P out This represents the average output useful power.

[0120] Preferably, the calculation frequency and data reception frequency can be set to different values ​​according to the operating status of the servo motor (for example, the end of the cycle is considered when the rudder angle remains unchanged for 2 consecutive seconds, or when the rudder angle data is abnormal; data is acquired every 0.5 seconds within the calculation cycle). Timing begins when the rudder angle starts to change. When the rudder angle remains unchanged for two seconds (i.e., changes occur four times consecutively), the cycle is considered to have ended, and the average energy efficiency is calculated. If ∑P in =0, then η evg =0.

[0121] S6. Classify energy efficiency levels based on average energy efficiency ratio, and display the energy efficiency level of servo motor equipment based on the energy efficiency level.

[0122] Furthermore, the average energy efficiency ratios of different values ​​are divided into different energy efficiency levels. The energy efficiency level of the servo motor is evaluated according to the energy efficiency level, and a warning is displayed for energy efficiency levels that reach the warning threshold. The energy efficiency levels include: Level 1, Level 2, and Level 3. Level 1 energy efficiency is defined as an average energy efficiency ratio > 80%. Level 2 energy efficiency is defined as 60% < average energy efficiency ratio < 80%. Level 3 energy efficiency is defined as an average energy efficiency ratio < 60%. Level 2 and Level 3 energy efficiency are considered to be abnormal. When the energy efficiency ratio is low, i.e., Level 2 or Level 3 energy efficiency, it indicates that the energy consumption is relatively high and the utilization rate is low. At this time, the servo motor needs to be adjusted accordingly.

[0123] Example 2:

[0124] The basic content is the same as in Example 1, except that:

[0125] The servo motor is equipped with several sensors, and this section will explain how to assess the energy efficiency of the servo motor in conjunction with these sensors.

[0126] First, a current sensor is installed at the motor power input, a pressure sensor is installed at the inlet and outlet of the steering gear pump, and a flow meter is installed on the pump outlet pipeline. The current sensor, pressure sensor, and flow meter are used to collect motor monitoring data and related steering gear monitoring data, respectively. Then, the information collected by the ship's pump equipment is received via TCP / IP in application / json format through the ship's local area network. The collected data is received at a set frequency, and the pump equipment monitoring data and maintenance parameters are synchronized to the operating condition server. The instantaneous energy efficiency ratio is then verified and calculated to obtain the instantaneous energy efficiency ratio value of the pump equipment under test. Finally, the equipment data, abnormal data, instantaneous energy efficiency ratio value, and other data are stored by connecting to a MySQL database.

[0127] By connecting to a MySQL database, when receiving servo motor data, the timestamp of servo angle change is recorded. According to the set servo angle change time, the calculation cycle is considered to end when the servo angle change time exceeds two seconds. The range of data that needs to participate in the average energy efficiency ratio calculation is queried. The sum of the input power and output power of the pump data within this range is calculated through the average energy efficiency calculation model to obtain the average energy efficiency ratio value of the pump equipment. Finally, the energy efficiency level is divided according to the average energy efficiency ratio value, and the energy efficiency level of the servo motor equipment is displayed based on the energy efficiency level.

[0128] Example 3:

[0129] The basic content is the same as in Example 1, except that:

[0130] See Figure 3 A system for evaluating the energy efficiency of ship steering gear equipment based on data from the steering gear equipment, the system comprising:

[0131] Ship data acquisition module 1 is used to monitor and collect steering gear operation data in real time during ship operation; the collected data includes flow rate, cylinder pressure, steering angle, steering time and power factor;

[0132] Ship operation data verification module 2 is used to verify and preprocess the validity of the collected steering gear operation data.

[0133] Furthermore, the ship operation data verification module 2 verifies and preprocesses the validity of the operation data in the following ways:

[0134] Through data warehousing, a multi-threaded mechanism is used during the receiving process to verify the validity range of the operating data according to the working threshold of the ship's equipment. If the operating data is within the working threshold of the ship's equipment, it means that the relevant ship's equipment is operating normally. If the operating data is outside the working threshold of the ship's equipment or is empty, it means that the relevant ship's equipment is operating abnormally or the data acquisition equipment is malfunctioning, and the abnormal operating data is reported back.

[0135] The preprocessing refers to: rounding, deduplication, or normalization of the running data;

[0136] Ship instantaneous energy efficiency calculation module 3 is used to perform data calculation based on the steering gear energy efficiency calculation model to obtain the ship's instantaneous energy efficiency ratio.

[0137] Furthermore, the servo motor energy efficiency calculation model is as follows:

[0138]

[0139] Where: P in For input power, P out To output useful power;

[0140]

[0141] Where: n in U represents the number of working motors. in I is the input voltage to the motor. in For current, Power factor;

[0142]

[0143] Δθ=|θ1-θ2|;

[0144]

[0145] Where: p1, p2, p3, and p4 are the actual measured values ​​of real-time oil pressure from multiple cylinders, and S ram R is the cross-sectional area of ​​the plunger.tiller Δθ is the radius of the rudder arm, Δθ is the change in rudder angle from θ1 to θ2 in radians during the monitoring period, Δt is the time of change in rudder angle from θ1 to θ2 during the monitoring period, and θ1 and θ2 are the rudder angle radians at the start of any steering maneuver.

[0146] Ship data calculation verification module 4 is used to verify the validity of the calculation results;

[0147] Furthermore, the ship data calculation verification module 4 verifies the validity of the calculation results in the following manner:

[0148] The data calculation results are verified based on the instantaneous energy efficiency ratio. If the data range is outside the percentage of the ship's equipment's operating threshold, it indicates that the calculation results are abnormal. If the data range is within the percentage of the ship's equipment's operating threshold, it indicates that the calculation results are not abnormal.

[0149] The ship average energy efficiency calculation module 5 is used to perform data calculations based on the average energy efficiency calculation model to obtain the ship's average energy efficiency ratio.

[0150] Furthermore, the ship average energy efficiency calculation module 5 calculates the data in the following way to obtain the ship's average energy efficiency ratio:

[0151] First, monitor the servo motor's rudder angle. When the rudder angle changes, start timing and continuously acquire the rudder angle current data I based on the calculated frequency. in If the current data I within the calculation period in If the value is greater than 0, then calculate the input power P respectively. in With output useful power P out The average input power and average output useful power are obtained by cyclically accumulating them until I within the calculation cycle. in If the value is ≤0, the timing stops, and then the average energy efficiency ratio is calculated according to the average energy efficiency calculation model.

[0152] The average energy efficiency calculation model is as follows:

[0153] η evg =(∑P out ) / (∑P in );

[0154] Where: ∑P in For the average input power, ∑P out This represents the average output useful power.

[0155] Ship energy efficiency display module 6 is used to classify the energy efficiency level of ships and display the energy efficiency level of steering gear equipment based on the energy efficiency level;

[0156] Furthermore, the ship energy efficiency display module 6 classifies the ship's energy efficiency level in the following way, and displays the energy efficiency level of the steering gear equipment based on the energy efficiency level:

[0157] The average energy efficiency ratio of different values ​​is divided into different energy efficiency levels. The energy efficiency level of the servo motor is displayed according to the energy efficiency level, and an early warning is displayed for the energy efficiency level that reaches the warning threshold.

[0158] The energy efficiency levels include: Level 1, Level 2, and Level 3.

[0159] The first-level energy efficiency is defined as an average energy efficiency ratio > 80%; the second-level energy efficiency is defined as 60% < average energy efficiency ratio < 80%; and the third-level energy efficiency is defined as an average energy efficiency ratio < 60%.

[0160] Ship interaction module 7 is used to display the ship's energy efficiency data and abnormal data, and provides visual human-computer interaction.

[0161] Furthermore, the ship interaction module 7 displays readable data, including instantaneous energy consumption ratio, average energy consumption ratio, and abnormal data, through computing devices, display devices, data exchange devices, etc., and provides visual human-computer interaction functions in the form of input, response, and alarm.

[0162] The above description is only a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present invention should be included within the scope of protection set forth in the claims.

Claims

1. A method for evaluating the energy efficiency of ship steering gear equipment based on data from ship steering gear equipment, characterized in that, The method includes: S1. Real-time monitoring and collection of steering gear operation data during ship operation; S2. Perform data verification on the running data; if there are any abnormalities in the running data, report the abnormal data; if there are no abnormalities in the running data, preprocess it to obtain unified running data. S3. Based on unified operating data, the instantaneous energy efficiency ratio is obtained by using the servo motor energy efficiency calculation model. S4. Verify the data calculation results based on the instantaneous energy efficiency ratio; if there are any abnormalities in the calculation results, report the abnormal data; if there are no abnormalities in the calculation results, proceed to step S5. S5. Based on the instantaneous energy efficiency ratio, the average energy efficiency calculation model is used to calculate and obtain the average energy efficiency ratio. In step S3, the servo motor energy efficiency calculation model is as follows: ； in: For input power, To output useful power; ； in: The number of working motors, This is the input voltage for the motor. For current, Power factor; ； ； ； in: , , , This refers to the real-time oil pressure values ​​of multiple cylinders. Let be the cross-sectional area of ​​the plunger. The radius of the rudder arm. During the monitoring period, from arrive The change in rudder angle in radians, During the monitoring period, from arrive The time for changing the rudder angle, , The initial rudder angle in radians for any single steering maneuver; S6. Classify energy efficiency levels based on average energy efficiency ratio, and display the energy efficiency level of servo motor equipment based on the energy efficiency level.

2. The method for evaluating the energy efficiency of a ship's steering gear based on data from the steering gear equipment according to claim 1, characterized in that: In step S1, the operating data of the steering gear during ship operation includes: flow rate, cylinder pressure, steering angle, steering time, and power factor.

3. The method for evaluating the energy efficiency of a ship's steering gear based on data from the steering gear equipment according to claim 1, characterized in that: In step S2, the data verification of the running data refers to: Through data warehousing, a multi-threaded mechanism is used during the receiving process to verify the validity range of the operating data according to the working threshold of the ship's equipment; if the operating data is within the working threshold of the ship's equipment, it means that the relevant ship's equipment is operating normally. If the operational data is outside the operating threshold of the ship's equipment or is empty, it indicates that there is an abnormality in the operation of the relevant ship's equipment or that the data acquisition equipment is malfunctioning, and the abnormal operational data will be reported back.

4. The method for evaluating the energy efficiency of a ship's steering gear based on data from the steering gear equipment according to claim 1, characterized in that: In step S2, the preprocessing refers to rounding, deduplication, or normalization of the running data.

5. The method for evaluating the energy efficiency of a ship's steering gear based on data from the steering gear equipment according to claim 1, characterized in that: In step S4, verifying the data calculation results based on the instantaneous energy efficiency ratio means: The calculation results are verified based on the instantaneous energy efficiency ratio. If the data range is outside the percentage of the ship's equipment's operating threshold, the calculation results are abnormal. If the data range is within the percentage of the ship's equipment's operating threshold, the calculation results are not abnormal.

6. The method for evaluating the energy efficiency of a ship's steering gear based on data from the steering gear equipment according to claim 1, characterized in that: Step S5, based on the instantaneous energy efficiency ratio, uses the average energy efficiency calculation model to calculate and obtain the average energy efficiency ratio, which refers to: First, monitor the servo motor's rudder angle. When the rudder angle changes, start timing and continuously acquire the rudder angle's current data based on the calculated frequency. ; If calculating current data within a period Then calculate the input power respectively. With output useful power The average input power and average output useful power are obtained by cyclically accumulating them until the calculation period ends. If the timer stops, the average energy efficiency ratio is calculated based on the average energy efficiency calculation model. The average energy efficiency calculation model is as follows: ； in: For average input power, This represents the average output useful power.

7. The method for evaluating the energy efficiency of a ship's steering gear based on data from the steering gear equipment according to claim 1, characterized in that: Step S6, classifying energy efficiency levels based on the average energy efficiency ratio and displaying the energy efficiency level of the servo motor equipment based on the energy efficiency level, refers to: The average energy efficiency ratio with different values ​​is divided into different energy efficiency levels. The energy efficiency level of the servo motor is displayed according to the energy efficiency level, and an abnormal warning is issued for the energy efficiency level that reaches the warning threshold.

8. The method for evaluating the energy efficiency of a ship's steering gear based on data from the steering gear equipment according to claim 7, characterized in that: The energy efficiency levels include: Level 1, Level 2, and Level 3. The first-level energy efficiency is defined as an average energy efficiency ratio > 80%; the second-level energy efficiency is defined as 60% < average energy efficiency ratio < 80%; and the third-level energy efficiency is defined as an average energy efficiency ratio < 60%.

9. A system for evaluating the energy efficiency of ship steering gear equipment based on data from ship steering gear equipment, characterized in that, The system is applied to the method of claim 1, the system comprising: Ship data acquisition module (1) is used to monitor and collect steering gear operation data of the ship in real time; The ship operation data verification module (2) is used to verify and preprocess the validity of the collected steering gear operation data; The instantaneous energy efficiency calculation module (3) is used to perform data calculation based on the steering gear energy efficiency calculation model to obtain the instantaneous energy efficiency ratio of the ship; The ship data calculation verification module (4) is used to verify the validity of the calculation results; The ship average energy efficiency calculation module (5) is used to perform data calculation based on the average energy efficiency calculation model to obtain the ship's average energy efficiency ratio. The ship energy efficiency display module (6) is used to classify the energy efficiency level of ships and display the energy efficiency level of steering gear equipment based on the energy efficiency level; The ship interaction module (7) is used to display the ship's energy efficiency data and abnormal data, and provide visual human-computer interaction.

Images