Device for measuring thrust and torque for ship model test using data post-processing

Abstract

The present invention relates to a thrust and torque measuring device for a model test of a ship. The purpose of the present invention is to provide a self-propelled dynamometer in the prior art in which a thrush and a torque generated on a single rotating shaft connected to a propeller are measured at the same time, resulting in an interference effect occurring between the thrush and the torque, and to provide a self-propelled dynamometer in which the thrush and the torque are measured at the same time, and to provide a self-propelled dynamometer in which the thrush and the torque are measured at the same time, and to provide a self-propelled dynamometer in which the thrush and the torque are measured at the same time. A thrust bearing for rotating while transmitting thrust applied to a shaft to a force cell and a coupling for determining whether or not the alignment state between shafts is abnormal are disposed between the force cell for thrust measurement and the force cell for torque measurement. The interference amount between thrust and torque data is corrected through a data processing board, and whether the shaft alignment state is abnormal or not is judged, so that the interference amount generated when thrust and torque are measured is corrected in a data post-processing mode, and the influence caused by the interference effect is reduced to the maximum extent. Therefore, the thrust and torque measuring device for ship model testing using data post-processing can improve the accuracy and precision of simultaneous measurement of thrust and torque.

Description

Technical Field

[0001] The present invention relates to a thrust and torque measuring device for ship model testing, and more particularly to a thrust and torque measuring device for ship model testing that aims to solve the problem that the device includes a single-axis force measuring load cell for thrust measurement and a rotary torque load cell for torque measurement in order to simultaneously measure two physical quantities, thrust and torque, but since the thrust and torque generated on a rotating shaft connected to a propeller need to be measured simultaneously, each measurement cannot be completed independently, thereby being unable to avoid the interference effect between the thrust and torque. The device uses data post-processing to correct the interference amount generated during the thrust and torque measurement, thereby minimizing the influence caused by the interference effect and improving the precision of the output value.

[0002] In addition, the present invention relates to a device that aims to solve the problem that in order to minimize the interference effect between thrust and torque, it is necessary to optimize the installation accuracy and alignment status of each load cell used to predict thrust and torque, but the optimization of the installation accuracy and alignment status as described above is not easy, and even when the installation accuracy or alignment status is optimized, it is difficult to reduce the interference amount to a level where the interference amount can be ignored. A thrust bearing (thrust bearing) for rotating while transmitting the thrust applied to the shaft to the load cell and a coupling for judging whether the alignment state between the shafts is abnormal are respectively arranged between the load cell for thrust measurement and the load cell for torque measurement. The interference amount between the thrust and torque data is corrected and the shaft alignment state is judged to be abnormal through a data processing board, thereby correcting the interference amount occurring during the thrust and torque measurement in a data post-processing manner and minimizing the influence caused by the interference effect, thereby improving the accuracy and precision of the simultaneous measurement of thrust and torque. A thrust and torque measuring device for ship model testing using data post-processing. Background Art

[0003] At present, in order to understand the fluid dynamics performance of ships, model tests such as resistance, propulsion, maneuverability and seaworthiness are usually performed in a towing tank using a model ship with a geometric shape similar to the actual ship.

[0004] In the model test described above, the ship will be towed and tested at a speed such that the surface ship follows the Froude similarity criterion and the submersible body follows the Reynolds similarity criterion. At this time, the size of the physical quantity to be measured, the measurement environment, and the frequency will also change according to each model test. Therefore, a sensor suitable for the characteristics and measurement range of the measurement data will be selected to perform the test, and the various physical quantities measured will be interpreted through methods such as the International Towing Tank Conference Test Interpretation Procedure, thereby evaluating the fluid performance of actual-sized ships.

[0005] In addition, for the model test of the ship as described above, as disclosed in Korean Registered Patent Gazette No. 10-2075266, "Propeller dynamometer verification method using PBW test method" and Korean Registered Patent Gazette No. 10-1401498, "Dynamometer capable of measuring thrust and torque of propeller and tail wing", a variety of devices and methods for measuring the thrust and torque of the ship have been proposed, but the contents of the above-mentioned prior art are subject to the following limitations.

[0006] Specifically, the self-propulsion test is one of the representative tests currently performed to evaluate the fluid performance of a ship. In the self-propulsion test, a self-propulsion dynamometer is usually used to measure the thrust and torque generated in the propeller through a rotary force sensor.

[0007] However, in order to measure both thrust and torque, existing self-propelled dynamometers include a single-axis force measurement load cell for thrust measurement and a rotary torque load cell for torque measurement. However, since it is necessary to measure both the thrust and torque generated on a rotating shaft connected to the propeller at the same time, each measurement cannot be completed independently, which will inevitably cause an interference effect between thrust and torque.

[0008] The amount of interference between thrust and torque varies depending on the installation accuracy of the force sensors measuring thrust and torque and their alignment with each other. However, it is difficult to reduce the amount of interference to a negligible level even when the installation or alignment is optimized.

[0009] Therefore, in order to solve the limitations of the self-propelled dynamometer in the prior art as described above, it is proposed to use a thrust and torque measuring device with a new structure that can minimize the impact caused by interference by correcting the interference amount occurring during thrust and torque measurement, thereby improving the accuracy and precision of the measured values. However, no device or method that meets all the requirements as described above has been proposed so far.

[0010] Prior art literature

[0011] Patent Literature

[0012] (Patent Document 0001) Korean Registered Patent Publication No. 10-2075266 (2020.02.07.)

[0013] (Patent Document 0002) Korean Registered Patent Publication No. 10-1401498 (2014.06.03.) Summary of the invention

[0014] The present invention aims to solve the problems existing in the prior art as described above. Therefore, the purpose of the present invention is to provide a self-propulsion dynamometer for ship model testing that includes a single-axis force measurement load cell for thrust measurement and a rotary torque load cell for torque measurement in order to simultaneously measure two physical quantities, thrust and torque. However, since it is necessary to measure the thrust and torque generated on a rotating shaft connected to a propeller at the same time, it is impossible to complete each measurement independently, thereby being unable to avoid the interference effect between thrust and torque. The present invention aims to correct the interference amount generated during thrust and torque measurement by data post-processing, thereby minimizing the influence caused by the interference effect and improving the accuracy of the output value.

[0015] In addition, another object of the present invention is to provide a device that aims to solve the problem that in order to minimize the interference effect between thrust and torque, it is necessary to optimize the installation accuracy and alignment status of each load cell used to predict thrust and torque, but the optimization of the installation accuracy and alignment status as described above is not easy, and even when the installation accuracy or alignment status is optimized, it is difficult to reduce the interference amount to a level where the interference amount can be ignored in the prior art self-propelled dynamometer. A thrust bearing (thrust bearing) for rotating while transmitting the thrust applied to the shaft to the load cell and a coupling for judging whether the alignment state between the shafts is abnormal are respectively arranged between the thrust measurement load cell and the torque measurement load cell. The interference amount between the thrust and torque data is corrected and the shaft alignment state is judged to be abnormal through a data processing board, so that the interference amount occurring during the thrust and torque measurement is corrected by data post-processing and the influence caused by the interference effect is minimized, thereby improving the accuracy and precision of the simultaneous measurement of thrust and torque. A thrust and torque measuring device for ship model testing using data post-processing.

[0016] In order to achieve the above-mentioned purpose, the present invention provides a thrust and torque measuring device for ship model testing using data post-processing, characterized in that it includes: a thrust bearing installed on the drive shaft of a propeller; a thrust measuring force sensor installed on one side of the thrust bearing in order to measure the thrust transmitted through the thrust bearing; a torque measuring force sensor installed on the drive shaft in order to measure the torque transmitted through the thrust bearing; a coupling installed between the thrust bearing and the torque measuring force sensor; an encoder installed at the other end of the torque measuring force sensor in order to measure the rotation speed of the drive shaft; a slip ring installed between the torque measuring force sensor and a drive motor; and a data processing board for performing processing to correct the interference amount between the thrust and torque data based on the measurement values ​​measured by each force sensor and to determine whether the axis alignment state is abnormal.

[0017] Among them, the present invention is characterized in that: the thrust bearing is constructed to rotate while transmitting the thrust applied to the drive shaft by means of the propeller, so that it is constructed to transmit the torque generated by the propeller to the torque measuring force sensor while transmitting the thrust generated by the propeller to the thrust measuring force sensor.

[0018] Furthermore, the present invention is characterized in that the thrust measuring load cell is composed of a uniaxial force measuring load cell for measuring the thrust generated in the propeller, and is configured to measure the thrust transmitted through the thrust bearing by being closely mounted to the thrust bearing.

[0019] Furthermore, the present invention is characterized in that the torque measuring load cell is constituted by a rotational load cell for measuring the torque generated in the propeller, and is configured to measure the torque transmitted through the thrust bearing and the coupling.

[0020] Furthermore, the present invention is characterized in that the coupling is constructed so that deformation caused by the thrust of the propeller and deformation caused by the torque of the propeller both undergo linear deformation, and is thus constructed with one end connected to the thrust bearing and the other end connected to the torque measuring load cell.

[0021] Furthermore, the present invention is characterized in that the slip ring is constituted by a rotary connector for power supply and data communication, and is configured to be arranged between the torque measuring load cell and the drive motor.

[0022] Moreover, the present invention is characterized in that: the data processing board includes a wireless data communication module, which is configured to receive each measurement value from the force sensor for measuring thrust and the force sensor for measuring torque through wireless data communication and correct the interference between the thrust and torque data, and execute the processing of transmitting each measurement value and the corrected measurement value to an external instrument through wireless data communication according to preset settings.

[0023] The present invention is characterized in that the data processing board is configured to perform processing for correcting the amount of interference between thrust and torque data using the following mathematical formula.

[0024]

[0025] (in,

[0026] T H-C : Corrected thrust data [N],

[0027] T H-C : Corrected torque data [Nm],

[0028] A Th :Calibration factor of thrust [N / (mV / V)],

[0029] A Tq :Torque correction factor (Calibration factor) [Nm / (mV / V)],

[0030] I Th : Thrust interference factor due to torque [N / Nm],

[0031] I Tq : Torque interference factor due to thrust [Nm / N],

[0032] T H-R : The raw data of the measured thrust (Raw data) [mV / V],

[0033] T Q-R : Raw data of the measured torque (Raw data) [mV / V])

[0034] Alternatively, the present invention is characterized in that the data processing board is configured to execute processing for correcting the amount of interference between thrust and torque data using the following mathematical formula.

[0035]

[0036] (in,

[0037] T H-C : Corrected thrust data [N],

[0038] T H-C : Corrected torque data [Nm],

[0039] A Th :Calibration factor of thrust [N / (mV / V)],

[0040] A Tq :Torque correction factor (Calibration factor) [Nm / (mV / V)],

[0041] I Th : Thrust interference factor due to torque [N / Nm],

[0042] I Tq : Torque interference factor due to thrust [Nm / N],

[0043] T H-R : The raw data of the measured thrust (Raw data) [mV / V],

[0044] T Q-R : Raw data of the measured torque [mV / V],

[0045] n: number of shaft revolutions)

[0046] Furthermore, the present invention is characterized in that the coupling comprises an alignment force sensor for determining whether the alignment state between the shafts is abnormal.

[0047] In addition, the present invention is characterized in that: in the data processing board, according to the user's selection or preset settings, a measurement mode function is executed to correct the interference between the thrust and torque measurement values ​​and transmit the corrected data to an external instrument through wireless communication according to the preset settings, and an axis alignment mode function is executed to generate a warning or alarm according to the preset settings when the deformation degree of the coupling exceeds the preset reference value based on the measurement value of the alignment force sensor and transmit a re-adjustment request notification to preset contact information including an administrator.

[0048] Furthermore, the present invention is characterized in that the measuring device further includes a database unit which pre-stores data including various correction coefficients derived in advance for correcting the measured values, and is used to store various data including various measured values ​​and corrected final result values.

[0049] Furthermore, the present invention provides a thrust and torque measuring method, characterized in that it is a thrust and torque measuring method using the thrust and torque measuring device for ship model testing using data post-processing described in the above content, including: an alignment step, using the axis alignment mode of the thrust and torque measuring device to perform a process of checking and adjusting the alignment state; and a measurement step, using the measurement mode of the thrust and torque measuring device that has completed the alignment through the alignment step, to perform a process of measuring the thrust and torque respectively.

[0050] Furthermore, the present invention provides a ship model testing system, characterized by including a thrust and torque measuring device for ship model testing utilizing data post-processing as described above.

[0051] As described above, the present invention can provide a thrust bearing (thrust bearing) that is respectively arranged between a force sensor for measuring thrust and a force sensor for measuring torque and is used to rotate while transmitting the thrust applied to the shaft to the force sensor, and a coupling that is used to judge whether the alignment state between the shafts is abnormal. The thrust and torque measuring device for ship model testing that uses data post-processing to correct the interference amount between the thrust and torque data and judge whether the shaft alignment state is abnormal can be provided. The interference amount occurring during the thrust and torque measurement can be corrected by data post-processing and the influence caused by the interference effect can be minimized, thereby improving the accuracy and precision of the simultaneous measurement of thrust and torque.

[0052] In addition, the present invention can provide a thrust and torque measuring device for ship model testing that uses data post-processing to correct the interference amount occurring during thrust and torque measurement and minimize the influence caused by the interference phenomenon as described above, thereby improving the accuracy and precision of the measured values, thereby solving the problem existing in the prior art self-propelled dynamometer that includes a single-axis force measurement force sensor for thrust measurement and a rotary torque force sensor for torque measurement in order to simultaneously measure two physical quantities, thrust and torque, but because it is necessary to measure the thrust and torque occurring on a rotating shaft connected to the propeller at the same time, it is impossible to complete each measurement independently, thereby being unable to avoid the interference effect between thrust and torque.

[0053] Moreover, the present invention can provide a thrust and torque measuring device for ship model testing that uses data post-processing to correct the interference amount occurring during thrust and torque measurement and minimize the influence caused by the interference phenomenon as described above, thereby improving the accuracy and precision of the measured values, thereby solving the problem of optimizing the installation accuracy and alignment status of each force sensor used to predict thrust and torque in order to minimize the interference effect between thrust and torque, but the optimization of the installation accuracy and alignment status as described above is not easy, and even when the installation accuracy or alignment status is optimized, it is difficult to reduce the interference amount to a level where the interference amount can be ignored. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 The diagram schematically illustrates the overall structure of a thrust and torque measuring device for ship model testing using data post-processing according to an embodiment of the present invention.

[0055] Figure 2Yes Figure 1 1 is a conceptual diagram schematically illustrating the overall structure of a data post-processing function executed in a data processing board of a thrust and torque measuring device for ship model testing using data post-processing according to an embodiment of the present invention.

[0056] Description of Reference Numerals

[0057] 10: Thrust and torque measuring device for ship model testing using data post-processing

[0058] 11: Thrust bearing

[0059] 12: Force sensor for thrust measurement

[0060] 13: Load cell for torque measurement

[0061] 14: Coupling

[0062] 15: Encoder

[0063] 16: Slip ring

[0064] 17: Data processing board DETAILED DESCRIPTION

[0065] Next, a specific embodiment of the thrust and torque measuring device for ship model testing using data post-processing according to the present invention will be described with reference to the accompanying drawings.

[0066] It should be noted that the following description is only an embodiment for implementing the present invention, and the present invention is not limited by the following description.

[0067] In addition, it should be noted that in the process of describing the embodiments of the present invention, for parts that are determined to be the same or similar to the contents of the prior art, or that can be easily understood and implemented at the level of relevant practitioners, their detailed descriptions will be omitted in order to simplify the description.

[0068] Next, the specific contents of the thrust and torque measuring device for ship model testing using data post-processing according to the present invention will be described with reference to the accompanying drawings.

[0069] Specifically, see first Figure 1 , Figure 1 The diagram schematically illustrates the overall structure of a thrust and torque measuring device 10 for ship model testing using data post-processing according to an embodiment of the present invention.

[0070] like Figure 1As shown in the figure, a thrust and torque measuring device 10 for ship model testing using data post-processing according to an embodiment of the present invention can generally include: a thrust bearing 11, which is connected to a drive shaft of a propeller (not shown) and rotates while transmitting a force applied to the drive shaft; a thrust measuring force sensor 12, which is connected to one side of the thrust bearing 11 in order to measure the thrust of the propeller transmitted through the thrust bearing 11; a torque measuring force sensor 13, which is connected to the drive shaft in order to measure the torque of the propeller transmitted through the thrust bearing 11; a coupling 14, one end of which is connected to the thrust bearing 11 and the other end of which is connected to the torque measuring force sensor 13, so as to connect the thrust bearing 11 and the torque measuring force sensor The torque measuring device 13 is connected to the torque measuring device 13, and includes a force sensor for judging whether the alignment state between the shafts is abnormal; an encoder 15 is arranged at the other end of the torque measuring force sensor 13 in order to measure the rotation speed of the drive shaft; a slip ring 16 is composed of a rotary connector for power supply and data communication, and is arranged between the torque measuring force sensor 13 and a drive motor (not shown); and a data processing board 17 is used to perform processing for correcting the interference amount between the thrust and torque data according to the measurement values ​​measured by each force sensor and judging whether the shaft alignment state is abnormal.

[0071] Specifically, first, the thrust bearing 11 is as follows Figure 1 As shown, the drive shaft installed for transmitting the power of the motor to the propeller can rotate while transmitting the thrust applied to the drive shaft by means of the propeller, so that the thrust generated by the propeller is transmitted to the force sensor 12 for thrust measurement, and the torque generated by the propeller is transmitted to the force sensor 13 for torque measurement, so that the thrust and torque can be measured at the same time.

[0072] The thrust measuring load cell 12 is composed of a uniaxial force measuring load cell for measuring the thrust generated in the propeller. Figure 1 As shown, it is preferable that the thrust transmitted from the propeller to the thrust bearing 11 is directly received by being closely mounted to the thrust bearing 11 .

[0073] The torque measuring load cell 13 is composed of a rotation type load cell for measuring the torque generated in the propeller, and measures the torque transmitted through the coupling 14 connected to the thrust bearing 11 .

[0074] That is, the coupling 14 is a component that connects the shaft connected to the force sensor 12 for thrust measurement and the shaft connected to the force sensor 13 for torque measurement in order to measure the thrust and torque at the same time. To this end, the coupling 14 causes the deformation caused by the thrust of the propeller and the deformation caused by the torque of the propeller to undergo linear deformation, thereby accurately transmitting the force.

[0075] Specifically, if Figure 1 As shown, the thrust and torque generated in the propeller are transmitted in the order of thrust measuring force sensor 12 → coupling 14 → torque measuring force sensor 13. At this time, when the force generated in the thrust measuring force sensor 12 becomes larger, it will also affect the coupling 14, thereby increasing the deformation of the coupling 14. Ultimately, the precision and reliability of the torque output value will be reduced due to the misalignment of the shaft alignment.

[0076] Therefore, in order to prevent the problems mentioned above, the force sensor 12 for thrust measurement needs to be designed to be as wide as possible so as to minimize the torque effect. Although the deformation of the coupling 14 caused by the thrust applied to the drive shaft cannot be completely eliminated, only by selecting or manufacturing a coupling in which the deformation degree of the coupling caused by the applied thrust has linear characteristics can the precision and reliability of the torque output value be improved.

[0077] Furthermore, although not shown in the figure, the coupling 14 may include a separate alignment force sensor for determining whether the alignment state between the shafts is abnormal, thereby monitoring the alignment state of the drive shaft based on the measured value.

[0078] Among them, it should be noted that, as for the more specific structures related to the thrust bearing 11 that rotates while transmitting thrust as described above, the thrust measuring force sensor 12 for measuring the thrust transmitted through the thrust bearing 11, the torque measuring force sensor 13 for measuring the torque transmitted through the thrust bearing 11 and the coupling 14, the coupling 14 for connecting shafts, the encoder 15 for measuring the rotation speed of the drive shaft, and the slip ring 16 composed of a rotary connector for power supply and data communication, since these are matters that relevant practitioners can appropriately implement by referring to the structures of existing bearings or force sensors and self-propelled dynamometers, the present invention, in order to simplify the explanation, will omit the detailed description related to the contents that relevant practitioners can clearly confirm based on the contents of the prior art or that relevant practitioners can easily understand and implement by referring to the literature in the prior art.

[0079] Next, as described later, the data processing board 17 may receive measurement values ​​from each load cell via the wireless data communication module and correct the interference between the thrust and torque data to determine whether the shaft alignment state is abnormal.

[0080] That is, Figure 2 As shown, Figure 2 Yes Figure 1 1 is a conceptual diagram schematically illustrating the overall structure of a data post-processing function executed in a data processing board 17 of a thrust and torque measuring device 10 for ship model testing utilizing data post-processing according to an embodiment of the present invention.

[0081] like Figure 2 As shown, the thrust and torque measuring device 10 for ship model testing using data post-processing according to an embodiment of the present invention can perform a data post-processing function for minimizing the interference effect between thrust and torque through the data processing board 17 .

[0082] Specifically, if Figure 2 As shown, by applying the previously executed correction results to the thrust, torque and rotation speed data in the form of raw data (Raw data) transmitted from each load cell, the corrected final result value can be obtained through the processing process described later.

[0083] Among them, in the existing method, data is sent and received between the thrust and torque measuring device and the PC through a wired cable. However, in the case described above, the sagging of the cable due to the shape or weight of the cable may become an interference factor applied to the fluid dynamic characteristics of the actual model ship.

[0084] Therefore, in the present invention, in order to solve the above-mentioned problems, a wireless data communication module is included in the data processing board 17, and the data obtained from the thrust and torque measuring device is directly transmitted to a measuring PC or server, etc. through wireless data communication, thereby preventing interference caused by cables in existing wired connections and improving the accuracy of output data.

[0085] In addition, the processing procedure for correcting the measured thrust and torque can be performed according to the following [Mathematical Formula 1].

[0086]

Mathematical formula 1

[0087]

[0088] T H-C : Corrected thrust data [N]

[0089] T H-C: Corrected torque data [Nm]

[0090] A Th :Calibration factor of thrust [N / (mV / V)]

[0091] A Tq :Torque correction factor (Calibration factor) [Nm / (mV / V)]

[0092] I Th :Thrust interference factor due to torque [N / Nm]

[0093] I Tq :Torque interference factor due to thrust [Nm / N]

[0094] T H-R : Raw data of the measured thrust [mV / V]

[0095] T Q-R : Raw data of measured torque [mV / V]

[0096] That is, in the above [Mathematical Formula 1], T H-R and T Q-R It is the raw data of the thrust and torque transmitted from the propeller. Its unit (or the measurement unit of the sensor used) is mV / V, A Th and A Tq It is the correction factor of each data derived in advance through the calibration operation. Th and I Tq is the interference factor between the various data derived in advance through the calibration operation, and T H-C and T Q-C These are the resultant values ​​of thrust and torque finally corrected by the data processing board 17 .

[0097] In addition, in the above [Mathematical formula 1], considering A Th , A Tq ,I Th and I Tq Regarding the problem that the number of shaft rotations n changes, the above [Formula 1] can be corrected to the following [Formula 2].

[0098]

Mathematical formula 2

[0099]

[0100] Thus, the influence of interference on the thrust and torque measurement values ​​can be corrected in the manner as described above. Moreover, the thrust and torque measurement device 10 according to the embodiment of the present invention can perform the function of monitoring whether the alignment state of the shaft is abnormal.

[0101] That is, the thrust and torque measuring device 10 according to the embodiment of the present invention can operate in two functions, namely, the "axis alignment mode" and the "measurement mode". First, in the measurement mode, the thrust and torque data can be measured and the interference can be corrected in the same manner as in the conventional manner as described above.

[0102] Furthermore, in the shaft alignment mode, the degree of deformation of the coupling 14 can be confirmed by the alignment load cell installed in the coupling 14 in the manner described above, and thereby the deformation of the coupling 14 can be confirmed in the shaft alignment mode installed in the model ship. as well as When the axis alignment state between the two axes exceeds the preset error range, a warning or alarm is generated, thereby executing the axis alignment readjustment process.

[0103] That is, the data processing board 17 can, in the measurement mode, measure the thrust and torque and correct the interference in the manner as described above, and then transmit the corrected data to an external instrument such as a measuring PC or a server through wireless communication according to the preset settings. In the axis alignment mode, it can generate a warning or alarm according to the preset settings based on the measured value of the alignment force sensor when the deformation degree of the coupling 14 exceeds the set reference value or range, and transmit a re-adjustment request notification to the preset contact information of the administrator, etc.

[0104] It should be noted that, in the embodiment of the present invention, the present invention is explained by taking the case where the data processing board 17 works in the measurement mode and the axis alignment mode as an example, but the present invention is not limited to the contents proposed in the embodiment, that is, the thrust and torque measuring device 10 according to the embodiment of the present invention may also include, for example, a database unit that pre-stores data such as various correction coefficients derived in advance for correcting the measured values, and is used to store various data such as various measured values ​​obtained through the processing process as described above and the corrected final result values. In addition to the structure proposed in the embodiment, the present invention may also be modified and changed as needed by relevant practitioners within the scope of the subject matter and essence of the present invention.

[0105] Therefore, the thrust and torque measuring device for ship model testing using data post-processing according to an embodiment of the present invention can be implemented in the manner described above. Thus, in the present invention, the thrust and torque measurement values ​​can be post-processed by the data processing board 17, thereby correcting the interference between all data and eliminating the unreliability of the output value caused by cable sagging through wireless data communication.

[0106] Furthermore, in the present invention, the precision of the result value can be improved by considering the shape of the force sensor 12 for thrust measurement or the characteristics of the coupling 14, and the axis alignment state can be confirmed by the force sensor installed in the coupling 14, so that the test can be performed more accurately and the result data can be obtained compared with the existing method.

[0107] In the above content, the details of the thrust and torque measuring device for ship model testing using data post-processing according to the present invention are explained through the embodiments of the present invention, but the present invention is not limited to the contents described in the embodiments. Therefore, personnel with general knowledge in the technical field to which the present invention belongs can make various modifications, changes, combinations and substitutions to the present invention according to design requirements and other factors.

Claims

1. A thrust and torque measuring device for ship model testing using data post-processing, characterized in that: include: Thrust bearing, installed on the propeller drive shaft; A thrust measurement force sensor installed on one side of the thrust bearing in order to measure the thrust transmitted through the thrust bearing; a torque measuring load cell mounted on the drive shaft to measure the torque transmitted through the thrust bearing; A coupling installed between the thrust bearing and the torque measuring load cell; an encoder mounted on the other end of the torque measuring load cell in order to measure the rotation speed of the drive shaft; A slip ring is installed between the torque measuring force sensor and the drive motor; as well as The data processing board is used to perform processing for correcting the interference amount between the thrust and torque data based on the measurement values ​​measured by each load cell and determining whether the shaft alignment state is abnormal.

2. The thrust and torque measuring device for ship model testing using data post-processing according to claim 1, characterized in that: The thrust bearing is configured to rotate while transmitting the thrust applied to the drive shaft by the propeller, and is configured to transmit the thrust generated by the propeller to the thrust measuring load cell while transmitting the torque generated by the propeller to the torque measuring load cell.

3. The thrust and torque measuring device for ship model testing using data post-processing according to claim 1, characterized in that: The thrust measuring load cell is constituted by a uniaxial force measuring load cell for measuring the thrust generated in the propeller, and is configured to measure the thrust transmitted through the thrust bearing by being closely attached to the thrust bearing.

4. The thrust and torque measuring device for ship model testing using data post-processing according to claim 1, characterized in that: The torque measuring load cell is constituted by a rotational load cell for measuring torque generated in a propeller, and is configured to measure torque transmitted through the thrust bearing and the coupling.

5. The thrust and torque measuring device for ship model testing using data post-processing according to claim 1, characterized in that: The coupling is configured so that both deformation due to the thrust of the propeller and deformation due to the torque of the propeller are linearly deformed, and is configured so that one end is connected to the thrust bearing and the other end is connected to the torque measuring load cell.

6. The thrust and torque measuring device for ship model testing using data post-processing according to claim 1, characterized in that: The slip ring is constituted by a rotary connector for power supply and data communication, and is configured to be arranged between the torque measuring load cell and the drive motor.

7. The thrust and torque measuring device for ship model testing using data post-processing according to claim 1, characterized in that: The data processing board includes a wireless data communication module, and the data processing board is configured to receive various measurement values ​​from the force sensor for measuring thrust and the force sensor for measuring torque through wireless data communication and correct the interference between the thrust and torque data, and transmit the various measurement values ​​and the corrected measurement values ​​to an external instrument through wireless data communication according to preset settings.

8. The thrust and torque measuring device for ship model testing using data post-processing according to claim 7, characterized in that: The data processing board is configured to perform a process of correcting the interference amount between thrust and torque data using the following mathematical formula: (in, T H-C : Corrected thrust data [N], T H-C : Corrected torque data [Nm], A Th :Calibration factor [N / (mV / V)], A Tq :Torque correction factor (Calibration factor) [Nm / (mV / V)], I Th : Thrust interference factor due to torque (factor) [N / Nm], I Tq : Torque interference factor due to thrust (factor) [Nm / N], T H-R : The raw data of the measured thrust (Raw data) [mV / V], T Q-R : Raw data of the measured torque (Raw data) [mV / V]).

9. The thrust and torque measuring device for ship model testing using data post-processing according to claim 7, characterized in that: The data processing board is configured to perform a process of correcting the interference amount between thrust and torque data using the following mathematical formula: (in, T H-C : Corrected thrust data [N], T H-C : Corrected torque data [Nm], A Th :Calibration factor [N / (mV / V)], A Tq :Torque correction factor (Calibration factor) [Nm / (mV / V)], I Th : Thrust interference factor due to torque (factor) [N / Nm], I Tq : Torque interference factor due to thrust (factor) [Nm / N], T H-R : The raw data of the measured thrust (Raw data) [mV / V], T Q-R : The raw data of the measured torque (Raw data) [mV / V], n: number of shaft revolutions).

10. The thrust and torque measuring device for ship model testing using data post-processing according to claim 1, characterized in that: The coupling comprises an alignment force sensor for determining whether the alignment state between the shafts is abnormal.

11. The thrust and torque measuring device for ship model testing using data post-processing according to claim 10, characterized in that: In the data processing board, According to the user's selection or preset settings, the measurement mode function and the axis alignment mode function are executed respectively. In the measurement mode function, the interference between thrust and torque measurement values ​​is corrected and the corrected data is transmitted to the external device via wireless communication according to the preset settings. In the shaft alignment mode function, a process is performed to generate a warning or alarm according to preset settings when the degree of deformation of the coupling exceeds a preset reference value based on the measurement value of the alignment force sensor, and to transmit a re-adjustment request notification to preset contact information including an administrator.

12. The thrust and torque measuring device for ship model testing using data post-processing according to claim 1, characterized in that: The measuring device also includes: The database unit stores in advance data including correction coefficients derived in advance for correcting the measured values, and is used to store various data including the measured values ​​and corrected final result values.

13. A method for measuring thrust and torque using the thrust and torque measuring device for ship model testing using data post-processing according to any one of claims 1 to 12, characterized in that: include: an alignment step, using the axis alignment mode of the thrust and torque measuring device to perform a process of checking and adjusting the alignment state; as well as The measuring step performs processing for measuring the thrust and torque respectively using the measuring mode of the thrust and torque measuring device aligned in the aligning step.

14. A ship model testing system, characterized in that: A thrust and torque measuring device for ship model testing using data post-processing according to any one of claims 1 to 12.

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