CN112461497A - Device, system and method for measuring splashing of towing tank model of seaplane - Google Patents
Device, system and method for measuring splashing of towing tank model of seaplane Download PDFInfo
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- CN112461497A CN112461497A CN202011226722.0A CN202011226722A CN112461497A CN 112461497 A CN112461497 A CN 112461497A CN 202011226722 A CN202011226722 A CN 202011226722A CN 112461497 A CN112461497 A CN 112461497A
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 87
- 238000006073 displacement reaction Methods 0.000 claims abstract description 66
- 239000000523 sample Substances 0.000 claims abstract description 61
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000011159 matrix material Substances 0.000 claims abstract description 4
- 230000000903 blocking effect Effects 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 6
- 238000004544 sputter deposition Methods 0.000 claims description 3
- 238000000691 measurement method Methods 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 11
- 238000009434 installation Methods 0.000 description 6
- 238000000926 separation method Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
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- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention belongs to the field of test of hydrodynamic performance of a seaplane model, and particularly relates to a device, a system and a method for measuring splashing of a model of a towing tank of a seaplane. The device includes: a mounting bracket disposed below the trailer and including a horizontal portion located at a position rearward of the model; the driving mechanism is arranged in the trailer; the linear screw rods are distributed in a matrix manner in the horizontal direction, the tops of the linear screw rods are connected with the driving mechanism, and the linear screw rods are vertically fixed on the horizontal part of the mounting bracket; the screw rod displacement measuring mechanism is arranged below the horizontal part of the mounting bracket and is used for measuring the vertical displacement of the linear screw rod and is connected with the data signal collector through a signal wire; the high-precision liquid level probe is arranged at the bottom of the linear screw rod and used for detecting the splashing liquid level, and the high-precision liquid level probe is connected with the driving mechanism through a feedback signal line and used for stopping the linear screw rod after contacting water. The device is simple in structure and can directly obtain the coordinate value of the splash contour in real time.
Description
Technical Field
The invention belongs to the field of test of hydrodynamic performance of a seaplane model, and particularly relates to a device, a system and a method for measuring splashing of a model of a towing tank of a seaplane.
Background
At present, in the aspect of measuring splashing domestically and abroad, a grid photographing method is adopted as a mainstream method, a corresponding coordinate position of a splashing point on a grid is read through a photographed picture, and finally a splashing envelope line is drawn. The American Davidson laboratory takes a picture of three views of model splash on the same negative film by using a mirror, takes a side grid of the model as a background on the side view, directly reads the height coordinate of a main splash peak point higher than the straight line of a front keel and the longitudinal coordinate of a relative main step, and reads the transverse coordinate of the main splash peak point when the position of a tail grid is adjusted to the periphery of the longitudinal position of the main splash peak point in the front view. Finally, the front and side views of the spray envelope as a function of speed and load are shown graphically, with the main test devices used being cameras and grid scales. The main disadvantages of this type of device are:
the real-time performance and the precision of the measuring result of the splash contour are not good, and the coordinate value of the splash contour cannot be directly given by the device, but the coordinate value is estimated after the comparison and analysis of the picture at the later stage, so that the factors influencing the test result are more, and larger errors are easy to generate.
The test device has high installation requirements, and the installation distance, angle and position relation of the model between the camera and the grid can influence the measurement precision, so that higher installation precision is required.
Disclosure of Invention
The purpose of the invention is as follows: a device, a system and a method for measuring splashing of a model of a towing tank of a seaplane are provided, so as to directly obtain coordinate values of a splashing profile in real time.
The technical scheme is as follows:
in a first aspect, there is provided a seaplane tow pool model splash measurement apparatus comprising: a mounting bracket disposed below the trailer and including a horizontal portion located at a position rearward of the model; the driving mechanism is arranged in the trailer; the linear screw rods are distributed in a matrix manner in the horizontal direction, the tops of the linear screw rods are connected with the driving mechanism, and the linear screw rods are vertically fixed on the horizontal part of the mounting bracket; the screw rod displacement measuring mechanism is arranged below the horizontal part of the mounting bracket and is used for measuring the vertical displacement of the linear screw rod and is connected with the data signal collector through a signal wire; the high-precision liquid level probe is arranged at the bottom of the linear screw rod and used for detecting the splashing liquid level, and the high-precision liquid level probe is connected with the driving mechanism through a feedback signal line and used for stopping the linear screw rod after contacting water.
Further, the screw rod displacement measuring mechanism comprises a laser displacement sensor and a laser reflection blocking piece, wherein the laser reflection blocking piece is arranged at the bottom of the linear screw rod; the laser displacement sensor is arranged at the position where the linear screw rod and the mounting bracket are fixed, the laser displacement sensor is right opposite to the laser reflection blocking piece, and the laser displacement sensor is connected with the data signal collector through a signal line.
Furthermore, the driving mechanism comprises a micro servo motor, a motor driver and a motor motion control cabinet, wherein the micro servo motor is connected with the top of the linear screw rod; the motor driver is connected with the micro servo motor through a power line and a control line and is used for controlling the motion of the micro servo motor; the motor motion control cabinet is connected with the motor driver and used for sending control signals to the motor driver.
Further, the linear screw rod is fixed on the horizontal part of the mounting bracket through the clamping ring.
Further, the high-precision liquid level probe is a liquid level relay.
The trailer is characterized by further comprising a circular pipe sword and a trailer side bridge, wherein two ends of the trailer side bridge are fixedly connected below the trailer respectively, one end of the circular pipe sword is connected with the middle section of the trailer side bridge, and the other end of the circular pipe sword is connected with the model; the mounting bracket is fixedly connected with the middle section of the circular pipe sword.
Further, the screw rod displacement measuring mechanism comprises a stay wire displacement sensor and a stay wire fixing part, wherein the stay wire fixing part is arranged at the bottom of the linear screw rod; the stay wire displacement sensor is arranged at the position where the linear lead screw is fixed with the mounting bracket, the stay wire displacement sensor is opposite to the stay wire fixing part, and the stay wire displacement sensor is connected with the data signal collector through a signal wire.
In a second aspect, there is provided a seaplane tow pool model splash measurement system comprising: the above-described apparatus; the data signal collector is connected with the screw rod displacement measuring mechanism through a signal wire and is used for collecting the vertical displacement of the linear screw rod; and the data signal processor is connected with the data signal collector and used for acquiring the vertical displacement of the linear screw rods and determining the sputtering profile according to the position relation of each linear screw rod.
In a third aspect, there is provided a method of measuring splashing in a model of a tow pool of a seaplane, the method being performed by the system described above, the method comprising: after the water surface is completely calm, the driving mechanism drives the linear screw rod to move downwards at a uniform speed; after the liquid level probe touches water, the liquid level probe sends a water touch signal to the driving mechanism through a signal line; the driving mechanism stops moving the linear screw rod after receiving the water contact signal, and the position of the liquid level probe after the stopping movement is the zero position of the liquid level of the splashing profile; the position sensor sends the zero position of the liquid level of the splash outline to the data signal collector; integrally moving the plurality of linear screw rods to a certain distance away from the water surface by using a driving mechanism; accelerating the trailer to drive the model and the water surface wave-making measuring device to move to a specified speed; after the splashing is stable, all the linear screw rods are controlled to move downwards at a constant speed through the driving mechanism; after the liquid level probe touches water, the liquid level probe sends a water touch signal to the driving mechanism through a signal line; the driving mechanism stops moving the corresponding linear screw rod after receiving the water contact signal, and the position of the liquid level probe after the linear screw rod stops moving is the height of the splashing profile liquid level corresponding to the current linear screw rod; the displacement sensor sends the position of the liquid level probe to the data signal collector after the linear screw rod stops moving; the data signal collector collects the zero position of the liquid level of the splash outline and the position of the liquid level probe after the linear screw rod stops moving and starts the positions to the data signal processor; and the data signal processor receives the zero position of the liquid level of the splash profile and the position of the liquid level probe after the linear screw rods stop moving, and determines the wave-making profile of the water surface according to the position relation of the linear screw rods.
Further, actuating mechanism controls all straight-line lead screws to move downwards at a uniform speed, and specifically comprises: the motor motion control cabinet controls the micro servo motor through the motor driver to drive the linear screw rod to drive the liquid level probe to move downwards at a uniform speed.
Has the advantages that:
aiming at the vacancy of the existing test device, the invention designs and develops a special measuring device for the splash of the seaplane model, which is used for measuring the splash of the seaplane model in the test process of the towing tank. The testing device disclosed by the invention is simple in principle and reliable in operation. The coordinate values of all points of the model splash contour can be measured and fed back in real time, and the measurement accuracy is high; the testing device system adopts a modular design, and the device is simple and convenient to assemble and install.
Drawings
FIG. 1 is a schematic view of a device for measuring splash in a model of a towing tank of a seaplane according to an embodiment of the invention.
Detailed Description
In order to solve the problems in the prior art, the invention firstly provides a device for measuring the splashing of a model of a towing tank of a seaplane, which comprises: a mounting bracket disposed below the trailer and including a horizontal portion located at a position rearward of the model; the driving mechanism is arranged in the trailer; the linear screw rods are distributed in a matrix manner in the horizontal direction, the tops of the linear screw rods are connected with the driving mechanism, and the linear screw rods are vertically fixed on the horizontal part of the mounting bracket; the screw rod displacement measuring mechanism is arranged below the horizontal part of the mounting bracket and is used for measuring the vertical displacement of the linear screw rod and is connected with the data signal collector through a signal wire; the high-precision liquid level probe is arranged at the bottom of the linear screw rod and used for detecting the splashing liquid level, and the high-precision liquid level probe is connected with the driving mechanism through a feedback signal line and used for stopping the linear screw rod after contacting water.
Further, the screw rod displacement measuring mechanism comprises a laser displacement sensor and a laser reflection blocking piece, wherein the laser reflection blocking piece is arranged at the bottom of the linear screw rod; the laser displacement sensor is arranged at the position where the linear screw rod and the mounting bracket are fixed, the laser displacement sensor is right opposite to the laser reflection blocking piece, and the laser displacement sensor is connected with the data signal collector through a signal line.
Further, the drive mechanism includes: the device comprises a micro servo motor, a motor driver and a motor motion control cabinet, wherein the micro servo motor is connected with the top of a linear screw rod; the motor driver is connected with the micro servo motor through a power line and a control line and is used for controlling the motion of the micro servo motor; the motor motion control cabinet is connected with the motor driver and used for sending control signals to the motor driver.
Further, the linear screw rod is fixed on the horizontal part of the mounting bracket through the clamping ring.
Further, the high-precision liquid level probe is a liquid level relay.
The trailer is characterized by further comprising a circular pipe sword and a trailer side bridge, wherein two ends of the trailer side bridge are fixedly connected below the trailer respectively, one end of the circular pipe sword is connected with the middle section of the trailer side bridge, and the other end of the circular pipe sword is connected with the model; the mounting bracket is fixedly connected with the middle section of the circular pipe sword.
Further, the screw rod displacement measuring mechanism comprises a stay wire displacement sensor and a stay wire fixing part, wherein the stay wire fixing part is arranged at the bottom of the linear screw rod; the stay wire displacement sensor is arranged at the position where the linear lead screw is fixed with the mounting bracket, the stay wire displacement sensor is opposite to the stay wire fixing part, and the stay wire displacement sensor is connected with the data signal collector through a signal wire.
In order to solve the problems in the prior art, the invention also provides a measuring system for the model splash of the towing tank of the seaplane, which comprises: the above-described device; the data signal collector is connected with the screw rod displacement measuring mechanism through a signal wire and is used for collecting the vertical displacement of the linear screw rod; and the data signal processor is connected with the data signal collector and used for acquiring the vertical displacement of the linear screw rods and determining the sputtering profile according to the position relation of each linear screw rod.
In order to solve the problems in the prior art, the invention further provides a method for measuring splashing of a model of a towing tank of a seaplane, which is implemented by means of the system, and comprises the following steps: after the water surface is completely calm, the driving mechanism drives the linear screw rod to move downwards at a uniform speed; after the liquid level probe touches water, the liquid level probe sends a water touch signal to the driving mechanism through a signal line; the driving mechanism stops moving the linear screw rod after receiving the water contact signal, and the position of the liquid level probe after the stopping movement is the zero position of the liquid level of the splashing profile; the position sensor sends the zero position of the liquid level of the splash outline to the data signal collector; integrally moving the plurality of linear screw rods to a certain distance away from the water surface by using a driving mechanism; accelerating the trailer to drive the model and the water surface wave-making measuring device to move to a specified speed; after the splashing is stable, all the linear screw rods are controlled to move downwards at a constant speed through the driving mechanism; after the liquid level probe touches water, the liquid level probe sends a water touch signal to the driving mechanism through a signal line; the driving mechanism stops moving the corresponding linear screw rod after receiving the water contact signal, and the position of the liquid level probe after the linear screw rod stops moving is the height of the splashing profile liquid level corresponding to the current linear screw rod; the displacement sensor sends the position of the liquid level probe to the data signal collector after the linear screw rod stops moving; the data signal collector collects the zero position of the liquid level of the splash outline and the position of the liquid level probe after the linear screw rod stops moving and starts the positions to the data signal processor; and the data signal processor receives the zero position of the liquid level of the splash profile and the position of the liquid level probe after the linear screw rods stop moving, and determines the wave-making profile of the water surface according to the position relation of the linear screw rods.
Further, actuating mechanism controls all straight-line lead screws to move downwards at a uniform speed, and specifically comprises: the motor motion control cabinet controls the micro servo motor through the motor driver to drive the linear screw rod to drive the liquid level probe to move downwards at a uniform speed.
The following detailed description is made with reference to the accompanying drawings.
Example (b):
referring to fig. 1, the apparatus of the embodiment of the present invention mainly includes the following components: the device comprises a high-precision liquid level probe 1, a linear screw rod 2, a micro servo motor 3, a motor driver 4, a motor motion control cabinet 5, a laser displacement sensor 6, a laser reflection blocking piece 7, a data signal collector 8, a power line 9, a control line 10, a signal line 11, a feedback signal line 12, a clamping ring 13, a mounting bracket 14, a circular pipe sword 15 and a trailer side bridge 16. The high-precision liquid level probe 1 is mainly used for detecting a splash liquid level and feeding back a signal to the motor motion control cabinet 5 through the feedback signal line 12, the linear lead screw 2 is mainly used for driving the high-precision liquid level probe 1 to move up and down along a vertical plane, the micro servo motor 3 is mainly used for driving the linear lead screw 2, the motor driver 4 mainly controls the motion of the micro servo motor 3 through the power line 9 and the control line 10, the motor motion control cabinet 5 is mainly used for sending a control signal to the motor driver 4, and the laser displacement sensor 6 and the laser reflection blocking piece 7 are mainly used for measuring a displacement signal of the high-precision liquid level probe 1 and feeding back the displacement signal to the data signal collector 8 through the signal line 11 to. The clamping ring 13, the mounting bracket 14, the circular pipe sword 15 and the trailer side bridge 16 are mainly used for device installation.
The high-precision liquid level probe 1 and the laser reflection blocking piece 7 are installed at the bottom of the linear screw rod 2, and the high-precision liquid level probe 1 is connected with the motor motion control cabinet 5 through a feedback signal line 12. The miniature servo motor 3 is installed at the top of the linear screw rod 2, the miniature servo motor 3 is connected with the motor driver 4 through a power line 9 and a control line 10, and the motor driver 4 is installed inside the motor motion control cabinet 5. Circular pipe sword 15 is installed on trailer side bridge 16, and installing support 14 is fixed on circular pipe sword 15, and sharp lead screw 2 passes through snap ring 13 to be fixed on installing support 14, and the terminal surface is installed laser displacement sensor 6 and just is to laser reflection separation blade 7 under snap ring 13, and laser displacement sensor 6 passes through the signal line and is connected with data signal collector 8.
In the embodiment of the invention, the servo motor is used for driving the electric screw rod to drive the high-precision liquid level probe to move up and down, and the embodiment of the invention can also be realized by directly adopting a mode that a direct current motor electric push rod and a stepping motor are provided with a screw rod. Wherein, if adopt direct current motor electric putter, the outer wall of push rod is used for installing snap ring 13, then can fix electric putter on installing support 14 through snap ring 13, and liquid level probe 1 is fixed on electric putter can reciprocating telescopic motion's interior pole. If the mode that the stepping motor is provided with the screw rod is adopted, the stepping motor reciprocates up and down on the screw rod, so the liquid level probe 1 is fixed on the stepping motor, and the screw rod is fixed on the mounting bracket 14 through the clamping ring 13.
In the embodiment of the invention, the liquid level probe movement distance is measured by using a laser displacement sensor and a laser reflection blocking sheet mode, so that the liquid level height is obtained. The movement distance of the liquid level probe can also be measured by adopting a stay wire type displacement sensor and an ultrasonic ranging displacement sensor. Wherein, if the pull-wire type displacement sensor is adopted, the sensor needs to be fixed on the snap ring 13, and meanwhile, a hook is required to be arranged at the bottom of the linear screw rod 2 for hanging the pull wire of the sensor, so that the pull wire of the sensor can be driven to stretch up and down to feed back the displacement when the linear screw rod 2 reciprocates. If adopt ultrasonic ranging displacement sensor, then need fix the sensor on snap ring 13 with laser displacement sensor is the same, need be used for reflecting the ultrasonic wave at an ultrasonic reflection separation blade of 2 bottom installations of sharp lead screw simultaneously, will drive reflection separation blade up-and-down motion when 2 reciprocating motion of sharp lead screw like this, the sensor feeds back the displacement volume through the movement distance who detects the separation blade.
Specifically, before the test, after the water surface is completely calm, the motor motion control cabinet 5 starts the micro servo motor 3 through the motor driver 4 to drive the linear screw rod 2 to drive the high-precision liquid level probe 1 to move downwards at a uniform speed, after the high-precision liquid level probe 1 just touches water, a water touch signal is transmitted to the motor motion control cabinet 5 through the feedback signal line 12, the motor motion control cabinet 5 immediately controls the micro servo motor 3 to stop moving through the motor driver 4, the position of the high-precision liquid level probe 1 is used as a splash contour liquid level zero point at the moment, and meanwhile, the laser displacement sensor 6 feeds the liquid level zero point signal back to the data signal collector 8 to be recorded. Then the motor motion control cabinet 5 controls the micro servo motor 3 through the motor driver 4 to drive the linear screw rod 2 to improve the high-precision liquid level probe 1 to a certain distance above the water surface, and the position is higher than the splashing outline position of the point model.
During the test, the trailer drives the model to accelerate to the designated speed, after the splash is stable, the motor motion control cabinet 5 controls the micro servo motor 3 through the motor driver 4 to drive the linear screw rod 2 to drive the high-precision liquid level probe 1 to move downwards at a uniform speed, after the high-precision liquid level probe 1 just touches water, the water touch signal is transmitted to the motor motion control cabinet 5 through the feedback signal line 12, the motor motion control cabinet 5 immediately controls the micro servo motor 3 through the motor driver 4 to stop moving, the position of the high-precision liquid level probe 1 is taken as the liquid level height of the splash outline at the moment, and meanwhile, the laser displacement sensor 6 feeds the liquid level signal back to the data signal collector 8 to be recorded. The difference between the liquid level height value and the liquid level zero value is the coordinate point of the splash outline in the height direction, and the coordinate points of the longitudinal direction and the transverse direction of the probe relative to the model position can be directly obtained during installation, so that the accurate position coordinate point of the splash outline relative to the model can be obtained for drawing the splash outline.
The accessories that the device adopted are the product that the maturity is high, and the reliability is high, and experimental data repeatability is good, and experimental data precision is also higher. And the whole system adopts the modularized design, is convenient to install, maintain and replace, and can freely adjust the device (increase and reduce the number of probes, change the length and the width of a measuring area and the like) according to the splashing characteristics of different models. The splash profile measuring device is simple and convenient to use, and can be widely applied to splash profile measurement of surface ships and amphibious equipment.
Claims (10)
1. A seaplane tow pool model splash measuring device, comprising:
a mounting bracket disposed below the trailer and including a horizontal portion located at a position rearward of the model;
the driving mechanism is arranged in the trailer;
the linear screw rods are distributed in a matrix manner in the horizontal direction, the tops of the linear screw rods are connected with the driving mechanism, and the linear screw rods are vertically fixed on the horizontal part of the mounting bracket;
the screw rod displacement measuring mechanism is arranged below the horizontal part of the mounting bracket and is used for measuring the vertical displacement of the linear screw rod and is connected with the data signal collector through a signal wire;
the high-precision liquid level probe is arranged at the bottom of the linear screw rod and used for detecting the splashing liquid level, and the high-precision liquid level probe is connected with the driving mechanism through a feedback signal line and used for stopping the linear screw rod after contacting water.
2. The device of claim 1, wherein the screw displacement measuring mechanism comprises a laser displacement sensor and a laser reflection baffle, wherein the laser reflection baffle is arranged at the bottom of the linear screw; the laser displacement sensor is arranged at the position where the linear screw rod and the mounting bracket are fixed, the laser displacement sensor is right opposite to the laser reflection blocking piece, and the laser displacement sensor is connected with the data signal collector through a signal line.
3. The device of claim 1, wherein the driving mechanism comprises a micro servo motor, a motor driver and a motor motion control cabinet, wherein the micro servo motor is connected with the top of the linear screw rod; the motor driver is connected with the micro servo motor through a power line and a control line and is used for controlling the motion of the micro servo motor; the motor motion control cabinet is connected with the motor driver and used for sending control signals to the motor driver.
4. The apparatus of claim 1, further comprising a snap ring, wherein the linear screw is fixed to the horizontal portion of the mounting bracket by the snap ring.
5. The apparatus of claim 1, wherein the high precision level probe is a level relay.
6. The device of claim 1, further comprising a circular pipe sword and a trailer side bridge, wherein two ends of the trailer side bridge are fixedly connected below the trailer respectively, one end of the circular pipe sword is connected with the middle section of the trailer side bridge, and the other end of the circular pipe sword is connected with the model; the mounting bracket is fixedly connected with the middle section of the circular pipe sword.
7. The device of claim 1, wherein the lead screw displacement measuring mechanism comprises a pull wire displacement sensor and a pull wire fixing part, wherein the pull wire fixing part is arranged at the bottom of the linear lead screw; the stay wire displacement sensor is arranged at the position where the linear lead screw is fixed with the mounting bracket, the stay wire displacement sensor is opposite to the stay wire fixing part, and the stay wire displacement sensor is connected with the data signal collector through a signal wire.
8. A seaplane tow pool model splash measurement system, comprising:
the device of claims 1 to 7; and
the data signal collector is connected with the screw rod displacement measuring mechanism through a signal wire and is used for collecting the vertical displacement of the linear screw rod;
and the data signal processor is connected with the data signal collector and used for acquiring the vertical displacement of the linear screw rods and determining the sputtering profile according to the position relation of each linear screw rod.
9. A seaplane tow pool model splash measurement method, characterized in that it is performed by means of the system of claim 8, the method comprising:
after the water surface is completely calm, the driving mechanism drives the linear screw rod to move downwards at a uniform speed;
after the liquid level probe touches water, the liquid level probe sends a water touch signal to the driving mechanism through a signal line;
the driving mechanism stops moving the linear screw rod after receiving the water contact signal, and the position of the liquid level probe after the stopping movement is the zero position of the liquid level of the splashing profile;
the position sensor sends the zero position of the liquid level of the splash outline to the data signal collector;
integrally moving the plurality of linear screw rods to a certain distance away from the water surface by using a driving mechanism;
accelerating the trailer to drive the model and the water surface wave-making measuring device to move to a specified speed;
after the splashing is stable, all the linear screw rods are controlled to move downwards at a constant speed through the driving mechanism;
after the liquid level probe touches water, the liquid level probe sends a water touch signal to the driving mechanism through a signal line;
the driving mechanism stops moving the corresponding linear screw rod after receiving the water contact signal, and the position of the liquid level probe after the linear screw rod stops moving is the height of the splashing profile liquid level corresponding to the current linear screw rod;
the displacement sensor sends the position of the liquid level probe to the data signal collector after the linear screw rod stops moving;
the data signal collector collects the zero position of the liquid level of the splash outline and the position of the liquid level probe after the linear screw rod stops moving and starts the positions to the data signal processor;
and the data signal processor receives the zero position of the liquid level of the splash profile and the position of the liquid level probe after the linear screw rods stop moving, and determines the wave-making profile of the water surface according to the position relation of the linear screw rods.
10. The method according to claim 9, wherein the driving mechanism controls all the linear screws to move downwards at a uniform speed, and specifically comprises:
the motor motion control cabinet controls the micro servo motor through the motor driver to drive the linear screw rod to drive the liquid level probe to move downwards at a uniform speed.
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| CN202011226722.0A CN112461497B (en) | 2020-11-05 | 2020-11-05 | Device, system and method for measuring splashing of towing tank model of seaplane |
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