CN117906898A - Speed monitoring and controlling method for large-breadth high-speed moving belt - Google Patents
Speed monitoring and controlling method for large-breadth high-speed moving belt Download PDFInfo
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- CN117906898A CN117906898A CN202410055186.4A CN202410055186A CN117906898A CN 117906898 A CN117906898 A CN 117906898A CN 202410055186 A CN202410055186 A CN 202410055186A CN 117906898 A CN117906898 A CN 117906898A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000033001 locomotion Effects 0.000 claims description 17
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 230000001276 controlling effect Effects 0.000 claims description 8
- 238000007667 floating Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 9
- 239000000758 substrate Substances 0.000 abstract description 3
- 239000011159 matrix material Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Abstract
The invention relates to the field of wind tunnel tests, in particular to a speed monitoring and controlling method for a large-breadth high-speed moving belt, which comprises the following steps that a driving roller and a driven roller arranged on two sides of a supporting substrate drive the moving belt to move, the moving belt moves to simulate the moving ground, a laser speed measuring sensor and a machine vision camera are arranged on the supporting substrate, the laser speed measuring sensor is used for monitoring the moving speed of the moving belt, and the machine vision camera is used for monitoring the moving mode of the moving belt; a speed monitoring and control method is provided.
Description
Technical Field
The invention relates to the field of wind tunnel tests, in particular to a speed monitoring and controlling method for a large-breadth high-speed moving belt.
Background
Wind tunnel testing is an integral part of the development work of aircraft. During the test, the model or the real object is usually fixed in a wind tunnel for repeated blowing, and test data are obtained through a measurement and control instrument and equipment. But in real flight the stationary atmosphere is borderless. In wind tunnels, the airflow is bordered, and the existence of the borderline limits the bending of flow lines near the borderline, so that the flow field of the wind tunnel is different from that of a real flight. Such boundary effects will result in inaccurate measurement of the aerodynamic parameters of the test object. Therefore, the ground of the test section often needs to be moved during the wind tunnel test. Wherein the speed of the moving belt is the same as the wind speed. Meanwhile, the moving belt is subjected to pneumatic load caused by the upper test model in the wind tunnel. Thus, the ability to ensure stable high-speed motion of the moving belt under high load becomes necessary for the simulation of the moving road surface.
Disclosure of Invention
The invention aims to provide a speed monitoring and controlling method for a large-format high-speed moving belt, and provides a speed monitoring and controlling method.
The aim of the invention is achieved by the following technical scheme:
The method comprises the following steps of driving a moving belt to move through driving rollers and driven rollers arranged on two sides of a supporting base body, simulating the movement of the moving belt to move the ground, arranging two laser speed measuring sensors and two machine vision cameras on the supporting base body, wherein the two laser speed measuring sensors are respectively arranged on the inner side of the driving rollers and the inner side of the driven rollers, the two laser speed measuring sensors are used for monitoring the moving speed of the moving belt, and the two machine vision cameras are respectively positioned on the same vertical surface with the two laser speed measuring sensors and are used for monitoring the movement mode of the moving belt.
A reflective patch is attached to the inside of the movable belt and provides a speed measuring mark for the laser speed measuring sensor;
The wind tunnel movable floor equipment comprises a supporting base body, wherein one side of the supporting base body is rotationally connected with a driving roller, and a three-phase asynchronous motor for driving the driving roller to rotate is fixedly connected to the supporting base body;
Two cylinders are fixedly connected to opposite sides of the driving roller on the supporting substrate, seat bearings are fixedly connected to telescopic ends of the two cylinders, a driven roller is rotatably connected between the two seat bearings, a movable belt is connected between the driving roller and the driven roller, and a reflective patch is attached to the inside of the movable belt;
The support matrix is provided with two laser speed measuring sensors and two machine vision cameras, the two laser speed measuring sensors are respectively arranged at the inner side of the driving roller and the inner side of the driven roller, the two laser speed measuring sensors are used for monitoring the moving speed of the moving belt, the two machine vision cameras are respectively positioned on the same vertical plane with the two laser speed measuring sensors, and the two machine vision cameras are used for monitoring the moving mode of the moving belt;
The support matrix is provided with an air floatation system, the air floatation system comprises an air floatation plate, and the air floatation plate is fixedly connected to the support matrix;
the air floating plate is provided with a plurality of air holes, and each air hole is internally provided with a high-pressure air hole and a negative-pressure air hole in an alternating manner;
The high-pressure air hole provides high pressure by using a high-pressure air supply system, and the negative-pressure air hole provides negative pressure by using a negative-pressure air suction system;
The high-pressure air supply system comprises an air compressor, an air tank, a high-pressure air circuit and a pressure regulating valve;
the negative pressure air suction system comprises a vacuum pump and a vacuum regulating valve;
The device also comprises a control system, wherein the control system takes a PLC main control unit and an external intelligent control unit as cores, takes the real-time comprehensive speed of the moving belt monitored by the two laser speed measuring sensors as input, takes the output rotating speed of the driving three-phase asynchronous motor and the ejection length of the telescopic end of the cylinder as output, compensates the rotating speed error caused by friction transmission between the driving roller and the moving belt, and ensures that the moving belt accurately reaches the designated speed.
The beneficial effects of the invention are as follows:
By arranging two laser speed measuring sensors, the speed of the moving belt at the driving roller side and the driven roller side is monitored respectively, and the three-phase asynchronous motor and the air cylinder are controlled to move, so that the moving belt can reach the designated speed quickly; the movable belt generates a plurality of motion modes through the air floatation system.
Drawings
The invention will be described in further detail with reference to the accompanying drawings and detailed description.
FIG. 1 is a schematic view of a wind tunnel moving belt floor equipment structure of the present invention;
FIG. 2 is a schematic view of the internal structure of the wind tunnel moving belt floor equipment of the present invention;
FIG. 3 is a schematic view of the drive roller configuration of the present invention;
FIG. 4 is a schematic view of the structure of the driven roller of the present invention;
FIG. 5 is a schematic view of the support matrix structure of the present invention;
FIG. 6 is a schematic view of an air bearing plate according to the present invention;
FIG. 7 is a schematic diagram of the control process of the present invention;
fig. 8 is a wave mode speed monitoring schematic of the present invention.
In the figure: a support base 10; a driving roller 20; a three-phase asynchronous motor 21; a cylinder 31; a seated bearing 32; driven roller 40; a moving belt 50; a laser speed sensor 60; a machine vision camera 70; an air floatation system 80; an air bearing plate 81.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
As shown in fig. 1 to 8, the steps and functions of a speed monitoring and controlling method for a large-format high-speed moving belt are described in detail below;
The speed monitoring and controlling method for large-format high-speed moving belt comprises the following steps that a driving roller 20 and a driven roller 40 arranged on two sides of a supporting base body 10 are used for driving a moving belt 50 to move, the movement of the moving belt 50 simulates the moving ground, two laser speed measuring sensors 60 and two machine vision cameras 70 are arranged on the supporting base body 10, the two laser speed measuring sensors 60 are respectively arranged on the inner side of the driving roller 20 and the inner side of the driven roller 40, the two laser speed measuring sensors 60 are used for monitoring the moving speed of the moving belt 50, the two machine vision cameras 70 are respectively positioned on the same vertical surface with the two laser speed measuring sensors 60, and the two machine vision cameras 70 are used for monitoring the movement mode of the moving belt 50; a reflective patch is attached to the inside of the movable belt 50, and provides a speed measuring mark for the laser speed measuring sensor 60;
When the device is used, the two laser speed measuring sensors 60 are used for monitoring the speed of the moving belt 50 on the driving roller 20 side and the moving belt 50 on the driven roller 40 side, and the three-phase asynchronous motor 21 and the air cylinder 31 are controlled to move, so that the moving belt 52 quickly reaches a designated speed;
The machine vision camera 70 performs angle measurement on the moving belt 50 by a key point recognition algorithm and a gray scale recognition algorithm (rough points inside the moving belt 50 can be used as recognition key points).
As shown in fig. 1 to 8, a detailed description is given below of the structure and function of a wind tunnel moving belt floor apparatus;
The wind tunnel movable floor equipment comprises a support base body 10, wherein one side of the support base body 10 is rotatably connected with a driving roller 20, and a three-phase asynchronous motor 21 for driving the driving roller 20 to rotate is fixedly connected to the support base body 10;
when the three-phase asynchronous motor is used, the three-phase asynchronous motor 21 is started, the output shaft of the three-phase asynchronous motor 21 starts to rotate, the output shaft of the three-phase asynchronous motor 21 drives the driving roller 20 to rotate, and the driving roller 20 drives the movable belt 50 to rotate, so that the movable belt 50 moves rapidly;
Two cylinders 31 are fixedly connected to opposite sides of the driving roller 20 on the supporting base body 10, seat bearings 32 are fixedly connected to telescopic ends of the two cylinders 31, a driven roller 40 is rotatably connected between the two seat bearings 32, a movable belt 50 is connected between the driving roller 20 and the driven roller 40, and a reflective patch is attached to the inside of the movable belt 50; the sliding block is fixedly connected to the belt seat bearing 32, the sliding rail is fixedly connected to the supporting base body 10, the sliding block is slidably connected to the sliding rail, the grating is integrated on the sliding rail and used for monitoring the sliding position of the belt seat bearing 32, further monitoring the extending length of the telescopic end of the air cylinder 31, further monitoring the relative distance between the driving roller 20 and the driven roller 40 and further monitoring the tensioning length of the movable belt 50; the friction between the movable belt 50 and the driving roller 20 and the driven roller 40 is controlled by controlling the extension degree of the telescopic ends of the two cylinders 31, so that slipping is avoided;
The support matrix 10 is provided with two laser speed measuring sensors 60 and two machine vision cameras 70, the two laser speed measuring sensors 60 are respectively arranged at the inner side of the driving roller 20 and the inner side of the driven roller 40, the two laser speed measuring sensors 60 are used for monitoring the moving speed of the moving belt 50, the two machine vision cameras 70 are respectively positioned on the same vertical plane with the two laser speed measuring sensors 60, and the two machine vision cameras 70 are used for monitoring the moving mode of the moving belt 50;
The support base body 10 is provided with an air floatation system 80, the air floatation system 80 comprises an air floatation plate 81, and the air floatation plate 81 is fixedly connected to the support base body 10; the air floating plate 81 is provided with a plurality of air holes, and each air hole is internally provided with a high-pressure air hole and a negative-pressure air hole in an alternating manner; the high-pressure air hole provides high pressure by using a high-pressure air supply system, and the negative-pressure air hole provides negative pressure by using a negative-pressure air suction system; the high-pressure air supply system comprises an air compressor, an air tank, a high-pressure air circuit and a pressure regulating valve;
the high-pressure gas is obtained through the air compressor and stored through the air tank, water/oil in the air can be precipitated and primarily cooled in the process, a stable gas source can be provided for the follow-up process, then the gas is led to the high-pressure gas holes of each air floatation plate 81 through a plurality of high-pressure gas paths, and each high-pressure gas path is provided with a pressure regulating valve, so that the gas passes through the pressure regulating valve before entering the air floatation plate 81, and the high-pressure of the single air floatation plate 71 is regulated, so that the high-pressure gas with different pressures is provided for the movable belt 50; the pressure regulating valve is preferably an electric pressure regulating valve;
The negative pressure air extraction system comprises a vacuum pump and a vacuum regulating valve, wherein the vacuum pump is connected with negative pressure air holes of a plurality of air floating plates 81 through a plurality of air paths, and each air path is provided with the vacuum regulating valve so as to regulate the negative pressure of each air path;
the positive and negative pressures generated by the air floatation system 80 cause the moving belt 50 to generate a variety of motion patterns including:
leveling mode: at this time, the air bearing plate 81 operates with high pressure air holes, and the positive pressure value of each air hole is the same, so as to support and tension the moving belt 50, and the moving belt 50 keeps smooth during operation due to the same positive pressure value;
Wave mode: at this time, the high pressure and the negative pressure air holes of the air floating plate 81 are operated, the positive pressure value/the negative pressure value of the air holes are the same, and the high pressure air holes and the negative pressure air holes in each row are alternately operated according to the setting (for example, 1s for the high pressure air Kong Yunzhuai in the first row, 2s for the negative pressure air holes in the first row, and so on, the wave is propagated forward, so that the height of the moving belt 50 above each position is changed in real time), so as to realize the alternate blowing and suction of the moving belt 50, thereby realizing the alternate forward movement of the high and low fluctuation of the moving belt 50, namely, the wave mode;
Further, in the wave mode, the cylinder 31 is started, and the telescopic end of the cylinder 31 drives the moving belt 50 to move, so that the tensioning degree of the moving belt 50 is adjusted, the height of waves is controlled, and more road conditions are simulated;
further, in the wave mode, the cylinder 31 is started, and the telescopic end of the cylinder 31 can reciprocate within a small range, so that the whole movable belt 50 can shake, and more movement modes can be generated by the whole movable belt 50;
the laser speed sensor 60 monitors the horizontal translational velocity of the moving belt 50, and for wave motion patterns, the laser speed sensor 60 monitors the overall movement velocity V of the wave moving belt 50. But this is not the speed of movement of the moving belt 50. Thus, the actual speed of motion VS of the moving belt 50 is calculated using the machine vision camera 70 next to it to monitor the wave radians of this area, in combination with the horizontal speed V. It is determined from VS whether the moving belt 50 is slipping or stalling. In addition, V is the speed corresponding to the wind speed, and when it corresponds to the wind speed, it still needs to determine whether the moving belt slips, if so (representing that the moving belt 50 is not tight enough and the rotation speed of the three-phase asynchronous motor 21 is wasted), the rotation speed of the three-phase asynchronous motor 21 is tensioned and reduced, so that the energy consumption of the system operation can be reduced;
Coarse mode: at this time, the air bearing plate 81 operates at high pressure and negative pressure air holes, and the air pressure value of each air hole is different, and the positive pressure value/negative pressure value of each air hole is controlled by the control system, so that the moving belt 50 operates with a rough surface according to the setting;
the equipment also comprises a control system, wherein the control system takes a PLC main control unit and an external intelligent control unit as cores, takes the real-time comprehensive speed of the moving belt monitored by the two laser speed measuring sensors 60 as input, takes the output rotating speed of the driving three-phase asynchronous motor 21 and the ejection length of the telescopic end of the air cylinder 31 as output, compensates the rotating speed error caused by friction transmission between the driving roller 20 and the moving belt 50, and ensures that the moving belt 50 accurately reaches the designated speed;
According to the accumulated data of the long-term experiment, the corresponding output rotating speed of the three-phase asynchronous motor 21 and the ejection length of the air cylinder 31 under the different rotating speed requirements of different operation modes are automatically analyzed through an external intelligent module, the speed of the movable belt 50 is monitored in real time through a laser speed measuring sensor 60, a database is updated, and a data base is provided for the next faster speed required by the movable belt 50;
The movable belt 50 is driven by friction between the driving roller 20 and the driven roller 40, and when the movable belt 50 starts to operate, an external intelligent unit of the control system directly configures the output rotating speed of the three-phase asynchronous motor 21 meeting the requirements of the mode and the speed of the movable belt 50 according to the analysis of the early data; and the laser speed sensor 60 and the machine vision camera 70 monitor the comprehensive rotating speed of the movable belt 50 in real time;
Wherein, the laser speed sensor 60 near the driven roller 40 mainly monitors the area of the moving belt 50 which is most likely to stall, and when the moving belt 50 stalls in the monitored area, the control system controls the cylinder 31 to tension the moving belt 50;
the laser speed sensor 60 near the drive roller 20 mainly monitors the least stall-prone area of the movable belt 50, and when the stall of the movable belt in the area is monitored, the control system controls the three-phase asynchronous motor 21 to increase the rotating speed;
equivalently, the stall of the driven roller 40 is less severe than the stall of the driving roller 20, so that the driven roller 40 is tensioned, the driving roller 20 needs to be completed by adjusting the rotating speed, for example, 40r/min is needed, the stall of the driving region is needed, and the rotating speed of the three-phase asynchronous motor 21 needs to be 45r/min.
Claims (10)
1. A speed monitoring and controlling method for a large-format high-speed moving belt is characterized in that: the method comprises the following using mode that a driving roller (20) and a driven roller (40) arranged on two sides of a supporting base body (10) drive a movable belt (50) to move, the movement of the movable belt (50) simulates the movement of the ground, two laser speed measuring sensors (60) and two machine vision cameras (70) are arranged on the supporting base body (10), the two laser speed measuring sensors (60) are respectively arranged on the inner side of the driving roller (20) and the inner side of the driven roller (40), the two laser speed measuring sensors (60) are used for monitoring the movement speed of the movable belt (50), the two machine vision cameras (70) are respectively located on the same vertical plane with the two laser speed measuring sensors (60), and the two machine vision cameras (70) are used for monitoring the movement mode of the movable belt (50).
2. A speed monitoring and control method for large format high speed moving belts as claimed in claim 1, characterized by: the inside of the movable belt (50) is attached with a reflective patch, and the reflective patch provides a speed measuring mark for the laser speed measuring sensor (60).
3. A speed monitoring and control method for large format high speed moving belts as claimed in claim 1, characterized by: the method uses wind tunnel movable floor equipment, the equipment comprises a supporting base body (10), one side of the supporting base body (10) is rotatably connected with a driving roller (20), and a three-phase asynchronous motor (21) for driving the driving roller (20) to rotate is fixedly connected to the supporting base body (10).
4. A speed monitoring and control method for a large format high speed moving belt according to claim 3, characterized in that: two cylinders (31) are fixedly connected to opposite sides of the driving roller (20) on the supporting base body (10), seat bearings (32) are fixedly connected to telescopic ends of the two cylinders (31), and driven rollers (40) are rotatably connected between the two seat bearings (32).
5. A speed monitoring and control method for a large format high speed moving belt according to claim 3, characterized in that: the support base body (10) is provided with an air floatation system (80), the air floatation system (80) comprises an air floatation plate (81), and the air floatation plate (81) is fixedly connected to the support base body (10).
6. The method for speed monitoring and control of a large format high speed moving belt according to claim 5, wherein: the air floating plate (81) is provided with a plurality of air holes, and high-pressure air holes and negative-pressure air holes are alternately arranged in each air hole.
7. The speed monitoring and control method for a large format high speed moving belt of claim 6, wherein: the high-pressure air hole uses a high-pressure air supply system to provide high pressure, and the negative-pressure air hole uses a negative-pressure air suction system to provide negative pressure.
8. A speed monitoring and control method for large format high speed moving belts as claimed in claim 7, characterized in that: the high-pressure air supply system comprises an air compressor, an air tank, a high-pressure air circuit and a pressure regulating valve.
9. A speed monitoring and control method for large format high speed moving belts as claimed in claim 7, characterized in that: the negative pressure air suction system comprises a vacuum pump and a vacuum regulating valve.
10. The method for speed monitoring and control of a large format high speed moving belt according to claim 4, wherein: the device also comprises a control system, wherein the control system takes a PLC main control unit and an external intelligent control unit as cores, takes the real-time comprehensive speed of the moving belt monitored by the two laser speed measuring sensors (60) as input, takes the output rotating speed of the driving three-phase asynchronous motor (21) and the ejection length of the telescopic end of the air cylinder (31) as output, compensates the rotating speed error caused by friction transmission between the driving roller (20) and the moving belt (50), and ensures that the moving belt (50) accurately reaches the designated speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410055186.4A CN117906898A (en) | 2024-01-15 | 2024-01-15 | Speed monitoring and controlling method for large-breadth high-speed moving belt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410055186.4A CN117906898A (en) | 2024-01-15 | 2024-01-15 | Speed monitoring and controlling method for large-breadth high-speed moving belt |
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| CN117906898A true CN117906898A (en) | 2024-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202410055186.4A Pending CN117906898A (en) | 2024-01-15 | 2024-01-15 | Speed monitoring and controlling method for large-breadth high-speed moving belt |
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| CN (1) | CN117906898A (en) |
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- 2024-01-15 CN CN202410055186.4A patent/CN117906898A/en active Pending
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