Wind tunnel nozzle replacing device

Abstract

The wind tunnel nozzle replacing device comprises a moving track, a bidirectional transfer trolley is installed on the moving track in a matched mode to achieve movement of a nozzle and a plug-in, and the two sides of the moving track are provided with a plug-in area and a nozzle area which are symmetrical with the moving center line F of the moving track as the symmetry axis. A plurality of first standby storage racks are arranged in the plug-in area in the moving direction of the track moving track in a linear array mode, plug-ins are placed on the first standby storage racks, a plurality of second standby storage racks corresponding to the first standby storage racks in position are arranged in the spray pipe area, spray pipes are placed on the second standby storage racks, and control is conducted through the touch control screen. The position induction of the bidirectional transfer trolley and the storage rack is realized through the induction matching of the RFID card reading device and the RFID card, then the signal transmission of the rotating speed and the direction is realized, the programmable controller is utilized to control the digital speed regulator and the rotary encoder to adjust the rotating speed and the rotating direction of the driving motor, and the accurate positioning replacement of the wind tunnel nozzle is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of wind tunnel nozzle replacement, in particular to a wind tunnel nozzle replacement device. Background Art

[0002] A wind tunnel is a pipe-shaped test device that can artificially generate and control airflow to simulate the flow of gas around aircraft or objects, measure the effect of gas on objects, and observe physical phenomena.

[0003] The FL3 wind tunnel is a 3.5-meter wind tunnel. Various nozzles and plug-ins need to be replaced according to different test requirements. Currently, there are 4 sets of test section plug-ins and 4 types of nozzles, No. 1 to No. 8, which are arranged on both sides of the moving track, with 4 groups on each side. Currently, manual replacement is used.

[0004] The existing process for replacing plug-in and nozzles requires repeated plugging and unplugging of cables. Furthermore, when approaching the plug-in carriage in the test section, multiple fine-tuning adjustments are required to align the V-shaped track for replacement. This process requires careful observation by operators to avoid scratching or bumping. The overall process is cumbersome, inefficient, and poses safety risks.

[0005] Therefore, in view of the shortcomings of the existing technology, it is necessary to provide a wind tunnel nozzle replacement device to solve the shortcomings of the existing technology. Utility Model Content

[0006] The purpose of the present utility model is to avoid the shortcomings of the existing technology and provide a wind tunnel nozzle replacement device, which is controlled by a touch control screen, realizes the position sensing of the two-way transfer vehicle and the storage rack through the induction cooperation of the RFID card reader and the RFID card, and then realizes the signal transmission of the speed and rotation direction, and uses a programmable controller to control the digital speed regulator and the rotary encoder to adjust the speed and rotation direction of the drive motor, thereby realizing the precise positioning replacement of the wind tunnel nozzle.

[0007] The above-mentioned purpose of the present invention is achieved through the following technical means.

[0008] A wind tunnel nozzle replacement device is provided, comprising a movable track, on which a bidirectional transfer vehicle is mounted, wherein a plug-in area and a nozzle area are provided on both sides of the movable track, symmetrically with respect to a moving centerline F of the movable track as an axis of symmetry, wherein the plug-in area is provided with a plurality of first standby storage racks arranged in a linear array along the moving direction of the track, wherein plug-ins are placed on the first standby storage racks, and wherein the nozzle area is provided with a plurality of second standby storage racks corresponding to the positions of the first standby storage racks, wherein nozzles are placed on the second standby storage racks, and wherein first experimental storage racks and second experimental storage racks are provided on both sides of the movable track, wherein the first experimental storage racks are symmetrically with respect to the moving centerline F of the movable track as an axis of symmetry;

[0009] A driving motor is fixedly installed on the bidirectional transfer vehicle, and a rotary encoder and a digital speed regulator are electrically connected to the driving motor. An RFID card reader is also installed on the bidirectional transfer vehicle. The first standby storage rack, the second standby storage rack, the first experimental storage rack and the second experimental storage rack are all fixedly installed on one side of the bidirectional transfer vehicle with RFID cards arranged in sequence and inductively coordinated with the RFID card reader. The digital speed regulator and the rotary encoder are also wirelessly connected to the control cabinet.

[0010] Specifically, a programmable controller is fixedly installed inside the control cabinet, the programmable controller is wirelessly connected to the digital speed regulator and the rotary encoder, and a touch control screen is provided on the programmable controller.

[0011] Preferably, the distance between any two RFID cards is not less than 1 meter.

[0012] Specifically, two speed change areas are provided in the corresponding moving track portion between two adjacent RFID cards in the plug-in area and the nozzle area.

[0013] Furthermore, a travel switch is installed on the bidirectional transfer vehicle.

[0014] The utility model is controlled by a touch control screen, and the position sensing of the two-way transfer vehicle and the storage rack is realized through the induction cooperation of the RFID card reader and the RFID card, thereby realizing the signal transmission of the speed and rotation direction. The programmable controller is used to control the digital speed regulator and the rotary encoder to adjust the speed and rotation direction of the drive motor, thereby realizing the precise positioning and replacement of the wind tunnel nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described with reference to the accompanying drawings, but the contents in the accompanying drawings do not constitute any limitation to the present invention.

[0016] Figure 1 It is a schematic diagram of the top view of the wind tunnel nozzle replacement device of the utility model.

[0017] Figure 2 The utility model is a schematic diagram of the control logic structure of the wind tunnel nozzle replacement device.

[0018] Figure 3 It is a structural schematic diagram of the speed change area of ​​the wind tunnel nozzle replacement device of the utility model.

[0019] from Figures 1 to 3 Including:

[0020] 1. Moving track;

[0021] 2. Two-way transfer vehicle;

[0022] 3. Plug-in area;

[0023] 4. Nozzle area;

[0024] 5. First standby storage rack;

[0025] 6. Plugins;

[0026] 7. Second standby storage rack;

[0027] 8. Nozzle;

[0028] 9. First experimental storage rack;

[0029] 10. Second experimental storage rack;

[0030] 11. Driving motor;

[0031] 12. Rotary encoder;

[0032] 13. Digital speed regulator;

[0033] 14. RFID card reader;

[0034] 15. RFID card;

[0035] 16. Control cabinet;

[0036] 17. Programmable controller;

[0037] 18. Touch control screen;

[0038] 19. Speed ​​change area. DETAILED DESCRIPTION

[0039] The present invention will be further described with reference to the following embodiments.

[0040] Example 1.

[0041] like Figure 1-3 As shown, the wind tunnel nozzle replacement device includes a movable track 1, on which a bidirectional transfer vehicle 2 is installed. The bidirectional transfer vehicle 2 moves on the movable track 1 to realize the movement of the nozzle 8 and the plug-in 6. Both sides of the movable track 1 are provided with a plug-in area 6 3 and a nozzle 8 area 4 symmetrical with the moving center line F of the movable track 1 as the symmetry axis. The plug-in area 6 3 is provided with a plurality of first standby storage racks 5 in a linear array along the moving direction of the track 1, and the plug-in 6 is placed on the first standby storage rack 5. The nozzle 8 area 4 is provided with a plurality of second standby storage racks 7 corresponding to the position of the first standby storage rack 5, and the nozzle 8 is placed on the second standby storage rack 7. Both sides of the movable track 1 are also provided with a first experimental storage rack 9 and a second experimental storage rack 10 symmetrical with the moving center line F of the movable track 1 as the symmetry axis.

[0042] The first experimental storage rack 9 and the second experimental storage rack 10 are set as the origin of the bidirectional transfer vehicle 2, and then the first standby storage rack 5 and the second standby storage rack 7 are numbered in sequence. In this embodiment, numbers 1 to 8 are used for sorting to realize wireless control of the transfer vehicle operation.

[0043] A parallel power supply is adopted, and the driving mode of the transfer vehicle, that is, the 380V power cable driving mode, is retained. A new charging mode, that is, battery driving mode, is added. The battery is converted into 380V AC power as a new power source through an inverter for two-way control. A PLC unit is added to realize wireless intelligent operation of the nozzle 8 section and the test section plug-in 6. The system reaches the 4 first standby storage racks 5 and the second standby storage rack 7 positions with one click, and moves the nozzle 8 and plug-in 6 to the predetermined track. The system can reach any nozzle 8 or plug-in 6 position that needs to be replaced from the zero position with one click, and intelligently switch between different positions with one click.

[0044] A driving motor 11 is fixedly installed on the bidirectional transfer vehicle 2, and a rotary encoder 12 and a digital speed regulator 13 are electrically connected to the driving motor 11. The driving motor 11 is controlled by using a battery and an inverter. An RFID card reader 14 is also installed on the bidirectional transfer vehicle 2. The first standby storage rack 5, the second standby storage rack 7, the first experimental storage rack 9 and the second experimental storage rack 10 are all fixedly installed on one side of the bidirectional transfer vehicle 2 with RFID cards 15 arranged in sequence and inductively cooperating with the RFID card reader 14. The digital speed regulator 13 and the rotary encoder 12 are also wirelessly connected to the control cabinet 16.

[0045] The driving motor 11 is adjusted to change the rotation direction of the driving motor 11 through the rotary encoder 12, and the output speed of the driving motor 11 can be adjusted through the digital speed regulator 13 to achieve direction and speed adjustment of the bidirectional transfer vehicle 2.

[0046] The EMR10E low-frequency RFID card reader 14 based on radio frequency identification technology is used. The RFID card reader 14 has an operating frequency of 125KHZ and supports reading EMID and compatible tags. The RFID card reader 14 integrates an RFID radio frequency transceiver and a logic initialization circuit, and does not occupy the serial port. The system can easily read the data in the RFID card 15 through parallel interface devices such as PLC and single-chip microcomputer. After power-on, the RFID card reader 14 works in automatic reading mode. When the RFID card 15 enters the sensing area of ​​the RFID card reader 14, the RFID card reader 14 decodes the RFID card 15 and automatically sends the card encoding data. If the tag stays in the sensing area, the sensor will continue to send read data until the tag exits the effective range of the card reader.

[0047] The RFID card reader device 14 needs to be installed on the side of the nozzle 8 and plug-in 6 that need to be replaced to calibrate the position for positioning the transfer vehicle. The RFID card 15 cannot be attached to a place where the wheels may roll over it. The card reader is installed facing the card. The card reader surface and the card are kept horizontal as much as possible to avoid tilting. The sensing distance between the card reading surface of the RFID card reader device 14 and the card is 10% to 70% of the maximum sensing distance, that is, 2-14cm, to ensure the reliability of card reading. The side of the RFID card reader device 14 should be greater than 35cm away from the metal structure; the RFID card reader device 14 should be kept as far away as possible from equipment that is prone to electromagnetic interference, such as motors and power modules.

[0048] A programmable controller 17 is fixedly installed inside the control cabinet 16 . The programmable controller 17 is wirelessly connected to the digital speed regulator 13 and the rotary encoder 12 . A touch control screen 18 is provided on the programmable controller 17 .

[0049] The system uses an incremental rotary encoder 12 and a travel switch to jointly locate the current position of the bidirectional transfer vehicle 2, and feeds back the pulses of the rotary encoder 12 to the programmable controller 17. The programmable controller 17 calibrates the distance between different stations and the origin position by calculating the number of pulses when the bidirectional transfer vehicle 2 travels to different storage racks, thereby realizing the calibration of the current position of the bidirectional transfer vehicle 2.

[0050] The touch control screen 18 adopts an industrial-grade HIM touch screen, and the programmable controller 17 adopts a Siemens SMART programmable controller 17.

[0051] The distance between any two RFID cards 15 is not less than 1 meter.

[0052] The distance between different RFID cards 15 should be at least 1 meter to prevent misreading.

[0053] Two speed change zones 19 are provided in the portion of the moving track 1 corresponding to the space between two adjacent RFID cards 15 in the plug-in zone 3 and the nozzle zone 8 4 .

[0054] A travel switch is installed on the two-way transfer vehicle 2.

[0055] Since the reciprocating movement of the rotary encoder 12 will accumulate errors, a positioning limit switch is set at the docking point of the station guide rail. When the trolley runs to the limit switch, the programmable controller 17 verifies the number of pulses of the rotary encoder 12 according to the feedback address of the limit switch and the RFID card 15 and retransmits the current number of pulses of the rotary encoder 12 according to the absolute address of the landmark to eliminate the error.

[0056] The addresses of the nozzles 8 and the racks corresponding to the RFID card 15 are input into the programmable controller 17, and the programmable controller 17 assigns the address of each rack and sets its station number to 1-8 respectively. When the bidirectional transfer vehicle 2 runs to a certain rack, the RFID card 15 and the RFID card reader 14 are sensed, and the corresponding internal address of the programmable controller 17 is displayed as the current address of the bidirectional transfer vehicle 2. The touch screen realizes the one-key in-place function control of the bidirectional transfer vehicle 2, and the corresponding button is set to the target address of the bidirectional transfer vehicle 2. The target address setting address number is 1-8. When the operator clicks the button corresponding to the target nozzle 8 or rack, the programmable controller 17 receives the button feedback target address. When the target address number is greater than the rack number, the bidirectional transfer vehicle 2 moves forward. When the target address number is less than the rack number, the bidirectional transfer vehicle 2 runs in reverse. When the bidirectional transfer vehicle 2 runs to the target setting point, the address number of the bidirectional transfer vehicle 2 is equal to the rack number, and the system stops running, realizing the one-key in-place control function of the bidirectional transfer vehicle 2.

[0057] In order to improve the running rhythm, the bidirectional transfer vehicle 2 is set to run at a variable speed, and acceleration and deceleration areas are set on the left and right sides of the RFID card 15. The critical points of the areas are fed back by the rotary encoder 12. After the bidirectional transfer vehicle 2 is started, it is controlled by the digital speed regulator 13 to move at high speed. When entering the area near the target point, the bidirectional transfer vehicle 2 switches to deceleration operation. The programmable controller 17 constructs an algorithm to make the speed of the bidirectional transfer vehicle 2 inversely proportional to the distance from the target point, ensuring that the bidirectional transfer vehicle 2 can adjust the running speed to 0 at the target point, thereby achieving precise positioning of the bidirectional transfer vehicle 2 while ensuring the system running rhythm.

[0058] The utility model is controlled by a touch control screen 18, and the position sensing of the two-way transfer vehicle 2 and the storage rack is realized through the induction cooperation of the RFID card reader 14 and the RFID card 15, thereby realizing the signal transmission of the speed and rotation direction, and using the programmable controller 17 to control the digital speed regulator 13 and the rotary encoder 12 to adjust the speed and rotation direction of the drive motor 11, thereby realizing the precise positioning and replacement of the wind tunnel nozzle 8.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. Wind tunnel nozzle replacement device, characterized by: It includes a moving track, on which a bidirectional transfer vehicle is installed, and on both sides of the moving track are provided a plug-in area and a nozzle area symmetrical with the moving center line F of the moving track as the symmetry axis, and the plug-in area is provided with a plurality of first standby storage racks in a linear array along the moving direction of the track, and plug-ins are placed on the first standby storage racks, and the nozzle area is provided with a plurality of second standby storage racks corresponding to the positions of the first standby storage racks, and nozzles are placed on the second standby storage racks, and on both sides of the moving track are also provided a first experimental storage rack and a second experimental storage rack symmetrical with the moving center line F of the moving track as the symmetry axis; A driving motor is fixedly installed on the bidirectional transfer vehicle, and a rotary encoder and a digital speed regulator are electrically connected to the driving motor. An RFID card reader is also installed on the bidirectional transfer vehicle. The first standby storage rack, the second standby storage rack, the first experimental storage rack and the second experimental storage rack are all fixedly installed on one side close to the bidirectional transfer vehicle with RFID cards arranged in sequence and inductively cooperated with the RFID card reader. The digital speed regulator is wirelessly connected to the control cabinet, and the digital speed regulator and the rotary encoder are electrically connected.

2. The wind tunnel nozzle replacement device according to claim 1, characterized in that: A programmable controller is fixedly installed inside the control cabinet. The programmable controller is wirelessly connected to the digital speed regulator. A touch control screen is provided on the programmable controller.

3. The wind tunnel nozzle replacement device according to claim 2, characterized in that: The distance between any two RFID cards is not less than 1 meter.

4. The wind tunnel nozzle replacement device according to claim 3, characterized in that: The movable track portion corresponding to the two adjacent RFID cards in the plug-in area and the nozzle area is provided with two speed change areas.

5. The wind tunnel nozzle replacement device according to claim 4, characterized in that: A travel switch is installed on the bidirectional transfer vehicle.

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