Automatic lifting rain spraying system for automobile environment wind tunnel

Abstract

The utility model relates to the technical field of automobile wind tunnel test systems, in particular to an automobile environment wind tunnel automatic lifting rain spraying system which comprises a frame, a spraying pipe unit, a lifting driving unit and a lifting control unit. The two ends of the spray pipe unit are connected with the left side beam and the right side beam through the lifting driving unit correspondingly, the lifting driving unit is in communication connection with the lifting control unit, and the lifting control unit is used for controlling the lifting driving unit to linearly move in the axial direction of the side beams. The system can meet the requirement for real-time high-precision stable adjustment of the height of the spray head.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile wind tunnel test systems, in particular to an automatic lifting and rain spraying system for an automobile environmental wind tunnel. Background Art

[0002] Water management test refers to the study and control of water flow or hydraulic behavior in wind tunnel experiments. It is a common type of automotive environmental wind tunnel test. Through this type of test, the windshield wiper, wheel water rolling and other test calibrations in the process of automobile development can be completed. During the test, the height and angle of the nozzle need to be set multiple times according to the test requirements of the water jet.

[0003] The existing wind tunnel water management test mainly uses a push-type rain rack, which is combined with a manual method to adjust the nozzle height. This method is relatively simple, but has many inconveniences:

[0004] 1. Real-time adjustment cannot be performed during the test. The test needs to be paused first and the locking mechanism of the nozzle needs to be manually adjusted to change the height. This cannot meet the demand for real-time adjustment of the nozzle height in the test conditions, and the degree of intelligence and automation is also low;

[0005] 2. The adjustment process often requires a lot of manpower and time, and the height is only controlled by tape measures and visual inspection, so accuracy is difficult to guarantee. Utility Model Content

[0006] The utility model provides an automatic lifting rain spraying system for an automobile environmental wind tunnel, which can meet the demand for real-time high-precision and stable adjustment of the height of the spray head.

[0007] This application provides the following technical solutions:

[0008] An automatic lifting rain spraying system for an automobile environmental wind tunnel comprises a frame, a nozzle unit, a lifting drive unit and a lifting control unit. The frame comprises a top beam, a bottom beam, a left beam and a right beam. Both ends of the nozzle unit are respectively connected to the left beam and the right beam through the lifting drive unit. The lifting drive unit is in communication connection with the lifting control unit. The lifting control unit is used to control the lifting drive unit to move linearly along the axial direction of the side beam.

[0009] Technical principle: The whole system includes a frame, a nozzle unit, a lifting control unit and a lifting drive unit. Both ends of the nozzle unit are fixed on the lifting drive unit. The height adjustment of the nozzle unit can be automatically completed by remotely adjusting the position of the lifting drive unit through the lifting control unit.

[0010] Beneficial effect: There is no need to manually adjust the locking device, which can be done in real time during the test, saving adjustment time and reducing the workload of test personnel.

[0011] Furthermore, the nozzle unit comprises a plurality of nozzles, and a plurality of nozzles are evenly arranged on each nozzle.

[0012] Beneficial effect: The number and position of nozzles can achieve more accurate water jet simulation effect.

[0013] Furthermore, the lifting drive unit includes a gear slide and a nozzle fixing base, the gear slide is arranged on the left beam and the right beam, the nozzle fixing base is arranged on both sides of the nozzle unit for fixing the nozzle unit, the nozzle fixing base includes a main control board, a servo motor and a rack, the main control board is communicatively connected with the lifting control unit, and the servo motor drives the rack to engage with the gear slide.

[0014] Beneficial effects: The lifting drive unit includes a gear slide rail set on the side beam and a nozzle fixed base connected to the nozzle unit, wherein the nozzle fixed base is provided with a controller, a Wifi communication module, a servo motor and a rack, and the rack driven by the servo motor is meshed with the gear slide rail on the side beam, which can convert the rotational motion of the servo motor into a linear motion of the nozzle fixed base along the axial direction of the side beam, thereby realizing the lifting and lowering of the lifting drive unit. Through the Wifi module, the servo motor works according to the instructions of the lifting control unit, realizing real-time and precise control of the nozzle height, and the adjustment action is soft, which can fully ensure the stability of the nozzle unit.

[0015] Furthermore, the nozzle fixing base is provided with an optical sensor for detecting the height of the nozzle from the ground.

[0016] Beneficial effects: The optical sensor is calibrated before the test and can provide real-time feedback of height data during the test, avoiding the time-consuming and accuracy problems caused by manual measurement.

[0017] Furthermore, rotating beams are provided at the upper and lower parts of the left beam, the other end of the rotating beam is connected to a rotating shaft column fixed to the side wall of the wind tunnel through a rotating shaft, and universal wheels are provided at the bottom of the left beam and the right beam.

[0018] Beneficial effect: The cooperation of the rotating beam and the universal wheel can make it convenient to store the frame on the side of the wind tunnel after the test is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of an automatic lifting and spraying rain system for an automobile environmental wind tunnel according to the utility model;

[0020] Figure 2 The utility model is a structural diagram of a lifting drive unit of an automatic lifting rain spraying system of an automobile environmental wind tunnel. DETAILED DESCRIPTION

[0021] The following is further described in detail through specific implementation methods:

[0022] The marks in the drawings of the specification include: water inlet hose 1, water inlet valve 2, water inlet hard pipe bracket 3, nozzle valve 4, rotating shaft column 5, rotating shaft 6, rotating beam 7, frame 8, nozzle 9, sliding guide rail 10, nozzle 11, universal wheel 12, nozzle connecting hose 13, slide groove 14, gear slide rail 15, servo motor 16, nozzle fixing base 17, optical sensor 18.

[0023] Embodiment 1

[0024] like Figure 1 As shown, an automatic lifting and spraying system for an automobile environmental wind tunnel comprises a frame, a nozzle unit, a lifting drive unit and a lifting control unit, wherein:

[0025] The frame 8 includes a top beam, a bottom beam, a left beam and a right beam. Two upper and lower rotating beams 7 are arranged on the side of the left beam. The other end of the rotating beam 7 is connected to the rotating shaft column 5 fixed to the side wall of the wind tunnel through the rotating shaft 6. Universal wheels 12 are arranged at the bottom of the left beam and the right beam. When not testing, the frame can be easily pushed to the side wall of the wind tunnel and placed parallel to the side wall of the wind tunnel, reducing the occupied site area.

[0026] The nozzle unit includes a plurality of horizontally arranged nozzles 9, one end of each nozzle is connected to a nozzle valve 4, a plurality of nozzles 11 are evenly arranged on the nozzle 9, one end of the nozzle 9 is connected to the water inlet hard pipe bracket 3 through a nozzle connecting hose 13, a nozzle valve 4 is arranged between the nozzle 9 and the nozzle connecting hose 13, one end of the water inlet hose 1 is connected to the water inlet hard pipe bracket 3, and the other end of the water inlet hose 1 is connected to a water pump through a water inlet valve 2 to generate the water pressure required by the test. Both ends of the nozzle unit are connected to the left beam and the right beam through a lifting drive unit.

[0027] The lifting drive unit is arranged on both sides of the nozzle 9 to adjust the height of the nozzle 9 from the ground. Figure 2As shown, it includes a sliding guide rail 10 arranged on the left beam and the right beam and a nozzle fixing base 17 connected to the nozzle unit. Among them, the sliding guide rail 10 is in the form of a groove, and two slide grooves 14 are arranged in the part near the edge of the groove, and a gear slide rail 15 is arranged inside the slide groove. The nozzle fixing base 17 is in a Π shape, including vertical surfaces on both sides and a horizontal surface on the top, and the vertical surfaces on both sides are respectively placed in the slide groove 14. The horizontal surface on the top is provided with a main control board, a servo motor 16 and an optical sensor 18. The main control board includes a controller, a Wifi module and a motor drive module. The controller is connected with the Wifi module, the motor drive module and the optical sensor, and can be implemented by a single-chip microcomputer or a PLC. A single-chip microcomputer is used in this embodiment. The controller receives the command of the lifting control unit through the Wifi module and sends it to the motor drive module to complete the precise setting of the rotation amount of the servo motor 16. The servo motor 16 drives the rack after the reducer, and the rack meshes with the gear slide rail 15 on the side beam, converting the rotation of the servo motor into a linear movement along the axial direction of the side beam, driving the nozzle fixed base to make precise displacement in the vertical direction. The nozzle 9 is fixed to the horizontal plane of the nozzle fixed base 17 by a U-shaped buckle, and the U-shaped buckle is connected to the nozzle fixed base by bolts to achieve synchronous lifting with the nozzle fixed base 17. The lifting control unit sends the same lifting control instructions to the lifting drive units at both ends of each nozzle to ensure that the lifting heights of the bases at both ends of the nozzle are completely consistent. The optical sensor 18 reports the height data in real time during the test. The optical sensor in this embodiment uses a laser radar ranging module, which can directly measure the height of the nozzle fixed base from the ground and send the height data to the controller through the Wifi module. The entire adjustment process does not require manual participation, and is real-time and fast. The accurately calibrated light sensor can ensure the accuracy of the height adjustment.

[0028] The lifting control unit is used to receive the height setting information input by the test personnel, convert it into the working control parameters of the servo motor and send it to the controller of the upgrade drive unit. At the same time, it receives the data of the optical sensor to check the nozzle height. If there is an error, the position of the corresponding nozzle fixing base is accurately adjusted.

[0029] When in use, first push the frame to the predetermined position of the wind tunnel exit to complete the height calibration of the optical sensor, then the experimenter issues a height setting instruction, the lifting control unit completes the setting of the servo motor working parameters, and sends it to the upgraded drive unit via wifi. The servo motor works according to the control instruction, the light sensor reports the collected data, the lifting control unit receives the data and checks whether the height setting is completed. If there is an error, it will be precisely adjusted again. During the experiment, the height control instruction can be issued in real time to adjust the nozzle height. After the test is completed, push the frame back to the storage position on the side of the wind tunnel.

[0030] The above is only an embodiment of the utility model. The utility model is not limited to the field involved in this implementation case. The common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An automatic lifting and spraying rain system for an automobile environmental wind tunnel, characterized in that: It includes a frame, a nozzle unit, a lifting drive unit and a lifting control unit, wherein the frame includes a top beam, a bottom beam, a left beam and a right beam, two ends of the nozzle unit are respectively connected to the left beam and the right beam through the lifting drive unit, the lifting drive unit is communicatively connected with the lifting control unit, and the lifting control unit is used to control the lifting drive unit to move linearly along the axial direction of the side beam.

2. The automatic lifting and spraying rain system for an automobile environment wind tunnel according to claim 1 is characterized in that: The nozzle unit comprises a plurality of nozzles, and a plurality of nozzles are evenly arranged on each nozzle.

3. The automatic lifting and spraying rain system for automobile environmental wind tunnel according to claim 1 is characterized by: The lifting drive unit includes a gear slide and a nozzle fixing base, the gear slide is arranged on the left beam and the right beam, the nozzle fixing base is arranged on both sides of the nozzle unit, and is used to fix the nozzle unit, the nozzle fixing base includes a main control board, a servo motor and a rack, the main control board is communicatively connected with the lifting control unit, and the servo motor drives the rack to engage with the gear slide.

4. The automatic lifting and spraying rain system for an automobile environment wind tunnel according to claim 3 is characterized by: The nozzle fixing base is provided with an optical sensor for detecting the height of the nozzle from the ground.

5. The automatic lifting and spraying rain system for automobile environmental wind tunnel according to claim 1 is characterized by: The upper and lower parts of the left beam are provided with rotating beams, the other end of the rotating beam is connected with a rotating shaft column fixed on the side wall of the wind tunnel through a rotating shaft, and the bottoms of the left beam and the right beam are provided with universal wheels.

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