KR20070019469A - Sun roof noise automatical measurement device of vehicle - Google Patents

Abstract

The present invention relates to an automatic measurement device of a sunroof noise of a vehicle for easily performing an optimization process by variously analyzing a correlation between a sunroof wind sound and a deflector regardless of a vehicle type. Initializes the position range and angle range of the microphone and deflector installed in the vehicle, receives the information from the control software and control software that stores this position data, moves the deflector to the initial position and angle, and acquires measurement data from the microphone. Includes control hardware to store.

Vehicle, sunroof, noise, instrumentation

Description

SUN ROOF NOISE AUTOMATICAL MEASUREMENT DEVICE OF VEHICLE}

1 is a diagram showing the configuration of a sunroof automatic measurement device of a vehicle.

2 is a view showing the configuration of the mechanism of the sunroof automatic measurement device of a vehicle according to an embodiment of the present invention.

3 and 4 illustrate a rear view and a right side view of the mechanism shown in FIG. 1.

5 and 6 are views showing the adjustment portion when the angle fine adjustment for the three axes.

7 is a diagram illustrating an overall connection diagram of a control hardware system used in the sunroof automatic measurement device of a vehicle according to an embodiment of the present invention.

※ Explanation of code for main part of drawing

100; Mechanism part 110; microphone

120; Control software 130; Control hardware

The present invention relates to a sunroof automatic measurement device of a vehicle.

Recently, with increasing interest in vehicle noise, much effort has been made to reduce wind noise generated in sunroof vehicles.

In addition, as the size of the sunroof opening increases, the resonance noise generated when the sunroof is opened becomes more serious, and a deflector is installed in front of the sunroof to solve this problem.

The purpose of the deflector is not only to reduce the common noise, but also to prevent excessive inflow of wind through the change of the flow direction, and to reduce the turbulent noise behind the sunroof opening.

Generally, noise reduction is easy when the size of the sunroof opening is small, but as the size of the sunroof is increased in recent years, such as in large sedans or sport utility vehicles (SUVs), the amount of protrusion of the deflector must be increased to reduce the joint noise, and thus the Turbulent noise generated acts as a new noise source.

As such, the various design factors of the deflector (the top of the loop, the gap with the loop, the angle of the deflector, etc.) affect the common noise and turbulent noise in opposite directions, so proper optimization is essential to control both noise sources. .

This tuning process takes a lot of time to consider the range of several geometric design factors, and it also takes a lot of time to analyze the data.

The application method of the prior art is to install a deflector while changing the deflector mounting jig (mounting holes such as styrofoam for freeing the angle, protrusion amount, gap, etc., usually one jig for each discontinuous and special case) and the noise measuring device. After acquiring the data by using the, and then analyzing the data using the noise measurement data analysis device.

When using the above method, there are conventional problems as follows.

(1) excessive measurement time; The jig only reflects non-continuous variable values, and the user needs to make adjustments by hand one by one, and the measurement time is excessively consumed by repetitive work.

(2) discontinuity of measurement data; Because the measurement data are discontinuous, even if optimal conditions occur at the intermediate values, they can be missed and unexpected problems can occur.

(3) excessive analysis time; Due to the absence of the sunroof noise analysis device, the user conducts the analysis on a case-by-case basis, consuming excessive analysis time.

It is an object of the present invention to provide a sunroof automatic measurement device for a vehicle which performs an optimization process easily by variously analyzing the correlation between sunroof wind noise and deflector regardless of the vehicle type.

In order to achieve the above object, the present invention is a sunroof automatic measurement device of the vehicle, the vehicle unit is mounted in the vehicle to mount the deflector, the microphone is installed in the vehicle, the position range and angle range of the deflector is initialized, Control software for storing the position data, the control software for receiving information from the control software to move the deflector to the initial position and angle, and obtains and stores the measurement data from the microphone.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. While many specific details, such as the following description and the annexed drawings, are shown to provide a more general understanding of the invention, these specific details are illustrated for the purpose of explanation of the invention and are not meant to limit the invention thereto. And a detailed description of known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

1 is a diagram showing the configuration of a sunroof automatic measurement device of a vehicle.

2 shows the overall shape of the mechanism part 100 mounted in the vehicle to mount and adjust the deflector.

3 and 4 show the rear and right side views of the mechanism 100, respectively.

5 and 6 are views showing the adjustment portion when the angle fine adjustment for the three axes.

7 is a view showing the overall connection of the control hardware 130 system used in the sunroof automatic measurement device of a vehicle according to an embodiment of the present invention.

With reference to the drawings described above will be described the configuration of the sunroof automatic measurement device for a vehicle according to an embodiment of the present invention.

Embodiments of the present invention include instrument 100, microphone 110, control software 120, and control hardware 130.

The mechanism part 100 is mounted in a vehicle and functions to mount a deflector.

The mechanism part 100 includes an adjusting part for adjusting a mounting state of the mechanism part 100, a deflector mounting part for mounting a deflector, and a deflector moving part for connecting the control part and the deflector mounting part.

As shown in FIGS. 5 and 6, the adjusting unit includes a base having a multilayer structure for fine angle adjustment, and is disposed to be spaced apart from the first base 202 and the first base 202 mounted on the vehicle. It comprises the 2 base 204, the roll angle adjustment screw 206, and the pitch angle adjustment screw 208.

Referring to FIG. 5, the roll angle adjusting screw 206 is mounted between the first base 202 and the second base 204 to maintain a vertical distance from the left and right frames of the deflector.

Referring to FIG. 6, the pitch angle adjusting screw 208 is mounted between the first base 202 and the second base 204 to maintain a horizontal trajectory during the deflector forward and backward movement.

An arc slot 209 is formed in the first base 202 to maintain a horizontal distance from the left and right frames of the deflector.

The first base 202 and the second base 204 are formed in a square plate shape.

In this configuration, the roll angle adjusting screw 206 and the pitch angle adjusting screw 208 are mounted so as to be located in mutually diagonal directions as shown in FIG. 2.

The first base 202 can be attached to the vehicle by using a seat fixing nut hole at the passenger seat position of the vehicle, and it is preferable to attach the first base 202 to the lower frame portion of the passenger seat of the vehicle.

The deflector mounting part includes a linear motion rail 210 extending in the longitudinal direction, a first deflector gripper 220 mounted on one side of the linear motion rail 210, and a first deflector gripper 220 on the other side of the linear motion rail 210. And a second deflector gripper 230 mounted at a position corresponding to the second deflector gripper 230.

The deflector is formed as a tubular deflector and has a hollow elliptical cross section and extends in the longitudinal direction.

The deflector secures the inside of the tube with a spring.

The first deflector gripper 220 is mounted to the linear motion rail 210 to generate a rotational force, a deflector rotation part 226 and a drive motor 222 mechanically connected to the drive motor 222. And a belt driving unit 224 mounted between the deflector rotating unit 226 and transmitting the rotational force of the driving motor 222 to the deflector rotating unit 226.

The first and second deflector grippers 220 and 230 fix both ends of the deflector to the deflector rotation part 226.

The first and second deflector grippers 220 and 230 fix two contacts in the long axis direction of the inner surface of the elliptical tube cross section.

The first and second deflector grippers 220 and 230 are integrally formed to be integrally processed up to a spring when being processed.

The deflector moving unit includes a first linear motion block 240 mounted on one side of the linear motion rail 210, a second linear motion block 242 mounted on a center side of the linear motion rail 210, and a linear motion rail 210. A first linear motion guide 244 or a first linear motion guide 244 orthogonal to the first linear motion guide 244 that is mounted in an up-down direction at a central side of the second connector, and connects the first linear motion guide 244 and the second base 204 to each other; The configuration includes two linear motion guides 246.

The microphone 110 is installed in a vehicle and functions to acquire a corresponding sound source.

The control software 120 initializes the position range and angle range of the deflector and functions to store this position data.

The control software 120 is a system configuration using MAX, and the software required to drive the instrument 100 includes the LabView 7.1 including MAX, the Sound & Vibration Toolkit, and the Motion Control Toolkit. use.

Among these, Measurement & Automation Explorer (MAX) is used to configure other NI boards, including motion controller boards.

In the case of motion controller boards, MAX can be used to control various axes (Stepper, Servo, etc.), limit switches, motion trajectories (velocity, acceleration, deceleration), PID gains, encoder pulses, etc. Parameters can be set, and the 1-D and 2-D interactive functions can be used to manually drive the motor by displaying the movement position on the input window.

The parameters that need to be set in MAX must be configured to suit the nature of the servo motor driver 710 / motor and the application used.

The control hardware 130 receives information from the control software 120 and moves the deflector to the initial position and angle, and acquires and stores measurement data from the microphone 110.

7 is a view showing the overall connection of the control hardware 130 system used in the sunroof automatic measurement device of a vehicle according to an embodiment of the present invention.

The control hardware 130 includes a servo motor driver 710 for controlling the servo motor, a motion controller board 720 and a data acquisition board electrically connected to the servo motor driver 710, and the servo motor driver 710. The interface includes a universal motion interface to connect the motion controller board 720 and the servo motor driver 710.

The motion controller board 720 is configured of a PCI type and is mounted in a PCI slot of a general desktop PC.

The universal motion interface (UMI) used in the embodiment of the present invention is four-axis easy, so there are four terminals in total.

The servo motor driver 710 is provided with a total of four RS232C communication interfaces.

The limit switch mounted on the linear motion guide is connected to the universal motion interface terminal.

The servo motor includes a first servo motor 250 mounted below the first linear motion guide 244 mounted in the vertical direction, and a second servo motor 252 mounted on one side of the second linear motion guide 246. Configure.

A limit switch is mounted on the side of the second linear motion guide 246, and an encoder is attached to the servo motor.

The function of the sunroof automatic measurement device of a vehicle according to an embodiment of the present invention will be described.

A. Vehicle Mounting Method

The mechanism part 100 should be firmly attached to the vehicle using the seat fixing nut hole of the passenger seat position of the vehicle.

In the vehicle seat, the frame under the seat is attached to the floor by bolts at four points, and the arrangement of the seat holes varies according to the vehicle type, and the height, the front and rear distances, and the bolt entry angle are not regular.

Since the mechanism 100 according to the embodiment of the present invention aims to be usable regardless of the vehicle type, a method of designing a table bottom to fit a specific floor of irregular shape should be avoided.

To this end, the passenger seat seat lower frame portion of each test vehicle may be used instead of directly fastening to the floor nut.

The use of the seat bottom frame allows the use of rails, which is advantageous in that additional strokes can be obtained in the front-rear direction in the posture adjustment of the mechanism 100 described below.

B. Fine Adjustment of Posture of Instrument 100

After the mechanism 100 is fastened to the vehicle passenger seat, the posture fine adjustment of the mechanism 100 is required.

The first factor in the attitude mismatch between the mechanism 100 and the vehicle is with respect to the angle.

For roll and pitch angles, a relatively fine adjustment is possible with a 1mm lead and a maximum stroke of 10mm or more is sufficient for fine adjustment.

5 and 6 show adjustment regions in the angle fine adjustment for the three axes.

The base is configured in a multilayer structure as shown in FIGS. 5 and 6 for the angle fine adjustment.

This multilayer structure has the disadvantage of being weighted compared to the single layer structure, but has the following advantages.

First, it is not necessary to consider the posture of the mechanism 100 when fastening the bottom surface of the table with the floor, and fine posture adjustment is not necessary at the bottom of the mechanism 100.

Second, roll, pitch, and yaw angle can be adjusted independently, making it easy to adjust posture.

C. Deflector Attachment and Mechanism 100 Position Adjustment

The type of deflector used in the embodiment of the present invention is a tubular deflector, and first and second deflector grippers 220 and 230 for mounting to the mechanism part 100 are required.

The first and second deflector grippers 220 and 230 serve to fix both ends of the deflector having a hollow elliptical cross section to the deflector rotating part 226 of the mechanism part 100.

The deflector according to the embodiment of the present invention fixes the inside of the tube by using the restoring elasticity of the spring of the deflector, and the first and second deflector grippers 220 and 230 have two contacts in the long axis direction of the inner surface of the elliptical tube section. Fix it.

The first and second deflector grippers (220, 230) is not a type of assembling the spring, but is formed in one piece to be integrally processed to the spring when processing, and was manufactured by using aluminum material, and then made of steel and later Process method of heat treatment is preferred for smooth operation.

The first and second deflector grippers 220 and 230 may be connected to a spring to adapt to the longitudinal curvature of the deflector and to absorb the axial deflection during deflector rotation.

Mechanism 100 according to an embodiment of the present invention can be designed so that the deflector length can be mounted up to 760mm.

Both ends of the test deflector may be fixed by the first and second deflector grippers 220 and 230 by changing the position of the first linear motion block 240.

After fixing the deflector, the center of the deflector should be aligned with the center of the test vehicle.

The deflector may be moved in the y-axis direction of FIG. 2 using the second linear motion block 242 to coincide with the center.

After fixing the deflector to the mechanism part 100, position adjustment of the front-back direction (x-axis direction in FIG. 2) is required.

This is because the front and rear direction (x-axis direction) offsets of the passenger seat seat and the sunroof opening are different depending on the vehicle model.

Although the second linear motion guide 246 in the x-axis direction of the mechanical part 100 may be used, the stroke of the second linear motion guide 246 is about 200 mm, whereas the front and rear offsets may vary depending on the vehicle type. This is because the test position of the deflector may be out of the working area of the mechanical part 100 in the current state because the range is larger.

The linear slots on the seat rail and the aluminum table allow the x-axis positioning to be adjusted relative to the sunroof opening.

A method of driving the instrument unit 100 using the control software 120 (LabView 7.1) will be described.

After the assembly of the mechanical part 100, before the driving test using the control software 120, the motor driving test is manually performed at a low speed of about 30 rpm using the aforementioned 1-D interactive function.

In MAX, the position of the motor is entered as the number of pulses, and 36,000 pulses correspond to one rotation of the motor.

Since the lead of the linear motion guide is 10mm, it moves 10mm at 36,000 pulses.

The servo motor tested is the first servo motor 250 attached to the bottom of the second linear motion guide 246 mounted in the vertical direction in FIG. 2.

The load added to the first servo motor 250 is about 13 kg, and the servo motor operates according to the input pulse.

The position monitoring window of 1-D Interactive shows that the position error is less than 10 pulses, less than 0.1 for rotation angle and less than 3m for position.

After successfully performing the manual operation, a driving test of one axis (first servo motor 250 connected to the first linear motion guide 244) is performed using the control software 120 motion control example program.

First, the second servo motor 252 tests whether the limit switch attached to the side of the second linear motion guide 246 goes well.

An encoder is attached to the second servo motor 252. The encoder signal does not know the absolute position of the current linear motion block, but only the position relative to the position of the linear motion block at the time of power-on.

Since the second servo motor 252 rotates unconditionally by the number of pulses input from the servo motor driver 710, when the position input data is incorrectly input, the linear motion block may try to deviate from the linear motion guide.

In practice, the motor is heavily loaded and can crash at the end of the linear motion guide if the system is stopped or moving on the highway.

As a safety feature, limit switches are usually used for the addition of the stopper function and for absolute positioning in the linear motion guide.

In the Search Type on the front panel, select Forward, Reverse, Home, and Center to check if the linear motion block of the linear motion guide goes to the location.

The forward position is the linear motion block position when the limit switch located closest to the motor is turned on, the reverse position is the limit switch located farthest from the motor, and the home limit switch is located in the middle. Sensor.

In each case, the servo motors operate as instructed and all can be found successfully.

In case of Center, it finds Forward and Reverse and remembers the position corresponding to each position (indicated by the number of pulses) and based on this, Forward and Reverse photo sensor The linear motion block can be moved to the intermediate position of.

In MAX, the servo motor is set to rotate once when receiving 36,000 pulses. For the purpose of testing, the servo motor rotates at a low speed of 30 rpm to prevent safety accidents.

As the servo motor rotates, the position of the moving linear motion block is updated in real-time in the front panel position window.

The test method using the automatic sunroof of the vehicle according to an embodiment of the present invention is as follows.

(1) The mechanism part 100 is mounted in a vehicle, and the deflector is mounted between the first and second deflector grippers 220 and 230 of the mechanism part 100, and then wires are connected.

(2) Install the microphone 110 and connect it to the control hardware 130.

(3) The user specifies the range for the desired deflector position, angle, spacing, etc. in the control software 120.

(4) The user initializes the deflector's position range (x, y, z-axis movement range) and angular range by using the control software 120 to move the deflector moving unit, and stores the position data.

(5) The user activates the start measurement button in the control software 120.

(6) The control hardware 130 receives the information from the control software 120 and moves the deflector to the initial position and angle.

(7) The measurement data is obtained and stored through the control hardware 130 from the microphone 110 installed in the vehicle.

(8) The control software 120 sends information of the next predetermined condition to the control hardware 130 to move the deflector to the next position and angle.

(9) The above steps (7) to (8) are automatically repeated until the measurement of all conditions is completed.

As described above, the apparatus for automatically measuring sunroof noise of a vehicle according to the present invention has the effect of automatically measuring the sunroof wind noise of the vehicle to determine an optimum angle and position.

Claims (25)

In the sunroof automatic measurement device of a vehicle, A mechanism unit mounted in the vehicle to mount the deflector; A microphone installed in the vehicle; Control software for initializing a position range and an angular range of the deflector and storing the position data; And a control hardware which receives information from the control software and moves the deflector to an initial position and angle, and acquires and stores measurement data from the microphone. The method of claim 1, The mechanism part Control unit for adjusting the mounting state of the mechanism; Deflector mounting portion for mounting the deflector; Automatic sunroof of the vehicle comprising a deflector moving unit for connecting the control unit and the deflector mounting portion. The method of claim 2, The control unit is a sunroof automatic measurement device of the vehicle constituting the base in a multi-layer structure for fine angle adjustment. The method of claim 3, The control unit A first base mounted to the vehicle; A second base spaced apart from the first base; A roll angle adjusting screw mounted between the first base and the second base to maintain a vertical gap with the left and right frames of the deflector; And a pitch angle adjusting screw mounted between the first base and the second base to maintain a horizontal trajectory during the deflector forward and backward movement. The method of claim 4, wherein The sunroof noise measuring apparatus of the vehicle which forms an arc slot which maintains a horizontal gap with the deflector left and right frames in the said 1st base. The method of claim 5, And the first base and the second base are formed in a rectangular plate shape. The method of claim 6, The roll angle adjustment screw and the pitch angle adjustment screw is a sunroof automatic measurement device of a vehicle which is located in a diagonal direction. The method of claim 4, wherein And the first base is attached to the vehicle using the seat fixing nut hole at the passenger seat position of the vehicle. The method of claim 8, The first base is a sunroof automatic measurement device for a vehicle mounted on the passenger seat seat lower frame portion of the vehicle. The method of claim 2, The deflector mounting portion A linear motion rail extending longitudinally; A first deflector gripper mounted on one side of the linear motion rail; And a second deflector gripper mounted at a position corresponding to the first deflector gripper on the other side of the linear motion rail. The method of claim 10, The deflector is a sunroof of the vehicle automatic measurement device formed of a tubular deflector. The method of claim 11, The deflector has a hollow oval cross-section and the sunroof noise automatic measuring device of the vehicle extending in the longitudinal direction. The method of claim 12, The deflector is a sunroof automatic measurement device of a vehicle for fixing the inside of the tube with a spring. The method of claim 13, The first deflector gripper A drive motor mounted to the linear motion rail to generate rotational force; A deflector rotating part mechanically connected to the driving motor; And a belt driving unit mounted between the driving motor and the deflector rotating unit to transmit rotational force of the driving motor to the deflector rotating unit. The method of claim 14, And a first deflector gripper and a second deflector gripper to fix two contact points in the long axis direction of the inner surface of the deflector. The method of claim 15, The deflector gripper is a sunroof noise automatic measuring device of a vehicle which is formed integrally including a spring. The method of claim 10, The deflector moving unit A first linear motion block mounted on one side of the linear motion rail; A second linear motion block mounted to the center side of the linear motion rail; A first linear motion guide mounted in a vertical direction at the center of the linear motion rail; And a second linear motion guide orthogonal to the first linear motion guide, the second linear motion guide connecting the first linear motion guide and the second base. The method of claim 1, The control hardware A servo motor driver for controlling the servo motor; A motion controller board and a data acquisition board electrically connected to the servo motor driver; The servo motor driver's interface has a universal motion interface (Universal Motion Interface) to connect the motion controller board and the servo motor driver of the vehicle sunroof noise automatic measurement device. The method of claim 18, The motion controller board is a sunroof noise automatic measurement device of a vehicle configured of a PCI type. The method of claim 18, The universal motion interface is a sunroof automatic measurement device of a vehicle configured for four axes. The method of claim 18, The servo motor driver is a sunroof automatic measurement device of a vehicle having an RS232C communication interface. The method of claim 20, The sunroof noise measuring apparatus of a vehicle to which the limit switch mounted to the linear motion guide is connected to the universal motion interface terminal. The method of claim 18, The servo motor may include a first servo motor mounted below a first linear motion guide mounted in a vertical direction; An apparatus for automatically measuring sunroof noise of a vehicle including a second servo motor mounted to one side of the second linear motion guide. The method of claim 23, wherein A sunroof automatic measurement device for a vehicle equipped with a limit switch on the side of the second linear motion guide. The method of claim 23, wherein The sunroof noise measuring apparatus of a vehicle having an encoder attached to the servo motor.

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