Noise evaluation method for glass run

Abstract

A method for evaluating the noise of a glass run can reproduce the vibration phenomenon actually occurring in a car. When a glass run (10) is installed on a vehicle, a door glass vibration waveform (X) formed by the vibration of a door glass (2) detected by a door glass sensor (20) and a frame body vibration waveform (Y) formed by the vibration of a frame body (100) detected by a frame body sensor (30) are synthesized, and only the relative vibration of the door glass (2) relative to the frame body (100) is extracted and stored as a synthesized vibration waveform (Z). When the vehicle is parked, a vibration based on the synthesized vibration waveform (Z) is generated from a vibration exciter (40) disposed on the outside of the vehicle to vibrate the door glass (2), and a microphone (50) disposed on the inside of the vehicle detects the sound caused by the vibration.

Description

Technical Field

[0001] The present invention relates to a noise evaluation method for a glass run which is embedded and installed along a frame provided in a door of a vehicle and guides a door glass which is moved up and down. Background Art

[0002] A glass run is mounted on a frame such as a door window frame or a door frame of a vehicle door to guide the door glass that is raised and lowered.

[0003] Such a glass run channel has the following problem: when the vehicle is traveling on a road with poor road conditions, or even when the vehicle is parked and the door is closed, noise is generated around the glass run channel. This is called "glass run noise" or "glass run noise".

[0004] Regarding noise, the source of generation is not only from the glass run, but also a mixture of various sounds from other than the glass run, so it is extremely difficult to identify the noise that only originates from the glass run.

[0005] The sounds other than those coming from the glass run channel include the creaking of other parts mounted on the door (interior trim, resin cover, etc.), tire noise, engine noise, wind noise, etc. during driving.

[0006] Conventionally, there is a noise detection method and an evaluation device for a steering system of a vehicle, for example, as described in Patent Document 1. However, such a method is not effective as a method for evaluating noise of a glass run channel.

[0007] Prior art literature

[0008] Patent Literature

[0009] Patent document 1: JP Patent No. 6225368. Summary of the invention

[0010] An object of the present invention is to provide a glass run noise evaluation method that can reproduce the vibration phenomenon occurring in an actual automobile.

[0011] In order to achieve the above-mentioned object, the present invention is a method for evaluating the noise of a glass run (10), wherein the glass run (10) is embedded and installed along a frame (100) provided in a vehicle door (1) to guide a door glass (2) being raised and lowered toward a groove (19), and is characterized by:

[0012] The process of detecting the vibration of the door glass (2) using a door glass sensor (20) and storing the vibration as a door glass vibration waveform (X), and detecting the vibration of the frame (100) using a frame sensor (30) and storing the vibration as a frame vibration waveform (Y) when the glass run (10) is installed on the vehicle;

[0013] A step of synthesizing the door glass vibration waveform (X) and the frame vibration waveform (Y), extracting only the relative vibration of the door glass (2) with respect to the frame (100) and storing it as a synthesized vibration waveform (Z);

[0014] A step of causing a vibration based on the synthesized vibration waveform (Z) to be generated from an oscillator (40) disposed outside the vehicle to vibrate the door glass (2) when the vehicle is parked;

[0015] A step of detecting a sound caused by the vibration generated by the exciter (40) based on the synthesized vibration waveform (Z) using a microphone (50) installed inside the vehicle.

[0016] In addition, the present invention is a method for evaluating noise of a glass run (10), wherein the glass run (10) is embedded and installed along a frame (100) provided in a vehicle door (1) to guide a door glass (2) being raised and lowered toward a groove portion (19), and is characterized by comprising:

[0017] The process of detecting the vibration of the door glass (2) using a door glass sensor (20) and storing the vibration as a door glass vibration waveform (X), and detecting the vibration of the frame (100) using a frame sensor (30) and storing the vibration as a frame vibration waveform (Y) when the glass run (10) is installed on the vehicle;

[0018] A step of synthesizing the door glass vibration waveform (X) and the frame vibration waveform (Y), extracting only the relative vibration of the door glass (2) with respect to the frame (100) and storing it as a synthesized vibration waveform (Z);

[0019] The glass run (10) is mounted on a simulated frame (101) corresponding to the frame (100) provided on an experimental bench (200) so that a simulated door glass (102) corresponding to the door glass (2) is guided relative to a groove (19) of the glass run (10), so that a vibration based on the synthesized vibration waveform (Z) is generated from an exciter (40) provided on the surface side of the simulated door glass (102), thereby vibrating the simulated door glass (102);

[0020] A step of detecting sound caused by vibration based on the synthetic vibration waveform (Z) generated from the exciter (40) using a microphone (50) provided on the back side of the simulated door glass (102).

[0021] In addition, the present invention is characterized in that the door glass sensor (20) and the frame sensor (30) detect vibrations generated when the vehicle is driven.

[0022] In addition, the present invention is characterized in that the door glass sensor (20) and the frame sensor (30) detect vibrations generated when the vehicle is parked and the door (1) is changed from an open state to a closed state.

[0023] In addition, the present invention is characterized in that when the door glass sensor (20) and the frame sensor (30) detect the generated vibration, the door glass (2) is placed in a lowered state other than a fully opened state.

[0024] In addition, the present invention is characterized by further comprising a step of visualizing the sound detected by the microphone (50).

[0025] In addition, the present invention is characterized in that, as a step subsequent to the step of vibrating the door glass (2), a waveform correction step is provided.

[0026] The waveform correction process is to generate vibration based on the synthetic vibration waveform (Z) from the exciter (40), extract the synthetic vibration waveform when the door glass (2) is artificially vibrated as a real synthetic vibration waveform (Real Synthesized Oscillatory Wave) (R) through detection by the door glass sensor (20) and the frame sensor (30), compare the real synthetic vibration waveform (R) with the synthetic vibration waveform (Z0), and change the output of the exciter (40) in such a way that the difference between the two becomes less than a certain value (Q) to correct the real synthetic vibration waveform (R),

[0027] The synthesized vibration waveform (Z) in the sound detection step is the true synthesized vibration waveform (R) corrected by the waveform correction step.

[0028] In addition, the present invention is characterized in that, as a step subsequent to the step of vibrating the simulated door glass (102), a waveform correction step is provided.

[0029] The waveform correction process is to generate vibration based on the synthetic vibration waveform (Z) from the exciter (40), extract the synthetic vibration waveform when the simulated door glass (102) is artificially vibrated as a real synthetic vibration waveform (R) through detection by the door glass sensor (20) and the frame sensor (30), compare the real synthetic vibration waveform (R) with the synthetic vibration waveform (Z0), and change the output of the exciter (40) in such a way that the difference between the two becomes less than a certain value (Q) to correct the real synthetic vibration waveform (R).

[0030] The synthesized vibration waveform (Z) in the sound detection step is the true synthesized vibration waveform (R) corrected by the waveform correction step.

[0031] In addition, the reference numerals in parentheses indicate corresponding elements or corresponding matters described in the drawings and the detailed description to be described later.

[0032] According to the present invention, when the glass run is installed on the vehicle, the door glass vibration waveform of the door glass is detected by the door glass sensor, and the frame vibration waveform of the frame is detected by the frame sensor, these door glass vibration waveforms and the frame vibration waveform are synthesized, and only the relative vibration of the door glass with respect to the frame is extracted as the synthesized vibration waveform, so that the sound generated only by the glass run can be detected.

[0033] Then, the exciter generates vibration based on the synthesized vibration waveform to vibrate the door glass, and the sound at this time is detected by a microphone installed inside the vehicle, thereby reproducing the vibration of the glass run channel and the sound accompanying it that actually occurs in a car.

[0034] Thus, since the test can be performed many times, the vibration of the glass run can be taken into consideration, and a glass run having a more excellent shape and material can be designed.

[0035] Furthermore, according to the present invention, when a glass run is mounted on a simulation frame provided on a test bench so as to guide a simulated door glass relative to a groove portion of the glass run, a vibration based on a synthetic vibration waveform is generated from a vibrator provided on the front surface side of the simulated door glass to vibrate the simulated door glass, and a sound caused by the vibration based on the synthetic vibration waveform generated from the vibrator is detected using a microphone provided on the back surface side of the simulated door glass. Therefore, the vibration of the glass run and the sound accompanying the vibration that would occur in an actual automobile can be reproduced on the test bench.

[0036] Therefore, the design of the glass run can be carried out in a small environment.

[0037] Furthermore, according to the present invention, by detecting vibrations generated when the vehicle is running using the door glass sensor and the frame sensor, it is effective in designing a glass run channel that suppresses vibrations when the vehicle is running, for example, when the vehicle is running on a road with bad road conditions.

[0038] Furthermore, according to the present invention, the door glass sensor and the frame sensor detect vibrations generated when the vehicle is parked and the door is changed from an open state to a closed state, which is effective in designing a glass run channel that suppresses vibrations when the door is closed.

[0039] Furthermore, according to the present invention, when the door glass sensor and the frame sensor detect the generated vibration, the door glass is brought into a lowered state other than fully opened, so that the vibration and the sound accompanying the large vibration of the glass run can be reproduced.

[0040] Furthermore, according to the present invention, since the sound detected by the microphone is visualized, the sound accompanying the vibration of the glass run can be easily grasped.

[0041] In addition, according to the present invention, since a waveform correction process is provided as a subsequent process of the process of vibrating the door glass in an actual automobile, when the real synthetic vibration waveform when the door glass is artificially vibrated by generating a vibration based on the synthetic vibration waveform from the exciter has a difference exceeding a certain value compared with the synthetic vibration waveform, the output of the exciter is changed and controlled so that the real synthetic vibration waveform approaches the synthetic vibration waveform, thereby being able to more accurately reproduce the vibration of the glass run channel and the accompanying sound generated in an actual automobile using an actual automobile.

[0042] That is, when the door glass is artificially vibrated by generating vibrations based on the synthetic vibration waveform from the exciter, the real synthetic vibration waveform should originally be the same as the synthetic vibration waveform. However, for example, along with the vibration of the exciter, the pillar on which the exciter is mounted also vibrates, resulting in vibration attenuation or the vibration changes depending on the actual environment in which the car is placed. Therefore, feedback control is performed to correct this so that the real synthetic vibration waveform is the same as the synthetic vibration waveform.

[0043] In addition, according to the present invention, since a waveform correction process is provided as a subsequent process of the process of vibrating the simulated door glass on a test bench, when the real synthetic vibration waveform when the simulated door glass is artificially vibrated by generating a vibration based on the synthetic vibration waveform from the exciter has a difference exceeding a certain value compared with the synthetic vibration waveform, the output of the exciter is changed and controlled so that the real synthetic vibration waveform approaches the synthetic vibration waveform, thereby making it possible to more accurately reproduce the vibration of the glass run and the accompanying sound generated in an actual car using the test bench.

[0044] That is, when the exciter generates vibration based on the synthetic vibration waveform to simulate the artificial vibration of the door glass, the real synthetic vibration waveform should originally be the same as the synthetic vibration waveform. However, for example, along with the vibration of the exciter, the pillar on which the exciter is mounted also vibrates, resulting in vibration attenuation or the vibration changes depending on the environment of the test bench. Therefore, feedback control is performed to correct this so that the real synthetic vibration waveform is the same as the synthetic vibration waveform. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 is a side view showing a vehicle.

[0046] Figure 2 It is shown in Figure 1 AA enlarged cross-sectional view of the glass run channel installed in the front door.

[0047] Figure 3 It is shown Figure 1 1 is a side view of the installation positions of the door glass sensor 20 and the frame sensor 30 around the front door.

[0048] Figure 4 This is a partial cross-sectional view showing a state in which a noise evaluation method for a glass run according to an embodiment of the present invention is implemented.

[0049] Figure 5 This is a block diagram showing an electrical configuration for implementing the glass run noise evaluation method according to the embodiment of the present invention.

[0050] Figure 6This is a graph showing the door glass vibration waveform (X) detected by the door glass sensor 20 and the frame body vibration waveform (Y) detected by the frame body sensor 30 in a glass run noise evaluation method according to the embodiment of the present invention.

[0051] Figure 7 It shows that Figure 6 The graph shown is a graph in which a door glass vibration waveform (X) and a frame body vibration waveform (Y) are synthesized and only a synthesized vibration waveform (Z) of the relative vibration of the door glass 2 with respect to the frame body 100 is extracted.

[0052] Figure 8 It will be Figure 4 A diagram showing a visualization of the sound detected by the microphone.

[0053] Fig. 9 This is a block diagram showing an electrical configuration in which a waveform correction unit is added in order to implement the glass run noise evaluation method according to the embodiment of the present invention.

[0054] Fig.10 It is shown Fig. 9 A flowchart of the waveform correction control of the waveform correction unit shown.

[0055] Fig.11 It is shown Fig. 9 Another flow chart of the waveform correction control of the waveform correction section shown.

[0056] Description of Reference Numerals

[0057] 1 Door

[0058] 1A Front door

[0059] 1B Rear door

[0060] 2 Door glass

[0061] 10 Glass runner

[0062] 11 Inner side wall

[0063] 12 Vehicle outer side wall

[0064] 13 Connecting wall

[0065] 14 Inner lip

[0066] 15 Outer lips

[0067] 16 Inner lip

[0068] 17 Outer lip

[0069] 18 Main body

[0070] 19 Groove

[0071] 20 Door glass sensors

[0072] 30 Sensor for frame

[0073] 40 vibrator

[0074] 50 Microphone

[0075] 70 Control device

[0076] 71 Control Department

[0077] 72 Storage

[0078] 73 Output

[0079] 74 Input section

[0080] 75 Waveform synthesis section

[0081] 76 Waveform Correction Unit

[0082] 100 Frame

[0083] 101 Simulation frame

[0084] 102 Simulated car door glass

[0085] X Door glass vibration waveform

[0086] Y frame vibration waveform

[0087] Z Synthesized vibration waveform DETAILED DESCRIPTION

[0088] A method for evaluating noise of a glass run according to an embodiment of the present invention will be described with reference to the drawings.

[0089] Usually, if Figure 1 and Figure 2 As shown, a glass run 10 is fitted and mounted on a frame 100 such as a door sash or door frame of a vehicle door 1 (front door 1A, rear door 1B) to guide a door glass 2 that is moved up and down.

[0090] The glass run channel 10 generally comprises: a main body 18 having a substantially U-shaped cross section, a groove 19 formed on the inner side thereof, and comprising an inner side wall 11, an outer side wall 12, and a connecting wall 13 connecting the two side walls 11 and 12; an inner lip 14 extending from the end of the inner side wall 11 toward the outer side of the vehicle and in sliding contact with the inner side surface of the door glass 2; an outer lip 15 extending from the end of the outer side wall 12 toward the inner side of the vehicle and in sliding contact with the outer side surface of the door glass 2; an inner side lip 16 extending from the end of the inner side wall 11 toward the inner side of the vehicle and used to hold the frame 100; and an outer side lip 17 extending from the end of the outer side wall 12 toward the outer side of the vehicle and used to hold the frame 100.

[0091] As an evaluation system for implementing the glass run noise evaluation method according to the embodiment of the present invention, there is provided Figure 3 As shown in the figure, the door glass sensor 20 is mounted on the door glass 2 to detect vibration, the frame sensor 30 is mounted on the frame 100 to detect vibration, Figure 4 As shown, a vibrator 40 for generating vibration, a microphone 50 for detecting sound, Figure 5 A control device 70 controls the entire system as shown.

[0092] The door glass sensor 20 is attached to the vehicle outer side (or vehicle inner side) of the door glass 2 to detect vibration of the door glass 2 .

[0093] The housing sensor 30 is attached to the vehicle outer side of the housing 100 , and detects vibration of the housing 100 .

[0094] Here, the door glass sensor 20 and the frame sensor 30 are contact sensors mounted on the door glass 2 and the frame 100 , respectively. However, any non-contact sensor may be used as long as it can sense the displacement and waveform of vibration.

[0095] The vibrator 40 is fixed to the outside of the vehicle and includes a main body 41, an arm 42 extending from the main body 41, and a holding portion 43 provided at the front end of the arm 42 and holding the upper end of the door glass 2, and can apply vibration according to a required vibration waveform.

[0096] The structure of the vibrator 40 is not limited to this, and any structure may be used as long as it can apply vibration only to the door glass 2 .

[0097] The microphone 50 is located inside the vehicle and is provided at, for example, the height of the driver's ear to detect sound.

[0098] The control device 70 includes a control unit 71 , a storage unit 72 , an output unit 73 including a display for output, an input unit 74 including a keyboard and a mouse for input, and a waveform synthesizing unit 75 .

[0099] The control unit 71 controls the entire system according to a control program and is composed of a CPU.

[0100] The storage unit 72 includes storage media such as a ROM for storing a control program and the like and a RAM for temporarily storing data.

[0101] The waveform synthesis unit 75 synthesizes the two vibration waveforms sent from the control unit 71. As a synthesis method, a synthesized vibration waveform can be formed by adding two vibration waveforms, or a synthesized vibration waveform can be formed by taking the difference between the two vibration waveforms to represent the difference between one vibration waveform and the other vibration waveform.

[0102] A description will be given of a case where the noise of a glass run is evaluated using the evaluation system configured in this manner.

[0103] In an actual automobile, the noise generated by the glass run channel 10 is generated from the vicinity of the glass run channel 10 when the vehicle stops and the door 1 is changed from an open state to a closed state, and when the vehicle is running on a road with a bad road condition in particular. However, since the noise generated when the door is closed is different from the noise generated when the vehicle is running on a road with a bad road condition, the noise evaluation method when the door is closed will be described first.

[0104] When the door is closed (the vehicle is parked)

[0105] When the vehicle (glass run 10 is assembled on an actual vehicle) is parked, a door glass sensor 20 is mounted on the door glass 2, and a frame sensor 30 is mounted on the frame 100. Although not particularly limited, Figure 3 As shown in the figure, the door glass sensor 20 is installed at the upper center of the door glass 2, and the frame sensor 30 is installed at a position extending upward from the door glass sensor 20 and located at the center of the frame 100. In addition, the door glass sensor 20 and the frame sensor 30 may be installed on the door glass 2 and the frame 100, and other structures may be used. In addition, as described above, non-contact sensors may be used as the door glass sensor 20 and the frame sensor 30.

[0106] At this time, the door glass 2 is in a slightly lowered state. Here, the door glass 2 is located between the fully closed state and the half-open (1 / 2 open) state.

[0107] Then the door 1 is closed from the opened state. In addition, the speed of closing the door 1 is 1.2 m / s.

[0108] The vibration of the door glass 2 generated by the impact when the door 1 is closed is detected by the door glass sensor 20, and the vibration of the frame 100 is detected by the frame sensor 30. The detected information is sent to the control unit 71, and the control unit 71 stores the detected vibration of the door glass 2 as the door glass vibration waveform X in the storage unit 72, and also stores the detected vibration of the frame 100 as the frame vibration waveform Y in the storage unit 72.

[0109] The door glass vibration waveform X and the frame vibration waveform Y are, for example, Figure 6 The waveform shown.

[0110] Next, when the control unit 71 sends the door glass vibration waveform X and the frame body vibration waveform Y to the waveform synthesis unit 75, the waveform synthesis unit 75 synthesizes the door glass vibration waveform X and the frame body vibration waveform Y, and extracts only the relative vibration of the door glass 2 with respect to the frame body 100 as the synthesized vibration waveform Z. More specifically, the value obtained by subtracting the value of the frame body vibration waveform Y from the value of the door glass vibration waveform X is sent to the control unit 71 as the synthesized vibration waveform Z, and the control unit 71 stores the synthesized vibration waveform Z in the storage unit 72.

[0111] Will Figure 6 The synthesized vibration waveform Z obtained by synthesizing the door glass vibration waveform X and the frame vibration waveform Y (subtracting the value of the frame vibration waveform Y from the value of the door glass vibration waveform X) is Figure 7 The waveform shown.

[0112] Thus, when the door 1 is closed, various sounds are mixed in addition to the sound of the glass run 10 due to its vibration. However, by extracting only the relative vibration of the door glass 2 with respect to the frame 100 , only the sound generated by the glass run 10 can be detected.

[0113] Then, the control unit 71 reads the synthesized vibration waveform Z stored in the storage unit 72, as shown in FIG. Figure 4 As shown, vibration based on the composite vibration waveform Z is generated from the vibrator 40 provided on the vehicle outer side, and the door glass 2 is vibrated.

[0114] The sound at this time is detected by the microphone 50 installed inside the vehicle and visualized. The visualization is expressed by visualization based on coloring, or as Figure 8 As shown, the image is expressed by visualization based on shades and is displayed on the output unit 73 using a display. Figure 8 In the configuration shown, it is possible to confirm periodic sounds separated with respect to time.

[0115] In this way, by reading and using the synthetic vibration waveform Z stored in the storage unit 72 , the vibration of the glass run 10 and the sound accompanying the vibration generated when the door of an actual vehicle is closed can be reproduced, and thus the test can be performed many times.

[0116] Thus, the glass run 10 having a more excellent shape and material can be designed in consideration of the vibration of the glass run 10 when the door is closed.

[0117] When driving on a road with poor conditions

[0118] Same as the above-mentioned situation when the door is closed (vehicle parking state), Figure 3 As shown, the actual vehicle is driven with the door glass 2 slightly lowered, the door glass sensor 20 mounted on the door glass 2, and the frame sensor 30 mounted on the frame 100. In addition, as described above, non-contact sensors may be used as the door glass sensor 20 and the frame sensor 30.

[0119] The vibration of the door glass 2 generated by the impact during driving is detected by the door glass sensor 20, and the vibration of the frame 100 is detected by the frame sensor 30. The detected information is sent to the control unit 71, and the control unit 71 stores the detected vibration of the door glass 2 as the door glass vibration waveform X in the storage unit 72, and also stores the detected vibration of the frame 100 as the frame vibration waveform Y in the storage unit 72.

[0120] Next, when the control unit 71 sends the door glass vibration waveform X and the frame body vibration waveform Y to the waveform synthesis unit 75, the waveform synthesis unit 75 synthesizes the door glass vibration waveform X and the frame body vibration waveform Y, and extracts only the relative vibration of the door glass 2 with respect to the frame body 100 as the synthesized vibration waveform Z. More specifically, the value obtained by subtracting the value of the frame body vibration waveform Y from the value of the door glass vibration waveform X is sent as the synthesized vibration waveform Z to the control unit 71, and the control unit 71 stores the synthesized vibration waveform Z in the storage unit 72.

[0121] Thus, when the vehicle is traveling on a road with bad road conditions, various sounds other than the sound of the glass run 10 are mixed due to vibrations. However, by extracting only the relative vibration of the door glass 2 with respect to the frame 100 , only the sound generated by the glass run 10 can be detected.

[0122] Then, the control unit 71 reads the synthesized vibration waveform Z stored in the storage unit 72 , and generates vibration based on the synthesized vibration waveform Z from the vibrator 40 provided on the vehicle outer side, thereby vibrating the door glass 2 .

[0123] The sound at this time is detected by the microphone 50 installed inside the vehicle and visualized. The visualization is expressed by visualization based on coloring, or as Figure 8 As shown, it is expressed by visualization based on shading.

[0124] By reading and using the synthesized vibration waveform Z stored in the storage unit 72 in this manner, the vibration of the glass run channel 10 and the sound accompanying the vibration that occurs when an actual automobile travels on a road with bad road conditions can be reproduced, so that the test can be performed multiple times in a state where an actual automobile travels on a road with bad road conditions.

[0125] Thus, the glass run 10 having a more excellent shape and material can be designed in consideration of the vibration of the glass run 10 when the vehicle travels on a road with poor road conditions.

[0126] In addition, although it is expressed as "a road in poor condition", it is difficult to define it correctly. Compared with a flat road, a muddy road or a road with potholes can be called a "road in poor condition". In addition, compared with a highway, a general highway may also be called a "road in poor condition". In addition, even if it is a highway, a road that has been in disrepair for a long time may also be called a "road in poor condition" compared with a newly paved road.

[0127] Therefore, the invention can be applied as long as the vehicle is running, but is effective when designing the glass run 10 so as not to generate noise when the vehicle is running on a road with at least slightly poor conditions.

[0128] In the embodiment of the present invention, the vibration based on the synthetic vibration waveform Z is generated from the vibrator 40 to vibrate the door glass 2 of an actual automobile in which the glass run 10 is assembled, thereby reproducing the vibration of the glass run 10 and the sound accompanying the vibration generated when the door is closed or when the vehicle is running. However, the same structure can be reproduced on a test bench instead of an actual automobile.

[0129] That is, the glass run 10 is mounted on a simulated frame 101 corresponding to the frame 100 set on a test bench, and is brought into a state where a simulated door glass 102 corresponding to the door glass 2 is guided to the groove portion 19 of the glass run 10, so that vibrations based on the synthetic vibration waveform Z are generated from the exciter 40 set on the surface side of the simulated door glass 102, causing the simulated door glass 102 to vibrate, and a sound caused by the vibrations based on the synthetic vibration waveform Z generated from the exciter 40 is detected using the microphone 50 set on the back side of the simulated door glass 102.

[0130] Then, the sound detected by the microphone 50 is visualized by being displayed on the display of the output unit 73 .

[0131] In addition, if Fig. 9 As shown, the control device 70 may be provided with a waveform correction unit 76 for updating the synthesized vibration waveform Z.

[0132] The waveform correction control at this time is provided as a subsequent process of the following process, and the following process is: the door glass vibration waveform X and the frame vibration waveform Y are synthesized by the waveform synthesis unit 75, and only the relative vibration of the door glass 2 relative to the frame 100 is extracted and used as the synthesized vibration waveform Z. According to the instruction of the control unit 71, the vibration based on the obtained synthesized vibration waveform Z is generated from the exciter 40 to vibrate the door glass 2.

[0133] For this waveform correction control, refer to Fig.10 First, the control unit 71 reads the synthesized vibration waveform Z obtained by synthesizing the door glass vibration waveform X and the frame vibration waveform Y from the storage unit 72, and stores the value as the register variable (Register) Z0 (step S101 (hereinafter, the word "step" is omitted in brackets)).

[0134] Next, the control unit 71 generates vibrations based on the synthesized vibration waveform Z from the vibrator 40 provided on the vehicle outer side to artificially vibrate the door glass 2 ( S102 ), and the sound at this time is detected by the microphone 50 ( S103 ).

[0135] Next, the control unit 71 extracts the synthetic vibration waveform when the door glass 2 is artificially vibrated again through the detection of the door glass sensor 20 and the frame sensor 30, and stores the value in the register R as the real synthetic vibration waveform R (S104). At this time, the waveform synthesis unit 75 synthesizes the glass vibration waveform X detected by the door glass sensor 20 and the frame vibration waveform Y detected by the frame sensor 30, and extracts only the relative vibration of the door glass 2 with respect to the frame 100 as the real synthetic vibration waveform R.

[0136] Next, the control unit 71 compares the waveform of the register variable R corresponding to the real synthetic vibration waveform R with the register variable Z0 corresponding to the synthetic vibration waveform caused by the vibration of the glass run channel alone when the vehicle door is closed (vehicle parking state) or when the vehicle is traveling on a road with poor road conditions (S105), and determines whether the difference between the two is less than a certain value Q (S106). In this embodiment, it is determined whether the average difference in the amplitude of the synthetic vibration waveform at multiple times is less than the certain value Q.

[0137] Then, the control unit 71 reduces the output (power) of the oscillator 40 (S107) when the value of the register variable R is greater than the value of the register variable Z0, and conversely increases the output (power) of the oscillator 40 (S108) when the value of the register variable R is less than the value of the register variable Z0.

[0138] At this time, the decreasing rate and increasing rate of the output of the exciter 40 are predetermined, and gradually decrease or increase.

[0139] Next, the control unit 71 instructs the waveform correction unit 76 to update the synthesized vibration waveform Z when the vibrator 40 is used to vibrate next so that the synthesized vibration waveform becomes the synthesized vibration waveform when the output of the vibrator 40 is decreased or increased ( S109 ).

[0140] Thus, the process returns to step S102 , and the vibrator 40 vibrates with the updated synthetic vibration waveform Z, and extracts the true synthetic vibration waveform R in the same manner as before. The true synthetic vibration waveform R changes as the output of the vibrator 40 changes.

[0141] This process is repeated, and in step S105, when the difference between the waveform of the register variable R corresponding to the true combined vibration waveform R and the register variable Z0 corresponding to the combined vibration waveform caused by the vibration of the glass run only is less than a certain value Q, the waveform correction control process ends.

[0142] In this case, the sound finally detected by the microphone 50 in step S103 is the noise to be evaluated. Then, a process of visualizing the sound is performed for the noise.

[0143] In this case, although the sound is usually detected by the microphone 50 when the vibrator 40 is vibrated, Fig.11 As shown in the flowchart, the waveform of the register variable R corresponding to the actual synthetic vibration waveform R is compared with the register variable Z0 corresponding to the synthetic vibration waveform caused by only the vibration of the glass run channel when the vehicle door is closed (the vehicle is parked) or when driving on a road with poor road conditions. When the difference between the two is less than a certain value Q ("Yes" in step S105), the exciter 40 vibrates again (S110) and the sound at this time is detected (S111). The detection of such a sound can also be performed only once.

[0144] In the comparison between the synthesized vibration waveform Z0 and the true synthesized vibration waveform R in step S105 , it is determined whether the average of the differences in the amplitudes of the synthesized vibration waveforms at multiple times is less than a certain value Q, but this is not particularly limited to this and other methods may be used.

[0145] In addition, for the comparison between the synthetic vibration waveform Z0 and the true synthetic vibration waveform R, the following control is adopted: the amplitudes are compared, and when the difference between the two waveforms (the absolute value of the difference) is not below a certain value Q, the output of the exciter 40 is increased or decreased. However, this control may be replaced by, or based on, the following control: the difference in the frequencies of the two waveforms is detected, and when there is a difference, the true synthetic vibration waveform R is made close to the synthetic vibration waveform Z0.

[0146] In addition, the waveform correction unit 76 may not be particularly provided, but the control unit 71 may execute the processing of the waveform correction unit 76 .

[0147] Accordingly, in an actual automobile, a waveform correction step is provided as a subsequent step of the step of vibrating the door glass 2, and is controlled in such a manner that the actual synthetic vibration waveform R when the door glass 2 is artificially vibrated by generating a vibration based on the synthetic vibration waveform from the exciter 40 is close to the synthetic vibration waveform Z0, thereby making it possible to more accurately reproduce the vibration of the glass run chute 10 and the sound accompanying the vibration generated in the actual automobile using the actual automobile.

[0148] That is, originally, when the door glass 2 is artificially vibrated by generating vibrations based on the synthetic vibration waveform from the vibrator 40, the real synthetic vibration waveform R should be the same as the synthetic vibration waveform Z0. However, for example, along with the vibration of the vibrator 40, the support (not shown) on which the vibrator 40 is mounted also vibrates, so that the vibration is attenuated or the vibration changes according to the actual environment in which the car is placed. Therefore, feedback control is performed to correct this so that the real synthetic vibration waveform R is the same as the synthetic vibration waveform Z0.

[0149] Even when the test is performed using a test bench, the above-mentioned waveform correction step can be provided as a step subsequent to the step of vibrating the simulated door glass 102 to perform noise evaluation.

[0150] In addition, in the embodiment of the present invention, when the door glass sensor 20 and the frame sensor 30 detect the generated vibration, the door glass 2 is located between the fully closed state and the half-open (1 / 2 open) state, but the vibration can be detected even when it is fully opened or fully closed. However, when the door glass 2 is fully opened, the amplitude of the vibration is small and the sound is difficult to be transmitted to the inside of the vehicle, so it is preferably in a lowered state other than fully opened.

[0151] Although the sound detected by the microphone 50 is visualized by coloring or shading, it may be expressed only by the strength of the sound.

Claims

1. A method for evaluating noise of a glass run channel, wherein the glass run channel is embedded and installed along a frame provided in a vehicle door and guides a door glass being raised and lowered toward a groove portion, wherein: have: The step of detecting the vibration of the door glass by a door glass sensor and storing the detected vibration as a door glass vibration waveform, and detecting the vibration of the frame by a frame sensor and storing the detected vibration as a frame vibration waveform, when the glass run channel is mounted on the vehicle; A step of synthesizing the door glass vibration waveform and the frame vibration waveform, extracting only the relative vibration of the door glass with respect to the frame and storing it as a synthesized vibration waveform; A step of causing a vibration based on the synthesized vibration waveform to be generated from a vibrator provided on the outside of the vehicle to vibrate the door glass while the vehicle is parked; A step of detecting a sound caused by the vibration based on the synthesized vibration waveform generated from the exciter by a microphone installed inside the vehicle.

2. A method for evaluating noise of a glass run channel, wherein the glass run channel is embedded and installed along a frame provided in a vehicle door and guides a door glass being raised and lowered toward a groove portion, wherein: have: The step of detecting the vibration of the door glass by a door glass sensor and storing the detected vibration as a door glass vibration waveform, and detecting the vibration of the frame by a frame sensor and storing the detected vibration as a frame vibration waveform, when the glass run channel is mounted on the vehicle; A step of synthesizing the door glass vibration waveform and the frame vibration waveform, extracting only the relative vibration of the door glass with respect to the frame and storing it as a synthesized vibration waveform; The glass run is mounted on a simulated frame corresponding to the frame provided on a test bench, so that the simulated door glass corresponding to the door glass is guided toward the groove portion of the glass run, and a vibration based on the synthesized vibration waveform is generated from an exciter provided on the surface side of the simulated door glass to vibrate the simulated door glass; A step of detecting a sound caused by the vibration based on the synthesized vibration waveform generated from the exciter by a microphone provided on the back side of the simulated door glass.

3. The method for evaluating noise of a glass run according to claim 1 or 2, wherein: The door glass sensor and the frame sensor detect vibrations generated when the vehicle is driven.

4. The method for evaluating noise of a glass run according to claim 1 or 2, wherein: The door glass sensor and the frame sensor detect vibration generated when the vehicle stops and the door changes from an open state to a closed state.

5. The method for evaluating noise of a glass run according to any one of claims 1 to 4, wherein: When the door glass sensor and the frame sensor detect the generated vibration, the door glass is brought into a lowered state other than a fully opened state.

6. The method for evaluating noise of a glass run according to any one of claims 1 to 5, wherein: The method further includes a step of visualizing the sound detected by the microphone.

7. The method for evaluating noise of a glass run according to claim 1, wherein: As a step subsequent to the step of vibrating the door glass, a waveform correction step is provided. The waveform correction process is to generate vibration based on the synthetic vibration waveform from the exciter, extract the synthetic vibration waveform when the door glass is artificially vibrated as a real synthetic vibration waveform through detection by the door glass sensor and the frame sensor, compare the real synthetic vibration waveform with the synthetic vibration waveform, and change the output of the exciter in such a way that the difference between the two becomes less than a certain value to correct the real synthetic vibration waveform. The synthesized vibration waveform in the step of detecting the sound is the true synthesized vibration waveform corrected in the waveform correction step.

8. The method for evaluating noise of a glass run according to claim 2, wherein: As a step subsequent to the step of vibrating the simulated door glass, a waveform correction step is provided. The waveform correction process is to generate vibration based on the synthetic vibration waveform from the exciter, extract the synthetic vibration waveform when the simulated door glass is artificially vibrated as a real synthetic vibration waveform through detection by the door glass sensor and the frame sensor, compare the real synthetic vibration waveform with the synthetic vibration waveform, and change the output of the exciter in such a way that the difference between the two becomes less than a certain value to correct the real synthetic vibration waveform. The synthesized vibration waveform in the step of detecting the sound is the true synthesized vibration waveform corrected in the waveform correction step.

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