CN112082640A - Method and system for testing abnormal sound of automotive interior - Google Patents
Method and system for testing abnormal sound of automotive interior Download PDFInfo
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Abstract
A method and a system for testing the abnormal sound of the interior trim of an automobile are provided, the method comprises the following steps: when the controller obtains a test instruction sent by the server, a loudspeaker in the vehicle is controlled to sequentially play sine wave scanning signals of a plurality of frequency bands so as to excite each interior trim in the vehicle to vibrate, and the controller obtains vibration signals collected by a PCB three-way acceleration sensor on each interior trim in real time; the controller binds and sends the vehicle identification of the vehicle, the interior identification of the interior and the obtained vibration signal corresponding to each interior to the server; the server acquires the information sent by the controller and makes an acceleration frequency spectrogram corresponding to each interior trim according to the vibration signal; and the server compares the acceleration frequency spectrogram of each interior with the corresponding reference acceleration frequency spectrogram, and determines that the current interior is the abnormal vibration interior when the amplitude difference value of the acceleration frequency spectrogram of the current interior and the corresponding reference acceleration frequency spectrogram on any frequency reaches a threshold value.
Description
Technical Field
The invention relates to the field of automobiles, in particular to a method and a system for testing the abnormal sound of automotive interiors.
Background
With the development of the automobile industry, people gradually improve the requirements for the riding comfort of the whole automobile, which makes the performance design of the automobile very important. Automotive interiors are important components in automobiles and directly affect the sensory perception of people.
In the production process of automobiles, quality detection of vehicles is required, wherein the abnormal sound of the interior decoration is one of detection items. At present, in the process of investigating the abnormal sound of the automobile interior, a commonly used method is road test investigation. One driver needs to drive the automobile to run on a special abnormal sound road test, and the other special technician needs to listen to the position of the abnormal sound of the interior decoration of the automobile.
The method for investigating the abnormal sound of the automobile interior trim can investigate the abnormal sound of the automobile interior trim, but needs a driver and two persons to complete the abnormal sound investigation. The special road for the automobile abnormal sound test is needed, the problem of the abnormal sound of the automobile interior trim is complex to investigate, subjective judgment of a driver is relied on, and the accuracy is low.
Disclosure of Invention
In view of the above situation, it is necessary to provide a method and a system for testing abnormal sound of an automobile interior, aiming at the problems of tedious test and low accuracy rate of the abnormal sound of the automobile interior in the prior art.
An automotive interior abnormal sound testing method is applied to an automotive interior abnormal sound testing system, the automotive interior abnormal sound testing system comprises a server, a controller connected with the server and a plurality of PCB three-way acceleration sensors connected with the controller, the plurality of PCB three-way acceleration sensors are respectively used for being installed on each interior of a vehicle, and the automotive interior abnormal sound testing method comprises the following steps:
when the controller acquires a test instruction sent by the server, a loudspeaker in a vehicle is controlled to sequentially play sine wave scanning signals of multiple frequency bands so as to excite each interior trim in the vehicle to vibrate, and the controller acquires vibration signals acquired by a PCB three-way acceleration sensor on each interior trim in real time;
the controller binds and sends the vehicle identification of the vehicle, the interior trim identification of the interior trim and the obtained vibration signal corresponding to each interior trim to the server;
the server acquires the information sent by the controller, and makes an acceleration frequency spectrogram corresponding to each interior according to the vibration signal, wherein the acceleration frequency spectrogram is a curve graph of the vibration signal changing along with the excitation frequency;
and the server compares the acceleration frequency spectrogram of each interior with the corresponding reference acceleration frequency spectrogram, and determines that the current interior is an abnormal vibration interior when the amplitude difference between the acceleration frequency spectrogram of the current interior and the corresponding reference acceleration frequency spectrogram at any frequency reaches a threshold value.
Further, in the method for testing abnormal sound of an automobile interior, when the server is connected to a plurality of controllers, the method for testing abnormal sound of an automobile interior further includes:
when each controller is connected with a vehicle, state identification information is sent to the server;
and when the server acquires the state identification information, sending a test instruction to the controller.
Further, in the above method for testing the abnormal sound of the interior of the automobile, before the step of sending the test command to the controller, the method further includes:
the server inquires whether a test mark set by the system is a preset value or not;
if yes, executing the step of sending a test instruction to the controller;
and if not, the server adds the controller identifier of the controller in a test list, and sends a test instruction to the controller corresponding to the target controller identifier when acquiring the target controller identifier selected by the user from the test list.
Further, the method for testing the abnormal sound of the automotive interior, wherein the step of manufacturing the acceleration spectrogram corresponding to each interior according to the vibration signal further includes:
and removing background noise from the vibration signal through a high-pass filter.
Further, the method for testing the abnormal sound of the automotive interior, wherein the step of determining that the current interior is an abnormal vibration interior further includes:
and the server outputs the test result of the abnormal sound of the automobile interior trim of the vehicle.
Further, the above method for testing the abnormal sound of the automobile interior trim, wherein the sine wave scanning signal: 20-30Hz sine wave scanning signal, 30-40Hz sine wave scanning signal, 40-50Hz sine wave scanning signal, 50-60Hz sine wave scanning signal, 60-70Hz sine wave scanning signal, 70-80Hz sine wave scanning signal, 80-90Hz sine wave scanning signal, 90-100Hz sine wave scanning signal, 100-110Hz sine wave scanning signal, 110-120Hz sine wave scanning signal.
The embodiment of the invention also provides an automobile interior trim abnormal sound testing system, which comprises a server, a controller connected with the server and a plurality of PCB three-way acceleration sensors connected with the controller, wherein the PCB three-way acceleration sensors are respectively used for being installed on each interior trim of a vehicle, the controller comprises a control module and a first sending module, the server comprises a map making module and a comparison module, wherein,
the control module is used for controlling a loudspeaker in the vehicle to sequentially play sine wave scanning signals of a plurality of frequency bands when a test instruction sent by the server is obtained so as to excite each interior decoration in the vehicle to vibrate;
the first sending module is used for acquiring vibration signals acquired by the PCB three-way acceleration sensor on each interior trim in real time, and sending a vehicle identifier of the vehicle, an interior trim identifier of the interior trim and the acquired vibration signals corresponding to each interior trim to the server;
the map making module is used for obtaining the information sent by the controller and making an acceleration frequency spectrogram corresponding to each interior trim according to the vibration signal, wherein the acceleration frequency spectrogram is a curve graph of the vibration signal changing along with the excitation frequency;
the comparison module is used for comparing the acceleration frequency spectrogram of each interior trim with the corresponding reference acceleration frequency spectrogram, and when the amplitude difference value of the acceleration frequency spectrogram of the current interior trim and the corresponding reference acceleration frequency spectrogram on any frequency reaches a threshold value, determining that the current interior trim is an abnormal vibration interior trim.
Further, in the above system for testing abnormal sound of an automobile interior, when the server is connected to a plurality of controllers, the controllers further include:
the second sending module is used for sending state identification information to the server when each controller is connected with a vehicle;
the server further comprises a third sending module, and the third sending module is used for sending a test instruction to the controller when the server acquires the state identification information.
Further, the above-mentioned automotive interior abnormal sound test system, wherein, the server further includes:
the query module is used for querying whether the test mark set by the system is a preset value;
the execution module is used for adding the controller identifier of the controller in a test list when the test mark is the preset value;
and the fourth sending module is used for sending a test instruction to the controller corresponding to the target controller identifier when the target controller identifier selected by the user from the test list is obtained.
Further, the above-mentioned automotive interior abnormal sound test system, wherein, the server further includes:
and the filtering module is used for removing the background noise of the vibration signal through a high-pass filter.
The automobile interior abnormal sound testing system is adopted to test the abnormal sound of the interior of the automobile, the testing system is used for collecting vibration signals of all the interiors, an acceleration frequency spectrogram is made, and the acceleration frequency spectrogram is compared with a reference acceleration frequency spectrogram, so that the interior with the abnormal sound is determined. By the system, the automatic test of the abnormal sound of the interior trim of the vehicle can be realized without a professional abnormal sound road test, and the vehicle test efficiency and the test accuracy are improved.
Drawings
Fig. 1 is a flowchart of a method for testing abnormal noise of an interior of an automobile according to a first embodiment of the present invention;
fig. 2 is a flowchart of a method for testing abnormal sound of an interior of an automobile according to a second embodiment of the present invention;
fig. 3 is a block diagram illustrating a structure of an automotive interior abnormal sound testing system according to a third embodiment of the present invention;
FIG. 4 is a block diagram of a controller according to a third embodiment of the present invention;
fig. 5 is a block diagram of a server according to a third embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited correspondingly. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
Fig. 1 is a diagram illustrating a method for testing abnormal sound of an automobile interior according to a first embodiment of the present invention, where the method is applied to an automobile interior abnormal sound testing system, and the automobile interior abnormal sound testing system includes a server, a controller wirelessly connected to the server, and a plurality of PCB three-way acceleration sensors connected to the controller. The controller is connected with the server in wireless communication modes such as WIFI, Bluetooth and ZigBee. The PCB three-way acceleration sensor is used for collecting vibration signals and can be connected with a controller through a data interface.
When the vehicle interior trim abnormal sound is measured, the controller is connected with vehicle-mounted multimedia of a vehicle in a wireless communication mode such as Bluetooth and WIFI, and the controller can also be connected through a data interface. Meanwhile, each PCB three-directional acceleration sensor is mounted on an interior trim of an automobile, specifically, for example, an instrument panel, a console panel, a door trim, a tailgate trim, a ceiling, or the like. The method for testing the abnormal sound of the automobile interior comprises the steps of S11-S15.
And step S11, when the controller acquires the test instruction sent by the server, controlling a loudspeaker in the vehicle to sequentially play sine wave scanning signals of a plurality of frequency bands so as to excite each interior trim in the vehicle to vibrate, and acquiring vibration signals acquired by the PCB three-way acceleration sensor on each interior trim in real time by the controller.
The server can send a test instruction to the controller to start the vehicle interior trim abnormal sound test. When the controller acquires the test instruction, the loudspeaker in the vehicle connected with the controller is controlled to sequentially play sine wave scanning signals of a plurality of frequency bands so as to excite each interior decoration to vibrate. In specific implementation, the following sine wave scanning signals of 10 frequency segments can be recorded in advance through scanning frequencies of audio production software: 20-30Hz sine wave scanning signal, 30-40Hz sine wave scanning signal, 40-50Hz sine wave scanning signal, 50-60Hz sine wave scanning signal, 60-70Hz sine wave scanning signal, 70-80Hz sine wave scanning signal, 80-90Hz sine wave scanning signal, 90-100Hz sine wave scanning signal, 100-110Hz sine wave scanning signal, 110-120Hz sine wave scanning signal.
By adopting the sine wave scanning signals of the frequency bands, the frequency which can be excited by the automobile loudspeaker can cover most of frequencies for investigating special road sections for automobile interior abnormal sound, such as: european brick, Belgian brick road, washboard road.
The sine wave scanning signals of the multiple frequency bands can be stored in the vehicle-mounted terminal in advance, and can also be played under the control of the controller after being connected with vehicle-mounted multimedia through a U disk or mobile phone Bluetooth.
The controller can control the multimedia system of the vehicle to play audio through a program, and besides, the controller can also control the playing volume of the loudspeaker. After the controller is connected with the vehicle-mounted multimedia, sine wave scanning signals of all frequency segments are played in sequence, and the volume and the bass effect of the loudspeaker are adjusted to be maximum. The automobile loudspeaker plays each sine wave scanning signal, so that the automobile interior is excited to vibrate, at the moment, the PCB three-way acceleration sensor can collect vibration signals generated by the interior in real time and transmit the vibration signals to the front end of the LMS data collector, and then the signals are input into the controller through the front end.
Step S12, the controller binds and sends the vehicle identification of the vehicle, the interior identification of the interior and the obtained vibration signal corresponding to each interior to the server.
The controller binds and sends the vibration signals of the interior trim collected by the PCB three-way acceleration sensor, the vehicle identification and the interior trim identification to the server. During specific implementation, vibration signals collected by each PCB three-way acceleration sensor can be sent in a single signal set.
And step S13, the server acquires the information sent by the controller and makes an acceleration spectrogram corresponding to each interior trim according to the vibration signal, wherein the acceleration spectrogram is a curve graph of the vibration signal changing along with the excitation frequency.
The server acquires the vehicle identification, the interior identification and the vibration signals corresponding to the interiors, which are sent by the controller, and makes an acceleration frequency spectrogram of each interior according to the vibration signals corresponding to the interiors. The horizontal axis of the acceleration spectrogram represents the frequency of the scanning signal, and the vertical axis represents the amplitude. The vehicle mark and the interior mark are respectively used for identifying the vehicle and the interior so as to determine the vehicle and the interior to which the manufactured acceleration frequency spectrogram belongs.
Step S14, the server compares the acceleration spectrogram of each of the interior with the corresponding reference acceleration spectrogram, and determines that the current interior is an abnormal vibration interior when an amplitude difference between any one of the frequencies of the acceleration spectrogram of the current interior and the corresponding reference acceleration spectrogram reaches a threshold value.
The server is prestored with a reference acceleration frequency spectrum diagram corresponding to each interior of each type of vehicle. And the server compares each manufactured interior trim acceleration frequency spectrogram with the corresponding reference acceleration frequency spectrogram respectively, and when the amplitude difference of a certain frequency signal in the current interior trim acceleration frequency spectrogram reaches a threshold value, the interior trim at the sensor can be diagnosed as a resonance abnormal-sound interior trim part, and an abnormal vibration part can be confirmed to find the abnormal-sound interior trim. The threshold value is set according to actual needs, and may be set to 10%, for example.
In this embodiment, the abnormal sound test system for the automobile interior performs an abnormal sound test on the interior of the vehicle. The automotive interior abnormal sound testing system comprises a server, a controller connected with the server and a plurality of PCB three-way acceleration sensors connected with the controller. The controller controls a loudspeaker in the vehicle to sequentially play sine wave scanning signals of a plurality of frequency bands according to a test instruction sent by the server, acquires vibration signals collected by the PCB three-way acceleration sensor on each interior trim in real time, and sends the vibration signals to the server. And the server makes an acceleration frequency spectrum graph corresponding to each interior trim according to the vibration signal, compares the acceleration frequency spectrum graph with a corresponding reference acceleration frequency spectrum graph, and determines the abnormal sound interior trim in the vehicle according to a comparison result. By the test method, the automatic test of the abnormal sound of the interior trim of the vehicle can be realized without a special abnormal sound road test, and the test efficiency and the test accuracy of the vehicle are improved.
Referring to fig. 2, a method for testing abnormal noise of an automobile interior according to a second embodiment of the present invention includes steps S21-S29.
The test method is applied to an automotive interior abnormal sound test system, and the automotive interior abnormal sound test system comprises a server, a plurality of controllers in wireless connection with the server, and a plurality of PCB three-way acceleration sensors connected with each controller. The number of the controllers is set according to the number of the vehicles, and each vehicle is provided with one controller when the automobile interior trim abnormal sound test is carried out.
And testing, wherein the controllers are respectively connected with the vehicle-mounted multimedia of the vehicles in a wireless communication mode or a wired mode, and the PCB three-way acceleration sensors are installed on the automotive interior, such as an instrument panel, a console panel, a door interior, a tail door interior, a ceiling and the like. The automobile interior trim abnormal sound testing system can be used for simultaneously testing the interior trim abnormal sound of a plurality of vehicles.
And step S21, when each controller is connected with the vehicle, sending the state identification information to the server.
Step S22, when the server acquires the status identifier information sent by the controller, the server queries whether a test flag set by the system is a preset value, if so, step S23 is executed, otherwise, step S24 is executed.
In step S23, the server sends a test command to the controller.
In this embodiment, when each controller establishes a connection with a vehicle-mounted multimedia of a vehicle, the controller sends status identification information to the server, where the status identification information is used to identify whether the controller is connected with the vehicle.
The method comprises the steps that a test application corresponding to the automobile interior trim abnormal sound test is arranged in a server, and a test option is arranged in a system of the test application and comprises an automatic test and a semi-automatic test. When the user selects the automatic test, the test flag in the system is a preset value, for example, a flag is 1, and if the user selects the semi-automatic test, the flag is set to 0.
When the server inquires that the test mark is a preset value, the server directly determines the controller which is currently connected according to the acquired state identification information and sends a test instruction to the controller. According to the method, after the server determines that the controller is connected with the vehicle, the controller can be started to carry out the interior trim abnormal sound test on the vehicle without operation of a user.
In step S24, the server adds the controller identification of the controller to a test list.
The method comprises the steps that a test list is preset in test application of a server and used for a user to select a controller needing abnormal sound testing, and when the user sets the test application to be semi-automatic testing, the test list is displayed on a server interface. And when the server acquires the state identification information of the controller and inquires that the test mark is not a preset value, adding the controller identification of the controller into the test list.
And step S25, the server acquires the target controller identification selected by the user from the test list and sends a test instruction to the controller corresponding to the target controller identification.
In particular, a user may select one or more controllers in the test list to send test instructions. In specific implementation, in the test application, a selection button is correspondingly arranged for each controller identifier in the test list, so that a user can select the selection button. When the server acquires one or more controllers selected by the user, sending a test instruction to the selected controller.
It can be understood that, as an embodiment of the present invention, a user may select all the controller identifiers in the test list by triggering a button on the test application interface, so that the server sends a test instruction to all the controllers recorded in the test list, thereby implementing a one-key start of the interior abnormal sound test for all vehicles.
And step S26, when the controller acquires the test instruction sent by the server, controlling a loudspeaker in the vehicle to sequentially play sine wave scanning signals of multiple frequency bands so as to excite each interior trim to vibrate, and acquiring vibration signals acquired by the PCB three-way acceleration sensor on each interior trim in real time.
And step S27, the server acquires the information sent by the controller, removes background noise from the vibration signal through a high-pass filter, and then makes an acceleration spectrogram corresponding to each interior, wherein the acceleration spectrogram is a curve graph of the vibration signal changing along with the excitation frequency.
And after the server acquires the vehicle identification, the interior identification and the vibration signals corresponding to the interiors, which are sent by the controller, the background noise of the vibration signals is removed through a high-pass filter, and an acceleration spectrogram corresponding to each interior is manufactured according to the vibration signals with the background noise removed. The horizontal axis of the acceleration spectrogram represents the frequency of the sine wave scanning signal, and the vertical axis represents the amplitude.
The vehicle mark and the interior mark are respectively used for vehicle identification and interior identification, and an acceleration frequency spectrogram is correspondingly manufactured for each interior in each vehicle.
Step S28, the server compares the acceleration spectrogram of each of the interior with the corresponding reference acceleration spectrogram, and determines that the current interior is an abnormal vibration interior when an amplitude difference between any one of the frequencies of the acceleration spectrogram of the current interior and the corresponding reference acceleration spectrogram reaches a threshold value.
The server is prestored with a reference acceleration frequency spectrum diagram corresponding to each interior of each type of vehicle. And the server compares each manufactured interior trim acceleration frequency spectrogram with the corresponding reference acceleration frequency spectrogram respectively, and when the amplitude difference of a certain frequency signal in the current interior trim acceleration frequency spectrogram reaches a threshold value, the interior trim at the sensor can be diagnosed as a resonance abnormal-sound interior trim part, and an abnormal vibration part can be confirmed to find the abnormal-sound interior trim.
And step S29, the server outputs the test result of the automobile interior abnormal sound of the vehicle.
And after determining the abnormal sound inner decoration in each vehicle according to the comparison of the acceleration frequency spectrogram, the server outputs the test result of the abnormal sound of the automobile inner decoration of each vehicle so as to facilitate the user to check.
Referring to fig. 3, a system for testing abnormal noise of an automotive interior according to a third embodiment of the present invention includes a server 10, a controller 20 connected to the server 10, and a plurality of PCB three-way acceleration sensors 30 connected to the controller 20, the plurality of PCB three-way acceleration sensors 30 being respectively configured to be mounted on each interior of a vehicle, as shown in fig. 4, the controller 20 includes a control module 21 and a first sending module 22, as shown in fig. 5, the server 10 includes a map making module 11 and a comparison module 12, wherein,
the control module 21 is configured to control a speaker in a vehicle to sequentially play sine wave scanning signals of multiple frequency bands when a test instruction sent by the server is acquired, so as to excite each interior trim in the vehicle to vibrate;
the first sending module 22 is configured to obtain, in real time, a vibration signal collected by each three-way acceleration sensor on the interior trim, and send, to the server, a vehicle identifier of the vehicle, an interior trim identifier of the interior trim, and an obtained vibration signal corresponding to each interior trim;
the map making module 11 is configured to obtain information sent by the controller, and make an acceleration spectrogram corresponding to each trim according to the vibration signal, where the acceleration spectrogram is a graph of the vibration signal changing with an excitation frequency;
the comparison module 12 is configured to compare the acceleration spectrogram of each interior with a corresponding reference acceleration spectrogram, and determine that the current interior is an abnormal vibration interior when an amplitude difference between the acceleration spectrogram of the current interior and the corresponding reference acceleration spectrogram at any frequency reaches a threshold.
Further, in the system for testing the abnormal sound of the automotive interior, when the server is connected to a plurality of controllers, the controller 20 further includes a second sending module 23, and the second sending module 23 is configured to send status identification information to the server when each controller is connected to a vehicle;
the server 10 further includes a third sending module 13, where the third sending module 13 is configured to send a test instruction to the controller 20 when the server acquires the state identification information.
Further, in the above system for testing abnormal sound of automotive interior, the server 10 further includes:
the query module 14 is configured to query whether the test flag set by the system is a preset value;
the execution module 15 is configured to add a controller identifier of the controller to a test list when the test flag is the preset value;
and a fourth sending module 16, configured to send a test instruction to the controller corresponding to the target controller identifier when the target controller identifier selected by the user from the test list is obtained.
Further, in the above system for testing abnormal sound of automotive interior, the server 10 further includes:
and the filtering module 17 is used for removing the background noise of the vibration signal through a high-pass filter.
The implementation principle and the generated technical effects of the system for testing the abnormal sound of the automobile interior provided by the embodiment of the invention are the same as those of the method embodiment, and for brief description, the corresponding contents in the method embodiment can be referred to where the device embodiment is not mentioned.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The method for testing the abnormal sound of the automotive interior is characterized by being applied to an automotive interior abnormal sound testing system, wherein the automotive interior abnormal sound testing system comprises a server, a controller connected with the server and a plurality of PCB three-way acceleration sensors connected with the controller, the PCB three-way acceleration sensors are respectively used for being installed on each interior of a vehicle, and the method for testing the abnormal sound of the automotive interior comprises the following steps:
when the controller acquires a test instruction sent by the server, a loudspeaker in a vehicle is controlled to sequentially play sine wave scanning signals of multiple frequency bands so as to excite each interior trim in the vehicle to vibrate, and the controller acquires vibration signals acquired by a PCB three-way acceleration sensor on each interior trim in real time;
the controller binds and sends the vehicle identification of the vehicle, the interior trim identification of the interior trim and the obtained vibration signal corresponding to each interior trim to the server;
the server acquires the information sent by the controller, and makes an acceleration frequency spectrogram corresponding to each interior according to the vibration signal, wherein the acceleration frequency spectrogram is a curve graph of the vibration signal changing along with the excitation frequency;
and the server compares the acceleration frequency spectrogram of each interior with the corresponding reference acceleration frequency spectrogram, and determines that the current interior is an abnormal vibration interior when the amplitude difference between the acceleration frequency spectrogram of the current interior and the corresponding reference acceleration frequency spectrogram at any frequency reaches a threshold value.
2. The car interior abnormal sound testing method according to claim 1, wherein when a plurality of the controllers are connected to the server, the car interior abnormal sound testing method further comprises:
when each controller is connected with a vehicle, state identification information is sent to the server;
and when the server acquires the state identification information, sending a test instruction to the controller.
3. The method for testing the abnormal sound of the automobile interior according to claim 2, wherein the step of sending the test command to the controller further comprises:
the server inquires whether a test mark set by the system is a preset value or not;
if yes, executing the step of sending a test instruction to the controller;
and if not, the server adds the controller identifier of the controller in a test list, and sends a test instruction to the controller corresponding to the target controller identifier when acquiring the target controller identifier selected by the user from the test list.
4. The method for testing the abnormal sound of the automobile interior trim according to claim 1, wherein the step of making the acceleration spectrogram corresponding to each interior trim according to the vibration signal further comprises the following steps of:
and removing background noise from the vibration signal through a high-pass filter.
5. The automotive interior abnormal sound testing method according to claim 1, wherein the step of determining that the current interior is an abnormally vibrating interior is followed by further comprising:
and the server outputs the test result of the abnormal sound of the automobile interior trim of the vehicle.
6. The method for testing the abnormal sound of the automobile interior according to claim 1, wherein the sine wave scanning signal: 20-30Hz sine wave scanning signal, 30-40Hz sine wave scanning signal, 40-50Hz sine wave scanning signal, 50-60Hz sine wave scanning signal, 60-70Hz sine wave scanning signal, 70-80Hz sine wave scanning signal, 80-90Hz sine wave scanning signal, 90-100Hz sine wave scanning signal, 100-110Hz sine wave scanning signal, 110-120Hz sine wave scanning signal.
7. The automotive interior abnormal sound testing system is characterized by comprising a server, a controller and a plurality of PCB three-way acceleration sensors, wherein the controller is connected with the server, the PCB three-way acceleration sensors are respectively used for being installed on each interior of a vehicle, the controller comprises a control module and a first sending module, the server comprises a map making module and a comparison module, the comparison module is connected with the controller,
the control module is used for controlling a loudspeaker in the vehicle to sequentially play sine wave scanning signals of a plurality of frequency bands when a test instruction sent by the server is obtained so as to excite each interior decoration in the vehicle to vibrate;
the first sending module is used for acquiring vibration signals acquired by the PCB three-way acceleration sensor on each interior trim in real time, and sending a vehicle identifier of the vehicle, an interior trim identifier of the interior trim and the acquired vibration signals corresponding to each interior trim to the server;
the map making module is used for obtaining the information sent by the controller and making an acceleration frequency spectrogram corresponding to each interior trim according to the vibration signal, wherein the acceleration frequency spectrogram is a curve graph of the vibration signal changing along with the excitation frequency;
the comparison module is used for comparing the acceleration frequency spectrogram of each interior trim with the corresponding reference acceleration frequency spectrogram, and when the amplitude difference value of the acceleration frequency spectrogram of the current interior trim and the corresponding reference acceleration frequency spectrogram on any frequency reaches a threshold value, determining that the current interior trim is an abnormal vibration interior trim.
8. The system for testing automobile interior noise according to claim 7, wherein when a plurality of the controllers are connected to the server, the controller further comprises:
the second sending module is used for sending state identification information to the server when each controller is connected with a vehicle;
the server further comprises a third sending module, and the third sending module is used for sending a test instruction to the controller when the server acquires the state identification information.
9. The automotive interior abnormal sound testing system of claim 8, wherein the server further comprises:
the query module is used for querying whether the test mark set by the system is a preset value;
the execution module is used for adding the controller identifier of the controller in a test list when the test mark is the preset value;
and the fourth sending module is used for sending a test instruction to the controller corresponding to the target controller identifier when the target controller identifier selected by the user from the test list is obtained.
10. The automotive interior abnormal sound testing system of claim 7, wherein the server further comprises:
and the filtering module is used for removing the background noise of the vibration signal through a high-pass filter.
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