CN115655742A - Whole car road test braking noise data analysis equipment - Google Patents
Whole car road test braking noise data analysis equipment Download PDFInfo
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- CN115655742A CN115655742A CN202211296456.8A CN202211296456A CN115655742A CN 115655742 A CN115655742 A CN 115655742A CN 202211296456 A CN202211296456 A CN 202211296456A CN 115655742 A CN115655742 A CN 115655742A
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Abstract
The invention provides a whole vehicle road test brake noise data analysis device, which comprises: the data acquisition module is used for recording the required test data of whole car road test when satisfying the trigger condition that predetermines, and the data acquisition module includes: the data acquisition card is used for acquiring working condition data in the whole vehicle road test process; the data acquisition system is provided with a second acquisition channel of the NVH data and is used for summarizing the acquired NVH data and the working condition data to obtain test data; the data analysis module is connected with the data acquisition module, and the data analysis module includes: the preprocessing unit is used for preprocessing the test data; and the analysis unit is used for analyzing the preprocessed test data to obtain corresponding test data when brake noise occurs in the whole vehicle road test process. Has the beneficial effects that: the invention can automatically identify whether the braking noise occurs in the whole vehicle road test process, accurately record the test data when the braking noise occurs, and improve the working efficiency of the braking noise search.
Description
Technical Field
The invention relates to the technical field of whole vehicle road test and brake noise test, in particular to whole vehicle road test brake noise data analysis equipment.
Background
The brake noise refers to noise generated by a brake in the braking process of the whole vehicle. The brake noise not only causes serious noise pollution, but also causes uncomfortable feeling to passengers in the vehicle, and affects driving of the driver. The generation of the brake noise is not only caused by improper operation, but also can be a fault of the vehicle, and if the brake noise occurs in the running process, measures should be taken in time to immediately overhaul and remove, so that the running safety is ensured.
After the vehicle is manufactured, a series of tests are usually performed on the entire vehicle, including the brake noise test. However, because the whole vehicle has many test items and the test time period of the brake noise is long, the whole vehicle can generate a large amount of working condition data in the test process, and the existing mode of manually recording the brake noise needs to find the working condition data at the moment of generating the brake noise from the large amount of working condition data, so that the searching workload is large, and the efficiency is low.
Disclosure of Invention
In order to solve the technical problems, the invention provides a whole vehicle road test braking noise data analysis device.
The technical problem solved by the invention can be realized by adopting the following technical scheme:
a whole vehicle road test braking noise data analysis device, comprising:
a data acquisition module for record the required test data of whole car road test when satisfying a predetermined trigger condition, data acquisition module includes:
the data acquisition card is integrally packaged with a plurality of first acquisition channels and is used for acquiring working condition data in the whole vehicle road test process;
the data acquisition system is connected with the data acquisition card, is provided with a second acquisition channel of NVH data and is used for summarizing the acquired NVH data and the received working condition data to obtain the test data;
a data analysis module connected to the data acquisition module, the data analysis module comprising:
the preprocessing unit is used for preprocessing the test data;
and the analysis unit is connected with the preprocessing unit and used for analyzing the preprocessed test data to obtain the corresponding test data when the brake noise occurs in the whole vehicle road test process.
Preferably, the preset triggering condition is that the brake pressure of the whole vehicle exceeds a preset threshold.
Preferably, the data acquisition module comprises:
and the recording unit is used for recording the test data corresponding to the current moment under the control of an external input signal and storing the test data.
Preferably, the data acquisition module comprises: and the key unit is used for outputting the external input signal after being pressed by a tester when the brake noise occurs.
Preferably, the analysis unit comprises:
and the noise identification subunit is used for identifying whether the brake noise occurs according to the test data, outputting the corresponding test data when the brake noise occurs, and storing the test data.
Preferably, the data analysis module further comprises: and the report generating unit is connected with the analyzing unit and used for generating and outputting a test report according to the test data output by the analyzing unit.
Preferably, the data analysis module further comprises:
the template configuration unit is preset with a plurality of report templates and is used for generating the report templates in a self-defined mode or generating new report templates after the preset report templates are configured;
the report generating unit is connected with the template configuration unit and used for processing the test data according to the report template to generate the test report.
Preferably, the operating condition data includes: ACW data, GPS data, and vehicle bus data; the ACW data at least comprises any one of a disc temperature, pipeline pressure and environment temperature and humidity;
the GPS data includes at least any one of a vehicle speed, an accumulated mileage, and a deceleration.
Preferably, the data acquisition card is connected with the data acquisition system through a three-in-one interface.
Preferably, the data acquisition system is an LMS SCADAS XS device.
The technical scheme of the invention has the advantages or beneficial effects that:
the invention can automatically identify whether the braking noise occurs in the whole vehicle road test process, accurately record the test data when the braking noise occurs, improve the working efficiency of braking noise search, and reduce the time and manpower resource of braking noise search.
Drawings
FIG. 1 is a block diagram of the whole vehicle test braking noise data analysis device in the preferred embodiment of the present invention;
FIG. 2 is a diagram illustrating an embodiment of a data collection module according to the present invention;
FIG. 3 is a schematic diagram illustrating an algorithm flow implemented by the noise identification subunit of the data analysis module according to the preferred embodiment of the present invention;
FIGS. 4a-4c are schematic diagrams of exemplary implementations of test reports generated in accordance with a preferred embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
Referring to fig. 1, in accordance with the preferred embodiment of the present invention, there is provided a whole vehicle road test braking noise data analyzing apparatus, based on the above problems in the prior art, comprising:
a data acquisition module 1 for recording the required test data of whole car road test when satisfying a preset trigger condition, data acquisition module 1 includes:
the data acquisition card 11 is integrally packaged with a plurality of first acquisition channels and is used for acquiring working condition data in the whole vehicle road test process;
the data acquisition system 12 is connected with the data acquisition card 11, and the data acquisition system 12 is configured with a second acquisition channel of the NVH data and used for summarizing the acquired NVH data and the received working condition data to obtain test data;
a data analysis module 2 connected to the data acquisition module 1, the data analysis module 2 comprising:
a preprocessing unit 21, for preprocessing the test data;
and the analysis unit 22 is connected with the preprocessing unit 21 and is used for analyzing the preprocessed test data to obtain corresponding test data when brake noise occurs in the whole vehicle road test process.
Specifically, the embodiment of the present invention provides a complete vehicle road test data acquisition and data analysis device which is independently developed based on the data acquisition system LMS SCADAS XS of NVH data, and the device can acquire and record data of a vehicle when noise occurs during a road test driving process, including but not limited to, for example: vehicle speed, thermocouple, brake noise, brake pressure, accelerometer value, temperature and humidity, etc. The equipment starts an acquisition function, and sets a preset trigger condition, so that after the trigger condition is met, various data and working conditions when the braking noise occurs can be automatically recorded. In the data analysis stage, specific data and working conditions when noise occurs can be tracked according to records, and working efficiency and accuracy are effectively improved in a large amount of noise searching work.
In hardware, as shown in fig. 2, analog signals required in the road test process of the whole vehicle are as follows: the Vehicle Bus, ACW, GPS and NVH are integrated and converted into digital signals in a data acquisition card 11. The data acquisition card 11 and the circuit are welded and packaged in a portable box. The signal acquisition channel can be freely added or deleted on the data acquisition card 11 according to the road test requirement, and the function is more convenient and modular.
In the software algorithm, the acquired test data is processed by an independently written Matlab program and then automatically generated into an Excel test report, so that the presentation modes of the read data and the final report are simplified, and meanwhile, the working efficiency is effectively improved. The invention not only greatly reduces the research and development cost in equipment purchase, but also can maximally play the functions of each module of the data acquisition equipment in road tests of different environments and requirements for customers.
In a preferred embodiment, the preset triggering condition is that the brake pressure of the entire vehicle exceeds a preset threshold.
Specifically, in this embodiment, the present invention is mainly used for measuring the braking noise, and therefore, the triggering condition is set to determine whether the braking pressure of the entire vehicle exceeds a preset threshold, and when the braking pressure exceeds the preset threshold, the acquisition function is started. The preset threshold value can be adjusted according to the actual whole vehicle road test, and the invention does not limit the specific numerical value.
As a preferred embodiment, among others, the data acquisition module 1 includes:
and the recording unit 13 is used for recording the test data corresponding to the current moment under the control of an external input signal and storing the test data.
As a preferred embodiment, among others, the data acquisition module 1 includes: and the key unit 13 is used for outputting an external input signal after being pressed by a tester when the brake noise occurs.
Specifically, in addition to the above-mentioned automatic identification and judgment of whether the brake noise exists by using the software algorithm, so as to track the specific data and the working condition when the noise occurs, the embodiment of the present invention also has a subjective road test evaluation requirement, and when a backseat tester hears the brake noise, an external input signal can be triggered, so as to automatically record the specific working condition when the current brake noise occurs.
Furthermore, the key unit uses a key as a carrier, the key can be directly integrated and packaged on the packaging box body of the data acquisition card 11, and when the brake noise is heard, the key is pressed to trigger the automatic recording function. Or the keys can be arranged in an extending mode through the data lines, so that the triggering requirements of different distances are met.
Further, among others, the preprocessing unit 21 includes: a format conversion subunit for converting the test data into a predetermined format for processing by the analysis unit 22. By way of example and not limitation, the predetermined format may be a Matlab format.
As a preferred embodiment, among others, the analysis unit 22 includes:
and the noise identification subunit 221 is configured to identify whether the brake noise occurs according to the test data, and output and store corresponding test data when the brake noise occurs.
Specifically, the noise identification subunit 221 is implemented based on an autonomously written Matlab program, and a Matlab software algorithm automatically searches a data working condition of the vehicle when braking noise occurs in a road test process, as shown in fig. 3, the identification process is as follows:
a1, counting and storing working condition parameters according to working condition data, and summarizing when a test report is derived and generated;
a2, for sound data in NVH data: performing sound spectrum calculation according to sound data in the NVH data; judging whether brake noise exists or not: if yes, keeping statistics of the brake noise and the corresponding group of working condition parameters, and entering A3; otherwise, the sound frequency spectrum calculation is carried out again;
a3, for vibration acceleration data in NVH data: calculating a vibration frequency spectrum according to vibration acceleration data in the NVH data; judging whether Acc is larger than 0.5g: if yes, keeping statistics of the brake noise and the corresponding group of working condition parameters; otherwise, the process enters A2 to process the sound data.
The A2 and the A3 are not in sequence.
As a preferred embodiment, among others, the data analysis module 2 further includes: and a report generating unit 23 connected to the analyzing unit 22 for generating and outputting a test report according to the test data output by the analyzing unit 22.
As a preferred embodiment, among others, the data analysis module 2 further includes:
the template configuration unit 24 is preset with a plurality of report templates and is used for generating the report templates in a self-defined manner or generating new report templates after configuring the preset report templates;
the report generating unit 23 is connected to the template configuring unit 24, and is configured to process the test data according to the report template to generate a test report.
Further, the generated test report may be presented in a predetermined report format. By way of example, and not limitation, excel test reports are used. Further, the data may also be presented in the test report by way of graph drawing, by way of example and not limitation, as shown in fig. 4a-4c, specifically, as shown in fig. 4a, an Overall noise-Frequency (Overall Squeals Vs Frequency) diagram; FIG. 4b is a schematic diagram of Temperature-Distance (Temperature Vs Distance-All stops); FIG. 4c is a schematic diagram of Temperature versus Distance (Temperature Vs Distance-Squals) for noise. Furthermore, the content and format of the report template can be freely added according to the requirements of the client.
As a preferred embodiment, the operating condition data includes: ACW data, GPS data, and vehicle bus data; the ACW data at least comprises any one of the disc temperature, the pipeline pressure and the environmental temperature and humidity;
the GPS data includes at least any one of a vehicle speed, an accumulated mileage, and a deceleration.
Further, in the embodiment of the present invention, a plurality of signals, such as Vehicle Bus (Vehicle Bus) data, ACW data, GPS data, etc., required in the whole Vehicle road test process are integrated by the data acquisition card 11 and packaged in the box.
Specifically, on the front interface panel of the data acquisition card 11 packaging box, the method includes: collecting channel interfaces of FL (front left), FR (front right), RL (rear left) and RR (rear right) respectively collect the temperatures (namely the temperatures of 4 wheel dials of the whole vehicle) in a thermocouple mode; the AMH OUT and AMT OUT acquisition channel interfaces are respectively used for acquiring the environment temperature and humidity data outside the vehicle; the collection channel interfaces PRE1 IN and PRE2 IN are respectively used for collecting pipeline pressure data; the temperature and humidity sensor comprises a collecting channel interface for collecting environmental temperature and humidity data in the vehicle; a plurality of 12V OUTPUT interfaces for supplying power to external devices, wherein the external devices include but are not limited to external cameras, terminal devices and the like; and the equipment switch button is used for controlling the on-off state of the equipment.
Specifically, on the rear interface panel of the data acquisition card 11 packaging box, the method includes: the interface of the 12V INPUT is used for supplying power to the equipment; the interface of CAN OUTPUT is used for connecting a vehicle; and other reserved interfaces for subsequent expansion of functionality.
The interfaces can be adaptively added or deleted according to actual road test requirements.
In the preferred embodiment, the data acquisition card 11 is connected to the data acquisition system 12 through a triple interface.
Specifically, in the embodiment of the present invention, after a plurality of signals, such as Vehicle Bus (Vehicle Bus) data, ACW data, GPS data, etc., required in the whole Vehicle road test process are integrated and encapsulated in a box by a data acquisition card 11, the Vehicle Bus data, ACW data, GPS data, etc., are connected to the CANBUS interface of the existing LMS SCADAS XS device by a three-in-one interface.
Furthermore, the data acquisition card 11 may be configured as one; or a plurality of interfaces can be integrated together to integrate more interfaces for different road test requirements.
In a preferred embodiment, the data acquisition system 12 is an LMS SCADAS XS device. The LMS SCADASXS equipment and the vehicle-mounted equipment are directly connected through NVH channels, NVH data collection is achieved, and the number of the NVH channels reaches 14.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A whole vehicle road test braking noise data analysis device, characterized by comprising:
a data acquisition module for recording the required test data of whole car road test when satisfying a preset trigger condition, data acquisition module includes:
the data acquisition card is integrally packaged with a plurality of first acquisition channels and is used for acquiring working condition data in the whole vehicle road test process;
the data acquisition system is connected with the data acquisition card, is provided with a second acquisition channel of NVH data and is used for summarizing the acquired NVH data and the received working condition data to obtain the test data;
a data analysis module connected to the data acquisition module, the data analysis module comprising:
the preprocessing unit is used for preprocessing the test data;
and the analysis unit is connected with the preprocessing unit and used for analyzing the preprocessed test data to obtain the corresponding test data when the brake noise occurs in the whole vehicle road test process.
2. The vehicle road test brake noise data analysis device according to claim 1, wherein the preset trigger condition is that the brake pressure of the whole vehicle exceeds a preset threshold.
3. The apparatus of claim 1, wherein the data collection module comprises:
and the recording unit is used for recording the test data corresponding to the current moment under the control of an external input signal and storing the test data.
4. The apparatus of claim 2, wherein the data collection module comprises: and the key unit is used for outputting the external input signal after being pressed by a tester when the brake noise occurs.
5. The entire road test braking noise data analysis device according to claim 1, wherein the analysis unit includes:
and the noise identification subunit is used for identifying whether the brake noise occurs according to the test data, outputting the corresponding test data when the brake noise occurs, and storing the test data.
6. The apparatus for analyzing noise data during a full vehicle road test brake according to claim 1, wherein the data analysis module further comprises: and the report generating unit is connected with the analyzing unit and used for generating and outputting a test report according to the test data output by the analyzing unit.
7. The apparatus of claim 5, wherein the data analysis module further comprises:
the template configuration unit is preset with a plurality of report templates and is used for generating the report templates in a self-defined mode or generating new report templates after the preset report templates are configured;
the report generating unit is connected with the template configuration unit and used for processing the test data according to the report template to generate the test report.
8. The apparatus for analyzing whole vehicle road test braking noise data according to claim 1, wherein the operating condition data includes: ACW data, GPS data, and vehicle bus data; the ACW data at least comprises any one of a disc temperature, a pipeline pressure and an environment temperature and humidity;
the GPS data at least comprises any one of vehicle speed, accumulated mileage and deceleration.
9. The apparatus of claim 1, wherein the data acquisition card is connected to the data acquisition system via a three-in-one interface.
10. The vehicle road test brake noise data analysis device according to claim 1, wherein the data acquisition system is a LMS SCADAS XS device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211296456.8A CN115655742A (en) | 2022-10-21 | 2022-10-21 | Whole car road test braking noise data analysis equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211296456.8A CN115655742A (en) | 2022-10-21 | 2022-10-21 | Whole car road test braking noise data analysis equipment |
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| CN115655742A true CN115655742A (en) | 2023-01-31 |
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| CN202211296456.8A Pending CN115655742A (en) | 2022-10-21 | 2022-10-21 | Whole car road test braking noise data analysis equipment |
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