CN107239067A - Vehicle different sound diagnostic device and diagnostic method based on mobile intelligent terminal - Google Patents
Vehicle different sound diagnostic device and diagnostic method based on mobile intelligent terminal Download PDFInfo
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- CN107239067A CN107239067A CN201610184208.2A CN201610184208A CN107239067A CN 107239067 A CN107239067 A CN 107239067A CN 201610184208 A CN201610184208 A CN 201610184208A CN 107239067 A CN107239067 A CN 107239067A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0218—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults
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Abstract
The invention discloses a kind of vehicle different sound diagnostic device and diagnostic method based on mobile intelligent terminal：It is characterized in that：Including:Mobile intelligent terminal, abnormal sound detection APP, abnormal sound harvester, cloud server, abnormal sound database；Abnormal sound harvester includes：Jaw type abnormal sound harvester, magnetic abnormal sound harvester, hand-held abnormal sound harvester.Harvester connects abnormal sound source by magnetic adsorption type or clamp or the direct way of contact, obtain noise reduction and complete the collection to vehicle noise reduction and digitized processing, and be connected using mobile intelligent terminals such as mobile phone or tablet personal computers by bluetooth with abnormal sound harvester, the digitized noise reduction exports noise reduction by the receiver of mobile intelligent terminal, and is graphically shown on the screen of mobile intelligent terminal.Cloud server is uploaded by the mobile network of mobile intelligent terminal simultaneously, cloud server will determine that result feeds back to mobile intelligent terminal by noise reduction com-parison and analysis, judging whether Abnormal Sound Trouble.
Description
Technical field
The invention belongs to after automobile market diagnose detection field, and in particular to be a kind of vehicle different sound diagnostic device and diagnostic method based on mobile intelligent terminal.
Background technology
Current vehicle different sound fault diagnosis is the problem of maintenance technician often faces, the working experience by maintenance technician is needed for during diagnosis at present, although at present can also be by instruments such as auxiliary electron stethoscopes, noise reduction is collected into transmission and played, but finally need for the ear of maintenance technician to be identified and judge Abnormal Sound Trouble, the assembling of especially present vehicle is closely, current abnormal sound detection device is difficult that good noise reduction is in close contact and obtained with abnormal sound position, especially in vehicle traveling process, this will become more difficult, to help quick and precisely to obtain noise reduction and can interpolate that and analyze Abnormal Sound Trouble, the artificial empirical analysis for judging and relying on maintenance personal is reduced to judge, effective collection can't be particularly carried out to noise reduction at present, storage, analysis, study etc., therefore need to invent a kind of device, the device not only can accurately facilitate collection noise reduction, it can also store, analysis, figure shows, maintenance technician's analysis is helped to judge Abnormal Sound Trouble, abnormal sound accuracy of judgement degree can so be improved, reduce and rely on artificial experience, improve the operating efficiency of vehicle different sound fault diagnosis.
The content of the invention
It is an object of the invention to provide planting a kind of vehicle different sound diagnostic acquisition device and diagnostic method based on mobile intelligent terminal to help repair technician to realize and quick and precisely obtain noise reduction and vehicle different sound failure can be diagnosed, reduce artificial analysis and judge.The abnormal sound diagnostic device obtains noise reduction using noise reduction harvester is by magnetic adsorption type or clamp or directly contacts different mode and connects abnormal sound source；Complete the collection to vehicle noise reduction and digitized processing, and be connected using mobile intelligent terminals such as mobile phone or tablet personal computers by bluetooth with abnormal sound harvester, the digitized noise reduction exports noise reduction by the receiver of mobile intelligent terminal, and is graphically shown on the screen of mobile intelligent terminal.Cloud server is uploaded by the mobile network of mobile intelligent terminal simultaneously, cloud server will determine that result feeds back to mobile intelligent terminal by noise reduction com-parison and analysis, judging whether Abnormal Sound Trouble.
The purpose of the present invention is achieved through the following technical solutions.A kind of vehicle different sound diagnostic device and diagnostic method based on mobile intelligent terminal：It is characterized in that：Including:Mobile intelligent terminal, abnormal sound detection APP, abnormal sound harvester, cloud server, abnormal sound database；Abnormal sound harvester includes：Jaw type abnormal sound harvester, magnetic abnormal sound harvester, hand-held abnormal sound harvester.
The intelligent terminal is by recognizing that vehicle VIN codes are connected with cloud server, for signing in cloud server；It is connected by bluetooth with abnormal sound harvester, for receiving noise reduction.
Described abnormal sound harvester includes：Vibrating sensor, op-amp, Bluetooth chip, power control circuit, button, indicator lamp.Abnormal sound harvester passes through Bluetooth chip and mobile intelligent terminal wireless connection, abnormal sound harvester can be independent pass through the clamp of jaw type abnormal sound harvester respectively, magnetic abnormal sound harvester magnetic absorption, the mode that hand-held abnormal sound harvester is directly connected to is connected acquisition noise reduction with abnormal sound source；
Described abnormal sound harvester has three kinds of modes to be connected with abnormal sound source：The first is jaw type abnormal sound harvester, and second is magnetic abnormal sound harvester, and the third is hand-held abnormal sound harvester；
Described jaw type abnormal sound harvester includes：Clamp, vibrating sensor, op-amp, Bluetooth chip, power control circuit, button, indicator lamp.
Described magnetic abnormal sound harvester includes：Magnet, vibrating sensor, op-amp, Bluetooth chip, power control circuit, button, indicator lamp.
Described hand-held abnormal sound collection includes：Handle, flexible conduit, vibrating sensor, op-amp, Bluetooth chip, power control circuit, button, indicator lamp.
Described Bluetooth chip is model cc2541, its integrated 8051 single-chip microcomputer and bluetooth communication.
The automobile cloud server is connected to corresponding intelligent terminal by mobile network, receives the noise reduction for coming from abnormal sound harvester, and above-mentioned noise reduction is stored, and retrieves, analyzes；Preferably, the cloud server includes a database, and the database is used to store and enquiring vehicle information.
In addition, present invention also offers a kind of vehicle different sound diagnostic method based on mobile intelligent terminal, including step：
Step 1：Mobile intelligent terminal obtains test information of vehicles by inputting or scanning vehicle VIN codes；
Step 2：Determine after vehicle, input distance travelled, test position, engine speed and speed information
Step 3：The abnormal sound source at least choosing a kind of abnormal sound harvester and tested vehicle is connected
Step 4：By the clamp of jaw type abnormal sound harvester, magnetic abnormal sound harvester magnetic absorption, the mode that hand-held abnormal sound harvester is directly connected to is connected acquisition noise reduction with abnormal sound source；
Step 5：Mobile intelligent terminal obtains at least noise reduction all the way by abnormal sound harvester；
Step 6：Mobile intelligent terminal obtains noise reduction and exports the noise reduction chart display noise reduction on screen simultaneously by receiver；
Step 7：Noise reduction is passed through mobile network's synchronized upload to cloud server by mobile intelligent terminal.Judge Abnormal Sound Trouble by the two kinds of methods in mobile terminal and server；
Step 8：Judge Abnormal Sound Trouble in mobile terminal：If transmission of one line noise reduction can judge Abnormal Sound Trouble by receiver and contrast noise reduction chart variation；If the similarities and differences that two tunnel above signals of transmission can compare two tunnel above signals by the chart of receiver and noise reduction judge Abnormal Sound Trouble；
Step 9：Server judges Abnormal Sound Trouble beyond the clouds：Cloud server inquires about stored same vehicle with noise reduction of the mileage number with position, and Abnormal Sound Trouble is judged with the noise reduction comparative analysis that newly receives；
Compared with prior art, beneficial effect is the present invention：The screen and interlock circuit of abnormal sound harvester are reduced using the integrated functionality of the powerful hardware capability of mobile intelligent terminal and systemic-function, and cc2541 chips, hardware cost is greatly reduced, using the storage of cloud server, analysis completes the diagnosis of abnormal sound；Analysis by mobile intelligent terminal systemic-function to the noise reduction of storage simultaneously, study improves the degree of accuracy of abnormal sound diagnosis, reduces artificial erroneous judgement and greatly meets to automobile vehicle different sound fault diagnosis, quick and precisely judges the demand of Abnormal Sound Trouble.
Brief description of the drawings
The purpose of the present invention, feature and beneficial effect will combine the detailed description of embodiment, be further illustrated with reference to accompanying drawing.
In accompanying drawing.
Fig. 1 is the structure principle chart of the present invention
Fig. 2 is the abnormal sound harvester hardware block diagram of the present invention
Fig. 3 is real abnormal sound detection APP software flow patterns of the invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with drawings and Examples, the present invention will be described in further detail.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
Refer to structure principle charts of the Fig. 1 for the present invention；
Mobile intelligent terminal vehicle different sound diagnostic acquisition device and diagnostic method are based on the present invention is to provide one kind, its collection for being mainly used in solving noise reduction and the diagnostic analysis of noise reduction, help maintenance technician quick and precisely to obtain noise reduction to realize and vehicle different sound failure can be diagnosed, reduce artificial analysis and judge.
The abnormal sound harvester of present invention contact abnormal sound source by magnetic adsorption type or clamp or directly, obtain collection of the noise reduction completion to vehicle noise reduction, and be connected by mobile intelligent terminals such as mobile phone or tablet personal computers by bluetooth with abnormal sound harvester, abnormal sound letter transmits noise reduction by the receiver of mobile intelligent terminal, and the mode of chart is shown on the screen of mobile intelligent terminal.Cloud server is uploaded by the mobile network of mobile intelligent terminal simultaneously, cloud server will determine that result feeds back to mobile intelligent terminal by noise reduction com-parison and analysis, judging whether Abnormal Sound Trouble.
Wherein the present invention includes：Mobile intelligent terminal, abnormal sound harvester, cloud server, abnormal sound database；Abnormal sound harvester includes：Jaw type abnormal sound harvester, magnetic abnormal sound harvester, hand-held abnormal sound harvester.
Described mobile network's terminal is the smart mobile phone or tablet personal computer using IOS and android4.0 as operating system, mobile network's terminal is connected by itself bluetooth with abnormal sound harvester Bluetooth chip wireless telecommunications, for obtaining noise reduction, and be connected by mobile network with cloud server, for noise reduction is uploaded into cloud server.
Refer to abnormal sound harvester hardware block diagrams of the Fig. 2 for the present invention
Described abnormal sound harvester is connected acquisition noise reduction by the abnormal sound source with vehicle, and the noise reduction operation amplifier circuit processing is formed into digital noise reduction, abnormal sound harvester is connected by bluetooth with mobile network's terminal, and the noise reduction after processing is transferred into mobile network's terminal.
Described abnormal sound harvester has three kinds of signal acquisition modes：Including jaw type abnormal sound harvester, magnetic abnormal sound harvester, hand-held abnormal sound harvester.
Described jaw type abnormal sound harvester includes：Clamp, vibrating sensor, operation amplifier electricity, Bluetooth chip, power control circuit, button, indicator lamp.
The clamp front end is clipped in the mechanical structure connection for producing abnormal sound, obtain abnormal sound vibration signal, rear end is closely connected with vibrating sensor, abnormal sound vibration signal is transferred to vibrating sensor, vibration signal is become electric signal by abnormal sound sensor, it is sent to operation amplifier circuit, operation amplifier circuit amplifies ultra-weak electronic signal, and filter off unnecessary noise signal, and it is transferred to Bluetooth chip, Bluetooth chip is by the signal, through Bluetooth transmission to mobile intelligent terminal, mobile intelligent terminal transmits the signal to receiver or earphone is played, the signal is transferred to cloud server through mobile network simultaneously, complete noise reduction collection.
Described magnetic abnormal sound harvester includes：Magnet, vibrating sensor, op-amp, Bluetooth chip, power control circuit, button, indicator lamp.
Described magnet is connected guarantee vibrating sensor with abnormal sound source magnetic by magnetic and is closely connected with abnormal sound source, obtain abnormal sound vibration signal, abnormal sound vibration signal is transferred to vibrating sensor, vibration signal is become electric signal by abnormal sound sensor, it is sent to operation amplifier circuit, operation amplifier circuit amplifies ultra-weak electronic signal, and filter off unnecessary noise signal, and it is transferred to Bluetooth chip, Bluetooth chip is by the signal, through Bluetooth transmission to mobile intelligent terminal, mobile intelligent terminal transmits the signal to receiver or earphone is played, the signal is transferred to cloud server through mobile network simultaneously, complete noise reduction collection.
Described hand-held abnormal sound collection includes：Flexible conduit, vibrating sensor, op-amp, Bluetooth chip, power control circuit, button, indicator lamp.
Described flexible conduit front end is installed by vibrating sensor, flexible conduit can arbitrarily be bent, vibrating sensor is allowd to connect the abnormal sound source of hidden small space, directly contacted with abnormal sound source, obtain abnormal sound vibration signal, vibration signal is become electric signal by abnormal sound sensor, it is sent to operation amplifier circuit, operation amplifier circuit amplifies ultra-weak electronic signal, and filter off unnecessary noise signal, and it is transferred to Bluetooth chip, Bluetooth chip is by the signal, through Bluetooth transmission to mobile intelligent terminal, mobile intelligent terminal transmits the signal to receiver or earphone is played, the signal is transferred to cloud server through mobile network simultaneously, complete noise reduction collection.
Described Bluetooth chip is cc2541, and it is a microcontroller core of high-performance low-power-consumption 8051 with command function, while integrated bluetooth communication.
Include abnormal sound database in the cloud server, the database is used to store history noise reduction data, and with car system, vehicle, year money, discharge capacity, mileage, rotating speed, speed, position classification storage noise reduction retrieved, analyzed.
Above is the explanation of the system to abnormal sound diagnostic device of the present invention, the method diagnosed below in conjunction with 3 couples of present invention of accompanying drawing by real-time performance vehicle different sound is further described.
It is abnormal sound detection App software flow patterns of the present invention to refer to Fig. 3：
Present invention also offers a kind of vehicle different sound diagnostic method based on mobile intelligent terminal, including step：
Step 1：Mobile intelligent terminal obtains test information of vehicles by inputting or scanning vehicle VIN codes；
Carrying out before abnormal sound is diagnosed it needs to be determined that the Back ground Information of test vehicle, present invention exact p-value information of vehicles by the way of inputting or scanning VIN codes, information of vehicles includes：Car system, shaping, discharge capacity, year money etc., the VIN that surface sweeping VIN codes can be with surface sweeping vehicle driving license and positioned at vehicle driver side windshield lower left corner side.
Step 2：Determine after vehicle, input distance travelled, test position, engine speed and speed information
The distance travelled number of input vehicle is needed before test.Actual read number of the distance travelled number of vehicle from the milestone table of vehicle, test position refers to the link position of abnormal sound harvester and vehicle, the rotating speed of engine refers to the rotating speed specified when engine idling and test, rotating speed refers to the actual read number of revolution counter, when detecting the Abnormal Sound Trouble of vehicle travel process, need to input vehicle actual vehicle speed, speed is the actual read number of vehicle speed table.
Step 3：The abnormal sound source at least choosing a kind of abnormal sound harvester and tested vehicle is connected
The present invention has three kinds of abnormal sound harvesters according to the difference of connected mode, jaw type abnormal sound harvester, magnetic abnormal sound harvester, hand-held abnormal sound harvester, in vehicle stationary, the preferred hand-held abnormal sound harvester of machine testing Abnormal Sound Trouble is started in startup, it is easy to directly contact the abnormal sound source of engine, can be arbitrarily bent for the hand-held abnormal sound detection means flexible conduit of some concealed locations, be easy to contact with test position, jaw type abnormal sound harvester, magnetic abnormal sound harvester can also be selected；Jaw type harvester clamps test position by clamp, and magnetic abnormal sound detection means is by the suction adsorption of magnet in test position.If detecting the Abnormal Sound Trouble of automobile in the process of moving, jaw type abnormal sound harvester, magnetic abnormal sound harvester can be selected according to the preliminary position for suspecting abnormal sound source；Jaw type harvester clamps test position by clamp, and magnetic abnormal sound detection means is by the suction adsorption of magnet in test position.
Step 4：By the clamp of jaw type abnormal sound harvester, magnetic abnormal sound harvester magnetic absorption, the mode that hand-held abnormal sound harvester is directly connected to is connected acquisition noise reduction with abnormal sound source；
In vehicle traveling process, the place that especially the not easy-to-use eyes such as chassis can see, mechanical part with abnormal sound source by the way of magnetic or clamp is connected, six groups of magnetic pick-up devices can be configured, obtain six road noise reductions, in the case where automobile is not travelled, simply start the engine diagnostic Abnormal Sound Trouble related to engine, noise reduction is typically obtained using hand-held abnormal sound harvester；Can also three kinds of abnormal sound harvesters be used in any combination.
Step 5：Mobile intelligent terminal obtains at least noise reduction all the way by abnormal sound harvester；
Mobile intelligent terminal can obtain six road noise reductions, jaw type abnormal sound harvester can be used respectively by obtaining signal all the way, magnetic abnormal sound harvester, any one abnormal sound harvester of hand-held abnormal sound harvester, obtain position and the convenience of connection that two tunnel above noise reductions can be according to abnormal sound source, by jaw type abnormal sound harvester, magnetic abnormal sound harvester, any combination of three kinds of hand-held abnormal sound harvester.To obtain two tunnels, three tunnels, four tunnels, five tunnels, six road abnormal sound letters.
Step 6：Mobile intelligent terminal obtains noise reduction and exports the noise reduction chart display noise reduction on screen simultaneously by receiver；
Noise reduction exports abnormal sound sound by itself have earphone or the receiver of mobile intelligent terminal, and the strong or weak relation of the noise reduction is with curve map and block diagram output display on the screen of mobile intelligent terminal.Two tunnel above noise reductions are at least shown by screen, signal shows that more by force the abnormal sound position broken down will be closer to abnormal sound harvester junction, and the abnormal sound sent by earphone or receiver will indicate that the abnormal sound position broken down will be closer to abnormal sound harvester junction.
Step 7：Noise reduction is passed through mobile network's synchronized upload to cloud server by mobile intelligent terminal.Judge Abnormal Sound Trouble by the two kinds of methods in mobile terminal and server
Mobile intelligent terminal will at least collect noise reduction all the way and be transferred to cloud server by mobile network, and noise reduction is stored in database.
Step 8：Judge Abnormal Sound Trouble in mobile terminal：If transmission of one line noise reduction can judge Abnormal Sound Trouble by receiver and contrast noise reduction chart variation；If the similarities and differences that two tunnel above signals of transmission can compare two tunnel above signals by the chart of receiver and noise reduction judge Abnormal Sound Trouble；
The noise reduction obtained by mobile intelligent terminal, noise reduction is played by the receiver of mobile terminal simultaneously, chart shows noise reduction on the screen of mobile terminal simultaneously, if it is that noise reduction can be analyzed and be rung by receiver signal diagrams change and judge Abnormal Sound Trouble all the way to obtain, if two tunnel above signals can compare the similarities and differences of two road signals by receiver and the chart of noise reduction compares the similarities and differences of two tunnel above signals and judges Abnormal Sound Trouble if transmission is transmitted；
Step 9：Server judges Abnormal Sound Trouble beyond the clouds：Cloud server inquires about stored same vehicle with noise reduction of the mileage number with position, and Abnormal Sound Trouble is judged with the noise reduction comparative analysis that newly receives；
The information of vehicles that cloud server will be determined by VIN codes, will be according to car system, vehicle, year money, discharge capacity etc. stores noise reduction, the distance travelled inputted simultaneously according to test process, rotating speed, speed, position classification storage noise reduction, when cloud server receives new noise reduction, the noise reduction is first stored first, while according to car system, vehicle, year money, discharge capacity, distance travelled, rotating speed, whether speed, the classified inquiry server such as position is stored with the noise reduction of the classification, and judges noise reduction with the noise reduction comparative analysis that newly receives.
Step 10：Cloud server will determine that analysis result, feed back to mobile intelligent terminal.
Cloud server will be according to car system, vehicle, year money, the Query Result if do not found, feeds back to mobile intelligent terminal, if inquired, will analyzed, comparative result feeds back to mobile intelligent terminal by discharge capacity, distance travelled, rotating speed, speed, position enquiring.
The present invention greatly meets the collection of noise reduction, stores, the function such as analysis, improves the quick of abnormal sound diagnosis, accurately improves efficiency.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the invention etc., should be included in the scope of the protection.
Claims (5)
1. a kind of vehicle different sound diagnostic device based on mobile intelligent terminal：It is characterized in that：Including:Mobile intelligent terminal, abnormal sound detection APP, abnormal sound harvester, cloud server, abnormal sound database；Abnormal sound harvester includes：Jaw type abnormal sound harvester, magnetic abnormal sound harvester, hand-held abnormal sound harvester；
The intelligent terminal is by recognizing that vehicle VIN codes are connected with cloud server, for signing in cloud server；
Described mobile intelligent terminal is connected by Bluetooth chip with abnormal sound harvester, for receiving noise reduction；
Described abnormal sound harvester includes：Vibrating sensor, op-amp, Bluetooth chip, power control circuit, button, indicator lamp.
2. described in abnormal sound harvester by Bluetooth chip and mobile intelligent terminal wireless connection,
The jaw type abnormal sound harvester is clamped by clamp and the parts in abnormal sound source is connected acquisition noise reduction
The magnetic abnormal sound harvester is connected acquisition noise reduction with the parts magnetic absorption in abnormal sound source by magnet,
The mode of the connection of the hand-held abnormal sound harvester flexible obtains noise reduction with being directly connected with abnormal sound source parts.
3. the abnormal sound harvester according to claim 1, it is characterized in that there is three kinds of connected modes to include：Jaw type abnormal sound harvester, magnetic abnormal sound harvester, hand-held abnormal sound harvester；
The cloud server according to claim 1, it is characterized in that comprising a database, for storing and enquiring vehicle information.
4. the cloud server according to claim 1, it is characterized in that including an abnormal sound database
A kind of vehicle different sound diagnostic method that APP is detected based on mobile intelligent terminal abnormal sound, including step：
Step 1：Mobile intelligent terminal obtains test information of vehicles by inputting or scanning vehicle VIN codes；
Step 2：Determine after vehicle, input distance travelled, test position, engine speed and speed information
Step 3：The abnormal sound source at least choosing a kind of abnormal sound harvester and tested vehicle is connected
Step 4：By the clamp of jaw type abnormal sound harvester, magnetic abnormal sound harvester magnetic absorption, the mode that hand-held abnormal sound harvester is directly connected to is connected acquisition noise reduction with abnormal sound source；
Step 5：Mobile intelligent terminal obtains at least noise reduction all the way by abnormal sound harvester；
Step 6：Mobile intelligent terminal obtains noise reduction and exports noise reduction by receiver, while chart shows noise reduction on screen；
Step 7：Noise reduction is passed through mobile network's synchronized upload to cloud server by mobile intelligent terminal.
5. judge Abnormal Sound Trouble by the two kinds of methods in mobile terminal and server
Step 8：Judge Abnormal Sound Trouble in mobile terminal：If transmission of one line noise reduction can judge Abnormal Sound Trouble by receiver and contrast noise reduction chart variation；If the similarities and differences that two tunnel above signals of transmission can compare two tunnel above signals by the chart of receiver and noise reduction judge Abnormal Sound Trouble；
Step 9：Server judges Abnormal Sound Trouble beyond the clouds：Cloud server inquires about stored same vehicle with noise reduction of the mileage number with position, and Abnormal Sound Trouble is judged with the noise reduction comparative analysis that newly receives；
Step 10：Cloud server will determine that analysis result, feed back to mobile intelligent terminal.
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| CN111307274A (en) * | 2018-12-12 | 2020-06-19 | 现代自动车株式会社 | Method and device for diagnosing problem noise source based on big data information |
| CN114354199A (en) * | 2021-12-13 | 2022-04-15 | 贵阳学院 | Abnormal sound diagnosis method for engine valve mechanism |
| CN114486289A (en) * | 2022-02-14 | 2022-05-13 | 重庆金康赛力斯新能源汽车设计院有限公司 | Method and device for testing abnormal sound of whole vehicle, storage medium and vehicle-mounted terminal |
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| CN114486289A (en) * | 2022-02-14 | 2022-05-13 | 重庆金康赛力斯新能源汽车设计院有限公司 | Method and device for testing abnormal sound of whole vehicle, storage medium and vehicle-mounted terminal |
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