CN203011695U - Intelligent stethoscope for automobile engine faults - Google Patents
Intelligent stethoscope for automobile engine faults Download PDFInfo
- Publication number
- CN203011695U CN203011695U CN 201220601740 CN201220601740U CN203011695U CN 203011695 U CN203011695 U CN 203011695U CN 201220601740 CN201220601740 CN 201220601740 CN 201220601740 U CN201220601740 U CN 201220601740U CN 203011695 U CN203011695 U CN 203011695U
- Authority
- CN
- China
- Prior art keywords
- signal
- motor car
- engine
- module
- car engine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Testing Of Engines (AREA)
Abstract
The utility model discloses an intelligent stethoscope for automobile engine faults, comprising a computer, a signal acquisition circuit and an audio signal acquisition head, wherein the computer is connected with the audio signal acquisition head via the signal acquisition circuit. According to technical scheme of the utility model, in an engine fault diagnosis method based on sound waves of an automobile engine, problems of relatively low completeness and accuracy of fault diagnosis due to limited experience of maintenance staff can be overcome; lots of sound waves of automobile engine faults are stored in the computer, and are compared and analyzed, and complete and highly-accurate fault diagnosis result is automatically provided; and structure of the intelligent stethoscope is simple, and operation and use of the same are very convenient.
Description
Technical field
The utility model relates to a kind of equipment fault diagnosis device, relates in particular to a kind of EDPAC Engine Diagnostic Package based on the audio frequency sound analysis for automobile.
Background technology
Engine is as the core component of automobile, and the diagnosis of its fault is also just seemed particularly important in automobile failure diagnosis.In automobile engine failure diagnosis, the veteran maintenance technician of auto repair just can judge the quality of engine by the sound of detection motor car engine under different rotating speeds, and the failure cause of motor car engine and in-scope.This method of diagnosing the motor car engine fault by the sound under the different operation conditionss of motor car engine has advantages of simple, easy row.But this diagnostic method needs the fault diagnosis personnel could realize by the accumulation of automobile engine failure diagnosis experience for many years, and needs the fault diagnosis personnel to possess audio frequency hearing preferably.
Open day be that patent documentation that May 24, publication number in 2006 are CN2783300Y discloses the technical scheme that name is called a kind of fault detector for car engine, it comprises that stethoscopic bi-telephone, an end are connected with the stethoscope earphone, the sebific duct that its other end is connected with the sound chamber, with sound chamber and the probe of vibrating plate, also comprise volume adjusting switch and the contact that is spirally connected with probe front.The maintenance personal wears stethoscope motor car engine is carried out fault diagnosis.The weak point of this technical scheme is, still depends on the maintenance personal to the service experience of engine during to the motor car engine diagnosing malfunction, has just reduced engine diagnosis personnel's audio frequency hearing requirement, and the accuracy of fault diagnosis is relatively poor.
Summary of the invention
The utility model is mainly to solve the technical matterss such as the service experience that places one's entire reliance upon maintenance personal's experience when prior art is existing carries out engine diagnosis based on the motor car engine audio frequency and occur is limited, fault diagnosis is comprehensive, poor accuracy, a kind of motor car engine intelligent fault auscultation instrument is provided, it can carry out the datumization analysis to the audio frequency sound that produces in the motor car engine operational process, thereby fault is made accurate judgement.
The utility model is mainly solved by following technical proposals for the prior art problem, a kind of motor car engine intelligent fault auscultation instrument, comprise computing machine, signal acquisition circuit and audio signal sample head, computing machine connects the audio signal sample head by signal acquisition circuit.in scheme, computing machine be used for providing motor car engine intelligent fault auscultation instrument man-machine interface, bear the automobile engine failure diagnosis running software, signal acquisition circuit is used for completing the signal conversion between computing machine and audio signal sample head, and the signals collecting head is the audio frequency sound that produces when gathering the motor car engine operation, and the engine audio frequency sound that collects is inputed to the form of voltage analog signal the amplification that signal amplification module in signal acquisition circuit carries out signal process, voltage analog signal after amplifying is delivered to the signal condition module and is carried out delivering to computing machine after conversion process, the audio frequency sound that in computing machine, motor car engine is produced is analyzed, thereby the fault to motor car engine is made diagnosis.Various audio volume controls owing to can store a large amount of motor car engine faults in computing machine the time can provide integrality (comprehensively), fault diagnosis result that accuracy is high after through comparison, analyzing and processing to the audio frequency sound that detects.
As preferably, signal acquisition circuit comprises AC/DC power module, DC/DC power module, signal condition module and signal amplification module, AC/DC power module input end connects external ac power source, output terminal connects DC/DC power module input end, DC/DC power module output voltage is as working power VCC, the output terminal of signal condition module connects computing machine, input end connects signal amplification module output signal, and the input end of signal amplification module connects the audio signal sample head.AC/DC power module and DC/DC power module are the alternating current of 220V to be converted to the dc supply VCC of signal condition module and signal amplification module and audio signal sample head needs; After the signal amplification module amplifies processing with the weak signal of audio signal sample head output, then be that the data message that computing machine can receive is delivered to the computing machine processing by the signal condition module converts.
As preferably, the audio signal sample head is audio sensor.Adopt audio sensor to press close to the collection that motor car engine is completed audio frequency sound.
As preferably, audio sensor is fixed on expansion link.The privileged site that the convenient operation audio sensor is pressed close to motor car engine carries out the audio frequency sound collection.
As preferably, the signal condition module is the A/D modular converter.The function of signal condition module is audio sensor signal after realize amplifying and the interface of computing machine.Therefore, can adopt the A/D modular converter with A/D converter and accessory circuit thereof to realize.The A/D modular converter can adopt bus interface modes or serial interface mode to be connected with computing machine as required.
The beneficial effect that the utility model brings is, motor car engine intelligent fault auscultation instrument with motor car engine audio frequency sound analytic function, solved in the Fault Diagnosis of Engine based on the motor car engine audio frequency sound, the fault diagnosis integrality that occurs because maintenance personal's experience is limited and the relatively poor problem of accuracy, audio volume control when using a large amount of motor car engine fault of storing in computing machine is compared, is analyzed, automatically provide integrality, fault diagnosis result that accuracy is high, apparatus structure is simple, operates, uses all very convenient.
Description of drawings
Fig. 1 is a kind of theory diagram of the present utility model;
Fig. 2 is a kind of diagnostic flow chart of the present utility model;
Fig. 3 is a kind of power-frequency oscillogram of engine audio frequency sound.
In figure: the 1st, computing machine, the 2nd, signal acquisition circuit, the 3rd, audio signal sample head, the 21st, AC/DC power module, the 22nd, DC/DC power module, the 23rd, signal condition module, the 24th, signal amplification module.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is further described in detail.
Embodiment: as shown in Figure 1, the utility model is a kind of motor car engine intelligent fault auscultation instrument.Computing machine 1 connects signal acquisition circuit 2, and audio signal sample head 3 connects signal acquisition circuit 2.Wherein, audio signal sample head 3 is audio sensors (common microphone) and is arranged on expansion link; Signal acquisition circuit is made of AC/DC power module 21, DC/DC power module 22, signal condition module 23 and signal amplification module 24, and signal condition module 23 is A/D modular converters, and adopts bus interface modes; AC/DC power module 21 is supplied with DC/DC power module 22 after city's voltage alternating current 220V is converted to certain DC voltage, and the DC voltage of 22 pairs of inputs of DC/DC power module outputs to signal condition module 23, signal amplification module 24 and audio signal sample head 3 as working power VCC after the voltage stabilizing conversion further.
Fig. 2 is diagnostic flow chart.To the motor car engine diagnosing malfunction time, at first to guarantee to store by the automotive type of Diagnosis on Engine in computing machine 1, and the standard signal oscillogram file of corresponding engine ad-hoc location.If do not store by the automotive type of Diagnosis on Engine in computing machine 1, and the standard signal oscillogram file of corresponding engine ad-hoc location, need gather the standard signal oscillogram and preserve from trouble-free engine operation process.In the standard signal gatherer process, at first to be gathered by the man-machine interface input of computing machine 1 vehicle, diagnostic position, the standard signal conditional information (as: rotating speed of engine, the position that audio signal sample head 3 is concrete) of car.after starting the standard signal collection, a certain position is motionless on every side to answer holding signal collection head 3 to be in engine, the audio frequency sound that this moment, engine produced is received by audio signal sample head 3, and be converted to voltage analog signal, the signal amplification module 24 that this voltage analog signal is transferred in signal acquisition circuit 2 carries out the amplification processing of voltage analog signal, voltage analog signal after amplifying is sent to again signal condition module 23 and processes, voltage analog signal is converted to digital signal, and be sent to computing machine 1 by data bus and carry out calculation process, save as and specify vehicle at the standard signal oscillogram file of engine position, simultaneously in the standard signal gatherer process, the signal waveform that is gathered will show on the man-machine interface of computing machine 1 in real time.
If store in computing machine 1 by the automotive type of Diagnosis on Engine, and the standard signal oscillogram file of corresponding engine ad-hoc location, can begin being diagnosed the motor car engine diagnosing malfunction, at first select to be gathered vehicle, the diagnostic position of car by the man-machine interface of computing machine 1, and according to " demonstration of signal conditioning information " on computing machine 1 man-machine interface prompting, signals collecting 3 is in a certain position around engine, then begin engine failure is diagnosed.After the starting engine fault diagnosis, answer holding signal collection head 3 motionless, the audio frequency sound that this moment, engine produced is received by audio signal sample head 3, and be converted to voltage analog signal, this voltage analog signal is transferred to the amplification processing that signal amplification module 24 carries out voltage analog signal, voltage analog signal after amplifying is sent to signal condition module 23 and processes, after signal condition module 23 is processed, voltage analog signal is converted to digital signal, and is sent to computing machine 1 by data bus and carries out calculation process.After diagnosis finishes, on the man-machine interface of computing machine 1, manifest simultaneously the oscillogram of standard signal and by the oscillogram of Diagnosis on Engine audio frequency sound in the same coordinate system.By the comparative analysis to two oscillograms, determine failure cause and the position of motor car engine.If need further to being analyzed by the Diagnosis on Engine fault, after diagnose by computing machine 1, the oscillogram of the engine failure audio frequency sound of formation is kept in computing machine 1 in specified folder.
Fig. 3 is the power-frequency oscillogram of audio frequency sound.Reference waveform figure and measured waveform figure show and store with this form.Horizontal ordinate is frequency of sound wave, and ordinate is acoustic power.
Claims (5)
1. motor car engine intelligent fault auscultation instrument, it is characterized in that: comprise computing machine, signal acquisition circuit and audio signal sample head, described computing machine connects the audio signal sample head by signal acquisition circuit.
2. a kind of motor car engine intelligent fault auscultation instrument according to claim 1, it is characterized in that: described signal acquisition circuit comprises the AC/DC power module, the DC/DC power module, signal condition module and signal amplification module, described AC/DC power module input end connects external ac power source, output terminal connects DC/DC power module input end, DC/DC power module output voltage is as working power VCC, the output terminal of signal condition module connects computing machine, input end connects signal amplification module output signal, the input end of signal amplification module connects the audio signal sample head.
3. described a kind of motor car engine intelligent fault auscultation instrument according to claim 1 and 2, it is characterized in that: described audio signal sample head is audio sensor.
4. a kind of motor car engine intelligent fault auscultation instrument according to claim 3, it is characterized in that: described audio sensor is fixed on expansion link.
5. a kind of motor car engine intelligent fault auscultation instrument according to claim 2, it is characterized in that: described signal condition module is the A/D modular converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220601740 CN203011695U (en) | 2012-11-15 | 2012-11-15 | Intelligent stethoscope for automobile engine faults |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220601740 CN203011695U (en) | 2012-11-15 | 2012-11-15 | Intelligent stethoscope for automobile engine faults |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203011695U true CN203011695U (en) | 2013-06-19 |
Family
ID=48603278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220601740 Expired - Fee Related CN203011695U (en) | 2012-11-15 | 2012-11-15 | Intelligent stethoscope for automobile engine faults |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203011695U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107945576A (en) * | 2017-12-25 | 2018-04-20 | 重庆冀繁科技发展有限公司 | Vehicle trouble monitoring method |
| CN110160805A (en) * | 2019-06-11 | 2019-08-23 | 肖慎飞 | The detection device of damaged parts is determined for accident vehicle |
| CN110426121A (en) * | 2019-09-13 | 2019-11-08 | 顺德职业技术学院 | A kind of motor or engine abnormal noise detection device and method |
-
2012
- 2012-11-15 CN CN 201220601740 patent/CN203011695U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107945576A (en) * | 2017-12-25 | 2018-04-20 | 重庆冀繁科技发展有限公司 | Vehicle trouble monitoring method |
| CN110160805A (en) * | 2019-06-11 | 2019-08-23 | 肖慎飞 | The detection device of damaged parts is determined for accident vehicle |
| CN110160805B (en) * | 2019-06-11 | 2024-07-05 | 保翌科技(北京)有限公司 | Detection device for determining damaged parts of accident vehicle |
| CN110426121A (en) * | 2019-09-13 | 2019-11-08 | 顺德职业技术学院 | A kind of motor or engine abnormal noise detection device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101393049B (en) | Vibration monitoring and failure diagnosis method for wind generating set | |
| CN101941623B (en) | Traction machine detection or diagnosis system | |
| CN104554343B (en) | High-speed railway broken rail monitoring system | |
| CN104863839A (en) | Method for detecting abnormal noise of high pressure oil pump of automobile engine | |
| CN104564542B (en) | A kind of fault diagnosis system and its diagnostic method based on big data technology | |
| CN203011695U (en) | Intelligent stethoscope for automobile engine faults | |
| CN205483568U (en) | Engine acoustical signal sampling device and because automobile engine fault detection system of acoustical signal | |
| CN109084997B (en) | Automatic new energy automobile fault detection device and detection method | |
| CN202075392U (en) | Electromotor comprehensive state monitoring system | |
| CN205157637U (en) | Generator carbon brush current distribution monitoring system | |
| CN104880222A (en) | 3G wireless communication-based secondary equipment state monitoring system | |
| CN111628908A (en) | TRDP protocol data acquisition and analysis device and method | |
| CN201628754U (en) | Wideband partial discharge detection device for power equipment | |
| CN104569814A (en) | Approximate entropy-based direct-current traction motor health condition real-time analysis method | |
| CN112904200A (en) | Signal acquisition device based on motor current diagnosis harmonic speed reducer ware trouble | |
| CN110873828A (en) | DC circuit monitoring system for railway passenger vehicle | |
| CN209841180U (en) | Online acoustic signal gathers and marking device | |
| CN203259335U (en) | Combined water pump composite fault diagnosis test apparatus | |
| CN104879294B (en) | A kind of water pump transient signal analytical equipment and method | |
| CN208751705U (en) | A kind of railway air conditioner vibration monitoring and fault diagnosis system | |
| CN202057357U (en) | Integrated test-bed of traction motor | |
| CN203011692U (en) | Portable fault diagnosing device for rolling bearing | |
| CN208383293U (en) | A kind of noise high precision measuring device of high rotation speed servo motor | |
| CN103604605A (en) | Portable swivel bearing fault diagnostic device based on ultrasonic information | |
| CN102636715A (en) | Integrated electrical test comprehensive testing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130619 Termination date: 20171115 |