CN104863839A - Method for detecting abnormal noise of high pressure oil pump of automobile engine - Google Patents
Method for detecting abnormal noise of high pressure oil pump of automobile engine Download PDFInfo
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- CN104863839A CN104863839A CN201410805028.2A CN201410805028A CN104863839A CN 104863839 A CN104863839 A CN 104863839A CN 201410805028 A CN201410805028 A CN 201410805028A CN 104863839 A CN104863839 A CN 104863839A
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Abstract
A method for detecting abnormal noise of the high pressure oil pump of an automobile engine comprises the following steps: collecting sound signals of the high pressure oil pump with an acoustic sensor; converting the sound signals into electrical signals; connecting the acoustic sensor with an amplifier, a filter, an A/D converter and a computer in sequence; magnifying the electrical signals with the amplifier; filtering the magnified signals with the filter; transmitting the filtered signals to the A/D converter for analog-digital conversion; outputting digital signals I to the computer. The computer is used for pre-saving of digital signals II of sound showing that the high pressure oil pump works in a normal state in the computer, receiving the digital signals I obtained through conversion of the A/D converter, and analyzing the digital signals I with the digital signals II, so as to judge whether a sound is abnormal noise or not. Through the adoption of the method, the problem that abnormal noise of the high pressure oil pump of the engine cannot be judged promptly and accurately in the prior art is solved.
Description
Technical field
The present invention relates to technical field of automobile engine, the high pressure oil pump abnormal sound detecting method especially in automobile engine fuel oil system and device.
Background technique
Motor is as the heart of automobile, and its working state decides the normal operation of automobile.Abnormal sound of technical documentation regulation that what motor produced in running exceed, is referred to as abnormal sound.Abnormal sound indicates that some component of motor there occurs fault, if fix a breakdown not in time, may cause larger damage.
Only with regard to the high pressure oil pump in motor, under normal circumstances, because the open and close of needle can send the sound of regular " rattling away ".But sometimes but can send other erratic sound, this just belongs to abnormal sound, if control not in time to become more violent, destroy mechanical component.This abnormal sound due to often cover by engine operation sound, so cannot precisely judge whether high pressure oil pump exists abnormal sound in time.In addition, some personal factors cause cannot Timeliness coverage high pressure oil pump abnormal sound, and such as motor is when stand test runs up, and staff cannot enter each system of test bay monitoring motor and whether there is abnormal sound.
At present, high pressure oil pump occurs that abnormal sound is through people's ear and judges.Because motor does not allow staff to enter in stand test, the motor that there is high pressure oil pump abnormal sound is many to be just found in complete vehicle test.And due to individual difference, everyone it is determined that the presence of certain difference to high pressure oil pump abnormal sound, this not only delays the high pressure oil pump malfunction elimination time, also expends the time and efforts that staff is a large amount of.Simultaneously because fault discovery is incured loss through delay, make more sick engine flow into complete vehicle test, add maintenance difficulty and maintenance cost.
Summary of the invention
For this reason, technical problem to be solved by this invention is the problem that can not judge high-pressure oil pump of engine abnormal sound in time, exactly of the prior art, thus proposes a kind of automobile engine high pressure oil pump abnormal sound detecting method and device.
For solving the problems of the technologies described above, the present invention proposes a kind of automobile engine high pressure oil pump abnormal sound detecting method and comprising the following steps:
With the sound signal of sound transducer collection from high pressure oil pump, sound signal is converted into electrical signal;
Described sound transducer is connected successively with amplifier, wave filter, A/D converter, computer, described electrical signal is transferred to A/D converter after the amplification, filtering process of amplifier, wave filter, described A/D converter carries out analog-to-digital conversion to the electrical signal after process, and output digit signals is to computer;
Described computer runs the digital signal of sound under prestoring high pressure oil pump normal state, and the digital signal received after A/D converter conversion, the normal sound sampled digital signal of this digital signal and prestor is carried out analysing and processing, determines whether abnormal sound with this.
If computer judge that conclusion is as there being abnormal sound, then send fault pre-alarming prompting.
Preferably, also use a pickup device to gather sound signal from high pressure oil pump simultaneously, be connected successively with earphone, acoustic memory by this pickup device, described earphone is used for the operation sound of real-time listening high pressure oil pump, and described acoustic memory stores high pressure oil pump Abnormal Sound source of sound.
When only adopting described sound transducer collected sound signal, described sound transducer is fixed on one on the fixed support of high pressure oil pump placement; When adopting described sound transducer and described pickup device while during collected sound signal, described sound transducer is fixed on together with described pickup device one on the fixed support of high pressure oil pump placement.
Preferably, described fixed support distance high-voltage oil pump is in the scope of 50cm.
Preferably, the described normal sound sampled digital signal by this digital signal and prestor carries out analysing and processing, determines whether that the process of abnormal sound comprises with this:
Digital signal is stored as data stream;
This data stream is cut into the data slot of fixed size;
For each data slot, carry out time-domain related calculation with the sampled digital signal of the normal sound of prestor in computer, and statistical correlation computing peak value;
This related operation peak value and the first peak value preset are compared, if related operation peak value is less than the first default peak value, generates a record mark;
Record mark in one preset time section is added up, if the aggregate-value of described record mark is greater than a predetermined threshold value, shows that the sound of current collection and normal sound signal exist significant difference, be judged as abnormal sound.
The present invention also proposes a kind of automobile engine high pressure oil pump abnormal sound detecting method, comprises the following steps:
Gather the sound signal from high pressure oil pump with first sound sound sensor, the first sound tone signal of acquisition is converted into the first electrical signal;
Gather the sound signal from high pressure oil pump surrounding environment with second sound sound sensor, the second sound signal of acquisition is converted into the second electrical signal;
Described first sound sound sensor is connected successively with the first amplifier, the first wave filter, the first A/D converter, computer, described first electrical signal is transferred to the first A/D converter after the amplification, filtering process of the first amplifier, the first wave filter, described first A/D converter carries out analog-to-digital conversion to the electrical signal after process, exports the first digital signal to computer;
Described second sound sound sensor is connected successively with the second amplifier, the second wave filter, the second A/D converter, described computer, described second electrical signal is transferred to A/D converter after the amplification, filtering process of amplifier, wave filter, described A/D converter carries out analog-to-digital conversion to the electrical signal after process, exports the second digital signal to computer;
Described computer runs the digital signal of sound under prestoring high pressure oil pump normal state, and receive the first digital signal, the second digital signal after first, second A/D converter is changed respectively, the normal sound sampled digital signal of this first digital signal, the second digital signal and prestor is carried out analysing and processing, determines whether abnormal sound with this.
If computer judge that conclusion is as there being abnormal sound, then send fault pre-alarming prompting.
Preferably, also use a pickup device to gather sound signal from high pressure oil pump simultaneously, be connected successively with earphone, acoustic memory by this pickup device, described earphone is used for the operation sound of real-time listening high pressure oil pump, and described acoustic memory stores high pressure oil pump Abnormal Sound source of sound.
When adopting described first sound sound sensor and the second sound sound sensor while during collected sound signal, described first sound sound sensor is fixed on a fixed support placed near high pressure oil pump, described second sound sound sensor is fixed on one and places away from high pressure oil pump and on another fixed support apart from described first sound sound sensor intended distance; When adopting first, second sound transducer described and described pickup device while during collected sound signal, described first sound sound sensor is fixed on together with described pickup device on a fixed support placed near high pressure oil pump, described second sound sound sensor is fixed on one and places away from high pressure oil pump and on another fixed support apart from described first sound sound sensor intended distance.
Preferably, the direction of described first sound sound sensor and described second sound sound sensor collection sound is contrary.
Preferably, described fixed support distance high-voltage oil pump is in the scope of 50cm, and another fixed support distance high-voltage oil pump described is in the scope of 100cm-120cm and apart from described fixed support in the scope of 50cm-70cm.
Preferably, the described normal sound sampled digital signal by this first digital signal, the second digital signal and prestor carries out analysing and processing, determines whether that the process of abnormal sound comprises with this:
Described first digital signal, the second digital signal are stored as the first data stream and the second data stream;
Calculus of differences is done to the first data stream and the second data stream, generates the 3rd data stream;
3rd data stream is cut into the data slot of fixed size;
For each data slot, carry out time-domain related calculation with the sampled digital signal of the normal sound of prestor in computer, and statistical correlation computing peak value;
This related operation peak value and the first peak value preset are compared, if related operation peak value is less than the first default peak value, generates a record mark;
Record mark in one preset time section is added up, if the aggregate-value of described record mark is greater than a predetermined threshold value, shows that the sound of current collection and normal sound signal exist significant difference, be judged as abnormal sound.
The invention provides a kind of automobile engine high pressure oil pump abnormal sound detection device to comprise: sound transducer, amplifier, wave filter, A/D converter, computer; Described sound transducer is connected successively with amplifier, wave filter, A/D converter, computer, and sound signal, for gathering the sound signal from high pressure oil pump, is converted into electrical signal by described sound transducer; Described electrical signal is transferred to A/D converter after the amplification, filtering process of amplifier, wave filter, and described A/D converter carries out analog-to-digital conversion to the electrical signal after process, and output digit signals is to computer;
Described computer runs the digital signal of sound under prestoring high pressure oil pump normal state, and the digital signal received after A/D converter conversion, the normal sound sampled digital signal of this digital signal and prestor is carried out analysing and processing, determines whether abnormal sound with this.
Preferably, also comprise a pickup device, this pickup device gathers the sound signal from high pressure oil pump simultaneously, and this pickup device is connected successively with earphone, acoustic memory, described earphone is used for the operation sound of real-time listening high pressure oil pump, and described acoustic memory stores high pressure oil pump Abnormal Sound source of sound.
Present invention also offers a kind of automobile engine high pressure oil pump abnormal sound detection device, comprising:
First sound sound sensor, for gathering the sound signal from high pressure oil pump, is converted into the first electrical signal by the first sound tone signal of acquisition;
Second sound sound sensor, for gathering the sound signal from high pressure oil pump surrounding environment, is converted into the second electrical signal by the second sound signal of acquisition;
Described first sound sound sensor is connected successively with the first amplifier, the first wave filter, the first A/D converter, computer, described first electrical signal is transferred to the first A/D converter after the amplification, filtering process of the first amplifier, the first wave filter, described first A/D converter carries out analog-to-digital conversion to the electrical signal after process, exports the first digital signal to computer;
Described second sound sound sensor is connected successively with the second amplifier, the second wave filter, the second A/D converter, described computer, described second electrical signal is transferred to A/D converter after the amplification, filtering process of amplifier, wave filter, described A/D converter carries out analog-to-digital conversion to the electrical signal after process, exports the second digital signal to computer;
Described computer runs the digital signal of sound under prestoring high pressure oil pump normal state, and receive the first digital signal, the second digital signal after first, second A/D converter is changed respectively, the normal sound sampled digital signal of this first digital signal, the second digital signal and prestor is carried out analysing and processing, determines whether abnormal sound with this.
Technique scheme of the present invention has the following advantages compared to existing technology:
(1) adopt high pressure oil pump abnormal sound detection device whether can be in normal working by Real-Time Monitoring high pressure oil pump, occur the timely early warning of abnormal sound;
(2) by the sound signal of Real-time Collection compared with the normal operational sound of high pressure oil pump, accurately judge whether high pressure oil pump occurs abnormal sound;
(3) by increasing the sound transducer and corresponding amplification, filtering and A/D change-over circuit that gather ambient noise, the interference that ambient noise detects abnormal sound can be eliminated, improve accuracy in detection.
(4) high pressure oil pump abnormal sound detection device cost low, be convenient to install, highly sensitive, improve abnormal sound detection efficiency, reduce maintenance cost.
Accompanying drawing explanation
In order to make content of the present invention be more likely to be clearly understood, below according to a particular embodiment of the invention and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the structural representation of the automobile engine high pressure oil pump abnormal sound detection device of the embodiment of the present invention 1;
Fig. 2 is the method flow diagram how judging abnormal sound according to the normal sound signal of collection signal and prestor in the embodiment of the present invention 2;
Fig. 3 is the structural representation of the automobile engine high pressure oil pump abnormal sound detection device of the embodiment of the present invention 3;
Fig. 4 is the structural representation of the automobile engine high pressure oil pump abnormal sound detection device of the embodiment of the present invention 5.
In figure, reference character is expressed as: the automobile engine high pressure oil pump abnormal sound detection device of 1-embodiment 1; The automobile engine high pressure oil pump abnormal sound detection device of 2-embodiment 2; The automobile engine high pressure oil pump abnormal sound detection device of 3-embodiment 3; 110,210,310,311-sound transducer; 120,220,320,321-amplifier; 130,230,330,331-wave filter; 140,240,340,341-A/D transducer; 150,250,350-computer; 160,260,360-prior-warning device; 270,370-pickup device; 280,380-earphone
Embodiment
Embodiment 1
Please refer to Fig. 1, Fig. 1 is the structural representation of the automobile engine high pressure oil pump abnormal sound detection device 1 of the embodiment of the present invention 1.
The embodiment of the present invention 1 provides a kind of automobile engine high pressure oil pump detection device 1, this detection device 1 comprises: sound transducer 110, amplifier 120, wave filter 130, A/D converter 140, computer 150 and prior-warning device 160, the output terminal of this sound transducer 110 connects the input end of amplifier 120, the input end that output terminal connects the input end of wave filter 130, the output terminal of wave filter 130 connects A/D converter 140 of amplifier 120, the output terminal of A/D converter 140 connects the input end of computer, and the output terminal of computer connects prior-warning device 160.
Described sound transducer is fixed on one on the fixed support of high pressure oil pump placement, the distance of described fixed support and high pressure oil pump is preferably in the scope of 50cm.Sound signal, for gathering the sound signal from high pressure oil pump, is converted into electrical signal by described sound transducer; Described electrical signal is transferred to A/D converter after the amplification, filtering process of amplifier, wave filter, and described A/D converter carries out analog-to-digital conversion to the electrical signal after process, and output digit signals is to computer.
Described computer runs the digital signal of sound under prestoring high pressure oil pump normal state, and the digital signal received after A/D converter conversion, the normal sound sampled digital signal of this digital signal and prestor is carried out analysing and processing, determines whether abnormal sound with this.
The present embodiment, by measured signal and the contrast of high pressure oil pump normal signal, improves abnormal sound judging nicety rate.By sound transducer Real-Time Monitoring high pressure oil pump working state, produce abnormal sound and feed back to staff in time, for malfunction elimination is saved time, avoid high pressure oil pump " morbid state " to run, reduce high pressure oil pump damaged condition, save production cost.Adopt the fault state of prior-warning device prompting high pressure oil pump, make detection more simple and clear.
Embodiment 2
The present embodiment 2 provides a kind of automobile engine high pressure oil pump abnormal sound detecting method, this detecting method comprises: described sound transducer is fixed on one on the fixed support of high pressure oil pump placement, and the distance of described fixed support and high pressure oil pump is preferably in the scope of 50cm.Sound signal, for gathering the sound signal from high pressure oil pump, is converted into electrical signal by this sound transducer 110; Amplifier 120 receives the signal that sound transducer 110 transmits, and exports to wave filter 130 after being amplified by this signal; Wave filter 130 pairs of signals carry out filtering after by Signal transmissions to A/D converter 140, to be exaggerated and the electrical signal of filtering is converted to digital signal through A/D converter 140; A/D converter 140 is connected with computer 150;
The digital signal of sound is run under described computer 150 prestores high pressure oil pump normal state, and the digital signal received after A/D converter 140 is changed, the normal sound sampled digital signal of this digital signal and prestor is carried out analysing and processing, determines whether abnormal sound with this.
Particularly, please refer to Fig. 2, the normal sound sampled digital signal of this digital signal and prestor carried out analysing and processing, determine whether that the process of abnormal sound comprises with this:
Computer gathers the output data of A/D converter 140 by data-interface, generates data stream, and does following process:
Data slot data stream being cut into fixed size stores, the such as record segment of 1 second.
For each data slot, carry out time-domain related calculation with the sampled digital signal of the normal sound of prestor in computer, and statistical correlation computing peak value;
This related operation peak value and the first peak value preset are compared.If related operation peak value is less than the first default peak value, generate a record mark;
Record mark in one section preset time (such as 20 seconds) is added up, if the aggregate-value of record mark is greater than a predetermined threshold value, shows that the sound of current collection and normal sound signal exist significant difference, be considered as abnormal sound.
If abnormal sound, then send fault pre-alarming prompting.The mode of fault pre-alarming prompting can be such as that the early-warning lamp connecting computer lights; can also be glimmered by fault cues lamp or sound alarm or by fault cues information displaying on a display screen etc. fault cues mode remind people that high-pressure oil pump of engine breaks down so that notify that staff shuts down in time, high pressure oil pump is keeped in repair.
The present embodiment, by measured signal and the contrast of high pressure oil pump normal signal, improves abnormal sound judging nicety rate.By sound transducer Real-Time Monitoring high pressure oil pump working state, produce abnormal sound and feed back to staff in time, for malfunction elimination is saved time, avoid high pressure oil pump " morbid state " to run, reduce high pressure oil pump damaged condition, save production cost.Adopt the fault state of prior-warning device prompting high pressure oil pump, make detection more simple and clear.
Embodiment 3
Please refer to Fig. 3, Fig. 3 is the structural representation of the automobile engine high pressure oil pump abnormal sound detection device 2 of the embodiment of the present invention 3.
The automobile engine high pressure oil pump detection device 1 that automobile engine high pressure oil pump detection device 2 in embodiments of the invention 3 is compared in embodiment 1 adds pickup device 270 and earphone 280, this pickup device 270 and sound transducer 210 are together fixed on a fixed support placed near high pressure oil pump, and the distance of described fixed support and high pressure oil pump is preferably in the scope of 50cm.This pickup device 270 is also for gathering the sound signal from high pressure oil pump, the earphone 280 connecting pickup device 270 can be used for staff to carry out real-time listening to high pressure oil pump operational sound, and store high pressure oil pump Abnormal Sound source of sound, for later high pressure oil pump R&D work provides reference.
In addition, identical with embodiment 1 of the remaining part in the automobile engine high pressure oil pump detection device 2 of embodiment 3, its working principle is also identical, specifically see the description of embodiment 1, repeats no more herein.
High pressure oil pump abnormal sound is exported by earphone by pickup device by the present embodiment 3, substitutes ear detection abnormal sound, ensures staff's personal safety.
Embodiment 4
Embodiments of the invention 4 provide a kind of automobile engine high pressure oil pump detecting method, this detecting method is compared with the automobile engine high pressure oil pump detecting method in embodiment 2, difference is: when the sound signal using sound transducer collection from high pressure oil pump, adopt a pickup device to gather this sound signal simultaneously, described sound transducer is fixed on together with described pickup device one on the fixed support of high pressure oil pump placement; Be connected successively with earphone, acoustic memory by this pickup device, described earphone is used for the operation sound for staff's real-time listening high pressure oil pump, and described acoustic memory stores high pressure oil pump Abnormal Sound source of sound, for later high pressure oil pump R&D work provides reference.
In addition, identical with embodiment 2 of all the other steps in the automobile engine high pressure oil pump detecting method of embodiment 4, specifically see the description of embodiment 2, repeats no more herein.
High pressure oil pump abnormal sound is exported by earphone by pickup device by the present embodiment 4, substitutes ear detection abnormal sound, ensures staff's personal safety.
Embodiment 5
Please refer to Fig. 4, Fig. 4 is the structural representation of the automobile engine high pressure oil pump abnormal sound detection device 3 of the embodiment of the present invention 5.
The automobile engine high pressure oil pump detection device 3 of the embodiment of the present invention 5 comprise sound transducer 310,311, amplifier 320,321, wave filter 330,331, A/D converter 340,341, computer 350, prior-warning device 360, pickup device 370 and earphone 380, the output terminal of this sound transducer 310 connects the input end of amplifier 320, the input end that output terminal connects the input end of wave filter 330, the output terminal of wave filter 330 connects A/D converter 340 of amplifier 320, the output terminal of A/D converter 340 connects the input end of computer 350; The output terminal of this sound transducer 311 connects the input end of amplifier 321, the input end that output terminal connects the input end of wave filter 331, the output terminal of wave filter 331 connects A/D converter 341 of amplifier 321, the output terminal of A/D converter 341 connects the input end of computer 351, and the output terminal of computer 350 connects prior-warning device 360; The input end of the output terminal frames connecting with headphone 380 of pickup device 370.
Wherein, sound transducer 310 is fixed on the fixed support of high pressure oil pump placement together with pickup device 370, and described in this support bracket fastened placement location preferred distance, high pressure oil pump is in the scope of 50cm.Sound transducer 311 is fixed on one and places away from high pressure oil pump and on another fixed support apart from described sound transducer 310 intended distance, and the direction that described sound transducer 311 and sound transducer 310 gather sound is contrary.Preferably, another fixed support distance high-voltage oil pump described is in the scope of 100cm-120cm and apart from described fixed support in the scope of 50cm-70cm.Set-up mode is not limited thereto, those skilled in the art should be understood that, as long as by position and the direction of rationally placing sound transducer, mainly collection is from the sound signal of high pressure oil pump to make sound transducer 310, and sound transducer 311 mainly gathers the sound signal from high pressure oil pump surrounding environment.
The sound signal of collection is converted into the first electrical signal by described sound transducer 310; Described first electrical signal is transferred to A/D converter 340 after the amplification, filtering process of amplifier 320, wave filter 330, and described A/D converter 340 carries out analog-to-digital conversion to the electrical signal after process, exports the first digital signal to computer 350.The sound signal of collection is converted into the second electrical signal by described sound transducer 311; Described second electrical signal is transferred to A/D converter 341 after the amplification, filtering process of amplifier 321, wave filter 331, and described A/D converter 341 carries out analog-to-digital conversion to the electrical signal after process, exports the second digital signal to computer 350.
The digital signal of sound is run under described computer 350 prestores high pressure oil pump normal state, and receive the first digital signal, the second digital signal after A/D converter 340,341 is changed respectively, the normal sound sampled digital signal of this first digital signal, the second digital signal and prestor is carried out analysing and processing, determines whether abnormal sound with this.
Pickup device 370 is also for gathering the sound signal from high pressure oil pump, the earphone 380 connecting pickup device 370 can be used for staff to carry out real-time listening to high pressure oil pump operational sound, and store high pressure oil pump Abnormal Sound source of sound, for later high pressure oil pump R&D work provides reference.
The present embodiment adopts high pressure oil pump abnormal sound detection device whether can be in normal working by Real-Time Monitoring high pressure oil pump, occurs the timely early warning of abnormal sound; By the sound signal of Real-time Collection compared with the normal operational sound of high pressure oil pump, accurately judge whether high pressure oil pump occurs abnormal sound; By increasing the sound transducer and corresponding amplification, filtering and A/D change-over circuit that gather ambient noise, the interference that ambient noise detects abnormal sound can be eliminated, improve accuracy in detection; High pressure oil pump abnormal sound detection device cost is low, be convenient to install, highly sensitive, improve abnormal sound detection efficiency, reduce maintenance cost.
Embodiment 6
Embodiments of the invention 6 provide a kind of automobile engine high pressure oil pump detecting method, this detecting method is compared with the automobile engine high pressure oil pump detecting method in embodiment 4, difference is: when using sound transducer 310 and pickup device 370 to gather the sound signal from high pressure oil pump, use the sound of a sound transducer 311 pairs of high pressure oil pump surrounding environment to gather simultaneously, and sound transducer 311 is connected successively with amplifier 321, wave filter 331, A/D converter 341, the output of A/D converter 341 is connected with computer 350.Because the sound signal that sound transducer 311 gathers includes the ambient noise of surrounding, in a computer by the interference that computing can be eliminated or part stress release treatment is adjudicated abnormal sound, thus improve the accuracy of abnormal sound judgement.
Detecting method due to the present embodiment adds carries out acquisition and processing to the sound of high pressure oil pump surrounding environment, so the treatment step that carries out after receiving digital signal from A/D converter 340,341 of computer and embodiment 4 different, concrete treatment step comprises:
Computer 350 gathers the output data of A/D converter 340 and A/D converter 341 by data-interface, generates data stream 1 and data stream 2, and does following process
Calculus of differences is done to data stream 1 and data stream 2, generates data stream 3, to eliminate the impact of ambient noise;
The data slot 4 data stream 3 being cut into fixed size stores, such as the record segment of 1 second.
To each data slot 4, the normal sound signal stored up with calculator memory carries out time-domain related calculation, and statistical correlation computing peak value, compare with the first peak value preset.If related operation peak value is less than the first default peak value, generate a record mark.
Record mark in one section preset time (such as 20 seconds) is added up, if the aggregate-value of record mark is greater than a predetermined threshold value, shows that the sound of current collection and normal sound signal exist significant difference, be considered as abnormal sound.
If abnormal sound, then send fault pre-alarming prompting.The mode of fault pre-alarming prompting can be such as that the early-warning lamp connecting computer lights; can also be glimmered by fault cues lamp or sound alarm or by fault cues information displaying on a display screen etc. fault cues mode remind people that high-pressure oil pump of engine breaks down so that notify that staff shuts down in time, high pressure oil pump is keeped in repair.
The present embodiment is by increasing the sound transducer and corresponding amplification, filtering and A/D change-over circuit that gather high pressure oil pump ambient noise, obtain the ambient noise around high pressure oil pump, and carry out calculus of differences with the sound signal that high pressure oil pump sound transducer obtains, the interference that ambient noise detects abnormal sound can be eliminated, improve accuracy in detection.By sound transducer Real-Time Monitoring high pressure oil pump working state, produce abnormal sound and feed back to staff in time, for malfunction elimination is saved time, avoid high pressure oil pump " morbid state " to run, reduce high pressure oil pump damaged condition, save production cost.Adopt the fault state of prior-warning device prompting high pressure oil pump, make detection more simple and clear.
In addition, identical with embodiment 4 of all the other steps in the automobile engine high pressure oil pump detecting method of embodiment 6, specifically see the description of embodiment 4, repeats no more herein.
Obviously, above-described embodiment is only considered as clearly example being described, and the restriction not to mode of execution.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all mode of executions.And thus the apparent change of extending out or variation be still among the protection domain of the invention.
Claims (16)
1. an automobile engine high pressure oil pump abnormal sound detecting method, is characterized in that, comprise the following steps:
With the sound signal of sound transducer collection from high pressure oil pump, sound signal is converted into electrical signal;
Described sound transducer is connected successively with amplifier, wave filter, A/D converter, computer, described electrical signal is transferred to A/D converter after the amplification, filtering process of amplifier, wave filter, described A/D converter carries out analog-to-digital conversion to the electrical signal after process, and output digit signals is to computer;
Described computer runs the digital signal of sound under prestoring high pressure oil pump normal state, and the digital signal received after A/D converter conversion, the normal sound sampled digital signal of this digital signal and prestor is carried out analysing and processing, determines whether abnormal sound with this.
2. automobile engine high pressure oil pump abnormal sound detecting method as claimed in claim 1, is characterized in that: if computer judge that conclusion is as there being abnormal sound, then send fault pre-alarming prompting.
3. automobile engine high pressure oil pump abnormal sound detecting method as claimed in claim 1 or 2, it is characterized in that: also use a pickup device to gather sound signal from high pressure oil pump simultaneously, this pickup device is connected successively with earphone, acoustic memory, described earphone is used for the operation sound of real-time listening high pressure oil pump, and described acoustic memory stores high pressure oil pump Abnormal Sound source of sound.
4. the automobile engine high pressure oil pump abnormal sound detecting method as described in any one of claim 1-3, it is characterized in that: when only adopting described sound transducer collected sound signal, described sound transducer being fixed on one on the fixed support of high pressure oil pump placement; When adopting described sound transducer and described pickup device while during collected sound signal, described sound transducer is fixed on together with described pickup device one on the fixed support of high pressure oil pump placement.
5. automobile engine high pressure oil pump abnormal sound detecting method as claimed in claim 4, is characterized in that: described fixed support distance high-voltage oil pump is in the scope of 50cm.
6. the automobile engine high pressure oil pump abnormal sound detecting method as described in any one of claim 1-5, is characterized in that, the described normal sound sampled digital signal by this digital signal and prestor carries out analysing and processing, determines whether that the process of abnormal sound comprises with this:
Digital signal is stored as data stream;
This data stream is cut into the data slot of fixed size;
For each data slot, carry out time-domain related calculation with the sampled digital signal of the normal sound of prestor in computer, and statistical correlation computing peak value;
This related operation peak value and the first peak value preset are compared, if related operation peak value is less than the first default peak value, generates a record mark;
Record mark in one preset time section is added up, if the aggregate-value of described record mark is greater than a predetermined threshold value, shows that the sound of current collection and normal sound signal exist significant difference, be judged as abnormal sound.
7. an automobile engine high pressure oil pump abnormal sound detecting method, is characterized in that, comprise the following steps:
Gather the sound signal from high pressure oil pump with first sound sound sensor, the first sound tone signal of acquisition is converted into the first electrical signal;
Gather the sound signal from high pressure oil pump surrounding environment with second sound sound sensor, the second sound signal of acquisition is converted into the second electrical signal;
Described first sound sound sensor is connected successively with the first amplifier, the first wave filter, the first A/D converter, computer, described first electrical signal is transferred to the first A/D converter after the amplification, filtering process of the first amplifier, the first wave filter, described first A/D converter carries out analog-to-digital conversion to the electrical signal after process, exports the first digital signal to computer;
Described second sound sound sensor is connected successively with the second amplifier, the second wave filter, the second A/D converter, described computer, described second electrical signal is transferred to A/D converter after the amplification, filtering process of amplifier, wave filter, described A/D converter carries out analog-to-digital conversion to the electrical signal after process, exports the second digital signal to computer;
Described computer runs the digital signal of sound under prestoring high pressure oil pump normal state, and receive the first digital signal, the second digital signal after first, second A/D converter is changed respectively, the normal sound sampled digital signal of this first digital signal, the second digital signal and prestor is carried out analysing and processing, determines whether abnormal sound with this.
8. automobile engine high pressure oil pump abnormal sound detecting method as claimed in claim 7, is characterized in that: if computer judge that conclusion is as there being abnormal sound, then send fault pre-alarming prompting.
9. automobile engine high pressure oil pump abnormal sound detecting method as claimed in claim 7 or 8, it is characterized in that: also use a pickup device to gather sound signal from high pressure oil pump simultaneously, this pickup device is connected successively with earphone, acoustic memory, described earphone is used for the operation sound of real-time listening high pressure oil pump, and described acoustic memory stores high pressure oil pump Abnormal Sound source of sound.
10. the automobile engine high pressure oil pump abnormal sound detecting method as described in any one of claim 7-9, it is characterized in that: when adopting described first sound sound sensor and the second sound sound sensor while during collected sound signal, described first sound sound sensor is fixed on a fixed support placed near high pressure oil pump, described second sound sound sensor is fixed on one and places away from high pressure oil pump and on another fixed support apart from described first sound sound sensor intended distance; When adopting first, second sound transducer described and described pickup device while during collected sound signal, described first sound sound sensor is fixed on together with described pickup device on a fixed support placed near high pressure oil pump, described second sound sound sensor is fixed on one and places away from high pressure oil pump and on another fixed support apart from described first sound sound sensor intended distance.
11. automobile engine high pressure oil pump abnormal sound detecting methods as claimed in claim 10, is characterized in that: the direction that described first sound sound sensor and described second sound sound sensor gather sound is contrary.
12. automobile engine high pressure oil pump abnormal sound detecting methods as described in claim 10 or 11, it is characterized in that: described fixed support distance high-voltage oil pump is in the scope of 50cm, and another fixed support distance high-voltage oil pump described is in the scope of 100cm-120cm and apart from described fixed support in the scope of 50cm-70cm.
13. automobile engine high pressure oil pump abnormal sound detecting methods as described in any one of claim 7-12, it is characterized in that, the described normal sound sampled digital signal by this first digital signal, the second digital signal and prestor carries out analysing and processing, determines whether that the process of abnormal sound comprises with this:
Described first digital signal, the second digital signal are stored as the first data stream and the second data stream;
Calculus of differences is done to the first data stream and the second data stream, generates the 3rd data stream;
3rd data stream is cut into the data slot of fixed size;
For each data slot, carry out time-domain related calculation with the sampled digital signal of the normal sound of prestor in computer, and statistical correlation computing peak value;
This related operation peak value and the first peak value preset are compared, if related operation peak value is less than the first default peak value, generates a record mark;
Record mark in one preset time section is added up, if the aggregate-value of described record mark is greater than a predetermined threshold value, shows that the sound of current collection and normal sound signal exist significant difference, be judged as abnormal sound.
14. 1 kinds of automobile engine high pressure oil pump abnormal sound detection devices, is characterized in that, comprising: sound transducer, amplifier, wave filter, A/D converter, computer; Described sound transducer is connected successively with amplifier, wave filter, A/D converter, computer, and sound signal, for gathering the sound signal from high pressure oil pump, is converted into electrical signal by described sound transducer; Described electrical signal is transferred to A/D converter after the amplification, filtering process of amplifier, wave filter, and described A/D converter carries out analog-to-digital conversion to the electrical signal after process, and output digit signals is to computer;
Described computer runs the digital signal of sound under prestoring high pressure oil pump normal state, and the digital signal received after A/D converter conversion, the normal sound sampled digital signal of this digital signal and prestor is carried out analysing and processing, determines whether abnormal sound with this.
15. automobile engine high pressure oil pump abnormal sound detection devices as claimed in claim 14, it is characterized in that: also comprise a pickup device, this pickup device gathers the sound signal from high pressure oil pump simultaneously, this pickup device is connected successively with earphone, acoustic memory, described earphone is used for the operation sound of real-time listening high pressure oil pump, and described acoustic memory stores high pressure oil pump Abnormal Sound source of sound.
16. 1 kinds of automobile engine high pressure oil pump abnormal sound detection devices, is characterized in that, comprising:
First sound sound sensor, for gathering the sound signal from high pressure oil pump, is converted into the first electrical signal by the first sound tone signal of acquisition;
Second sound sound sensor, for gathering the sound signal from high pressure oil pump surrounding environment, is converted into the second electrical signal by the second sound signal of acquisition;
Described first sound sound sensor is connected successively with the first amplifier, the first wave filter, the first A/D converter, computer, described first electrical signal is transferred to the first A/D converter after the amplification, filtering process of the first amplifier, the first wave filter, described first A/D converter carries out analog-to-digital conversion to the electrical signal after process, exports the first digital signal to computer;
Described second sound sound sensor is connected successively with the second amplifier, the second wave filter, the second A/D converter, described computer, described second electrical signal is transferred to A/D converter after the amplification, filtering process of amplifier, wave filter, described A/D converter carries out analog-to-digital conversion to the electrical signal after process, exports the second digital signal to computer;
Described computer runs the digital signal of sound under prestoring high pressure oil pump normal state, and receive the first digital signal, the second digital signal after first, second A/D converter is changed respectively, the normal sound sampled digital signal of this first digital signal, the second digital signal and prestor is carried out analysing and processing, determines whether abnormal sound with this.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105675306A (en) * | 2016-01-12 | 2016-06-15 | 天津理工大学 | Self-testing method and system for automobile |
| CN106401937A (en) * | 2016-09-30 | 2017-02-15 | 联合汽车电子有限公司 | Oil pump noise test device and test method |
| CN107304750A (en) * | 2016-04-18 | 2017-10-31 | 北京金风科创风电设备有限公司 | Abnormal sound detection method and system for tower of wind generating set |
| CN108784932A (en) * | 2017-05-02 | 2018-11-13 | 中国石油化工股份有限公司 | A kind of preventing noise ear cover based on spectrum analysis |
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| CN109580268A (en) * | 2018-12-22 | 2019-04-05 | 西安瑞联工业智能技术有限公司 | A kind of product abnormal sound, abnormal sound intelligent detecting method |
| CN110630499A (en) * | 2019-10-12 | 2019-12-31 | 重庆建设车用空调器有限责任公司 | Method for judging whether abnormal sound is caused by rotary vane compressor |
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| CN113250961A (en) * | 2021-05-10 | 2021-08-13 | 广东葆德科技有限公司 | Compressor fault detection method and detection system |
| CN115839335A (en) * | 2023-02-15 | 2023-03-24 | 四川省机械研究设计院(集团)有限公司 | Test bench and test method for water pump |
| CN117310320A (en) * | 2023-09-25 | 2023-12-29 | 国网山东省电力公司莘县供电公司 | Portable high-voltage equipment fault sound inspection device and fault detection method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102072144A (en) * | 2011-03-11 | 2011-05-25 | 大连大学 | Vibration and noise online monitoring and fault diagnosis system of scroll compressor |
| JP2012112571A (en) * | 2010-11-24 | 2012-06-14 | Hitachi Appliances Inc | Air conditioner |
| CN102680233A (en) * | 2011-03-17 | 2012-09-19 | 北汽福田汽车股份有限公司 | Motor failure diagnosis device and method |
| CN103075333A (en) * | 2012-12-29 | 2013-05-01 | 中国科学院沈阳科学仪器股份有限公司 | Noise monitoring and protection device and method for bearing of oilless vacuum pump |
| CN203670182U (en) * | 2013-12-26 | 2014-06-25 | 江苏大学 | Device for detecting unsteady flow of small-flow working condition of centrifugal pump based on acoustic emission technology |
| CN104122094A (en) * | 2014-07-29 | 2014-10-29 | 南通理工学院 | Method and device for diagnosing abnormal sound fault of engine |
-
2014
- 2014-12-19 CN CN201410805028.2A patent/CN104863839B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012112571A (en) * | 2010-11-24 | 2012-06-14 | Hitachi Appliances Inc | Air conditioner |
| CN102072144A (en) * | 2011-03-11 | 2011-05-25 | 大连大学 | Vibration and noise online monitoring and fault diagnosis system of scroll compressor |
| CN102680233A (en) * | 2011-03-17 | 2012-09-19 | 北汽福田汽车股份有限公司 | Motor failure diagnosis device and method |
| CN103075333A (en) * | 2012-12-29 | 2013-05-01 | 中国科学院沈阳科学仪器股份有限公司 | Noise monitoring and protection device and method for bearing of oilless vacuum pump |
| CN203670182U (en) * | 2013-12-26 | 2014-06-25 | 江苏大学 | Device for detecting unsteady flow of small-flow working condition of centrifugal pump based on acoustic emission technology |
| CN104122094A (en) * | 2014-07-29 | 2014-10-29 | 南通理工学院 | Method and device for diagnosing abnormal sound fault of engine |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105675306B (en) * | 2016-01-12 | 2018-08-10 | 天津理工大学 | A kind of automobile self-sensing method and detecting system |
| CN105675306A (en) * | 2016-01-12 | 2016-06-15 | 天津理工大学 | Self-testing method and system for automobile |
| CN107304750B (en) * | 2016-04-18 | 2019-04-02 | 北京金风科创风电设备有限公司 | Abnormal sound detection method and system for tower of wind generating set |
| CN107304750A (en) * | 2016-04-18 | 2017-10-31 | 北京金风科创风电设备有限公司 | Abnormal sound detection method and system for tower of wind generating set |
| CN106401937A (en) * | 2016-09-30 | 2017-02-15 | 联合汽车电子有限公司 | Oil pump noise test device and test method |
| CN108784932A (en) * | 2017-05-02 | 2018-11-13 | 中国石油化工股份有限公司 | A kind of preventing noise ear cover based on spectrum analysis |
| CN109356837A (en) * | 2018-09-30 | 2019-02-19 | 赛腾机电科技（常州）有限公司 | A kind of plunger pump trouble analysis method and analytical equipment |
| CN109356837B (en) * | 2018-09-30 | 2020-04-24 | 赛腾机电科技（常州）有限公司 | Plunger pump fault analysis method and analysis device |
| CN109580268A (en) * | 2018-12-22 | 2019-04-05 | 西安瑞联工业智能技术有限公司 | A kind of product abnormal sound, abnormal sound intelligent detecting method |
| CN110630499A (en) * | 2019-10-12 | 2019-12-31 | 重庆建设车用空调器有限责任公司 | Method for judging whether abnormal sound is caused by rotary vane compressor |
| CN112268614A (en) * | 2020-10-28 | 2021-01-26 | 深圳市泰祺科技有限公司 | Automobile monitoring method and system |
| CN113250961A (en) * | 2021-05-10 | 2021-08-13 | 广东葆德科技有限公司 | Compressor fault detection method and detection system |
| CN115839335A (en) * | 2023-02-15 | 2023-03-24 | 四川省机械研究设计院(集团)有限公司 | Test bench and test method for water pump |
| CN115839335B (en) * | 2023-02-15 | 2023-05-26 | 四川省机械研究设计院(集团)有限公司 | Water pump test bench and test method |
| CN117310320A (en) * | 2023-09-25 | 2023-12-29 | 国网山东省电力公司莘县供电公司 | Portable high-voltage equipment fault sound inspection device and fault detection method |
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