CN113511216A - Method and equipment for detecting broken shaft fault of transmission shaft of vehicle generator - Google Patents
Method and equipment for detecting broken shaft fault of transmission shaft of vehicle generator Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/02—Ensuring safety in case of control system failures, e.g. by diagnosing, circumventing or fixing failures
- B60W50/0205—Diagnosing or detecting failures; Failure detection models
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/06—Combustion engines, Gas turbines
- B60W2510/0638—Engine speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/30—Auxiliary equipments
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/06—Combustion engines, Gas turbines
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Abstract
The invention provides a method and equipment for detecting a broken shaft fault of a transmission shaft of a vehicle generator. The method comprises the following steps: detecting an engine crankshaft rotating speed signal and a generator rotor rotating speed signal in real time, and receiving the engine crankshaft rotating speed signal and the generator rotor rotating speed signal; carrying out first-order filtering and denoising on the received engine crankshaft rotating speed signal and the generator rotor rotating speed signal, carrying out difference on the filtered engine crankshaft rotating speed signal and the filtered generator rotor rotating speed signal, and obtaining a speed difference absolute value by taking an absolute value of a difference value; and if the absolute value of the speed difference exceeds a preset threshold value, determining that the transmission shaft of the generator is broken. The invention can timely maintain the transmission shaft after the transmission shaft breaks down, stop swinging the engine or limit the torsion of the engine, and effectively avoid serious traffic accidents.
Description
Technical Field
The embodiment of the invention relates to the technical field of fault detection of a vehicle generator, in particular to a method and equipment for detecting a broken shaft fault of a transmission shaft of a vehicle generator.
Background
In order to meet the requirement of high-power electricity consumption of equipment on a vehicle, a high-power generator is additionally arranged at the flywheel end of an engine, and a rotor of the generator is rigidly connected with a crankshaft of the engine through a transmission shaft. Due to the effect of alternating bending stress and torsional stress endured for a long time in the operation process of the generator, shaft breakage failure may occur. At present, no effective detection method is available for the broken shaft fault of the transmission shaft, and the broken shaft can cause insufficient power supply of equipment on a vehicle, and can cause the vehicle to be out of control under severe conditions so as to cause traffic accidents. Therefore, it is an urgent technical problem to be solved in the art to develop a method and a device for detecting a shaft breakage failure of a transmission shaft of a vehicle generator, which can effectively overcome the above-mentioned defects in the related art.
Disclosure of Invention
Aiming at the problems in the prior art, the embodiment of the invention provides a method and equipment for detecting the broken shaft fault of a transmission shaft of a vehicle generator.
In a first aspect, an embodiment of the present invention provides a method for detecting a shaft breakage fault of a transmission shaft of a vehicle generator, including: detecting an engine crankshaft rotating speed signal and a generator rotor rotating speed signal in real time, and receiving the engine crankshaft rotating speed signal and the generator rotor rotating speed signal; carrying out first-order filtering and denoising on the received engine crankshaft rotating speed signal and the generator rotor rotating speed signal, carrying out difference on the filtered engine crankshaft rotating speed signal and the filtered generator rotor rotating speed signal, and obtaining a speed difference absolute value by taking an absolute value of a difference value; and if the absolute value of the speed difference exceeds a preset threshold value, determining that the transmission shaft of the generator is broken.
On the basis of the content of the embodiment of the method, the method for detecting the broken shaft fault of the transmission shaft of the vehicle generator, which is provided by the embodiment of the invention, comprises the following steps of: and detecting a rotating speed signal of the crankshaft of the engine in real time by adopting an engine controller ECU.
On the basis of the content of the embodiment of the method, the method for detecting the broken shaft fault of the transmission shaft of the vehicle generator, which is provided by the embodiment of the invention, comprises the following steps of: and detecting a rotating speed signal of a generator rotor in real time by adopting a generator controller MCU.
On the basis of the content of the embodiment of the method, the method for detecting the broken shaft fault of the transmission shaft of the vehicle generator, provided by the embodiment of the invention, for receiving the rotating speed signal of the crankshaft of the engine and the rotating speed signal of the rotor of the generator comprises the following steps: the hybrid controller HCM receives the engine crankshaft rotating speed signal and the generator rotor rotating speed signal through two CAN buses respectively.
On the basis of the content of the embodiment of the method, the method for detecting the broken shaft fault of the transmission shaft of the vehicle generator, which is provided by the embodiment of the invention, is used for carrying out first-order filtering and denoising on the received engine crankshaft rotating speed signal and comprises the following steps:
Y(n)＝a1X(n)+(1-a1)Y(n-1)
wherein, Y (n) is the nth engine crankshaft rotating speed signal filtering output value; a1 is the filtering coefficient of the engine crankshaft speed signal; x (n) is a sampled value of the nth engine crankshaft speed signal; y (n-1) is the filtered output value of the crankshaft speed signal of the engine at the (n-1) th time.
On the basis of the content of the embodiment of the method, the method for detecting the broken shaft fault of the transmission shaft of the vehicle generator, which is provided by the embodiment of the invention, is used for carrying out first-order filtering and denoising on the received rotating speed signal of the rotor of the generator, and comprises the following steps of:
M(n)＝a2N(n)+(1-a2)M(n-1)
wherein, M (n) is the nth generator rotor speed signal filtering output value; a2 is a filtering coefficient of a generator rotor speed signal; n (n) is a sampled value of the nth generator rotor speed signal; m (n-1) is the filtered output value of the rotation speed signal of the generator rotor at the (n-1) th time.
On the basis of the content of the foregoing method embodiment, the method for detecting a shaft breakage fault of a transmission shaft of a vehicle generator according to an embodiment of the present invention, where determining that a shaft breakage occurs in the transmission shaft of the generator if an absolute value of a speed difference exceeds a preset threshold includes:
|Y(n)-M(n)|＞L
wherein, L is a preset threshold value.
In a second aspect, an embodiment of the present invention provides a device for detecting a shaft breakage fault of a transmission shaft of a vehicle generator, including: the first main module is used for detecting an engine crankshaft rotating speed signal and a generator rotor rotating speed signal in real time and receiving the engine crankshaft rotating speed signal and the generator rotor rotating speed signal; the second main module is used for carrying out first-order filtering and denoising on the received engine crankshaft rotating speed signal and the generator rotor rotating speed signal, making a difference between the filtered engine crankshaft rotating speed signal and the filtered generator rotor rotating speed signal, and obtaining a speed difference absolute value by taking an absolute value of the difference; and the third main module is used for determining that the generator transmission shaft is broken if the absolute value of the speed difference exceeds a preset threshold value.
In a third aspect, an embodiment of the present invention provides an electronic device, including:
at least one processor; and
at least one memory communicatively coupled to the processor, wherein:
the memory stores program instructions executable by the processor, and the processor calls the program instructions to execute the method for detecting the broken shaft fault of the transmission shaft of the vehicle generator provided by any one of the various implementation manners of the first aspect.
In a fourth aspect, an embodiment of the present invention provides a non-transitory computer-readable storage medium storing computer instructions, where the computer instructions cause a computer to execute the method for detecting a broken shaft fault of a transmission shaft of a vehicle generator provided in any one of the various implementation manners of the first aspect.
According to the method and the device for detecting the shaft breakage fault of the transmission shaft of the vehicle generator, the received engine crankshaft rotation speed signal and the received generator rotor rotation speed signal are subjected to first-order filtering denoising, the two filtered rotation speed signals are subjected to subtraction, the absolute value of the difference value is obtained, the absolute value of the speed difference is compared with the preset threshold value, whether the shaft breakage fault occurs in the transmission shaft of the generator is finally determined, the transmission shaft breakage fault can be maintained in time after the shaft breakage fault occurs, the engine is stopped or limited in torsion, and the occurrence of major traffic accidents is effectively avoided.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description will be given below to the drawings required for the description of the embodiments or the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flowchart of a method for detecting a shaft breakage fault of a transmission shaft of a vehicle generator according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a device for detecting a shaft breakage fault of a transmission shaft of a vehicle generator according to an embodiment of the present invention;
fig. 3 is a schematic physical structure diagram of an electronic device according to an embodiment of the present invention;
FIG. 4 is a graph illustrating the comparison between the rotational speed of the crankshaft of the engine and the rotational speed of the rotor of the generator during the operation of the vehicle according to the embodiment of the present invention;
FIG. 5 is a graph illustrating the comparison between the rotational speed of the crankshaft of the engine and the rotational speed of the rotor of the generator during the starting process of the vehicle according to the embodiment of the present invention;
fig. 6 is a schematic diagram of a hardware structure of a method for detecting a broken shaft fault of a transmission shaft of a vehicle generator according to an embodiment of the present invention in actual application of a vehicle.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. In addition, technical features of various embodiments or individual embodiments provided by the present invention may be arbitrarily combined with each other to form a feasible technical solution, and such combination is not limited by the sequence of steps and/or the structural composition mode, but must be realized by a person skilled in the art, and when the technical solution combination is contradictory or cannot be realized, such a technical solution combination should not be considered to exist and is not within the protection scope of the present invention.
The embodiment of the invention provides a method for detecting a broken shaft fault of a transmission shaft of a vehicle generator, and referring to fig. 1, the method comprises the following steps: detecting an engine crankshaft rotating speed signal and a generator rotor rotating speed signal in real time, and receiving the engine crankshaft rotating speed signal and the generator rotor rotating speed signal; carrying out first-order filtering and denoising on the received engine crankshaft rotating speed signal and the generator rotor rotating speed signal, carrying out difference on the filtered engine crankshaft rotating speed signal and the filtered generator rotor rotating speed signal, and obtaining a speed difference absolute value by taking an absolute value of a difference value; and if the absolute value of the speed difference exceeds a preset threshold value, determining that the transmission shaft of the generator is broken.
Based on the content of the above method embodiment, as an optional embodiment, the method for detecting a broken shaft fault of a transmission shaft of a vehicle generator provided in the embodiment of the present invention includes: and detecting a rotating speed signal of the crankshaft of the engine in real time by adopting an engine controller ECU.
Based on the content of the above method embodiment, as an optional embodiment, the method for detecting a shaft breakage fault of a transmission shaft of a vehicle generator provided in the embodiment of the present invention includes: and detecting a rotating speed signal of a generator rotor in real time by adopting a generator controller MCU.
Based on the content of the foregoing method embodiment, as an optional embodiment, the method for detecting a broken shaft fault of a transmission shaft of a vehicle generator provided in the embodiment of the present invention, which receives a crankshaft speed signal of an engine and a rotor speed signal of a generator, includes: the hybrid controller HCM receives the engine crankshaft rotating speed signal and the generator rotor rotating speed signal through two CAN buses respectively.
Specifically, referring to fig. 6, the engine controller ECU detects the engine crankshaft rotation speed in real time, the generator controller MCU detects the generator rotor rotation speed in real time, and the hybrid controller HCM receives the engine crankshaft rotation speed and the generator rotor rotation speed through two CAN1 and CAN2 buses, respectively. Generally, under the condition of smooth running, the error between the two is small and is within 10rpm (namely, revolutions per minute) (as shown in figure 4). However, during the engine start, the engine speed fluctuates dramatically and the difference between the two speeds can reach 100rpm or more (as shown in fig. 5). In addition, due to signal delay caused by inconsistent transmission rates of the two rotating speed messages, the error is larger under the condition of rapid acceleration and deceleration. The electric power generated by the generator can be provided to the clutch and the speed change device for use.
Based on the content of the above method embodiment, as an optional embodiment, the method for detecting a broken shaft fault of a transmission shaft of a vehicle generator provided in the embodiment of the present invention includes performing first-order filtering and denoising on a received engine crankshaft rotation speed signal, including:
Y(n)＝a1X(n)+(1-a1)Y(n-1) (1)
wherein, Y (n) is the nth engine crankshaft rotating speed signal filtering output value; a1 is the filtering coefficient of the engine crankshaft speed signal; x (n) is a sampled value of the nth engine crankshaft speed signal; y (n-1) is the filtered output value of the crankshaft speed signal of the engine at the (n-1) th time.
Based on the content of the above method embodiment, as an optional embodiment, the method for detecting a broken shaft fault of a transmission shaft of a vehicle generator provided in the embodiment of the present invention, performing first-order filtering and denoising on a received generator rotor rotation speed signal, includes:
M(n)＝a2N(n)+(1-a2)M(n-1) (2)
wherein, M (n) is the nth generator rotor speed signal filtering output value; a2 is a filtering coefficient of a generator rotor speed signal; n (n) is a sampled value of the nth generator rotor speed signal; m (n-1) is the filtered output value of the rotation speed signal of the generator rotor at the (n-1) th time.
Based on the content of the foregoing method embodiment, as an optional embodiment, the method for detecting a shaft breakage fault of a transmission shaft of a vehicle generator provided in the embodiment of the present invention, where determining that a shaft breakage occurs in the transmission shaft of the generator if an absolute value of a speed difference exceeds a preset threshold includes:
|Y(n)-M(n)|＞L (3)
wherein, L is a preset threshold value.
Specifically, one end of the transmission shaft is connected with a crankshaft of the engine, the crankshaft rotating speed is collected through a crankshaft rotating speed sensor, the other end of the transmission shaft is connected with a motor rotor, the rotating speed of the rotor is collected through the motor rotating speed sensor, and the rotating speeds of the two are basically consistent under the normal connection condition. When the transmission shaft is broken, the fault is judged if the difference value of the rotating speeds of the transmission shaft and the transmission shaft exceeds a threshold value. In addition, the condition that the response of a generator speed sensor is slower than that of a crankshaft speed sensor in the starting process of the engine and the signal transmission rates of the generator speed sensor and the crankshaft speed sensor are different in the CAN communication is considered, a first-order filtering algorithm is adopted to process two speed signals (shown as a formula (1) and a formula (2)), and then difference judgment is carried out (shown as a formula (3)).
According to the method for detecting the shaft breakage fault of the transmission shaft of the vehicle generator, the received engine crankshaft rotation speed signal and the received generator rotor rotation speed signal are subjected to first-order filtering denoising, the two filtered rotation speed signals are subjected to subtraction, the absolute value of the difference value is obtained, the absolute value of the difference value is compared with the preset threshold value, whether the shaft breakage fault occurs on the transmission shaft of the generator is finally determined, the transmission shaft breakage fault can be maintained in time after the shaft breakage fault occurs, the engine is stopped or limited in torsion, and the occurrence of major traffic accidents is effectively avoided.
The implementation basis of the various embodiments of the present invention is realized by programmed processing performed by a device having a processor function. Therefore, in engineering practice, the technical solutions and functions thereof of the embodiments of the present invention can be packaged into various modules. Based on the actual situation, on the basis of the above embodiments, embodiments of the present invention provide a device for detecting a shaft breakage fault of a transmission shaft of a vehicle generator, which is used for executing the method for detecting a shaft breakage fault of a transmission shaft of a vehicle generator in the above method embodiments. Referring to fig. 2, the apparatus includes: the first main module is used for detecting an engine crankshaft rotating speed signal and a generator rotor rotating speed signal in real time and receiving the engine crankshaft rotating speed signal and the generator rotor rotating speed signal; the second main module is used for carrying out first-order filtering and denoising on the received engine crankshaft rotating speed signal and the generator rotor rotating speed signal, making a difference between the filtered engine crankshaft rotating speed signal and the filtered generator rotor rotating speed signal, and obtaining a speed difference absolute value by taking an absolute value of the difference; and the third main module is used for determining that the generator transmission shaft is broken if the absolute value of the speed difference exceeds a preset threshold value.
The device for detecting the broken shaft fault of the transmission shaft of the vehicle generator, provided by the embodiment of the invention, adopts a plurality of modules in the figure 2, performs first-order filtering and denoising on a received engine crankshaft rotation speed signal and a received generator rotor rotation speed signal, makes a difference between the two filtered rotation speed signals, obtains a speed difference absolute value by taking an absolute value of a difference value, compares the speed difference absolute value with a preset threshold value, and finally determines whether the transmission shaft of the generator has the broken shaft fault or not.
It should be noted that, the apparatus in the apparatus embodiment provided by the present invention may be used for implementing methods in other method embodiments provided by the present invention, except that corresponding function modules are provided, and the principle of the apparatus embodiment provided by the present invention is basically the same as that of the apparatus embodiment provided by the present invention, so long as a person skilled in the art obtains corresponding technical means by combining technical features on the basis of the apparatus embodiment described above, and obtains a technical solution formed by these technical means, on the premise of ensuring that the technical solution has practicability, the apparatus in the apparatus embodiment described above may be modified, so as to obtain a corresponding apparatus class embodiment, which is used for implementing methods in other method class embodiments. For example:
based on the content of the above device embodiment, as an optional embodiment, the device for detecting a broken shaft fault of a transmission shaft of a vehicle generator provided in the embodiment of the present invention further includes: the first submodule is used for realizing real-time detection of the engine crankshaft speed signal, and comprises: and detecting a rotating speed signal of the crankshaft of the engine in real time by adopting an engine controller ECU.
Based on the content of the above device embodiment, as an optional embodiment, the device for detecting a broken shaft fault of a transmission shaft of a vehicle generator provided in the embodiment of the present invention further includes: the second submodule is used for realizing the real-time detection of the rotating speed signal of the generator rotor, and comprises: and detecting a rotating speed signal of a generator rotor in real time by adopting a generator controller MCU.
Based on the content of the above device embodiment, as an optional embodiment, the device for detecting a broken shaft fault of a transmission shaft of a vehicle generator provided in the embodiment of the present invention further includes: the third submodule piece, is used for realizing the receipt engine crankshaft rotational speed signal and generator rotor rotational speed signal includes: the hybrid controller HCM receives the engine crankshaft rotating speed signal and the generator rotor rotating speed signal through two CAN buses respectively.
Based on the content of the above device embodiment, as an optional embodiment, the device for detecting a broken shaft fault of a transmission shaft of a vehicle generator provided in the embodiment of the present invention further includes: the fourth submodule is used for realizing the first-order filtering and denoising of the received engine crankshaft rotating speed signal, and comprises:
Y(n)＝a1X(n)+(1-a1)Y(n-1)
wherein, Y (n) is the nth engine crankshaft rotating speed signal filtering output value; a1 is the filtering coefficient of the engine crankshaft speed signal; x (n) is a sampled value of the nth engine crankshaft speed signal; y (n-1) is the filtered output value of the crankshaft speed signal of the engine at the (n-1) th time.
Based on the content of the above device embodiment, as an optional embodiment, the device for detecting a broken shaft fault of a transmission shaft of a vehicle generator provided in the embodiment of the present invention further includes: the fifth submodule is used for realizing the first-order filtering and denoising of the received generator rotor speed signal, and comprises:
M(n)＝a2N(n)+(1-a2)M(n-1)
wherein, M (n) is the nth generator rotor speed signal filtering output value; a2 is a filtering coefficient of a generator rotor speed signal; n (n) is a sampled value of the nth generator rotor speed signal; m (n-1) is the filtered output value of the rotation speed signal of the generator rotor at the (n-1) th time.
Based on the content of the above device embodiment, as an optional embodiment, the device for detecting a broken shaft fault of a transmission shaft of a vehicle generator provided in the embodiment of the present invention further includes: the sixth submodule is configured to determine that a generator transmission shaft is broken if the absolute value of the speed difference exceeds a preset threshold, and includes:
|Y(n)-M(n)|＞L
wherein, L is a preset threshold value.
The method of the embodiment of the invention is realized by depending on the electronic equipment, so that the related electronic equipment is necessarily introduced. To this end, an embodiment of the present invention provides an electronic apparatus, as shown in fig. 3, including: the system comprises at least one processor (processor), a communication Interface (communication Interface), at least one memory (memory) and a communication bus, wherein the at least one processor, the communication Interface and the at least one memory are communicated with each other through the communication bus. The at least one processor may invoke logic instructions in the at least one memory to perform all or a portion of the steps of the methods provided by the various method embodiments described above.
In addition, the logic instructions in the at least one memory may be implemented in software functional units and stored in a computer readable storage medium when sold or used as a stand-alone product. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the method embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. Based on this recognition, each block in the flowchart or block diagrams may represent a module, a program segment, or a portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In this patent, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for detecting a broken shaft fault of a transmission shaft of a vehicle generator is characterized by comprising the following steps: detecting an engine crankshaft rotating speed signal and a generator rotor rotating speed signal in real time, and receiving the engine crankshaft rotating speed signal and the generator rotor rotating speed signal; carrying out first-order filtering and denoising on the received engine crankshaft rotating speed signal and the generator rotor rotating speed signal, carrying out difference on the filtered engine crankshaft rotating speed signal and the filtered generator rotor rotating speed signal, and obtaining a speed difference absolute value by taking an absolute value of a difference value; and if the absolute value of the speed difference exceeds a preset threshold value, determining that the transmission shaft of the generator is broken.
2. The method for detecting the shaft breakage fault of the transmission shaft of the vehicle generator according to claim 1, wherein the detecting the rotation speed signal of the crankshaft of the engine in real time comprises the following steps: and detecting a rotating speed signal of the crankshaft of the engine in real time by adopting an engine controller ECU.
3. The method for detecting the shaft breakage fault of the transmission shaft of the vehicle generator according to claim 2, wherein the step of detecting the rotating speed signal of the generator rotor in real time comprises the following steps: and detecting a rotating speed signal of a generator rotor in real time by adopting a generator controller MCU.
4. The method for detecting the shaft breakage fault of the transmission shaft of the vehicle generator according to claim 3, wherein the receiving of the engine crankshaft speed signal and the generator rotor speed signal comprises: the hybrid controller HCM receives the engine crankshaft rotating speed signal and the generator rotor rotating speed signal through two CAN buses respectively.
5. The method for detecting the shaft breakage fault of the transmission shaft of the vehicle generator as claimed in claim 4, wherein the step of performing first-order filtering and denoising on the received engine crankshaft speed signal comprises:
Y(n)＝a1X(n)+(1-a1)Y(n-1)
wherein, Y (n) is the nth engine crankshaft rotating speed signal filtering output value; a1 is the filtering coefficient of the engine crankshaft speed signal; x (n) is a sampled value of the nth engine crankshaft speed signal; y (n-1) is the filtered output value of the crankshaft speed signal of the engine at the (n-1) th time.
6. The method for detecting the shaft breakage fault of the transmission shaft of the vehicle generator as claimed in claim 5, wherein the step of performing first-order filtering and denoising on the received rotation speed signal of the generator rotor comprises the following steps:
M(n)＝a2N(n)+(1-a2)M(n-1)
wherein, M (n) is the nth generator rotor speed signal filtering output value; a2 is a filtering coefficient of a generator rotor speed signal; n (n) is a sampled value of the nth generator rotor speed signal; m (n-1) is the filtered output value of the rotation speed signal of the generator rotor at the (n-1) th time.
7. The method for detecting the shaft breakage fault of the transmission shaft of the vehicle generator according to claim 6, wherein determining that the shaft breakage of the transmission shaft of the generator occurs if the absolute value of the speed difference exceeds a preset threshold comprises:
|Y(n)-M(n)|＞L
wherein, L is a preset threshold value.
8. The utility model provides a disconnected axle fault detection device of automobile-used generator transmission shaft which characterized in that includes: the first main module is used for detecting an engine crankshaft rotating speed signal and a generator rotor rotating speed signal in real time and receiving the engine crankshaft rotating speed signal and the generator rotor rotating speed signal; the second main module is used for carrying out first-order filtering and denoising on the received engine crankshaft rotating speed signal and the generator rotor rotating speed signal, making a difference between the filtered engine crankshaft rotating speed signal and the filtered generator rotor rotating speed signal, and obtaining a speed difference absolute value by taking an absolute value of the difference; and the third main module is used for determining that the generator transmission shaft is broken if the absolute value of the speed difference exceeds a preset threshold value.
9. An electronic device, comprising:
at least one processor, at least one memory, and a communication interface; wherein,
the processor, the memory and the communication interface are communicated with each other;
the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform the method of any of claims 1 to 7.
10. A non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform the method of any one of claims 1 to 7.
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