CN101799361A - Fault diagnosis method and detection system of vehicle transmission - Google Patents
Fault diagnosis method and detection system of vehicle transmission Download PDFInfo
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Abstract
The invention relates to a fault diagnosis method and a detection system of a vehicle transmission. The method comprises the following steps of: (1) arranging the detection system comprising a magnetoelectric sensor, a temperature sensor, a pressure sensor, a pressure detection oil pipe, a pressure detection valve board, a signal conditioning box, a digital-analogue conversion module, a data acquisition module and a fault diagnosis module; (2) starting a detected vehicle to operate the transmission in neutral and starting the detection system at the same time; (3) sending the data, acquired by the sensors, of detected points into the fault diagnosis module for fault diagnosis by the acquisition module; (4) after the detection in neutral, switching the transmission gear and repeating step (3) until data acquisition and fault diagnosis at any gear position are completed; and (5) after the data acquisition and the fault diagnosis at any gear position are completed, outputting the results. The separation module in the signal conditioning box of the invention adopts an integrated circuit design, so that the volume of the conditioning box and the weight of the system are reduced, and the portability of the detection system is improved. The fault diagnosis method of the vehicle transmission can be widely applied in the fault diagnosis of wet clutch transmissions of various tracked vehicles.
Description
Technical field
The present invention relates to a kind of method for diagnosing faults and detection system, particularly about a kind of vehicle gear box method for diagnosing faults and detection system thereof that is used for endless-track vehicle wet clutch fixed shaft type.
Background technology
At present, integrating the wet clutch fixed axle gearbox that turns to the straight function is used widely at numerous endless-track vehicles, this wheel box is the organic synthesis of technology such as mechanical, electrical, liquid, have that hydrodynamic drive, hydraulic stepless turn to, technical characterstic such as power shifting and fluid drive, such wheel box has the handling characteristics of high power density, high compactedness and high reliability, its telotism, technical merit advanced person.When the wet clutch wheel box significantly improves the endless-track vehicle performance, many urgent problems have also been brought, wherein comparatively outstanding is exactly how the wheel box running status to be tested fast and controlled, good riding quality when guaranteeing its operate as normal, timely maintenance when breaking down sign and fault diagnosis and maintenance quickly and accurately when breaking down, these problems are for the overall performance of wheel box, life-span, can reliabilities etc. have material impact, in time grasp running status and be directly connected to the wheel box integrity in use and the performance of the various functions of vehicle.Therefore, research endless-track vehicle wheel box fault detection method, exploitation bicycle-mounted portable formula detection system is significant.
Summary of the invention
At the problems referred to above, the purpose of this invention is to provide a kind of easy to carry, simple to operate, scope of application extensively and the vehicle gear box method for diagnosing faults and the detection system thereof that can online in real time detect.
For achieving the above object, the present invention takes following technical scheme: a kind of vehicle gear box method for diagnosing faults, and its step is as follows: (1) is provided with a detection system that comprises magnetoelectric transducer, temperature sensor, pressure transducer, pressure measurement oil pipe, pressure measurement valve plate, signal process box, analog-to-digital conversion module, data acquisition module and fault diagnosis module; (2) start tested vehicle, make the transmission neutral operation, simultaneously the start detection system; (3) by data acquisition module the measured point data of each sensor acquisition are sent in the fault diagnosis module, carried out fault diagnosis, if diagnostic result is normal, storage of collected data then; If diagnostic result is unusual, then show failure message in real time, storage failure information; (4) finish neutral gear and detect after, then change the wheel box gear, the described process of repeating step (3) is until signals collecting and the fault diagnosis finished under all range states; (5) finish signals collecting and fault diagnosis under all range states after, according to image data and fault diagnosis record, generate this fault diagnosis report, and the output result.
Method for diagnosing faults in the described wheel box fault diagnosis module in the described step (3) may further comprise the steps: 1. the manipulation pressure signal that provides according to the wheel box front pump, gear shift sleeve pressure signal and lockup clutch pressure signal carry out the gear pressure detection, if each clutch pressure signal of tested gear is normal, then determine current gear signal; If unusual, then show failure message; 2. after current gear is determined, calculate when front gear box ratio of gear size; If result of calculation equals this gear ratio of gear, the normal and demonstration of then current range state; If result of calculation is not equal to this gear ratio of gear, then show failure message; 3. after showing current gear, detect steering hydraulic circuit force value and whether meet technical indicator, meet and show that then the steering state is normal; Do not meet and then show failure message; Whether normal, show then that normally corresponding each lubrication pressure state is normal if 4. detecting wheel box lubricating system lubrication pressure; The undesired failure message that then shows; Whether the force value that 5. detects the fluid torque-converter hydraulic circuit is in normal technical indicator, if force value shows that then the fluid torque-converter pressure state is normal in normal technical indicator; If force value exceeds the technical indicator scope, then show failure message; 6. store each acquired signal and failure message, and to select be to finish this fault detect or signals collecting is proceeded in gear shift, finish then to generate examining report and printout.
The pressure measurement position of described lubricating system comprises that a spindle oil is pressed, two spindle oils are pressed and three spindle oils are pressed three pressure measurement positions; The pressure measurement position of described steering comprises and turns to high pressure and turn to the low pressure line oil pressure; The pressure measurement position of described fluid torque-converter comprises three pressure measurement positions of locking oil pressure of inlet oil pressure, outlet oil pressure and fluid torque-converter.
A kind of vehicle speed variation box fault diagnosis detection system that realizes said method, it is characterized in that: it comprises that one contains the fixed axle gearbox of a plurality of wet clutches, and input shaft speed measuring gear, a measure speed gears, two measure speed gearses and three measure speed gearses are sent into the measure speed gears signal in one signal process box in the described wheel box behind magnetoelectric transducer; Lubricating system in the described wheel box is connected with a pressure measurement oil pipe with a temperature sensor respectively, and gear shift sleeve, steering, fluid torque-converter and lockup clutch in the described wheel box are introduced one through a pressure measurement oil pipe respectively with pressure oil and are fixed in the pressure measurement valve plate at described wheel box top, described pressure measurement valve plate top is provided with the pressure measuring tie-in that is used to connect described pressure transducer, and described pressure transducer is imported the fuel injection pressure signal that collects in the described signal process box; The output terminal of described signal process box is sent into signal in one fault diagnosis module behind an analog-to-digital conversion module and a data acquisition module, and described signal process box is powered by a lithium power supply.
Be provided with a power-supply filter, a power distribution module, two low-pass filters, a frequency in the described signal process box and press modular converter, two voltage isolation modules and a resistance/voltage transformation module; Described power filtering module is imported the electric weight of described lithium power supply in the described power distribution module with after the output terminal of lithium power supply is connected; Described magnetoelectric transducer and pressure transducer respectively behind a described low-pass filter, are imported detected signal respectively described frequency and are pressed in a modular converter and the described voltage isolation module; Described temperature sensor behind described resistance/voltage transformation module, is imported detected signal in another described voltage isolation module, and all signals are gathered by described modulus acquisition module.
Described lithium power supply adopts the portable lithium power supply of 24V.
Be connected by rapid-acting coupling respectively between each described pressure measurement oil pipe and described wheel box and the pressure measurement valve plate.
Described analog-to-digital conversion module adopts the single channel flank speed to reach the high speed PXI analog-to-digital conversion card of 1M.
The present invention is owing to take above technical scheme, it has the following advantages: 1, the present invention is because signal process box internal insulation module adopts the integrated circuit design, it is long-pending to have dwindled the conditioning casing, alleviated system weight, A/D conversion module, signal acquisition module and fault diagnosis module adopt integrated design and unified encapsulation, have therefore improved the portability of detection system.2, the present invention does not need external vehicle power supply owing to adopt stable lithium power supply to power separately in the real vehicle road test process, has therefore reduced the interference of power supply to acquired signal, has improved the accuracy of signal quality and diagnosis.3, the present invention is owing to adopt wheel box hydraulic oil to transfer into the pressure measurement valve plate through the flexible high pressure oil pipe, pressure tap place setting pressure sensor on the pressure measurement valve plate, switching oil pipe and pressure measurement valve plate play the pressure buffer effect, thereby compression shock is to the damage of sensor when having reduced gear-change operation, has improved reliability and serviceable life that pressure sensor signal is gathered.4, the signal of the present invention's detection comprises pressure, rotating speed and temperature, and quantity is more, and the measuring point broad covered area has been contained wheel box main performance monitoring content.5, therefore the present invention has guaranteed the signal conversion process real-time because the A/D modular converter adopts the single channel flank speed to reach the high speed PXI analog-to-digital conversion card of 1M.6, the present invention is because data acquisition module adopts the portable PXI cabinet and the input of 24V direct supply of more stable and stronger, power supply is provided by signal process box, has therefore further improved the intuitive that system's navigability, result show, the reliability and the portability of system.7, the present invention carries out input because the fault diagnosis module that adopts is based on the wheel box technical indicator, therefore can show diagnostic result, failure code and trouble location in real time, diagnostic procedure is quick, the diagnostic result intuitive display, understandable, system operation is easy.The present invention can be widely used in the various endless-track vehicle wet clutch wheel box fault diagnosises.
Description of drawings
Fig. 1 is a fault diagnosis system structural representation of the present invention,
Fig. 2 is a signal process box structural representation of the present invention,
Fig. 3 is system works flow process figure of the present invention,
Fig. 4 is a Troubleshooting Flowchart of the present invention.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in detail.
As shown in Figure 1, the present invention includes a fixed axle gearbox 1 that contains a plurality of wet clutches, input shaft speed measuring gear 2 in the wheel box 1, measure speed gears 3, two measure speed gearses 4 and three measure speed gearses 5 are sent into the measure speed gears signal in one signal process box 7 behind magnetoelectric transducer 6; Lubricating system 8 in the wheel box 1 is connected with a pressure measurement oil pipe 10 with a temperature sensor 9 respectively, and the gear shift sleeve device 11 in the wheel box 1, steering 12, fluid torque-converter 13 and lockup clutch 14 with pressure oil respectively through a pressure measurement oil pipe 10 introduce one by the pressure measurement valve plate 15 that is bolted to wheel box 1 top in, pressure measurement valve plate 15 tops are provided with 15 pressure measuring tie-ins (figure does not mark) that are used for connecting pressure transducer 16, pressure measurement oil pipe 10 and pressure measurement valve plate 15 can play the pressure buffer effect, thereby compression shock is to the damage of each sensor, the dependability and the serviceable life of having improved each sensor when reducing gear-change operation.Pressure transducer 16 is with in the fuel injection pressure signal input signal conditioning case 7 that collects.All the sensors all passes through detected signal in the cable input signal conditioning case 7, nurse one's health and remove undesired signal, signal after the conditioning by the output terminal of signal process box 7 behind an A/D conversion module (analog/digital conversion module) 17 and one data acquisition module 18, send in the fault diagnosis module 19 and carry out fault diagnosis, diagnostic result prints output by an output module 20.Wherein, signal process box 7 is by a lithium power supply 21 power supplies.
In the foregoing description, lithium power supply 21 adopts the portable lithium power supply of 24V, and the capacity of the portable lithium power supply 21 of 24V can guarantee that whole system stable operation is more than 3 hours.
As shown in Figure 2, be provided with a power-supply filter 22, power distribution module 23, two low-pass filters 24, frequency in the signal process box 7 of the present invention and press modular converter 25, two voltage isolation modules 26 and resistance/voltage transformation modules 27.Power filtering module 22 is connected with the output terminal of portable lithium power supply 21, behind the 24V voltage filter clutter with 21 supplies of lithium power supply, in the input power distribution module 23, assigned the power supply of each sensor, signal process box 7, A/D acquisition module 17 and fault diagnosis module 19 by power distribution module 23.Magnetoelectric transducer 6 and pressure transducer 16 with detected signal respectively behind a low-pass filter 24, filtering high frequency clutter, input is pressed in a modular converter 25 and the voltage isolation module 26 frequently respectively, respectively signal is finished frequency and is isolated the output of removal back to the conversion and the undesired signal of magnitude of voltage; Temperature sensor 9 behind resistance/voltage transformation module 27, is imported another voltage isolation module 26 back outputs with detected signal, and all signals are gathered by A/D acquisition module 17.
In the foregoing description, be connected by rapid-acting coupling respectively between pressure measurement oil pipe 10 and wheel box 1 and the pressure measurement valve plate 15, pressure measurement oil pipe 10 adopts the high-pressure oil pipe of the highest anti-50Mp.
In the foregoing description, the gear shift sleeve 11 of wheel box inside is respectively six wet type gear shift sleeves that are distributed on, two and three.
In the foregoing description, A/D modular converter 17 adopts the single channel flank speed to reach the high speed PXI analog-to-digital conversion card of 1M.
As shown in Figure 3, the present invention is based on wheel box practical structures characteristics and every technical indicator, utilizes signals collecting and fault diagnosis technology, realizes online detection and diagnosis to endless-track vehicle wet clutch fixed axle gearbox, and its step is as follows:
(1) starts tested vehicle, make the transmission neutral operation of tested vehicle, open the lithium power supply, simultaneously the start detection system;
(2) each the measured point data that will gather of each magnetoelectric transducer, temperature sensor and pressure transducer, behind signal process box conditioning input A/D conversion module, carry out data acquisition by data acquisition module, image data is sent into and is carried out fault diagnosis in the fault diagnosis module, if diagnostic result is normal, storage of collected data then; If diagnostic result shows the wheel box fault, then show failure message in real time, and finish failure code storage and acquired data storage;
(3) finish neutral gear and detect after, fault diagnosis system will point out the neutral gear signal storage to finish, and whether will proceed signals collecting, change the wheel box gear at this moment, the described process of repeating step (2) is until signals collecting and the fault diagnosis finished under all gears;
(4) finish signals collecting and fault diagnosis under all gears after, fault diagnosis system will generate this fault diagnosis report according to image data and fault diagnosis record, and can the printout result.
As shown in Figure 4, the method for diagnosing faults in the wheel box fault diagnosis module in the above-mentioned steps (2) may further comprise the steps:
(1) the manipulation pressure signal that at first provides according to the wheel box front pump, gear shift sleeve pressure signal and lockup clutch pressure signal carry out the gear pressure detection, if each clutch pressure signal of tested gear is normal, then can determine when the front gear box gear; If unusual, then carry out the big small records of abnormal signal amplitude, show current gear abnormal signal failure message;
(2) after current gear is determined,, convert and demonstrate current input speed of wheel box and speed of a motor vehicle numerical value according to input shaft speed measuring gear rotational speed of gathering and three measure speed gears rotating speed, simultaneously according to the input and output revolution speed calculating when front gear box ratio of gear size; If the ratio of gear that calculates equals this gear ratio of gear, show that then current range state is normal; If the ratio of gear that calculates is not equal to this gear ratio of gear, then the particular location of rotating speed fault occurs, and show fault diagnosis result information according to input speed, a rotating speed, two rotating speeds and three tach signal diagnosis;
(3) show after the current gear, detect steering high-pressure outlet and low-pressure inlet hydraulic circuit force value one by one, if high-low pressure oil circuit force value in the technical indicator scope, shows that then steering pressure is normal; If high-low pressure oil circuit force value exceeds the technical indicator scope, then write down and show the exceed standard position and the numerical value that specifically exceeds standard;
(4) after steering detects normally, whether detect wheel box lubricating system lubrication pressure normal, the main lubrication pressure of measuring one, two of transmissions and three is if each lubrication pressure value in normal technical indicator scope, shows then that corresponding each lubrication pressure state is normal; If each lubrication pressure value exceeds the technical indicator scope, then write down and show lubrication pressure trouble location and concrete numerical value;
TTS Transmission Temperature Switch is installed among the lubricating system hydraulic circuit, is being lubricated the system pressure detection simultaneously, and fault diagnosis system will show the wheel box Temperature numerical;
(5) after lubricating system detects normally, fluid torque-converter inlet oil pressure and outlet oil pressure are detected, oil pressure, outlet oil pressure and the two pressure difference value show that then the fluid torque-converter pressure state is normal within normal technical indicator if torque converter enters the mouth; If force value exceeds the technical indicator scope, then write down and show torque converter pressure trouble location and concrete numerical value;
(6) store each acquired signal and failure message, signals collecting and the fault diagnosis under the current gear finished in prompting simultaneously, whether finishes this fault detect or do not need gear shift to proceed signals collecting; If select to finish this fault detect, then generate examining report and printout.
In the above steps, the pressure measurement position of lubricating system comprises that a spindle oil is pressed, two spindle oils are pressed and three spindle oils are pressed three pressure measurement positions; The pressure measurement position of steering comprises and turns to high pressure and turn to the low pressure line oil pressure; The pressure measurement position of fluid torque-converter comprises three pressure measurement positions of locking oil pressure of inlet oil pressure, outlet oil pressure and fluid torque-converter.
The various embodiments described above only are preferred implementations of the present invention, and are every based on the changes and improvements on the technical solution of the present invention in the present technique field, should not get rid of outside protection scope of the present invention.
Claims (10)
1. vehicle gear box method for diagnosing faults, its step is as follows:
(1) detection system that comprises magnetoelectric transducer, temperature sensor, pressure transducer, pressure measurement oil pipe, pressure measurement valve plate, signal process box, analog-to-digital conversion module, data acquisition module and fault diagnosis module is set;
(2) start tested vehicle, make the transmission neutral operation, simultaneously the start detection system;
(3) by data acquisition module the measured point data of each sensor acquisition are sent in the fault diagnosis module, carried out fault diagnosis, if diagnostic result is normal, storage of collected data then; If diagnostic result is unusual, then show failure message in real time, storage failure information;
(4) finish neutral gear and detect after, then change the wheel box gear, the described process of repeating step (3) is until signals collecting and the fault diagnosis finished under all range states;
(5) finish signals collecting and fault diagnosis under all range states after, according to image data and fault diagnosis record, generate this fault diagnosis report, and the output result.
2. a kind of vehicle gear box method for diagnosing faults as claimed in claim 1 is characterized in that: the method for diagnosing faults in the described wheel box fault diagnosis module in the described step (3) may further comprise the steps:
1. the manipulation pressure signal that provides according to the wheel box front pump, gear shift sleeve pressure signal and lockup clutch pressure signal carry out the gear pressure detection, if each clutch pressure signal of tested gear is normal, then determine current gear signal; If unusual, then show failure message;
2. after current gear is determined, calculate when front gear box ratio of gear size; If result of calculation equals this gear ratio of gear, the normal and demonstration of then current range state; If result of calculation is not equal to this gear ratio of gear, then show failure message;
3. after showing current gear, detect steering hydraulic circuit force value and whether meet technical indicator, meet and show that then the steering state is normal; Do not meet and then show failure message;
Whether normal, show then that normally corresponding each lubrication pressure state is normal if 4. detecting wheel box lubricating system lubrication pressure; The undesired failure message that then shows;
Whether the force value that 5. detects the fluid torque-converter hydraulic circuit is in normal technical indicator, if force value shows that then the fluid torque-converter pressure state is normal in normal technical indicator; If force value exceeds the technical indicator scope, then show failure message;
6. store each acquired signal and failure message, and to select be to finish this fault detect or signals collecting is proceeded in gear shift, finish then to generate examining report and printout.
3. a kind of vehicle gear box method for diagnosing faults as claimed in claim 2 is characterized in that: the pressure measurement position of described lubricating system comprises that a spindle oil is pressed, two spindle oils are pressed and three spindle oils are pressed three pressure measurement positions; The pressure measurement position of described steering comprises and turns to high pressure and turn to the low pressure line oil pressure; The pressure measurement position of described fluid torque-converter comprises three pressure measurement positions of locking oil pressure of inlet oil pressure, outlet oil pressure and fluid torque-converter.
4. a realization is as the vehicle speed variation box fault diagnosis detection system of method as described in claim 1 or 2 or 3, it is characterized in that: it comprises that one contains the fixed axle gearbox of a plurality of wet clutches, and input shaft speed measuring gear, a measure speed gears, two measure speed gearses and three measure speed gearses are sent into the measure speed gears signal in one signal process box in the described wheel box behind magnetoelectric transducer; Lubricating system in the described wheel box is connected with a pressure measurement oil pipe with a temperature sensor respectively, and gear shift sleeve, steering, fluid torque-converter and lockup clutch in the described wheel box are introduced one through a pressure measurement oil pipe respectively with pressure oil and are fixed in the pressure measurement valve plate at described wheel box top, described pressure measurement valve plate top is provided with the pressure measuring tie-in that is used to connect described pressure transducer, and described pressure transducer is imported the fuel injection pressure signal that collects in the described signal process box; The output terminal of described signal process box is sent into signal in one fault diagnosis module behind an analog-to-digital conversion module and a data acquisition module, and described signal process box is powered by a lithium power supply.
5. a kind of vehicle speed variation box fault diagnosis detection system as claimed in claim 4 is characterized in that: be provided with a power-supply filter, a power distribution module, two low-pass filters, a frequency in the described signal process box and press modular converter, two voltage isolation modules and a resistance/voltage transformation module;
Described power filtering module is imported the electric weight of described lithium power supply in the described power distribution module with after the output terminal of lithium power supply is connected; Described magnetoelectric transducer and pressure transducer respectively behind a described low-pass filter, are imported detected signal respectively described frequency and are pressed in a modular converter and the described voltage isolation module; Described temperature sensor behind described resistance/voltage transformation module, is imported detected signal in another described voltage isolation module, and all signals are gathered by described modulus acquisition module.
6. a kind of vehicle speed variation box fault diagnosis detection system as claimed in claim 4 is characterized in that: described lithium power supply adopts the portable lithium power supply of 24V.
7. a kind of vehicle speed variation box fault diagnosis detection system as claimed in claim 5 is characterized in that: described lithium power supply adopts the portable lithium power supply of 24V.
8. as claim 4 or 5 or 6 or 7 described a kind of vehicle speed variation box fault diagnosis detection systems, it is characterized in that: be connected by rapid-acting coupling respectively between each described pressure measurement oil pipe and described wheel box and the pressure measurement valve plate.
9. as claim 4 or 5 or 6 or 7 described a kind of vehicle speed variation box fault diagnosis detection systems, it is characterized in that: described analog-to-digital conversion module adopts the single channel flank speed to reach the high speed PXI analog-to-digital conversion card of 1M.
10. a kind of vehicle speed variation box fault diagnosis detection system as claimed in claim 8 is characterized in that: described analog-to-digital conversion module adopts the single channel flank speed to reach the high speed PXI analog-to-digital conversion card of 1M.
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