CN102915033A - Vehicle fault diagnosing system and engineering machine - Google Patents
Vehicle fault diagnosing system and engineering machine Download PDFInfo
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- CN102915033A CN102915033A CN2012104471743A CN201210447174A CN102915033A CN 102915033 A CN102915033 A CN 102915033A CN 2012104471743 A CN2012104471743 A CN 2012104471743A CN 201210447174 A CN201210447174 A CN 201210447174A CN 102915033 A CN102915033 A CN 102915033A
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Abstract
The invention provides a vehicle fault diagnosing system. The vehicle fault diagnosing system comprises at least one master controller, at least one slave controller and a fault output device, wherein each slave controller is connected to a corresponding master controller, and the master controller is connected to the fault output device. The slave controller is connected to at least one object to be detected and used for detecting an operation state of the object to be detected and sending a detected result to the master controller, and/or the master controller is connected to at least one object to be detected and used for detecting the operation state of the object to be detected. The master controller outputs, generates or receives the detected result through the fault output device. The invention further provides an engineering machine. By means of the technical scheme, the internal wiring layout of the system can be simplified, and the fault diagnosing speed and the accuracy rate are improved.
Description
Technical field
The present invention relates to the car fault diagnosis technical field, in particular to a kind of vehicle breakdown diagnostic system and a kind of engineering machinery.
Background technology
The working environment of pump truck is quite abominable, needs in time maintenance in order to avoid break down, and because the fault type of pump truck complex structure, generation is more and fault between logical relation comparatively complicated, thereby the fault diagnosis that causes pump truck and maintenance difficulty comparatively.
At present, the fault diagnosis of pump truck mainly is the reason of judging by rule of thumb initiation pump truck fault by the maintenance personal, the method for artificial judgment fault, and the accuracy of fault diagnosis is lower, so that efficient and the success ratio of maintenance are lower; And part adopts the system of intelligent diagnostics, the internal system complex circuit, and diagnostic method is single, and diagnosis speed and accuracy rate of diagnosis are all undesirable.
Therefore, need a kind of new fault diagnosis system, can simplify the internal system circuit and lay, improve speed and the accuracy rate of fault diagnosis.
Summary of the invention
The present invention just is being based on the problems referred to above, has proposed a kind of vehicle breakdown diagnostic system, can simplify the internal system circuit and lay, and improves speed and the accuracy rate of fault diagnosis.
In view of this, the present invention proposes a kind of vehicle breakdown diagnostic system, comprise: at least one master controller, at least one is from controller and fault output device, wherein: each is described to be connected to corresponding master controller from controller, and described master controller is connected to described fault output device; Describedly be connected at least one object to be measured from controller, be used for the running status of described object to be measured is detected, and testing result is sent to described master controller, and/or described master controller is connected at least one described object to be measured, is used for the running status of described object to be measured is detected; And described master controller is exported the testing result that generates or receive by described fault output device.
In this technical scheme, system adopts primary and secondary structure, near the master controller object to be measured detects by master controller, for the object to be measured away from master controller, then arrange from controller in its vicinity, and by from controller near object to be measured being detected, the mode of this integrated diagnosis has reduced the complexity that system line is laid, be conducive to the probability that the reduction system breaks down, improved diagnosis speed and accuracy rate.
In technique scheme, preferably, described object to be measured comprises: be connected to described master controller or described system line or detection part from controller, described master controller or describedly from controller the process that the object to be measured that is attached thereto carries out condition monitoring is comprised then: described master controller or describedly obtain detection signal from controller from the object to be measured that links to each other, and when the rate of change of the value of described detection signal or value does not meet preset rules, judge that described object to be measured is in the operation troubles state; And/or described master controller or describedly obtain periodic heartbeat frame signal from controller from the object to be measured that links to each other, if described controller does not receive described heartbeat frame signal or receiving cycle does not meet predetermined period, judge that then described object to be measured is in the operation troubles state.
In this technical scheme, adopt the diagnostic method that adapts with it for different objects to be measured, can effectively improve efficient and the accuracy rate of diagnosis.
In technique scheme, preferably, described object to be measured comprises: be connected to described master controller or described execution unit from controller, then described master controller is according to described testing result, generate corresponding tree-shaped logic diagram, and export by described fault output device.
In this technical scheme, can show visually failure message by fault output device, be convenient to observation and the diagnosis of fault.Preferably, can show testing result by tree-shaped logic diagram here, be convenient to the maintenance personal by totally checking the trouble spot to part, the analysis of failure probability has improved the accuracy rate of diagnosis, and has improved the comfort level of maintenance.
In above-mentioned arbitrary technical scheme, preferably, also comprise: described master controller with described from being connected by at least one bus line between the controller.
In this technical scheme, master controller with can be connected by many CAN buses and/or RS485 bus from controller, further, can adopt CAN and the communication of RS485 dual bus, when a bus failure, can switch to another bus and proceed work, improve system's reliability of operation.
In above-mentioned arbitrary technical scheme, preferably, also comprise: described master controller obtains periodic heartbeat frame signal from what link to each other from controller, if described master controller does not receive described heartbeat frame signal or receiving cycle does not meet predetermined period, then judge describedly to be in the operation troubles state from bus node corresponding to controller.
In above-mentioned arbitrary technical scheme, preferably, also comprise: when the quantity of the bus node that is in the operation troubles state during more than or equal to the predetermined number threshold value, described master controller judges that described bus line breaks down.
In this technical scheme, if interior master controller of the schedule time is received the heartbeat frame from controller, judge that then bus is normal, bus error is counted zero clearing; If master controller is not received the heartbeat frame from controller in the schedule time, then the bus error counting adds one, when bus error is added to the predetermined number threshold value, judges bus failure, and with corresponding bus failure communication to fault output device.
In above-mentioned arbitrary technical scheme, preferably, comprise that also at least one is connected to described son from controller from controller, and at least one is connected to described son from the object to be measured of controller, then described son also is used for from controller: the running status to the object to be measured that is attached thereto detects, and testing result is sent to corresponding from controller, to be sent to corresponding master controller by described from controller.
In this technical scheme, son can be set further from controller, be connected to from controller, in order to son is connected to son from controller near the object to be measured controller, and detect from controller by son, thereby further reduce the complexity of internal system structure, improve the speed of diagnosis and the accuracy rate of diagnosis.
In above-mentioned arbitrary technical scheme, preferably, described from controller and described son from being connected by at least one bus line between the controller.
In this technical scheme, can be connected by CAN bus and/or RS485 bus from controller with son from controller, further, can adopt CAN and the communication of RS485 dual bus, when a bus failure, can switch to another bus and proceed work, improve system's reliability of operation.
In above-mentioned arbitrary technical scheme, preferably, also comprise: describedly obtain periodic heartbeat frame signal from the son that links to each other from controller from controller, if describedly do not receive described heartbeat frame signal or receiving cycle does not meet predetermined period from controller, judge that then described son is in the operation troubles state from bus node corresponding to controller.
According to another aspect of the invention, also propose a kind of engineering machinery, comprised the described vehicle breakdown diagnostic system of above-mentioned arbitrary technical scheme.
By above technical scheme, can simplify the internal system circuit and lay, improve speed and the accuracy rate of fault diagnosis.
Description of drawings
Figure 1A to Fig. 1 E shows the according to an embodiment of the invention structural representation of vehicle breakdown diagnostic system;
Fig. 2 shows according to an embodiment of the invention, and fault output device shows schematic diagram.
Embodiment
In order more clearly to understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments the present invention is further described in detail.Need to prove, in the situation that do not conflict, the application's embodiment and the feature among the embodiment can make up mutually.
A lot of details have been set forth in the following description so that fully understand the present invention; but; the present invention can also adopt other to be different from other modes described here and implement, and therefore, protection scope of the present invention is not subjected to the restriction of following public specific embodiment.
Figure 1A to Fig. 1 E shows the according to an embodiment of the invention structural representation of vehicle breakdown diagnostic system.
Shown in Figure 1A, vehicle breakdown diagnostic system comprises: at least one master controller 102, at least one is from controller 104 and fault output device 106, wherein: each is connected to corresponding master controller 102 from controller 104, and master controller 102 is connected to fault output device 106; Be connected at least one object 110 to be measured from controller 104, be used for the running status of object 110 to be measured is detected, and testing result is sent to master controller 102, and/or master controller 102 is connected at least one object 110 to be measured, is used for the running status of object 110 to be measured is detected; And master controller 102 is exported the testing result that generates or receive by fault output device 106.
In this technical scheme, system adopts primary and secondary structure, near the master controller 102 object to be measured 110 detects by master controller, for the object to be measured 110 away from master controller 102, then arrange in its vicinity from controller 104, and by detecting near the object to be measured 110 104 pairs of the controllers, the mode of this integrated diagnosis has reduced the complexity that system line is laid, be conducive to the probability that the reduction system breaks down, improved diagnosis speed and accuracy rate.
In technique scheme, object 110 to be measured comprises: be connected to master controller 102 or from system line or the detection part of controller 104, then master controller 102 or the process of carrying out condition monitoring from the object to be measured 110 that 104 pairs of controllers are attached thereto comprise: master controller 102 or obtain detection signal from the object to be measured 110 that links to each other from controller 104, and when the rate of change of the value of detection signal or value does not meet preset rules, judge that object 110 to be measured is in the operation troubles state; And/or master controller 102 or obtain periodic heartbeat frame signal from the object to be measured 110 that links to each other from controller 104, if controller does not receive the heartbeat frame signal or receiving cycle does not meet predetermined period, judge that then object 110 to be measured is in the operation troubles state.
In this technical scheme, adopt the diagnostic method that adapts with it for different object to be measured 110, can effectively improve efficient and the accuracy rate of diagnosis.
Concrete, for the insurance line diagnosis, one end that insurance and electric component can be linked to each other is connected by the digital input port of reduction voltage circuit and controller (can be master controller, from controller or sub from controller), insuring normal Time Controller digital input port is high level, when fuse circuit breaking, the digital input port of controller is low level, and controller logic is judged as the insurance line broken circuit and sends failure message to fault output device 106.
Diagnosis for outlet line, the output port of controller can external logic judging circuit and booster circuit, an output port feedback of status is arranged, in the circuit when outlet line is opened a way, controller output low level feedback logic is high level, and output port voltage is greater than scheduled voltage; When outlet line and ground short circuit, controller output high level feedback logic is low level; When outlet line and power supply short circuit, controller output low level feedback logic is high level.Thus diagnosable controller export to the outlet line open circuit, shorted to earth of the devices such as relay, solenoid valve, to the power supply short circuit fault, controller sends failure message to fault output device 106.
Particularly, the circuit diagram of the external logic judging circuit of controller output port and booster circuit is provided with the feedback of status of input port, output port and an output port as shown in Figure 1B in the circuit, and its feedback logic is as shown in table 1.
Table 1
When outlet line was opened a way, controller output low level feedback logic was high level, and output port voltage is greater than 2.7V; When outlet line and ground short circuit Time Controller output high level feedback logic is low level; When outlet line and power supply short circuit Time Controller output low level feedback logic are high level.Thus diagnosable controller export to the outlet line open circuit, shorted to earth of the devices such as relay, solenoid valve, to the power supply short circuit fault.Controller sends corresponding outlet line fault number to fault output device 106.
For the diagnosis of sensor, can move respective algorithms by controller and diagnose.Can adopt the codomain criterion for work sensor signal within the specific limits, such as Fig. 1 C, step 202, whether judge the sensor signal value that gathers greater than the maximum preset value, if greater than, then judge sensor fault, if be not more than, then to step 204, whether judge the sensor signal value that gathers less than minimum preset value, if less than, then judge sensor fault, if be not less than, judge that then sensor is normal, and send deagnostic structure to fault output device 106.
Can adopt rate of change to judge for time varying signal, such as Fig. 1 D, step 206, judge that whether the sensor signal value that gathers in the Δ t1 time remains unchanged, if change, then is judged as sensor fault, if remain unchanged, then to step 208, judge whether the sensor signal value that gathers in the Δ t2 time step variation has occured, if occured, be judged as sensor fault, if do not occur, then be judged as sensor normal, and send deagnostic structure to fault output device 106.Certainly, the step 206 here and step 208 also can transposing order, as long as whether the detecting sensor signal value is in normal range, can judge that corresponding sensor is whether normal or break down.
Can adopt the heartbeat data diagnosis for the bus-type sensor, shown in Fig. 1 E, step 210, whether the heartbeat frame of judging the sensor transmission is unusual, if unusual, then is judged as sensor fault, if normal, then be judged as sensor normal, and send deagnostic structure to fault output device 106.
In technique scheme, object 110 to be measured comprises: be connected to master controller 102 or from the execution unit of controller 104, then master controller 102 generates corresponding tree-shaped logic diagram according to testing result, and exports by fault output device 106.
In this technical scheme, can show visually failure message by fault output device 106, be convenient to observation and the diagnosis of fault.Preferably, can show testing result by tree-shaped logic diagram here, be convenient to the maintenance personal by totally checking the trouble spot to part, the analysis of failure probability has improved the accuracy rate of diagnosis, and has improved the comfort level of maintenance.
In above-mentioned arbitrary technical scheme, also comprise: master controller 102 be connected by at least one bus line between the controller 104.
In this technical scheme, master controller 102 with can be connected by many CAN buses and/or RS485 bus from controller 104, further, can adopt CAN and the communication of RS485 dual bus, when a bus failure, can switch to another bus and proceed work, improve system's reliability of operation.
In technique scheme, also comprise: master controller 102 obtains periodic heartbeat frame signal from what link to each other from controller 104, if master controller 102 does not receive the heartbeat frame signal or receiving cycle does not meet predetermined period, then judge from the bus node of controller 104 correspondences to be in the operation troubles state.
In technique scheme, also comprise: when the quantity of the bus node that is in the operation troubles state during more than or equal to the predetermined number threshold value, master controller 102 judges that bus lines break down.
In this technical scheme, if master controller 102 is received heartbeat frame from controller 104 in the given time, judge that then bus is normal, bus error is counted zero clearing; If master controller 102 is not received the heartbeat frame from controller 104 in the schedule time, then the bus error counting adds one, when bus error is added to the predetermined number threshold value, judges bus failure, and with corresponding bus failure communication to fault output device 106.
In technique scheme, comprise that also at least one is connected to son from controller 104 from controller 108, and at least one is connected to son from the object to be measured 110 of controller 108, then son also is used for from controller 108: the running status to the object to be measured 110 that is attached thereto detects, and testing result is sent to corresponding to controller 104, with by be sent to corresponding master controller 102 from controller 104.
In this technical scheme, son can be set further from controller 108, be connected to from controller 104, in order to son is connected to son from controller 108 near the object to be measured 110 the controller 108, and detect from controller 108 by son, thereby further reduce the complexity of internal system structure, improve the speed of diagnosis and the accuracy rate of diagnosis.
In technique scheme, be connected by at least one bus line between the controller 108 with son from controller 104.
In this technical scheme, can be connected by CAN bus and/or RS485 bus from controller 108 with son from controller 104, further, can adopt CAN and the communication of RS485 dual bus, when a bus failure, can switch to another bus and proceed work, improve system's reliability of operation.
In technique scheme, also comprise: obtain periodic heartbeat frame signal from the son that links to each other from controller 108 from controller 104, if do not receive the heartbeat frame signal or receiving cycle does not meet predetermined period from controller 104, judge that then son is in the operation troubles state from the bus node of controller 108 correspondences.
Fig. 2 shows according to an embodiment of the invention, and fault output device shows schematic diagram.
As shown in Figure 2, for being connected to master controller or when breaking down from the execution unit of controller, the tree-shaped logic diagram that master controller generates transfers to fault output device and shows.
So execution unit has 13 trouble spots that may break down, in tree-shaped logic diagram, be shown as respectively trouble spot 1 to trouble spot 13, when break down in certain trouble spot, corresponding variation can occur in its corresponding block diagram, it can be the change of color, cue etc. is sent in the change of font.Among the figure break down in trouble spot 2, trouble spot 3, trouble spot 5, trouble spot 8, trouble spot 10, trouble spot 11, trouble spot 12, trouble spot 13, and then the framework of corresponding block diagram changes, and it is large that literal is deepened to become.
The user also can arrange error information displaying method according to concrete needs, as showing in form, shows in structural drawing etc.
According to another aspect of the invention, also propose a kind of engineering machinery, comprised the described vehicle breakdown diagnostic system of above-mentioned arbitrary technical scheme.
More than be described with reference to the accompanying drawings technical scheme of the present invention, considered in the correlation technique, the complex structure of fault diagnosis system, diagnosis speed and accuracy rate of diagnosis are all undesirable.The present invention proposes a kind of vehicle breakdown diagnostic system, can simplify the internal system circuit and lay, improve speed and the accuracy rate of fault diagnosis.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a vehicle breakdown diagnostic system is characterized in that, comprising: at least one master controller, at least one is from controller and fault output device, wherein:
Each described master controller that is connected to correspondence from controller, and described master controller is connected to described fault output device;
Describedly be connected at least one object to be measured from controller, be used for the running status of described object to be measured is detected, and testing result is sent to described master controller, and/or, described master controller is connected at least one described object to be measured, is used for the running status of described object to be measured is detected; And,
The testing result that described master controller generates or receives by described fault output device output.
2. vehicle breakdown diagnostic system according to claim 1, it is characterized in that, described object to be measured comprises: be connected to described master controller or described system line or detection part from controller, then described master controller or describedly from controller the process that the object to be measured that is attached thereto carries out condition monitoring is comprised:
Described master controller or describedly obtain detection signal from controller from the object to be measured that links to each other, and when the rate of change of the value of described detection signal or value does not meet preset rules, judge that described object to be measured is in the operation troubles state; And/or,
Described master controller or describedly obtain periodic heartbeat frame signal from controller from the object to be measured that links to each other, if described controller does not receive described heartbeat frame signal or receiving cycle does not meet predetermined period, judge that then described object to be measured is in the operation troubles state.
3. vehicle breakdown diagnostic system according to claim 1, it is characterized in that, described object to be measured comprises: be connected to described master controller or described execution unit from controller, then described master controller is according to described testing result, generate corresponding tree-shaped logic diagram, and export by described fault output device.
4. each described vehicle breakdown diagnostic system in 3 according to claim 1 is characterized in that, also comprises:
Described master controller with described from being connected by at least one bus line between the controller.
5. vehicle breakdown diagnostic system according to claim 4 is characterized in that, also comprises:
Described master controller obtains periodic heartbeat frame signal from what link to each other from controller, if described master controller does not receive described heartbeat frame signal or receiving cycle does not meet predetermined period, then judge describedly to be in the operation troubles state from bus node corresponding to controller.
6. vehicle breakdown diagnostic system according to claim 5 is characterized in that, also comprises:
When the quantity of the bus node that is in the operation troubles state during more than or equal to the predetermined number threshold value, described master controller judges that described bus line breaks down.
7. each described vehicle breakdown diagnostic system in 3 according to claim 1, it is characterized in that, comprise that also at least one is connected to described son from controller from controller, and at least one is connected to described son from the object to be measured of controller, then described son also is used for from controller: the running status to the object to be measured that is attached thereto detects, and testing result is sent to corresponding from controller, to be sent to corresponding master controller by described from controller.
8. vehicle breakdown diagnostic system according to claim 7 is characterized in that, and is described from controller and described son from being connected by at least one bus line between the controller.
9. vehicle breakdown diagnostic system according to claim 8 is characterized in that, also comprises:
Describedly obtain periodic heartbeat frame signal from the son that links to each other from controller from controller, if describedly do not receive described heartbeat frame signal or receiving cycle does not meet predetermined period from controller, judge that then described son is in the operation troubles state from bus node corresponding to controller.
10. an engineering machinery is characterized in that, comprises such as each described vehicle breakdown diagnostic system in the claim 1 to 9.
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