CN117759767B - Multi-state information detection and fault diagnosis digital driving unit and method - Google Patents
Multi-state information detection and fault diagnosis digital driving unit and method Download PDFInfo
- Publication number
- CN117759767B CN117759767B CN202311782288.8A CN202311782288A CN117759767B CN 117759767 B CN117759767 B CN 117759767B CN 202311782288 A CN202311782288 A CN 202311782288A CN 117759767 B CN117759767 B CN 117759767B
- Authority
- CN
- China
- Prior art keywords
- fault
- displacement sensor
- sensor
- valve
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 57
- 238000003745 diagnosis Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000006073 displacement reaction Methods 0.000 claims abstract description 82
- 230000008054 signal transmission Effects 0.000 claims abstract description 14
- 230000002159 abnormal effect Effects 0.000 claims description 21
- 238000012545 processing Methods 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 17
- 230000005856 abnormality Effects 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 208000030175 lameness Diseases 0.000 claims description 5
- 239000011159 matrix material Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 206010017577 Gait disturbance Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Landscapes
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
The invention discloses a multi-state information detection and fault diagnosis digital driving unit and a method, wherein a first pilot electromagnetic valve, a first displacement sensor, a second pilot electromagnetic valve, a first temperature and pressure sensor and a second temperature and pressure sensor are all arranged in a pilot end cover body, a magnetic rod of the first displacement sensor and a magnetic rod of the second displacement sensor are respectively arranged in the first displacement sensor and the second displacement sensor, and the magnetic rod of the first displacement sensor and the magnetic rod of the second displacement sensor slide left and right along the inner cavities of the first displacement sensor and the second displacement sensor; the first displacement sensor, the second displacement sensor, the first temperature and pressure sensor and the second temperature and pressure sensor are respectively connected with the first displacement sensor plug connector, the second displacement sensor plug connector, the first temperature and pressure sensor connecting piece and the second temperature and pressure sensor connecting piece through wire harnesses, and the control panel is connected with an external power supply and a CAN signal transmission line.
Description
Technical Field
The invention relates to a digital driving unit and a digital driving method for multi-state information detection and fault diagnosis, and belongs to the technical field of engineering machinery.
Background
As the engineering machinery is automatically and intelligently developed, the development of the electrohydraulic valve is approximately carried out by the following stages:
the first stage: the electro-mechanical converter is used for replacing an electromagnet or an adjusting handle, the structure of the valve is unchanged, the valve does not generally contain parameter feedback, the working bandwidth is between 1 and 5Hz, the steady-state hysteresis is between 4 and 7 percent, and the valve is mainly controlled by open loop;
And a second stage: the high-voltage-resistant proportional electromagnet, the proportional amplifier and various internal feedbacks are combined, so that the bandwidth of the proportional element is increased to 5-15 Hz, the steady-state hysteresis is reduced to about 3%, and the control can be realized by open-loop or closed-loop control.
And a third stage: modern control methods such as flow internal feedback, feedback pressure, displacement, intelligent correction and self-adaptive control are adopted, so that the dynamic response and control precision of the electro-hydraulic proportional valve are further improved. In addition, artificial intelligent control and expert systems have been applied to electrohydraulic systems, and fault diagnosis, digital simulation techniques, detection and the like have also gradually developed and matured.
The existing proportional valve has the advantages that the sensor, the control amplifier, the measuring amplifier and the valve are combined together to form an electromechanical integrated element, so that the structure is more compact, and the performance is further improved. And the fault diagnosis of the partial electric proportional valve is integrated on the valve internal controller, so that the safety of the electric proportional valve is improved.
However, in the prior art, when the electrohydraulic valve fails, the electrohydraulic valve only prompts that the electrohydraulic valve cannot work normally, and the specific failure position and the failure degree cannot be further judged, namely, the failure diagnosis and the processing mode can only be qualitatively judged and can not be quantified; in the existing scheme, early warning can be given only when part of faults occur, and the limp treatment mode is single.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide a multi-state information detection and fault diagnosis digital driving unit and a method, which solve the problems that in the prior art, fault diagnosis and processing modes can only be qualitatively judged and cannot be quantified.
In order to achieve the above object, the present invention adopts the following technical scheme:
the multi-state information detection and fault diagnosis digital driving unit comprises a first pilot electromagnetic valve, a first displacement sensor, a second pilot electromagnetic valve, a pilot end cover body, a control board, a first temperature and pressure sensor and a second temperature and pressure sensor;
The first pilot electromagnetic valve, the first displacement sensor, the second pilot electromagnetic valve, the first temperature-pressure sensor and the second temperature-pressure sensor are all arranged in the pilot end cover body,
The magnetic rods of the first displacement sensor and the magnetic rods of the second displacement sensor slide left and right along the inner cavities of the first displacement sensor and the second displacement sensor;
The control board is provided with a first displacement sensor plug connector, a second displacement sensor plug connector, a first temperature and pressure sensor connecting piece and a second temperature and pressure sensor connecting piece, wherein the first displacement sensor, the second displacement sensor, the first temperature and pressure sensor and the second temperature and pressure sensor are respectively connected with the first displacement sensor plug connector, the second displacement sensor plug connector, the first temperature and pressure sensor connecting piece and the second temperature and pressure sensor connecting piece through wire harnesses, and the control board is connected with an external power supply and a CAN signal transmission line.
Further, the control panel comprises an acquisition and conversion module, a power-on self-checking module, a fault diagnosis module and a fault lameness processing module,
The acquisition and conversion module is used for acquiring a power supply signal, a CAN signal and a controller temperature signal, processing and converting all signals and transmitting the signals to the power-on self-checking module
The power-on self-checking module is used for CAN signal transmission detection, hardware circuit detection, stored information detection, sensor signal detection and main control program detection;
the fault diagnosis module is used for judging valve core clamping stagnation, sensing failure, abnormal temperature rise, signal disconnection, power supply undervoltage fault and detecting fault degree;
and the fault limp-home processing module is used for making corresponding safety processing countermeasures based on different fault modes and different fault severity degrees.
Further, the digital drive unit comprises a right cover plate of the digital drive unit, an upper cover plate of the digital drive unit and a double-head socket;
The upper cover plate of the digital driving unit is connected to the upper end of the pilot end cover body, the double-ended socket is arranged on the upper cover plate of the digital driving unit and also comprises a contact pin, and the control board is connected with an external power supply and a CAN signal transmission line through the contact pin;
The right cover plate of the digital driving unit is connected to the right end of the pilot end cover body.
Further, a gasket is further arranged between the double-ended socket and the upper end cover of the digital driving unit.
Further, a first cover plate sealing ring is arranged between the upper cover plate of the digital driving unit and the upper end of the pilot end cover body, and a second cover plate sealing ring is arranged between the right cover plate of the digital driving unit and the right end of the pilot end cover body.
Further, the valve further comprises a main valve, wherein the main valve comprises a reversing valve and a flow valve;
The first temperature pressure sensor and the second temperature pressure sensor respectively acquire pressure temperature signals before and after a valve port of the reversing valve, the magnetic rod of the first displacement sensor and the magnetic rod of the second displacement sensor respectively acquire displacement signals of the flow valve and the reversing valve, the first pilot electromagnetic valve is connected with a control port of the flow valve, and the second pilot electromagnetic valve is connected with a control port of the reversing valve.
Further, the right sides of the first temperature and pressure sensor and the second temperature and pressure sensor are respectively provided with a baffle ring, the right sides of the baffle rings are connected with a baffle plate, and the baffle plate is fixedly connected to the pilot end cover body.
A multi-state information detection and fault diagnosis method comprises the following steps:
Powering up the controller;
controlling a power-on self-checking module to detect CAN signal transmission, a hardware circuit, stored information, sensor signals and a main control program;
the control fault diagnosis module judges and detects the fault degree of valve core clamping stagnation, sensing failure, abnormal temperature rise, signal disconnection and power supply undervoltage faults;
And the control fault lameness processing module makes corresponding safety processing countermeasures based on different fault modes and different fault severity degrees.
Further, the steps of controlling the power-on self-checking module to detect the CAN signal transmission, the hardware circuit, the stored information, the sensor signal and the main control program include:
firstly, CAN signal transmission detection is carried out, if abnormal, a CAN signal abnormal alarm signal is directly output, and if normal, the next hardware circuit detection is carried out;
Outputting a circuit abnormality alarm signal if the hardware circuit detects abnormality, and entering Flash storage information detection if the hardware circuit is normal;
Outputting a Flash abnormality alarm signal if the Flash storage information is abnormal, and entering a sensor signal for detection if the Flash storage information is normal;
Outputting a sensor signal abnormality alarm signal if the sensor signal is abnormal, and entering a main control program for detection if the sensor signal is normal;
if the main control program is abnormal, outputting a main control program abnormality alarm signal, and if the main control program is normal, entering the next link after the power-on detection is finished.
Further, the step of determining the valve core clamping stagnation, sensing failure, abnormal temperature rise, signal disconnection and power supply undervoltage faults by the control fault diagnosis module includes:
Extracting a fault mode feature vector J of the valve from a fault library;
and (3) calculating: y= { ω m } · { J },
Wherein ω m represents a weight coefficient matrix; j= [ J 1,j2,…,jm ] represents a failure mode feature vector, J m represents a feature vector of an mth failure mode; y= [ y 1,y2,…,yi…,yp ] represents a fault vector to be judged, y i represents an ith fault characteristic value in the fault vector, and p is the total number of fault characteristic values in the fault vector y;
Based on the fact that the fault characteristics contained in each fault mode are not the same, judging which mode the fault belongs to through y.
Further, the step of detecting the fault degree by the control fault diagnosis module includes:
Calculating a theoretical eigenvector J i,Ji corresponding to each fault eigenvalue of the fault vector y to represent the theoretical eigenvector corresponding to the ith fault eigenvalue y i in the fault vector, and establishing the following piecewise function by J i:
Wherein d ij is the J-th feature threshold of the i-th fault feature value, t-1 represents the number of segments of the J i segment function, i j e [0,1], represents the fault level value, i j =1, represents no fault, i j =0, represents a complete fault;
Based on the aforementioned J i, the final failure degree J is calculated Total (S)
The invention has the beneficial effects that:
(1) The digital driving unit designed by the patent can realize multi-state detection of the main valve and the control panel by integrating the temperature and pressure sensor, the displacement sensor and the temperature sensor, and the digital driving unit is provided with the temperature and pressure integrated sensor, can realize real-time monitoring of the pressure and the temperature of the valve port and provides pressure difference and temperature compensation information for high-precision control of the flow of the controller in the valve;
(2) The digital driving unit designed by the patent is internally provided with a control board, and the hardware and software on the control board can realize diagnosis and limp-home treatment of 5 failure modes of the main valve matched with the digital driving unit;
(3) The digital driving unit is used together with the upper computer to realize early warning of the fault state of the main valve;
(4) This patent designs a digital drive unit, and it can regard as an independent control module to use with the main valve is integrated, realizes the unable state monitoring that realizes of traditional electrohydraulic multiway valve, safer, more intelligent.
Drawings
FIG. 1 is a longitudinal section view of a digital drive unit according to the present invention;
FIG. 2 is a cross-sectional view of a digital drive unit according to the present invention;
FIG. 3 is a schematic diagram of a main valve fault diagnosis of the present invention;
fig. 4 is a fault diagnosis flow chart of the present invention.
Meaning of reference numerals in the drawings: 1-a right cover plate of the digital driving unit; 2-a first pilot solenoid valve; 3-a first displacement sensor; 4-a second displacement sensor; 3.1-a first displacement sensor magnetic rod; 4.1-a second displacement sensor magnetic rod; 5-a second pilot solenoid valve; 6-a pilot end cap body; 7-a first cover plate sealing ring; 8-a digital drive unit upper cover plate; 9-a gasket; 10-a first fastening screw; 11-double-ended sockets; 11.1-pins; 12-a second fastening screw; 13-warm-pressing a sensor cover plate; 14-a baffle ring; 15-control panel; 15.1-a first displacement sensor plug; 15.2-a second displacement sensor plug; 15.3-a first warm-pressing sensor connection; 15.4-a second warm-pressing sensor connection; 16-a third fastening screw; 17-a first temperature and pressure sensor; 18-a first sealing ring; 19-a second sealing ring; 20-a second cover plate sealing ring; 21-a first pilot oil passage; 22-a second pilot oil passage; 23-a third pilot oil passage; 24-fourth pilot oil passage; 25-fifth pilot oil passage; 26-sixth pilot oil passage; 27-a second temperature and pressure sensor; 28-fourth fastening screw; 29-a fifth fastening screw; 30-sixth fastening screws; 31-seventh fastening screw; 33-a main overflow valve; 34-reversing valve; 35-a flow valve; 36-main valve.
Detailed Description
The following detailed description of the technical solutions of the present application will be given by way of the accompanying drawings and specific embodiments, and it should be understood that the specific features of the embodiments and embodiments of the present application are detailed descriptions of the technical solutions of the present application, and not limiting the technical solutions of the present application, and that the embodiments and technical features of the embodiments of the present application may be combined with each other without conflict.
The embodiment discloses a digital driving unit for multi-state information detection and fault diagnosis, as shown in fig. 1, the hardware structure mainly includes: a first temperature and pressure sensor 17, a second temperature and pressure sensor 27, a first displacement sensor 3, a second displacement sensor 4, a first pilot electromagnetic valve 2, a second pilot electromagnetic valve 5 and a control board 15.
The digital drive unit is characterized in that a first pilot electromagnetic valve 2 and a second pilot electromagnetic valve 5 are arranged in a pilot end cover body 6 of the digital drive unit, a first pilot oil passage 21, a second pilot oil passage 22, a third pilot oil passage 23, a fourth pilot oil passage 24, a fifth pilot oil passage 25 and a sixth pilot oil passage 26 which are matched with the first pilot electromagnetic valve 2 and the second pilot electromagnetic valve 5 to work are arranged in the digital drive unit, the pilot oil passages respectively lead to two ends of a main valve core, and when the first pilot electromagnetic valve 2 and the second pilot electromagnetic valve 5 are in reversing, pilot oil directly acts on one side of the main valve core to enable the main valve core to be in reversing, so that an external mechanism is controlled by the main valve;
The inside of the pilot end cover 6 is also provided with jacks of a first displacement sensor 3 and a second displacement sensor 4, a sealing ring is arranged between the first displacement sensor 3, the second displacement sensor 4 and the pilot end cover 6, high-pressure oil is prevented from entering a cavity of the digital driving unit, the inside of the first displacement sensor 3 and the inside of the second displacement sensor 4 are respectively provided with a magnetic rod 3.1 of the first displacement sensor and a magnetic rod 4.1 of the second displacement sensor, the magnetic rod 3.1 of the first displacement sensor and the magnetic rod 4.1 of the second displacement sensor slide left and right along the inner cavities of the first displacement sensor 3 and the second displacement sensor 4, the ends of the magnetic rod 3.1 of the first displacement sensor and the magnetic rod 4.1 of the second displacement sensor are connected with a main valve core through threads, when the main valve core moves left and right, wire harnesses are respectively arranged on the shells of the first displacement sensor 3 and the second displacement sensor 4, the magnetic rod is respectively connected with a first displacement sensor plug-in piece 15.1 and a second displacement sensor 15.2 of the control board, the magnetic rod 4.1 of the second displacement sensor is respectively provided with a sealing ring 18, and a sealing ring 18 is respectively arranged on the end face of the first sealing ring and the second sealing ring; the inside of the pilot end cover body 6 is provided with two warm-pressing sensor mounting holes, as shown in fig. 2, a first warm-pressing sensor 17 and a second warm-pressing sensor 27 are respectively mounted, and the two warm-pressing sensors are horizontally arranged and parallel to the control board 15; the middle parts of the right sides of the first temperature and pressure sensor 17 and the second temperature and pressure sensor 27 are provided with wiring harnesses which are respectively connected with a first temperature and pressure sensor connecting piece 15.3 and a second temperature and pressure sensor connecting piece 15.4 on the control board 15, the middle parts of the temperature and pressure sensors are provided with sealing ring grooves, the sealing rings of the temperature and pressure sensors are placed for preventing oil liquid on the left side of the temperature and pressure sensors from entering a right side cavity, the right side of the temperature and pressure sensors is provided with a baffle ring 14, the temperature and pressure sensors can reach the installation preset position by leftwards extruding the baffle ring 14 during installation, the right side of the baffle ring 14 is connected with a baffle plate 13, the baffle plate 13 is fixedly connected with a pilot end cover body 6 through bolts, and the axial movement of the temperature and pressure sensors is prevented through the baffle plate 13; the right end cover 1 of the digital driving unit is fastened on the right side of the pilot end cover body 6 through a sixth fastening screw 30 and a seventh fastening screw 31, and the pilot end cover body 6 and the right end cover 1 of the digital driving unit are sealed through a first cover plate sealing ring 7; the digital driving unit upper end cover 8 is fastened at the upper end of the pilot end cover body 6 through a third fastening screw 16, and the pilot end cover body 6 and the digital driving unit upper end cover 8 are sealed through a second cover plate sealing ring 20; the double-end socket 11 is fastened on the upper end face of the upper end cover 8 of the digital driving unit through a first fastening screw 10 and a second fastening screw 12, the double-end socket 11 connects the control board 15 with external power supply and CAN signal transmission through the contact pin 11.1, and a gasket 9 is arranged between the double-end socket 11 and the upper end cover 8 of the digital driving unit to prevent the double-end socket 11 from loosening.
The specific implementation cases are as follows:
The digital driving unit is assembled on the main valve 36 shown in fig. 3 through the fourth fastening screw 28 and the fifth fastening screw 29, the main valve 36 comprises a reversing valve 34 and a flow valve 35, a signal acquisition and conversion module, a power-on self-checking module and a fault detection module are arranged in the controller, and the information detection and fault diagnosis working principles are as follows:
After the valve group controller is electrified, the controller signal acquisition and conversion module acquires pressure and temperature signals before and after the valve port of the reversing valve 34 through the first temperature and pressure sensor 17 and the second temperature and pressure sensor 27, acquires displacement signals of the flow valve 35 and the reversing valve 34 through the magnetic rod 3.1 of the first displacement sensor and the magnetic rod 4.1 of the second displacement sensor, and simultaneously, the controller acquisition and conversion module also acquires power signals, CAN signals and controller temperature signals, and transmits all signals to the controller electrification self-checking module after processing and conversion, and CAN signal communication detection, hardware circuit detection, FLASH storage information detection and main control program communication detection are completed in the electrification self-checking module. After the power-on detection is normal, the control board can detect the operation condition of the main valve in real time in the normal control mode operation process, and the fault mode of the internal integration of the fault detection module is adopted: valve core clamping stagnation, sensing failure, abnormal temperature rise, signal short lines and power supply undervoltage, judging the current main valve 36 running condition, performing fault early warning and pilot electromagnetic valve limping treatment according to the fault degree, and displaying the fault result on an upper computer of the whole machine.
Example two
Based on the foregoing digital driving unit for multi-state information detection and fault diagnosis, the present embodiment discloses a method for multi-state information detection and fault diagnosis, as shown in fig. 4, comprising the following steps:
The first step: the controller is powered on
And a second step of: power-on self-test
The power-on self-checking process is carried out in a serial structure, firstly CAN signal transmission detection is carried out, if abnormal, CAN signal abnormal alarm signals are directly output, and if normal, the next hardware circuit detection is carried out; outputting a circuit abnormality alarm signal when the hardware circuit detects abnormality, and entering Flash storage information detection when the hardware circuit is normal; outputting a Flash abnormality alarm signal when the Flash storage information is abnormal, and entering a sensor signal for detection when the Flash storage information is normal; outputting a sensor signal abnormality alarm signal when the sensor signal is abnormal, and entering a main control program for detection when the sensor signal is normal; and outputting a main control program abnormality alarm signal when the main control program is abnormal, and entering the next link after the power-on detection is finished when the main control program is normal.
And a third step of: failure mode determination
The fault mode judgment is based on a fault library of the valve, firstly, a fault mode feature vector J of the valve is extracted from the fault library, fault information is mapped to a few features, namely an original n-dimensional feature vector K= [ K 1,k2,…,kn ], and the dimension reduction is processed into an m-dimensional feature vector J= [ J 1,j2,…,jm ], wherein m < n.
The fault decision process is expressed as: y= { ω m } { J } (1)
Equation (1) ω m —a weight coefficient matrix;
j—a fault mode feature vector, J m representing a feature vector of the mth fault mode;
y- -the fault vector to be determined.
Wherein y= [ y 1,y2,…,yi…,yp],yi ] represents the i-th fault characteristic value in the current fault mode, p is the total number of fault characteristic values in the fault vector y, and because the fault characteristics contained in each fault mode are not the same (for example, the fault characteristics of spool clamping stagnation comprise main valve displacement and solenoid valve voltage, the fault characteristics of signal disconnection are sensor detection information and sensor voltage value), the fault can be judged to which mode based on the calculated y.
Fourth step: fault level determination
Based on the failure mode determined by the formula (1), the following processing is performed:
Calculating a theoretical eigenvector J i,Ji corresponding to each fault eigenvalue in the fault mode to which the fault model belongs, wherein the theoretical eigenvector J i,Ji corresponding to the ith fault eigenvalue y i in the current fault mode is represented, and J i establishes the following piecewise function:
Wherein d ij is the J-th feature threshold of the i-th fault feature value in the current fault mode, t-1 represents the number of segments of the J i segment function, i j e [0,1], represents the fault degree value, i j =1, represents no fault, i j =0, and represents complete fault;
Based on the aforementioned J i, the final failure degree J is calculated Total (S)
Fifth step: fault early warning and lameness treatment
Different processing modes are adopted according to the severity of the fault and the safety of the system.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (9)
1. The multi-state information detection and fault diagnosis method is characterized by comprising the following steps:
Powering up the controller;
the control power-on self-checking module detects CAN signal transmission, a hardware circuit, stored information, sensor signals and a main control program:
firstly, CAN signal transmission detection is carried out, if abnormal, a CAN signal abnormal alarm signal is directly output, and if normal, the next hardware circuit detection is carried out;
Outputting a circuit abnormality alarm signal if the hardware circuit detects abnormality, and entering Flash storage information detection if the hardware circuit is normal;
Outputting a Flash abnormality alarm signal if the Flash storage information is abnormal, and entering a sensor signal for detection if the Flash storage information is normal;
Outputting a sensor signal abnormality alarm signal if the sensor signal is abnormal, and entering a main control program for detection if the sensor signal is normal;
outputting a main control program abnormality alarm signal if the main control program is abnormal, and entering the next link after the power-on detection is completed if the main control program is normal;
the control fault diagnosis module judges and detects the fault degree of valve core clamping stagnation, sensing failure, abnormal temperature rise, signal disconnection and power supply undervoltage faults:
Extracting a fault mode feature vector J of the valve from a fault library;
and (3) calculating: y= { ω m } · { J },
Wherein ω m represents a weight coefficient matrix; j= [ J 1,j2,…,jm ] represents a failure mode feature vector, J m represents a feature vector of an mth failure mode; y= [ y 1,y2,…,yi…,yp ] represents a fault vector to be judged, y i represents an ith fault characteristic value in the fault vector, and p is the total number of fault characteristic values in the fault vector y;
Judging which mode the fault belongs to through y based on the fact that fault characteristics contained in each fault mode are different;
And the control fault lameness processing module makes corresponding safety processing countermeasures based on different fault modes and different fault severity degrees.
2. The multi-state information detection and fault diagnosis method according to claim 1, wherein the step of controlling the fault diagnosis module to detect the degree of the fault comprises:
Calculating a theoretical eigenvector J i,Ji corresponding to each fault eigenvalue of the fault vector y to represent the theoretical eigenvector corresponding to the ith fault eigenvalue y i in the fault vector, and establishing the following piecewise function by J i:
Wherein d ij is the J-th feature threshold of the i-th fault feature value, t-1 represents the number of segments of the J i segment function, i j e [0,1], represents the fault level value, i j =1, represents no fault, i j =0, represents a complete fault;
Based on the aforementioned J i, the final failure degree J is calculated Total (S)
3. A multi-state information detection and fault diagnosis digital driving unit, characterized by comprising a first pilot electromagnetic valve (2), a first displacement sensor (3), a second displacement sensor (4), a second pilot electromagnetic valve (5), a pilot end cover body (6), a control board (15), a first warm-pressing sensor (17) and a second warm-pressing sensor (27), wherein the control board (15) is used for executing the multi-state information detection and fault diagnosis method according to any one of claims 1-2;
The first pilot electromagnetic valve (2), the first displacement sensor (3), the second displacement sensor (4), the second pilot electromagnetic valve (5), the first temperature and pressure sensor and the second temperature and pressure sensor are all arranged in the pilot end cover body (6),
The magnetic rods (3.1) of the first displacement sensor and the magnetic rods (4.1) of the second displacement sensor are respectively arranged in the first displacement sensor (3) and the second displacement sensor (4), and the magnetic rods (3.1) of the first displacement sensor and the magnetic rods (4.1) of the second displacement sensor slide left and right along the inner cavities of the first displacement sensor (3) and the second displacement sensor (4);
Be equipped with first displacement sensor plug connector (15.1), second displacement sensor plug connector (15.2), first warm-pressing sensor connecting piece (15.3), second warm-pressing sensor connecting piece (15.4) on control panel (15), first displacement sensor (3), second displacement sensor (4), first warm-pressing sensor (17), second warm-pressing sensor (27) are connected first displacement sensor plug connector (15.1), second displacement sensor plug connector (15.2), first warm-pressing sensor connecting piece (15.3), second warm-pressing sensor connecting piece (15.4) respectively through the pencil, external power source, CAN signal transmission line are connected to control panel (15).
4. The multi-state information detection and fault diagnosis digital drive unit according to claim 3, wherein the control board (15) comprises an acquisition and conversion module, a power-on self-test module, a fault diagnosis module and a fault lameness processing module,
The acquisition and conversion module is used for acquiring a power supply signal, a CAN signal and a controller temperature signal, processing and converting all signals and transmitting the signals to the power-on self-checking module
The power-on self-checking module is used for CAN signal transmission detection, hardware circuit detection, stored information detection, sensor signal detection and main control program detection;
The fault diagnosis module is used for judging valve core clamping stagnation, sensing failure, abnormal temperature rise, signal disconnection, power supply undervoltage fault and detecting fault degree;
The fault limp-home processing module makes corresponding safety processing countermeasures based on different fault modes and different fault severity degrees.
5. The multi-state information detection and fault diagnosis digital drive unit according to claim 3, further comprising a digital drive unit right cover plate (1), a digital drive unit upper cover plate (8), a double-ended socket (11);
The upper cover plate (8) of the digital driving unit is connected to the upper end of the pilot end cover body (6), the double-ended socket (11) is arranged on the upper cover plate (8) of the digital driving unit, the double-ended socket (11) further comprises a contact pin (11.1), and the control board (15) is connected with an external power supply and a CAN signal transmission line through the contact pin (11.1);
The right cover plate (1) of the digital driving unit is connected to the right end of the pilot end cover body (6).
6. The digital drive unit for multi-state information detection and fault diagnosis according to claim 5, wherein a gasket (9) is further provided between the double-ended socket (1) and the upper end cap (8) of the digital drive unit.
7. The multi-state information detection and fault diagnosis digital driving unit according to claim 5, wherein a first cover plate sealing ring (7) is arranged between an upper cover plate (8) of the digital driving unit and the upper end of the pilot end cover body (6), and a second cover plate sealing ring (20) is arranged between a right cover plate (1) of the digital driving unit and the right end of the pilot end cover body (6).
8. A multi-state information detection and fault diagnosis digital drive unit according to claim 3, further comprising a main valve (36), said main valve (36) comprising a reversing valve (34) and a flow valve (35);
The first temperature and pressure sensor (17) and the second temperature and pressure sensor (27) respectively acquire pressure temperature signals before and after a valve port of the reversing valve (34), the magnetic rod (3.1) of the first displacement sensor and the magnetic rod (4.1) of the second displacement sensor respectively acquire displacement signals of the flow valve (35) and the reversing valve (34), the first pilot electromagnetic valve (2) is connected with a control port of the flow valve (35), and the second pilot electromagnetic valve (5) is connected with a control port of the reversing valve (34).
9. The multi-state information detection and fault diagnosis digital driving unit according to claim 3, wherein the right sides of the first temperature and pressure sensor (17) and the second temperature and pressure sensor (27) are respectively provided with a baffle ring (34), the right side of the baffle ring (34) is connected with a baffle plate (13), and the baffle plate (13) is fixedly connected to the pilot end cover body (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311782288.8A CN117759767B (en) | 2023-12-22 | 2023-12-22 | Multi-state information detection and fault diagnosis digital driving unit and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311782288.8A CN117759767B (en) | 2023-12-22 | 2023-12-22 | Multi-state information detection and fault diagnosis digital driving unit and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117759767A CN117759767A (en) | 2024-03-26 |
| CN117759767B true CN117759767B (en) | 2024-08-23 |
Family
ID=90311962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311782288.8A Active CN117759767B (en) | 2023-12-22 | 2023-12-22 | Multi-state information detection and fault diagnosis digital driving unit and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117759767B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116123167A (en) * | 2022-12-30 | 2023-05-16 | 江苏汇智高端工程机械创新中心有限公司 | Dual-valve-core CAN bus control unit and control method |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8701703B2 (en) * | 2010-08-09 | 2014-04-22 | Sensus Usa Inc. | Method and apparatus for controlling gas flow via a gas shut-off valve assembly |
| CN103439653B (en) * | 2013-08-30 | 2016-03-30 | 中国人民解放军第二炮兵工程大学 | A kind of high-speed switch valve method for diagnosing faults based on drive end current detecting |
| CN104196517B (en) * | 2014-08-12 | 2017-04-05 | 中煤科工集团重庆研究院有限公司 | Full-automatic control method of mining hydraulic drilling machine |
| CN105024595B (en) * | 2015-07-22 | 2017-11-07 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | A kind of brshless DC motor failure monitoring method and device |
| CN111256581A (en) * | 2020-04-02 | 2020-06-09 | 天津中科华誉科技有限公司 | Software and hardware design scheme of corner position sensor and fault diagnosis method thereof |
| KR20220120456A (en) * | 2021-02-22 | 2022-08-30 | 주식회사 미래엔지니어링 | Prediction failure diagnosis system for automatic valve using artificial intelligence |
| CN115807798A (en) * | 2022-12-23 | 2023-03-17 | 江苏汇智高端工程机械创新中心有限公司 | Digital electro-hydraulic valve, engineering machinery, and multi-mode self-adaptive control method and system |
-
2023
- 2023-12-22 CN CN202311782288.8A patent/CN117759767B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116123167A (en) * | 2022-12-30 | 2023-05-16 | 江苏汇智高端工程机械创新中心有限公司 | Dual-valve-core CAN bus control unit and control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117759767A (en) | 2024-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110118128B (en) | Fault diagnosis and fault-tolerant control method for micro gas turbine sensor | |
| DE102011056362A1 (en) | Torque sensor, torque detector and electric power steering device | |
| CN111538316B (en) | Performance-based fault diagnosis method and system for actuating mechanism of closed-loop control system | |
| DE112015006444T5 (en) | Vehicle power supply device | |
| CN108757599B (en) | Hydraulic loading system and loading method for airplane ground test bed | |
| CN117759767B (en) | Multi-state information detection and fault diagnosis digital driving unit and method | |
| DE102016114540A1 (en) | Electrohydraulic machine with integrated sensor | |
| DE112018007327T5 (en) | Device mounted on the vehicle | |
| DE102020213357A1 (en) | Method for checking the behavior of at least one group of consumers in a motor vehicle | |
| CN109228861B (en) | Method and system for diagnosing and processing accelerator pedal failure | |
| JP2016537645A (en) | Method for estimating degradation of storage battery cells over time | |
| CN112881849A (en) | Method and device for diagnosing failure of working machine, electronic device, and storage medium | |
| EP3576994B1 (en) | Interface element for a vehicle | |
| CN112797157A (en) | Gearbox fault diagnosis system and construction method and storage medium thereof | |
| CN109642685A (en) | Use the method and apparatus of locator Model Diagnosis pneumatic control valve | |
| CN112761807A (en) | Fault diagnosis method, piston cooling system and vehicle | |
| US6881106B1 (en) | Power fault detection system for a communication bus | |
| CN112326255B (en) | Engine remote health monitoring system and monitoring method | |
| CN111319051A (en) | Intelligent inspection robot for intelligent engine room of ship and method thereof | |
| CN113946123B (en) | Suction barrel foundation construction pump prying block and suction barrel foundation construction pump prying block control method | |
| DE102021131083A1 (en) | DIAGNOSIS OF AN INPUT POWER CONDITION FOR AN ELECTRIC POWER STEERING | |
| CN205779375U (en) | A kind of fuel oil pump assembly and there is its fuel tank assembly and vehicle | |
| CN113028117A (en) | Quick response and intelligent control method based on proportional valve shaft controller | |
| CN114872677B (en) | Method for judging braking intention of driver of multi-shaft commercial vehicle line control braking system based on travel and pressure signals | |
| CN114123494B (en) | Power distribution terminal-oriented online state estimation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |