A crane line fault diagnosis system and method

Abstract

The application discloses a crane line fault diagnosis system and method, which comprises a display, a detection module and a detection line arranged on a crane control box; the detection line is a line drawn from a non-control signal connection point of the crane control box, the detection line is electrically connected with the detection module, and is used for sending the detected non-control signal to the detection module; the detection module is used for diagnosing the received non-control signal, and transmitting the fault diagnosis result and the received non-control signal to the display; and the display is used for analyzing and displaying the received fault diagnosis result. The application can diagnose the non-control signal, thereby covering the internal full-line diagnosis of the control box, and improving the crane fault diagnosis capacity.

Description

Technical Field

[0001] This invention belongs to the field of engineering machinery technology, and in particular relates to a crane circuit fault diagnosis system and method. Background Technology

[0002] Crane fault detection and diagnosis are currently mostly achieved through controller port diagnostics (analog input, digital input, control signal output, etc.). Fault codes are issued by the controller and transmitted to the display via CAN bus signals, realizing fault diagnosis functions for relevant control signal lines. However, it lacks fault detection and diagnosis functions for anomalies in non-control signals and related lines (lines not connected to the controller, such as power supply signals for various electrical appliances, operator cab I / O signals, etc.), limiting the detection range. Figure 1 As shown.

[0003] The number of input / output ports on the controller can be expanded. The number of controller ports can be configured according to the crane's electrical requirements to extend the diagnostic capabilities for some non-control signals. However, diagnosing non-control signals by expanding controller ports is costly and the number of expansion ports is limited, preventing its widespread adoption in crane products. Most non-control signals still need to be directly connected to the equipment via wiring harnesses. Abnormal signal states cannot be detected or diagnosed, making it impossible to detect and alert users to issues such as misoperation, power supply line abnormalities, or wiring harness connection problems. Summary of the Invention

[0004] The purpose of this invention is to provide a crane circuit fault diagnosis system and method. By adding non-control signal circuit detection points inside the control box, the detection point signals enter the detection module, and the central processing unit of the detection module generates fault codes according to the pre-set diagnostic logic and transmits them to the display, thereby covering the diagnosis of the entire circuit inside the control box and improving the crane fault diagnosis capability.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] The present invention provides a crane circuit fault diagnosis system, including a display, and a detection module and detection circuit deployed in the crane control box;

[0007] The detection line is a line led out from the connection point of the non-control signal of the crane control box. The detection line is electrically connected to the detection module and is used to send the detected non-control signal to the detection module.

[0008] The detection module is used to diagnose faults in the received non-control signals and to transmit the fault diagnosis results and the received non-control signals to the display.

[0009] The monitor is used to parse and display the received fault diagnosis results.

[0010] Furthermore, the detection module is connected to the display via a CAN bus;

[0011] The CAN bus is used to transmit the fault diagnosis results of the detection module and the received non-control signals to the display.

[0012] Furthermore, a detection line is drawn from the aforementioned non-control signal.

[0013] Furthermore, the detection module is specifically used for,

[0014] The received non-control signals are identified according to a preset program as signals that require logical judgment and signals that do not require logical judgment.

[0015] Signals requiring logical judgment are processed logically, and the fault diagnosis results are sent to the display via the CAN bus; signals that do not require logical judgment are sent directly to the display via the CAN bus.

[0016] Furthermore, the detection module is specifically used for,

[0017] Identify the non-control signal type, which includes analog signals and digital signals;

[0018] For digital signals, logical judgments are performed as follows:

[0019] Obtain a combined signal consisting of at least two signals from the same circuit;

[0020] By judging different combinations of the presence and absence of the combined signal, and combining the diagnostic strategy built into the detection module, the fault diagnosis result is output.

[0021] For analog signals, logical judgments are performed as follows:

[0022] Obtain the voltage sample value of a single detection line;

[0023] Convert the voltage sample value into the actual voltage value;

[0024] The actual voltage value is compared with the preset voltage threshold, and the fault diagnosis result is output.

[0025] Furthermore, the combined signal is a combination of signals acquired by at least two detection lines in the same loop.

[0026] or,

[0027] The signal collected by at least one detection line is combined with a vehicle body CAN signal.

[0028] Furthermore, the fault diagnosis result is a fault code, and the content of the fault code includes: a description of the fault phenomenon and a fault solution.

[0029] Furthermore, the display is specifically used for,

[0030] Receive fault diagnosis results transmitted via the CAN bus;

[0031] The fault diagnosis results are analyzed based on the corresponding communication protocol;

[0032] The analysis results will be displayed, including: fault code, description of fault phenomenon, and fault solution.

[0033] Furthermore, the display is also used for,

[0034] Preset fault modes; the fault modes include fault codes, fault descriptions, detection point status, and solutions;

[0035] Receive signal data collected by each detection line transmitted via the CAN bus;

[0036] Based on the received signal data, a query is performed from the preset fault modes to match the fault cause and solution.

[0037] The present invention also provides a method for diagnosing crane circuit faults, based on the aforementioned crane circuit fault diagnosis system, the method comprising:

[0038] The detection module acquires signal data collected by the detection line of the same loop;

[0039] If it is an analog signal, the acquired signal data will be compared with a preset threshold, and the fault diagnosis result will be output to the display.

[0040] If it is a digital signal, the fault diagnosis is performed based on the combination state of the digital signal and the built-in diagnostic strategy of the detection module, and the fault diagnosis result is output to the display.

[0041] The received fault diagnosis results are displayed on the monitor.

[0042] This invention also provides an auxiliary diagnostic method for crane circuit faults, implemented based on the aforementioned crane circuit fault diagnosis system, the method comprising:

[0043] The detection module acquires the detection point signals of the same loop and sends them to the display.

[0044] Based on the received signal, perform a query in the preset fault modes on the display;

[0045] Follow the prompts and observe the relevant signal status;

[0046] Determine the cause of the fault and the solution based on the signal status during operation.

[0047] The beneficial effects of the technical solution of this invention are as follows:

[0048] This invention improves the crane's fault diagnosis capabilities by adding a detection module and detection circuit for non-control signals inside the control box and using automatic and auxiliary diagnostic methods to achieve diagnosis of non-control signals inside the control box. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the control box signal connections;

[0050] Figure 2 This is a schematic diagram of the crane circuit fault diagnosis system provided by the present invention;

[0051] Figure 3 This is a schematic diagram of signal classification in this invention;

[0052] Figure 4 The judgment logic of the detection module provided by this invention;

[0053] Figure 5 The automatic fault diagnosis process for crane circuits provided by this invention;

[0054] Figure 6 This is a schematic diagram of the display diagnostic strategy provided by the present invention;

[0055] Figure 7 The present invention provides an auxiliary diagnostic process for crane circuit faults. Detailed Implementation

[0056] The present invention will now be further described. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0057] This invention provides a crane circuit fault diagnosis system, see [link to relevant documentation]. Figure 2 This includes a display, as well as detection modules and detection lines deployed in the control box.

[0058] Specifically, the detection module inside the control box is connected to the display via a CAN bus, which is used to transmit the fault diagnosis results of the detection module to the display for display.

[0059] The detection line is a line drawn from the connection point of the non-control signal in the control box. The detection line is electrically connected to the detection module and is used to send non-control signals to the detection module.

[0060] It should be noted that a non-control signal leads to a detection line, which is drawn from the detection point.

[0061] The detection module is used to detect non-control signals, including fault diagnosis of analog and digital signals, and to transmit the fault diagnosis results and the signal data collected from the detection points to the display.

[0062] The display is used to parse the CAN signals transmitted on the CAN bus, display the detection point signals, and provide corresponding fault code prompts based on the fault diagnosis results.

[0063] In this invention, the detection module is specifically used for,

[0064] The received non-control signals are identified according to a preset program as signals that require logical judgment and signals that do not require logical judgment.

[0065] Signals requiring logical judgment are processed logically, and the fault diagnosis results are sent to the display via the CAN bus; signals that do not require logical judgment are sent directly to the display via the CAN bus.

[0066] As a preferred implementation, the detection module performs logical processing on the signals that require logical judgment, and the specific implementation method is as follows:

[0067] The non-control signals received by the detection module include analog signals and digital signals, and the signal composition is as follows: Figure 3 As shown.

[0068] For digital signals, logical judgments are performed as follows:

[0069] Obtain a combined signal consisting of signals from at least two detection points in the same loop;

[0070] The detection module uses different combinations of the presence and absence of signals to make judgments, combined with the diagnostic strategies built into the signal detection module.

[0071] Diagnostic results are output through diagnostic strategies.

[0072] For details of the logical judgment process, please refer to... Figure 4 The signal combination states are shown in Table 1.

[0073] Table 1 Combined Signals

[0074]

[0075] It should be noted that the combined signal can be at least two detection point signals from the same circuit, or it can be a combination of at least one detection point signal and a vehicle body CAN signal.

[0076] For analog signals, logical judgments are performed as follows:

[0077] The system acquires the voltage sample value of a single detection point, converts the voltage sample value into an actual voltage value, compares it with a preset voltage threshold, and outputs the diagnostic result.

[0078] The diagnostic logic is shown in Table 2.

[0079] Table 2 Analog Signal Diagnostic Logic

[0080]

[0081] It should be noted that the fault diagnosis result is a fault code, and the content of the fault code includes: a description of the fault phenomenon and a fault solution.

[0082] In a preferred embodiment, the detection module is also used for,

[0083] The received signal data from each detection point is directly sent to the display for fault diagnosis.

[0084] In this invention, the display is specifically used for,

[0085] Receive fault diagnosis results transmitted via the CAN bus;

[0086] The fault diagnosis results, i.e., the fault codes, are parsed based on the corresponding communication protocol;

[0087] The analysis results will be displayed, including: fault code, description of fault phenomenon, and fault solution.

[0088] In one preferred embodiment, the display is also used for,

[0089] Preset fault modes;

[0090] Receive signal data collected from each detection point via CAN bus transmission;

[0091] Based on the received signal data, a query is performed from the preset fault modes to match the fault cause and solution.

[0092] It should be noted that the fault mode includes the fault code, fault description, detection point status, and solution, as detailed in Table 3 below.

[0093] Table 3. Power Supply Fault Diagnosis Codes for a Certain Product

[0094]

[0095] For monitor diagnostic procedures, please refer to [link / reference]. Figure 6 .

[0096] The diagnostic system provided by this invention adds a detection module and detection circuit, which can reduce the system's requirement for the number of high-performance controller ports.

[0097] Based on the above diagnostic system, the present invention also provides an automatic diagnosis method for crane circuit faults, see [link to relevant documentation]. Figure 5 The method includes:

[0098] The detection module acquires the detection point signals of the same loop;

[0099] If it is an analog signal, the acquired signal is compared with a preset threshold, and the diagnostic result is output to the display.

[0100] If it is a digital combination signal, the fault diagnosis is performed based on the state of the digital combination signal and the diagnostic strategy built into the detection module, and the diagnostic results are output to the display.

[0101] The received diagnostic results are displayed on the monitor.

[0102] Based on the above diagnostic system, the present invention also provides an auxiliary diagnostic method for crane circuit faults, see [link to relevant documentation]. Figure 7 The method includes:

[0103] The detection module acquires the detection point signals of the same loop and sends them to the display.

[0104] Based on the received signal, perform a query in the preset fault modes on the display;

[0105] Follow the prompts and observe the relevant signal status;

[0106] Determine the cause of the fault and the solution based on the signal status during operation.

[0107] Table 4 Semi-automatic Fault Diagnosis of Control Components

[0108]

[0109] Terminology Explanation

[0110] Control box: This is the control box for the upper structure of a wheeled crane, serving as the integrated interconnection and transfer unit for the upper structure's electrical system. The internal electrical components of the control box include: the main fuse for the upper structure, fuses for each branch circuit, relays, controllers, and wiring components required for circuit interconnection and transfer.

[0111] Non-control signals: These refer to lines in the control box that are not connected to the controller by electrical signals, including power supply lines for various electrical components and electrical transfer lines within the control box.

[0112] Control signals: These refer to the electrical signal connections between the control box and the controller, including sensor-acquired signals and control output signals.

[0113] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A crane line fault diagnostic system characterized by, This includes a display, as well as detection modules and detection lines deployed in the crane control box; The detection line is a line led out from the connection point of the non-control signal of the crane control box. The detection line is electrically connected to the detection module and is used to send the detected non-control signal to the detection module. The detection module is used to diagnose faults in the received non-control signals and to transmit the fault diagnosis results and the received non-control signals to the display. The display is used to parse and show the received fault diagnosis results; The detection module is specifically used for, The received non-control signals are identified according to a preset program as signals that require logical judgment and signals that do not require logical judgment. After performing logical processing on the signals that require logical judgment, the fault diagnosis results are sent to the display via the CAN bus. Signals that do not require logical judgment are sent directly to the display via the CAN bus; Identify the non-control signal type, which includes analog signals and digital signals; For digital signals, logical judgments are performed as follows: Obtain a combined signal consisting of at least two signals from the same circuit; By judging different combinations of the presence and absence of the combined signal, and combining the diagnostic strategy built into the detection module, the fault diagnosis result is output. For analog signals, logical judgments are performed as follows: Obtain the voltage sample value of a single detection line; Convert the voltage sample value into the actual voltage value; The actual voltage value is compared with the preset voltage threshold, and the fault diagnosis result is output.

2. A crane line fault diagnostic system according to claim 1, characterised in that, The detection module is connected to the display via a CAN bus; The CAN bus is used to transmit the fault diagnosis results of the detection module and the received non-control signals to the display.

3. A crane line fault diagnostic system according to claim 1, characterised in that, A non-control signal leads to a detection circuit.

4. A crane line fault diagnostic system according to claim 2, characterised in that, The combined signal is a combination of signals collected by at least two detection lines in the same circuit. or, The signal collected by at least one detection line is combined with a vehicle body CAN signal.

5. A crane line fault diagnostic system according to claim 2, characterised in that, The fault diagnosis result is a fault code, and the content of the fault code includes: a description of the fault phenomenon and a fault solution.

6. A crane line fault diagnostic system according to claim 2, characterised in that, The display is specifically used for, Receive fault diagnosis results transmitted via the CAN bus; The fault diagnosis results are analyzed based on the corresponding communication protocol; Display the parsing results ， The displayed content includes: fault code, description of fault symptoms, and fault solution.

7. A crane line fault diagnostic system according to claim 6, characterised in that, The display is also used for, Preset fault modes; the fault modes include fault codes, fault descriptions, detection point status, and solutions; Receive signal data collected by each detection line transmitted via the CAN bus; Based on the received signal data, a query is performed from the preset fault modes to match the fault cause and solution.

8. A method of diagnosing a fault in a crane line, characterized by, Based on the crane circuit fault diagnosis system according to any one of claims 1 to 7, the method includes: The detection module acquires signal data collected by the detection line of the same loop; If it is an analog signal, the acquired signal data will be compared with a preset threshold, and the fault diagnosis result will be output to the display. If it is a digital signal, the fault diagnosis is performed based on the combination state of the digital signal and the built-in diagnostic strategy of the detection module, and the fault diagnosis result is output to the display. The received fault diagnosis results are displayed on the monitor.

9. A method for auxiliary diagnosis of crane circuit faults, characterized in that, The crane circuit fault diagnosis system based on any one of claims 1 to 7 realizes the method comprising: The detection point signal of the same circuit is acquired by the detection module and sent to the display; According to the received signal, the fault mode preset in the display is inquired; Operation is performed according to the prompt and the relevant signal state is observed; The fault reason and solution are determined according to the signal state in the operation process.

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