A dry node-based double-sided time-sharing drive system and system fault detection method thereof

Abstract

The present invention discloses a dry node-based double-sided time-sharing driving and sampling system, including k dry nodes, 1 processor, p acquisition circuits and m drive circuits, the k dry nodes are independent of each other, k, p, and m are all positive integers, m≤p, and p=2k; the k dry nodes are independent of each other, the p acquisition circuits are divided into two groups and are respectively arranged on both sides of the k dry nodes, and the m drive circuits are respectively arranged on both sides of the k dry nodes. The present invention also proposes a system fault detection method based on the dry node double-sided time-sharing driving and sampling system. Advantages: The present invention can monitor the input acquisition circuit and cable status in real time during system debugging or operation, reduce manual maintenance, enable the system to operate reliably, and promptly report faults caused by abnormalities in the acquisition circuit and cables.

Description

Technical Field

[0001] The invention relates to a dry node-based double-sided time-sharing driving and mining system and a system fault detection method thereof. Background Art

[0002] In industrial sites or rail transit areas, a large number of relay dry node status signals need to be collected by the system in real time and accurately. In the reliability design of existing systems, it is often assumed that the input signals to be collected are correct, so the conventional design has only one collection circuit. In some situations with high reliability requirements, a redundant collection circuit may be added. The disadvantage of this type of design is that it cannot monitor and report circuit faults, cable mixing and other problems in real time during system operation, and ignores possible cable wiring errors or aging short-circuit faults in actual working conditions; cable damage caused by vibration, rodent gnawing, rain corrosion and other reasons during long-term operation; due to the large number of types and cables at the collection points, once the above-mentioned abnormalities occur, they cannot be detected in time during system operation, which may have more serious consequences.

[0003] After searching, it was found that Chinese invention patent application CN 203551711 U discloses an input and output channel mixed line detection circuit. This circuit requires the design of an additional system, has a large number of interfaces, high cost, and requires shutdown detection. It is impossible to detect abnormalities in the acquisition circuit itself or the cable when the original system is operating normally. Summary of the invention

[0004] The present invention proposes a dual-side time-sharing drive and acquisition system based on a dry node, comprising k dry nodes, 1 processor, p acquisition circuits and m drive circuits, the k dry nodes are independent of each other, k, p, and m are all positive integers, m≤p, and p=2k; the k dry nodes are independent of each other, the p acquisition circuits are divided into two groups and are respectively arranged on both sides of the k dry nodes, and the m drive circuits are respectively arranged on both sides of the k dry nodes;

[0005] The two sides of each dry node are respectively connected to the output of a driving circuit, and the driving signals on the two sides of each dry node are respectively derived from the two driving circuits, and the driving circuits on the two sides of each dry node do not drive the output at the same time; the two sides of each dry node are respectively connected to a collection circuit, and the two collection circuits connected to each dry node are independent and are respectively used to collect the output signals of the driving circuits corresponding to the two sides of the dry node;

[0006] The processor controls the outputs of m driving circuits in a time-sharing manner, and reads the signals collected by P acquisition circuits at the same time. If the output signals of the driving circuits on either side of a single dry node can be collected by two independent acquisition circuits, the system determines that the dry node is in a closed state; if the output signals of the driving circuits on either side of a single dry node can only be collected by one acquisition circuit on the same side, the system determines that the dry node is in a disconnected state; the rest are in a fault state.

[0007] In a further preferred embodiment of the technical solution of the present invention, m driving circuits are arranged on both sides of k dry nodes, and the two sides of the k dry nodes are defined as side A and side B respectively. a driving circuits are arranged on side A, and b driving circuits are arranged on side B, where a and b are both positive integers; each driving circuit can be configured to drive one or more signal outputs, and the acquisition circuit of each dry node can detect the output signal of a certain driving circuit when a certain driving circuit outputs; on side A, if a certain driving circuit drives x signals to be output simultaneously, the driving circuits on the B sides of these x dry nodes must be driven separately.

[0008] In a further preferred embodiment of the technical solution of the present invention, m is configured as a*b≥p in order to reduce system complexity and cost.

[0009] In a further optimization of the technical solution of the present invention, m is configured as a+b=m, which is the optimal solution.

[0010] The present invention proposes a system debugging fault detection method based on a dry node double-sided time-sharing drive system, comprising the following steps:

[0011] S11, system power on;

[0012] S12, k dry nodes are disconnected;

[0013] S13, the processor controls the outputs of the m driving circuits in a time-sharing manner, and the processor simultaneously reads the signals collected by the P collection circuits;

[0014] S14, the system determines whether there is a fault, if yes, jump to S11, if no, jump to S15;

[0015] S15, k dry nodes are closed;

[0016] S16, the processor controls the outputs of the m driving circuits in a time-sharing manner, and the processor simultaneously reads the signals collected by the P collection circuits;

[0017] S17, the system determines whether there is a fault, if yes, jump to S11, if no, jump to S18;

[0018] S18, system power off, debugging completed.

[0019] The system debugging fault detection method of the present invention is as follows: during debugging, all dry nodes are closed, and the processor drives m driving circuits in sequence, reads p acquisition circuit signals in real time, identifies the state of the dry nodes, and then disconnects all dry nodes, undergoes the same driving and acquisition action again, and the processor detects and reports circuit anomalies and cable mixed connection fault details based on driving and acquisition data analysis.

[0020] The present invention proposes a system operation fault detection method based on a dry node double-sided time-sharing drive system, comprising the following steps:

[0021] S21, system power on;

[0022] S22, the processor controls the outputs of the m driving circuits in a time-sharing manner, and the processor simultaneously reads the signals collected by the P collection circuits;

[0023] S23, the system determines whether there is a fault. If there is no fault, jump to S22; if there is a fault, report it to the system.

[0024] The system operation fault detection method of the present invention is that when the system is running, each trunk node will be closed or disconnected according to external requirements, and the processor will drive m driving circuits in turn and continuously read p acquisition circuit values. According to the analysis of the driving and acquisition data, the details of circuit abnormalities or cable short circuit faults are monitored and reported in real time.

[0025] The dry nodes mentioned in the present invention are known technologies and are known to those skilled in the art.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention can monitor the input acquisition circuit and cable status in real time during system debugging or operation, reduce manual maintenance, enable the system to operate reliably, and promptly report faults caused by abnormalities in the acquisition circuit and cables. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is the architecture diagram of the driving and production system of the present invention.

[0029] Figure 2 It is a diagram of the driving circuit architecture of a single dry node in this embodiment.

[0030] Figure 3 It is the driving circuit diagram of a single dry node in this embodiment.

[0031] Figure 4 It is a flowchart of the system debugging fault detection method in this embodiment.

[0032] Figure 5 It is a flowchart of the system operation fault detection method in this embodiment. DETAILED DESCRIPTION

[0033] The technical solution of the present invention is described in detail below, but the protection scope of the present invention is not limited to the embodiments.

[0034] To make the content of the present invention more clearly understood, the following Figure 1 -Attached Figure 5 The specific implementation manner is further described.

[0035] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] The present embodiment proposes a dry node double-sided time-sharing drive and acquisition system, including k dry nodes, 1 processor, p acquisition circuits and m drive circuits, the k dry nodes are independent of each other, k, p, m are all positive integers, m≤p, p=2k; the k dry nodes are independent of each other, the p acquisition circuits are divided into two groups and are respectively arranged on both sides of the k dry nodes, and the m drive circuits are respectively arranged on both sides of the k dry nodes.

[0037] like Figure 2 As shown, the output of a driving circuit is connected to both sides of each dry node, the driving signals on both sides of each dry node come from the two driving circuits respectively, and the driving circuits on both sides of each dry node do not drive the output at the same time; each dry node is connected to an acquisition circuit on both sides, and the two acquisition circuits connected to each dry node are independent and are used to acquire the output signals of the driving circuits corresponding to the two sides of the dry node.

[0038] The processor controls the outputs of m driving circuits in a time-sharing manner, and reads the signals collected by P acquisition circuits at the same time. If the output signals of the driving circuits on either side of a single dry node can be collected by two independent acquisition circuits, the system determines that the dry node is in a closed state; if the output signals of the driving circuits on either side of a single dry node can only be collected by one acquisition circuit on the same side, the system determines that the dry node is in a disconnected state; the rest are in a fault state.

[0039] like Figure 1 As shown, in the dry node double-sided time-sharing drive and acquisition system of this embodiment, m driving circuits are arranged on both sides of k dry nodes, and the two sides of the k dry nodes are defined as side A and side B respectively. Side A is arranged with a driving circuit, and side B is arranged with b driving circuits, and a and b are both positive integers; each driving circuit can be configured to drive one or more signal outputs, and the acquisition circuit of each dry node can detect the output signal when a certain driving circuit outputs; on the A side, if a certain driving circuit drives x signals to be output simultaneously, the driving circuits on the B sides of these x dry nodes must be driven separately, that is, any two or more of the x driving circuits corresponding to the B side cannot output simultaneously.

[0040] In the dry node double-sided time-sharing driving system of this embodiment, m is configured as a*b≥p. The optimal solution is that m is configured as a+b=m.

[0041] like Figure 3As shown, the driving circuit of this embodiment includes an optocoupler Q1, a current limiting resistor R3 and a power amplifier circuit. The optocoupler Q1 is connected to the current limiting resistor R3 and then to 3.3V. The optocoupler Q1 is connected to the power amplifier circuit and then to a diode D2 in series, and then to a collection circuit.

[0042] like Figure 3 As shown, for the convenience of description, the two sides of a single dry node are defined as the upper part and the lower part, that is, Figure 3 The upper driving circuit is the driving circuit on one side of a single dry node, the lower driving circuit is the driving circuit on the other side of the single dry node, the upper acquisition circuit is the acquisition circuit on one side of the single dry node, and the lower acquisition circuit is the acquisition circuit on the other side of the single dry node.

[0043] like Figure 3 As shown, the mixed line detection single node circuit diagram of the system of this embodiment, the upper drive signal is used to output the control Q1 conduction, R3 is used to limit the loop current value to prevent the current from being too large to damage the MCU, R1, R2, Q1 form a power amplifier circuit to drive the Q2 optocoupler of the upper / lower acquisition circuit, and in order to prevent D1 from being reversely broken down by the 24V of the upper drive circuit, a diode D2 is added. This circuit system is symmetrically designed, and the functions of the components in the lower drive circuit and the lower acquisition circuit are consistent with those of the upper drive circuit and the upper acquisition circuit.

[0044] like Figure 3 As shown, the mixed line detection single-node circuit diagram of the system of this embodiment mainly includes: Q1~Q4 are 4 optocouplers, Q2 and Q3 function as signal collection, and Q1 and Q4 function as drive signals. When the system is operating normally, Q1 and Q4 drive signals are driven in time-sharing order. When Q1 is driven to 1, Q2 is used as the feedback detection of the Q1 drive signal, and the feedback signal collected is 1; if the state of the dry node of the relay to be collected is disconnected at this moment, the signal collected by Q3 is 0, and if the state of the dry node of the relay to be collected is closed at this moment, the signal collected by Q3 is 1; in this way, the truth table of the Q2 and Q3 acquisition signals is: 11: dry node closed; 10: dry node disconnected. When Q4 is driven to 1, the truth table of the Q2 and Q3 acquisition signals is: 11: dry node closed; 01 dry node disconnected.

[0045] The workflow of the mixed line detection single node of this embodiment is as follows: when the system is working, the upper drive and lower drive signals are driven in time-sharing, and the upper sampling and lower sampling circuits are continuously sampling in real time; when the upper drive signal is valid and the lower drive signal is invalid, the system determines whether the dry node is closed by collecting the upper sampling and lower sampling signal states. If both the upper sampling / lower sampling signals are valid, the MCU determines that the dry node is closed. If the upper sampling signal is valid and the lower sampling signal is invalid, the MCU determines that the dry node is not closed; if other sampling states occur, it is determined that the system has a fault. When the upper drive signal is invalid and the lower drive signal is valid, if both the upper sampling / lower sampling signals are valid, the MCU determines that the dry node is closed. If the upper sampling signal is invalid and the lower sampling signal is valid, the MCU determines that the dry node is not closed; if other sampling states occur, it is determined that the system has a fault.

[0046] In industrial sites or rail transit fields, a large number of relay dry node status signals need to be collected by the system in real time and accurately. The dry node double-sided time-sharing drive and mining system of this embodiment does not require new equipment. A drive and mining circuit is added to the original circuit to monitor faults in real time. The normal operation of the system is not affected during detection and there is no need to shut down.

[0047] like Figure 4 As shown, this embodiment proposes a system debugging fault detection method based on a dry node double-sided time-sharing drive system, including the following steps:

[0048] S11, system power on;

[0049] S12, k dry nodes are disconnected;

[0050] S13, the processor controls the outputs of the m driving circuits in a time-sharing manner, and the processor simultaneously reads the signals collected by the P collection circuits;

[0051] S14, the system determines whether there is a fault, if yes, jump to S11, if no, jump to S15;

[0052] S15, k dry nodes are closed;

[0053] S16, the processor controls the outputs of the m driving circuits in a time-sharing manner, and the processor simultaneously reads the signals collected by the P collection circuits;

[0054] S17, the system determines whether there is a fault, if yes, jump to S11, if no, jump to S18;

[0055] S18, system power off, debugging completed.

[0056] like Figure 5 As shown, this embodiment proposes a system operation fault detection method based on a dry node double-sided time-sharing driving system, including the following steps:

[0057] S21, system power on;

[0058] S22, the processor controls the outputs of the m driving circuits in a time-sharing manner, and the processor simultaneously reads the signals collected by the P collection circuits;

[0059] S23, the system determines whether there is a fault. If there is no fault, jump to S22; if there is a fault, report it to the system.

[0060] The system fault detection method of this embodiment has a short detection cycle and high reliability; the fault location time is controlled at the second level. During debugging, it is only necessary for the external device to close all nodes for a few seconds and then disconnect them, without the need for manual fault identification; during operation, there is no need to interfere with the normal operation of the original system, and the system patrols in real time to detect whether there are abnormalities in the collection of all nodes; after the algorithm reports the specific node of the fault to the system, the site only needs to check the cable of the faulty node reported by the system. This automated high-speed and comprehensive detection improves the reliability of detection compared to manual troubleshooting, and can detect all abnormalities at one time. Greatly optimize production efficiency and system reliability. In the prior art, the current on-site wiring debugging generally uses the method of host computer identification and manual troubleshooting. The external device closes / opens each relay node in turn, and the host computer identifies whether the collection signal of the corresponding node is consistent with the node state, and then determines whether the system is abnormal; once it is identified that there is an abnormality in the wiring of a certain node, it is necessary to manually check the specific fault point. A large number of nodes and wiring increase the workload of troubleshooting. If the relay node is far away from the equipment, the workload brought by the detection is even more amazing, and even one person cannot complete it alone.

[0061] The system fault detection method of this embodiment performs system fault detection online and reports fault information in real time, achieving the closed-loop operation of the acquisition system and avoiding the impact of the fault on other subsystems or secondary damage to the system. It solves the problem that the detection solutions of the prior art all require shutdown detection and cannot meet the needs of online detection, which is a major defect of the current industry.

[0062] Example 1

[0063] When there are k nodes in the system, k=32 is taken here for the convenience of description. The driving circuits are all implemented with optocouplers. Then it can be calculated that (a+b) is at least 12, and a=4, b=8 are taken (a=6, b=6, etc. can also be taken).

[0064] When debugging the system, the specific implementation steps are as follows:

[0065] Step 1: Power on the system, and keep all relay dry nodes disconnected;

[0066] Step 2: 12 driving optocouplers are driven in sequence, and 64 collecting optocouplers are continuously collecting;

[0067] Step 3: Determine whether there is a mixed line anomaly based on the algorithm;

[0068] Step 4: All relay dry nodes remain closed;

[0069] Step 5: 12 driving optocouplers are driven in sequence, and 64 collecting optocouplers are continuously collecting;

[0070] Step 6: Determine whether there is a mixed line anomaly based on the algorithm;

[0071] The fault detection algorithm describes the logic as follows: If both sides of a dry node are not driven, and the acquisition signal of one side or both sides is valid as 1, then there must be an abnormality in the wiring of this node. The processor reads the dry node corresponding to the drive signal at the corresponding moment, and it can be confirmed that there is an abnormality in the wiring or drive circuit of these two dry nodes; similarly, if the acquisition signal of multiple dry nodes that have not received the drive is valid as 1, that is, there is an abnormality in the wiring or circuit of these dry nodes. If a drive is applied to one side of a dry node, that is, the drive signal is 1 and the acquisition signal on this side is 0, then it can be confirmed that there is an abnormality in the drive circuit of this node.

[0072] When the system is running, the specific implementation steps are as follows:

[0073] Step 1: Power on the system;

[0074] Step 2: 12 driving optocouplers are driven in turn in a cycle, and 64 collecting optocouplers are continuously collecting;

[0075] Step 3: Determine whether there is a mixed line anomaly based on the algorithm;

[0076] The fault detection algorithm logic is the same as the algorithm during system debugging.

[0077] The parts not involved in the present invention are the same as the prior art or can be implemented by using the prior art.

[0078] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes in form and details may be made without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A dry node-based double-sided time-sharing driving and mining system, comprising k dry nodes, characterized in that: The invention also includes a processor, p acquisition circuits and m drive circuits, k dry nodes are independent of each other, k, p, and m are all positive integers, m≤p, p=2k; the k dry nodes are independent of each other, the p acquisition circuits are divided into two groups and arranged on both sides of the k dry nodes, and the m drive circuits are arranged on both sides of the k dry nodes; the output of a drive circuit is connected to both sides of each dry node, the drive signals on both sides of each dry node are respectively derived from the two drive circuits, and the drive circuits on both sides of each dry node do not drive the output at the same time; the two sides of each dry node are connected to a collection circuit, and the two collection circuits connected to each dry node are independent and are respectively used to collect the output signals of the drive circuits corresponding to the two sides of the dry node; the processor controls the output of the m drive circuits in time-sharing, and the processor reads the signals collected by the P acquisition circuits at the same time. If the output signal of the drive circuit on either side of a single dry node can be collected by two independent acquisition circuits, the system determines that the dry node is in a closed state; if the output signal of the drive circuit on either side of a single dry node can only be collected by one acquisition circuit on the same side, the system determines that the dry node is in a disconnected state; the rest are all fault states.

2. The dry node double-sided time-sharing driving and mining system according to claim 1 is characterized in that: m driving circuits are arranged on both sides of k dry nodes, and the two sides of the k dry nodes are defined as side A and side B respectively, a driving circuit is arranged on side A, and b driving circuit is arranged on side B, where a and b are both positive integers; each driving circuit can be configured to drive one or more signal outputs, and the acquisition circuit of each dry node can detect the output signal of a certain driving circuit when it outputs; On the A side, if a certain driving circuit drives x signals to be output simultaneously, the driving circuits on the B side of these x dry nodes must be driven separately.

3. The dry node-based double-sided time-sharing driving and mining system according to claim 2 is characterized in that: m is configured as a*b≥p.

4. The dry node double-sided time-sharing driving and mining system according to claim 2 is characterized in that: m is configured as a+b=m.

5. A system debugging fault detection method based on a dry node double-sided time-sharing driving system according to any one of claims 1 to 4, characterized in that: The steps include: S11, system power on; S12, k dry nodes are disconnected; S13, the processor controls the outputs of the m driving circuits in a time-sharing manner, and the processor simultaneously reads the signals collected by the P collection circuits; S14, the system determines whether there is a fault, if yes, jump to S11, if no, jump to S15; S15, k dry nodes are closed; S16, the processor controls the outputs of the m driving circuits in a time-sharing manner, and the processor simultaneously reads the signals collected by the P collection circuits; S17, the system determines whether there is a fault, if yes, jump to S11, if no, jump to S18; S18, system power off, debugging completed.

6. A system operation fault detection method based on a dry node double-sided time-sharing driving system according to any one of claims 1 to 4, characterized in that: The steps include: S21, system power on; S22, the processor controls the outputs of the m driving circuits in a time-sharing manner, and the processor simultaneously reads the signals collected by the P collection circuits; S23, the system determines whether there is a fault. If there is no fault, jump to S22; if there is a fault, report it to the system.

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