CN201035103Y - On-board Locomotive Electrical Equipment Fault Monitoring Device - Google Patents

Abstract

The utility model relates to a failure monitoring device for electrical equipment of a vehicle-mounted locomotive, which relates to the field of failure monitoring. The utility model realizes the real-time detection of the working state of the electrical equipment of the locomotive, discovers the failure points of the electrical equipment of the locomotive in time, and facilitates the daily maintenance and inspection of the electrical equipment of the locomotive. The on-board locomotive electrical equipment fault monitoring device includes a data acquisition circuit and an on-board upper computer. The data acquisition circuit includes a switch value acquisition circuit, an analog quantity acquisition circuit and a control circuit. The switch quantity acquisition circuit and the analog quantity acquisition circuit pass through the control bus and the control circuit Connection, the control circuit is connected to the vehicle host computer through the CAN bus. The utility model adopts the modularization and bus design mode, and can expand the data collection amount by increasing the number of switching value acquisition circuits and analog quantity acquisition circuits according to the actual situation on site, and can also increase the number of monitoring locomotives by increasing the number of data acquisition circuits. The utility model can be applied to routine maintenance and fault detection of existing locomotives.

Description

On-board Locomotive Electrical Equipment Fault Monitoring Device

technical field

The utility model relates to a fault detection device for electrical equipment.

Background technique

The electrical equipment of the existing locomotive includes main electrical equipment, auxiliary electrical equipment, excitation equipment and control equipment, etc., and the circuit is relatively complicated. In the existing electrical equipment commonly used for locomotives, there are about 96 various switch contacts, about 39 various voltage signals and about 14 various current signals. When any one of these signals in the electrical equipment of the locomotive fails , will affect the operation status of the locomotive's overall electrical equipment. When there is a problem with the running status of the locomotive, the maintenance personnel should check whether the work of each point is normal according to the power distribution diagram of the electrical equipment of the locomotive and personal experience. Not only the workload of the maintenance personnel is heavy, but the maintenance time is also long, especially When the locomotive fails during transportation, if the fault point cannot be found and repaired as soon as possible, the consequences will be very serious. In addition, in the daily maintenance of the locomotive, the maintenance personnel also need to check the status of each point one by one, or use the existing locomotive electrical testing instrument to test the electrical equipment of the locomotive, but this testing instrument cannot monitor the locomotive in real time. It is not conducive to the daily maintenance of locomotive electrical equipment to detect the working status of electrical equipment.

Utility model content

In order to realize the real-time detection of the working status of the electrical equipment of the locomotive, discover the failure points of the electrical equipment of the locomotive in time, and facilitate the daily maintenance and repair of the electrical equipment of the locomotive, the utility model designs a fault monitoring device for electrical equipment of the locomotive, which includes a data acquisition circuit and a vehicle-mounted host computer, the data acquisition circuit includes a plurality of switch quantity acquisition circuits, a plurality of analog quantity acquisition circuits and a control circuit, the switch quantity acquisition circuit and the analog quantity acquisition circuit are connected through a control bus and a control circuit, and the control The circuit is connected with the vehicle host computer through the CAN bus.

The vehicle-mounted locomotive electrical equipment failure monitoring device of the utility model realizes the real-time monitoring of the working status of the locomotive electrical equipment, can detect the working status of the locomotive electrical equipment in real time during the operation of the locomotive, and timely predict or find faults, so as to give maintenance personnel Provide accurate information to facilitate the troubleshooting and daily maintenance of locomotive electrical equipment by maintenance personnel.

Description of drawings

Fig. 1 is a schematic structural view of the present utility model; Fig. 2 is a schematic structural view of the switch quantity acquisition circuit 2 described in the specific embodiment one; Fig. 3 is a structural schematic diagram of the analog quantity acquisition circuit 3 described in the specific embodiment one; Fig. 4 is a schematic structural diagram of the control circuit 1 described in the first embodiment; Fig. 5 is a schematic structural diagram of the fault monitoring device for electrical equipment of the on-board locomotive described in the second embodiment.

Detailed ways

Specific Embodiment 1: Refer to FIG. 1 to FIG. 4 to illustrate this embodiment. The vehicle-mounted locomotive electrical equipment failure monitoring device of the present embodiment is composed of a data acquisition circuit 9 and a vehicle-mounted upper computer 6, and the data acquisition circuit 9 is composed of a plurality of switching value acquisition circuits 2, a plurality of analog quantity acquisition circuits 3 and a control circuit 1 Composition, the switching quantity acquisition circuit 2 and the analog quantity acquisition circuit 3 are connected to the control circuit 1 through the control bus 4, and the control circuit 1 is connected to the vehicle-mounted upper computer 6 through the CAN bus 5.

The vehicle-mounted upper computer in this embodiment can adopt an embedded computer system or a small industrial control computer system. In the vehicle-mounted locomotive electrical equipment failure monitoring device of the present embodiment, the control circuit 1 controls the switch quantity acquisition circuit 2 and the analog quantity acquisition circuit 3 to collect various switch quantities and analog quantity signals of electrical equipment on the locomotive that need to be monitored, and then the control circuit 1. Transmit the collected and processed switching and analog signals to the on-board host computer 6 through the CAN bus. The locomotive staff can learn about the various switch contacts in the locomotive electrical equipment and various voltages in the equipment at any time through the on-board host computer. In the case of the current signal, once a fault occurs, the fault point can be found in time and accurately for maintenance.

Referring to Fig. 2, the switching value acquisition circuit 2 in the present embodiment is made up of a plurality of first high-resistance isolation circuits 20, a plurality of photoelectric isolation circuits 21 and a first multi-channel analog switch circuit 22, and the first multi-channel analog switch circuit The circuit 22 has a plurality of signal input ends, the signal output ends of the plurality of first high-resistance isolation circuits 20 are respectively connected to the signal input ends of a plurality of photoelectric isolation circuits 21, and the signal output ends of the plurality of photoelectric isolation circuits 21 are respectively connected to A plurality of signal input terminals of the first multi-channel analog switch circuit 22 are connected, and a signal output terminal and a plurality of control signal input terminals of the first multi-channel analog switch circuit 22 are connected to the control bus 4 . When working, the signal output ends of a plurality of switching value sensors 7 in the locomotive are respectively connected with the signal input ends of a plurality of first high-impedance isolation circuits 20, and a plurality of switching value signals are transmitted to the In the first multi-channel analog switch circuit 22, the first high-resistance isolation circuit 20 and the photoelectric isolation circuit 21 prevent the vehicle-mounted fault monitoring device of this embodiment from being affected or damaged due to the monitored switch signal failure. The analog switch circuit 22 is controlled by the control bus 4 and selectively transmits the switching value signals of the multiple switching value sensors 7 in the locomotive to the control bus 4 in a time-division manner.

Referring to Fig. 3, the analog quantity acquisition circuit 3 in the present embodiment is made up of a plurality of second high-resistance isolation circuits 30, a plurality of electromagnetic isolation circuits 31 and a second multi-channel analog switch circuit 32, and the second multi-channel analog switch circuit The circuit 32 has a plurality of signal input ends, the signal output ends of the plurality of second high-impedance isolation circuits 30 are respectively connected to the signal input ends of a plurality of electromagnetic isolation circuits 31, and the signal output ends of the plurality of electromagnetic isolation circuits 31 are respectively connected to Multiple signal input terminals of the second multi-channel analog switch circuit 32 are connected, and one signal output terminal and multiple control signal input terminals of the second multiple-channel analog switch circuit 32 are connected to the control bus 4 . When working, the signal output ends of a plurality of analog quantity sensors 8 on the locomotive are respectively connected with the signal input ends of a plurality of second high-resistance isolation circuits 30, and a plurality of analog quantity signals are transmitted to the In the second multi-channel analog switch circuit 32, the second high-resistance isolation circuit 30 and the electromagnetic isolation circuit 31 prevent the vehicle-mounted fault monitoring device of this embodiment from being affected or damaged due to the monitored analog signal failure, and the second multi-channel The analog switch circuit 32 is controlled by the control bus 4 , and selectively transmits the analog signals of multiple analog sensors 8 on the locomotive to the control bus 4 in a time-division manner.

Both the switch quantity acquisition circuit 2 and the analog quantity acquisition circuit 3 adopt multi-channel analog switch circuits, which can achieve the purpose of collecting as many external signals as possible with less resources.

Referring to Fig. 4, the control circuit 1 in the present embodiment is made up of A/D conversion circuit 10, main control CPU circuit 11 and CAN bus driver circuit 12, and the data input terminal of described A/D conversion circuit 10 is connected with control bus 4 , the data output end of the A/D conversion circuit 10 and its control end are respectively connected with the data signal input end and the control signal output end of the main control CPU circuit 11, and several signal input/output ends of the main control CPU circuit 11 are connected with the control bus 4 connections, the two input/output terminals of the main control CPU circuit 11 are connected with the signal output/input terminals of the CAN bus driver circuit 12, and the two input/output terminals of the CAN bus driver circuit 12 are connected with the CAN bus 5.

The A/D conversion circuit 10 and the main control CPU circuit 11 in this embodiment adopt the 87C196KB16 single-chip microcomputer circuit with A/D conversion function, and the CAN bus driver circuit 12 adopts the CAN control chip SJA1000 and the CAN driver chip PCA82C250.

In actual use, the number of switching value acquisition circuits 2 and analog quantity acquisition circuits 3 to be added can be determined according to the number of various signals that need to be monitored on site.

Specific Implementation Mode 2: Refer to FIG. 5 to illustrate this implementation mode. The difference between this embodiment and the vehicle-mounted locomotive electrical equipment fault monitoring device described in Embodiment 1 is that it also includes a plurality of acquisition circuits 9 , and the plurality of acquisition circuits 9 are connected to the vehicle-mounted host computer 6 through the CAN bus 5 .

The vehicle-mounted locomotive electrical equipment failure monitoring device of this embodiment is suitable for use on trains including multiple locomotives. When the train includes multiple locomotives, use the vehicle-mounted locomotive electrical equipment failure monitoring device of the present embodiment, place a collection circuit 9 in each locomotive, and then connect with the vehicle-mounted host computer 6 through the CAN bus, and use a vehicle-mounted host computer 6, the situation of the electrical equipment in the multi-section locomotive can be monitored, which is convenient and saves resources.

Claims (5)

1. vehicle-mounted locomotive electrical equipment malfunction monitoring device, it is characterized in that it comprises data acquisition circuit (9) and vehicle-mounted host computer (6), described data acquisition circuit (9) is made up of a plurality of switch acquisition circuit (2), a plurality of analog acquisition circuit (3) and control circuit (1), described switch acquisition circuit (2) is connected with control circuit (1) by control bus (4) with analog acquisition circuit (3), and described control circuit (1) is connected with vehicle-mounted host computer (6) by CAN bus (5).

2. vehicle-mounted locomotive electrical equipment malfunction monitoring device according to claim 1, it is characterized in that described switch acquisition circuit (2) is by a plurality of first high resistant buffer circuits (20), a plurality of photoelectric isolating circuits (21) and first multi-channel analog switch circuit (22) are formed, described first multi-channel analog switch circuit (22) has a plurality of signal input parts, the signal output part of described a plurality of first high resistant buffer circuits (20) is connected with the signal input part of a plurality of photoelectric isolating circuits (21) respectively, the signal output part of a plurality of photoelectric isolating circuits (21) is connected with a plurality of signal input parts of first multi-channel analog switch circuit (22) respectively, and a signal output part of first multi-channel analog switch circuit (22) and a plurality of signal input end are connected with control bus (4).

3. vehicle-mounted locomotive electrical equipment malfunction monitoring device according to claim 1, it is characterized in that described analog acquisition circuit (3) is by a plurality of second high resistant buffer circuits (30), a plurality of electromagnetic isolation circuit (31) and second multi-channel analog switch circuit (32) are formed, described second multi-channel analog switch circuit (32) has a plurality of signal input parts, the signal output part of described a plurality of second high resistant buffer circuits (30) is connected with the signal input part of a plurality of electromagnetic isolation circuit (31) respectively, the signal output part of a plurality of electromagnetic isolation circuit (31) is connected with a plurality of signal input parts of second multi-channel analog switch circuit (32) respectively, and a signal output part of second multi-channel analog switch circuit (32) and a plurality of signal input end are connected with control bus (4)

4. vehicle-mounted locomotive electrical equipment malfunction monitoring device according to claim 1, it is characterized in that described control circuit (1) is by A/D change-over circuit (10), master cpu circuit (11) and CAN bus driving circuits (12) are formed, the data input pin of described A/D change-over circuit (10) is connected with control bus (4), the data output end of A/D change-over circuit (10) with and control end be connected with control signal output ends with the data-signal input end of master cpu circuit (11) respectively, several signal I/O ends of master cpu circuit (11) are connected with control bus (4), two I/O ends of master cpu circuit (11) are connected with the signal output/input end of CAN bus driving circuits (12), and two I/O ends of CAN bus driving circuits (12) are connected with CAN bus (5).

5. vehicle-mounted locomotive electrical equipment malfunction monitoring device according to claim 1 is characterized in that it also comprises a plurality of data acquisition circuits (9), and described a plurality of data acquisition circuits (9) are connected with vehicle-mounted host computer (6) by CAN bus (5).

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