Bench for diagnostics of microprocessor system of locomotive control

FIELD: electricity.

SUBSTANCE: bench is proposed for diagnostics of a microprocessor control system (MCS) of a locomotive, which comprises a computer, a source of power supply. The bench is equipped with a control unit, a unit of digital-to-analogue converter (DAC) switchboards, a unit of frequency signals inspection, a unit of input discrete channels inspection, a unit of output discrete channels inspection, a unit of MCS width-pulse modulators inspection and a unit of loads, besides, the computer is connected with the diagnosed MCS, the control unit is connected with the unit of DAC switchboards, the unit of frequency signals inspection, the unit of input discrete channels inspection, the unit of output discrete channels inspection, a unit of width-pulse modulators inspection, at the same time outputs of the DCA switchboards unit are connected to the MCS inputs, outputs of the frequency channels inspection unit are connected with the MCS inputs, outputs of the input discrete channels inspection unit are connected with MCS inputs, the inputs of the output discrete channels inspection unit are connected with MCS outputs, WPM-inputs of the width-pulse modulators inspection unit are connected with outputs of the MCS WPM and with the input of the loads unit, the control unit is connected along the second serial channel of communication with MCS, the source of power supply is connected with the diagnosed MCS and with all units of the bench, apart from the loads unit.

EFFECT: simplified bench design and increased reliability of its operation.

1 dwg

 

The invention relates to the field of physics, to a device for monitoring systems of control and regulation, in particular for testing control systems on the new series of locomotives and operated.

Known special stands the test machine using universal measuring complexes, used for control blocks control rectifier-inverter converters (BOUIP). Registration checks carried out with the use of measuring instruments, digital printing, photography, etc. with the simultaneous localization of faults until the item (Gorban V.N., Don A.L., N. Shabalin Electronic equipment electric locomotives VL80R. Repair and maintenance. - M.: Transport, 1984. - 184 S.).

The disadvantage of such devices for testing microprocessor-based systems is that they significantly complicate the diagnosis process, which takes a long time.

Known software and hardware diagnostics stand digital and microprocessor blocks in which the block discrete I / o contains connected to the system bus ISA computer circuit interfacing with the ISA bus on the highway network data and control, it is connected to the circuit to decode the address block discrete I / o, designed for port selection scheme in enego parallel through which the exchange of information between your computer and troubleshoot the unit. When it comes to the scheme decode a connected scheme external parallel interface circuit and switching signals (U.S. Pat. RU # 2324967, IPC G05B 23/02, G06F 7/00, publ. 20.05.08).

The disadvantage of this technical solution is that the stand allows you to check only discrete signals, which significantly limits its capabilities. The use of digital block I / o and external coupling does not exclude the possibility of failures in the stand.

Known to stand for the diagnosis and study of microprocessor control locomotive adopted for the prototype, containing industrial computer, display, software, containing hardware connected to the system bus PCI adapters from the standard set, and the first multi-adapter digital I / o connected to a standard external relay boards that are controlled by the algorithm from the computer, the contacts of which are connected on one side with an external power source, and on the other hand - with connectors input discrete signals MSUE and the feedback circuit are connected with inputs of the second multi-channel adapter digital I / o through the first optical dividers interchange; the remaining inputs of the second adapter are connected with connectors o is the breaking of discrete signals MSUE through the second optical divider with the junction; adapter with analog output channels connected to the input jacks of the analog signals in MSUE through amplifiers-initiator; adapter timer counter is connected to the input jacks of the pulse signals in MSUE through transistor switches; part of the adapter inputs high-speed input connected to the connectors of the output pulse signals from MSUE through multi-channel comparator, the remaining portion of the adapter inputs high-speed input connected to the output connectors of the synchronization signals, SUE; USB computer connected via an interface Converter with connectors RS485 MSUE; connectors RS432 computers and MSUE connected by train without intermediate elements units (U.S. Pat. EN No. 2400794 C1 IPC G05B 23/02, publ. 27.09.10).

A disadvantage of the known technical solutions is that they require a specialized industrial computer in conjunction with standard adapters that simultaneously with the redundancy applied hardware significantly complicates the stand with a simultaneous increase of its value and does not allow to use the stand directly on the locomotive in the conditions of the locomotive depot.

The technical result, which is aimed invention is to remove the need to use a specialized industrial computer in conjunction with a standard adapter is Rami, simplify the design, reduce cost, and improve consumer properties, including mobility.

The technical result is achieved by the fact that stand for diagnostic microprocessor control system (LSG) locomotive that contains the computer software, power supply, equipped with a control unit containing a bidirectional information bus, the unit switches to analog converters (DAC), the validation block frequency signals, the validation block discrete input channels, the validation block discrete output channels, the validation block pulse-width modulators (PWM) LSG and unit loads, and the computer is connected to the first serial communication channel diagnosed with LSG, the control unit is connected via a bidirectional data bus, respectively, with the unit switches DAC unit inspection frequency signals, the validation block discrete input channels, the validation block discrete output channels, the validation block PWM, with analog outputs block switches the DAC is connected to analog inputs LSG, the frequency outputs of the validation block frequency signals is connected to the frequency input of the ISU discrete outputs of the validation block discrete input channels are connected with discrete inputs LSG, discrete in the odes of validation block discrete output channels are connected with discrete outputs LSG, The PWM unit test pulse-width modulator connected to the PWM outputs LSG and with the input of the load block, the control unit is connected to the second serial communication channel with LSG, the power source is connected diagnosed with LSG and with all the blocks of the stand, in addition to the load block.

The drawing shows stand for diagnostic microprocessor control system locomotive contains a microprocessor control system (IAS) 1, computer 2 software, the power source 3, block 4 control unit 5 switches to analog converters (DAC)unit 6 test frequency signals, the unit 7 test input discrete channels, the unit 8 test output discrete channels, the unit 9 test pulse-width modulators (PWM) IAS 1, the unit 10 loads the first serial communication channel And the second serial communication channel B, bidirectional information bus, the computer 2 connected to the first serial communication channel And diagnosed with IAS 1, the control unit 4 is connected via a bidirectional data bus In accordance with the unit 5 switches the DAC, unit 6 test frequency signals, the unit 7 test input discrete channels, the unit 8 test output discrete channels, the unit 9 test pulse-width modulator PWM, this analogy is inhibiting output unit 5 switches the DAC is connected to analog inputs LSG 1, the frequency outputs of the unit 6 test frequency signals is connected to the frequency input IAS 1, the discrete outputs of the unit 7 test discrete input channels are connected with discrete inputs IAS 1, digital inputs block 8 verification of discrete output channels are connected with discrete outputs IAS 1, the PWM unit 9 test pulse-width modulator the PWM is connected to the PWM outputs LSG 1 and to the input unit 10 loads, the control unit 4 is connected to the second serial communication channel B with IAS 1, the power source 3 is connected diagnosed with IAS 1, computer 2 and blocks 4, 5, 6, 7, 8, 9.

The stand works as follows.

In accordance with the algorithm checks the computer 2 using the software first control connection on the first serial communication channel And, then, when the positive result of the verification of the first serial communication channel And formed a team for the translation on the first serial communication channel And IAS 1 in the test mode, the control unit 4 generates the test signals of the second serial communication channel B, setpoint analog signals, such as currents, voltages of traction electric machines, setpoint frequency signals, for example, sensors shaft speed diesel, turbocharger rotor, fans, refrigerator, discrete signals from e is ectrically schemes locomotive, for example, the state of the apparatus and controls of the locomotive (not shown)that is transmitted via the bidirectional information bus In unit 5 switches the DAC in the unit 6 test frequency signals, the unit 7 test input discrete channels in the unit 8 test output discrete channels in the unit 9 test PWM LSG 1. Diagnosed local governing system 1 according to the validation algorithm generates output discrete signals input to the input unit 8 test output discrete channels and the signal PWM-regulation at the input unit 9 checks PWM IAS 1 and the input unit 10 loads. Information received by the unit 8 test output discrete channels, and in unit 9 checks PWM IAS 1, is transmitted through the bidirectional information bus to the control unit 4. These signals are processed in the control unit 4, the processing results via a second serial communication channel B is transmitted first in IAS 1, then the first serial communication channel And into the computer 2. Diagnosed IAS 1 on the first serial communication channel And transmits to the PC 2 the results of the processing of the signals received at its digital inputs with unit 7 checks the input discrete channels in its analog inputs with unit 5 switches the DAC and its frequency inputs from the output of the unit 6 test frequency signals. The block on Rusak 10 is designed to test the operation of the PWM LSG 1 under real electrical load.

Microprocessor control system (LSG) 1 if the diagnosis is working in real time, the computer 2 together with blocks 4, 5, 6, 7, 8, 9, 10 stand by the software performs the described algorithm diagnosis, captures the necessary parameters LSG 1, compares them with valid, then the results of the diagnosis are stored and can be printed.

The adopted technical solutions allow to avoid redundancy applied hardware to simplify the design, eliminating the need for expensive industrial PC with a significant reduction of the stand, and the use of a conventional portable computer (laptop) ensures the portability of the stand and improves consumer properties.

The proposed stand for diagnostic microprocessor control system (LSG) locomotive tested in the conditions of the locomotive depot of the bottom of the Oktyabrskaya railway in diagnosing microprocessor control system MOUTH, installed on mainline freight locomotive 2TE116 and 2(3)M62 and showed good results.

Stand for diagnostic microprocessor control system (LSG) locomotive that contains the computer software, power supply, characterized in that the stand is equipped with a control unit, containing what they bidirectional information bus, the unit switches to analog converters (DAC), the validation block frequency signals, the validation block discrete input channels, the validation block discrete output channels, the validation block pulse-width modulators (PWM) LSG and unit loads, and the computer is connected to the first serial communication channel diagnosed with LSG, the control unit is connected via a bidirectional data bus, respectively, with unit switches the DAC, the validation block frequency signals, the validation block discrete input channels, the validation block discrete output channels, the validation block PWM, with analog outputs block DAC switches are connected to the analogue inputs LSG frequency outputs of the validation block frequency signals connected to the frequency input of the ISU discrete outputs of the validation block discrete input channels are connected with discrete inputs LSG, digital inputs the validation block discrete output channels are connected with discrete outputs LSG, PWM unit test pulse-width modulator connected to the PWM outputs LSG and with the input of the load block, the control unit is connected to the second serial communication channel with LSG, the power source is connected diagnosed with LSG and with all the blocks of the stand, except for unit loads



 

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