CN104166087A - Circuit board fault detecting system based on VXI instrument - Google Patents

Abstract

The invention discloses a circuit board fault detecting system based on a VXI instrument. The circuit board fault detecting system based on the VXI instrument comprises a system controller, an IEEE488 programmable instrument, an adapting device, a universal adaptor and a VXI bus mainframe box. The system controller is an externally-mounted main control computer, and the system controller is connected with the VXI bus mainframe box through a GPIB-VXI translator. The main control computer is connected with a displayer. One end of the IEEE488 programmable instrument is connected with the adapting device. The other end of the IEEE488 programmable instrument is connected with the main control computer through a GPIB bus. The IEEE488 programmable instrument is provided with a programmable excitation source. One end of the programmable excitation source is connected with the adapting device. The other end of the programmable excitation source is connected with the main control computer through a GPIB bus. The adapting device is connected with the IEEE488 programmable instrument and the programmable excitation source. The universal adaptor is connected with the adapting device. According to the circuit board fault detecting system with the structure, the debugging time can be shortened, the maintenance quality is improved, and the maintenance cost is reduced.

Description

Circuit Board Fault Detection System Based on VXI Instrument

technical field

The invention relates to the computer field, in particular to a circuit board fault detection system based on a VXI instrument.

Background technique

At present, many electromechanical control systems use centralized distributed computers, which are powerful and easy to operate, but the configuration is huge and complex, and the hundreds of printed circuit boards included are links that are prone to failure, and the technical requirements for maintenance and testing are high. It will take a lot of time to troubleshoot the circuit board, and the maintenance quality cannot be guaranteed. While increasing the time-consuming of the entire maintenance, it also increases the overall maintenance cost.

Contents of the invention

The purpose of the present invention is to provide a circuit board fault detection system based on VXI instruments, which solves the problems of time-consuming circuit board fault detection, unguaranteed maintenance quality and high maintenance cost in the current circuit board fault detection system.

In order to achieve the above object, the present invention adopts the following technical solutions: a circuit board fault detection system based on VXI instrument, including a system controller, IEEE488 program-controlled instrument, adapter, universal adapter, and VXI bus main box;

Described system controller is the plug-in main control computer, and it is connected with VXI bus main frame by GPIB-VXI translator, and main control computer is connected with display;

One end of the IEEE488 program-controlled instrument is connected to the adapter, and the other end is connected to the main control computer through the GPIB bus. The IEEE488 program-controlled instrument is provided with a program-controlled excitation source. The bus is connected with the main control computer;

The adapter is respectively connected with the IEEE488 program-controlled instrument and the program-controlled excitation source;

The universal adapter is connected with the adapter.

Further, as a preferred solution, this solution also includes a printer, and the printer is connected to the main control computer.

Further, as a preferred solution, this solution also includes a signal generator, and the signal generator is connected to the adapter through a cable.

Further, as a preferred solution, the signal generator described in this solution is a DF1631 power function signal generator.

Compared with the prior art, the present invention has the following advantages and beneficial effects:

(1) The present invention takes the system controller, VXI bus main box and its test instrument module as the core, supplemented by some IEEE488 program-controlled instruments, not only realizes the fault detection of the circuit board, but also locates the fault to the component level, shortening the The time spent troubleshooting circuit boards improves the quality of repairs, which in turn reduces the cost of repairs to a certain extent.

(2) The present invention forms a mixed integrated test system of GPIB and VXI bus by connecting the main control computer and the VXI bus main box through the GPIB bus. The VXI card measuring instruments and GPIB program-controlled instruments used in the system conform to Standard, standardization, generalization, high degree of modularization, strong compatibility, easy to expand and update the system, and lay a solid foundation for the future development of the system.

Description of drawings

Fig. 1 is a block diagram of the system structure of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with examples, but the embodiments of the present invention are not limited thereto.

Example:

As shown in Figure 1, the VXI instrument-based circuit board fault detection system described in this embodiment includes a system controller, IEEE488 program-controlled instrument, adapter, universal adapter, and VXI bus main box;

The system controller is an external main control computer, which is connected with the VXI bus main box through a GPIB-VXI translator. The main control computer is connected with a display. The GPIB-VXI translator is connected with the VXI bus master box. The built-in computer has the advantages of fast speed, small size and convenient use, but its cost is too high and it is not easy to upgrade, so the plug-in computer is still used.

One end of the IEEE488 program-controlled instrument is connected to the adapter, and the other end is connected to the main control computer through the GPIB bus. The IEEE488 program-controlled instrument is provided with a program-controlled excitation source, and one end of the program-controlled excitation source is connected to the adapter. The main control computer is connected; in order to provide a stable voltage source for the circuit board under test and facilitate program control, the desktop instruments HPE3631A and HPE3632A are selected as the program-controlled excitation source of the system.

The HPE1406A command module is used as a zero-slot module in the VXI bus main box. It is connected with the external controller through the GPIB.VXI translator, and has translator and interface functions, providing public system resources and resource management; using HPE1418A (8 channels D/A conversion) module provides the required analog signal for the circuit board to be tested; the HPE1458A (96-channel digital V0) module is connected with the data bus, address bus and control bus of the circuit board to be tested to complete the control and control of the circuit board Read and write operations; HPE1411B (5.5-digit multimeter) is used as the signal parameter test module.

The adapter is respectively connected with the IEEE488 program-controlled instrument and the program-controlled excitation source, and the universal adapter is connected with the adapter. This part is mainly to establish a basically unified connection and communication method between the excitation source, the measuring instrument and the test object. Since there are many types of circuit boards to be tested, a single adapter cannot meet the test requirements. Therefore, an adapter is designed on the basis that each universal adapter is connected to as many circuit boards as possible. The adapter is designed to avoid repeated plugging and connecting of wires and cables when changing the universal adapter. All excitation sources and VXI measurement instrument module lead-out lines are connected to the adapter together, and then connected to the universal adapter through a 96-pin socket. Since the circuit boards to be tested are standard designs, most of them have 96-pin anode sockets, so the universal adapter can be connected to various circuit boards to be tested, and finally the fault diagnosis system and the circuit board to be tested are connected into a complete body.

This embodiment also includes a printer, which is connected to the main control computer.

This embodiment also includes a signal generator, the signal generator is connected to the adapter through a cable, and the signal generator is a DF1631 power function signal generator.

GPIB (general p11Epose interface bus) is an 8-bit parallel interface invented by HP in the 1970s. It enables rack-mounted and desktop instruments to communicate with each other and with the host computer. Because of its simplicity and flexibility, almost all instrument manufacturers use this interface [port, until today, it is still the preferred interface for automatic test systems composed of independent instruments.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Any simple modifications and equivalent changes made to the above embodiments according to the technical essence of the present invention all fall within the scope of the present invention. within the scope of protection.

Claims (4)

1. the board failure detection system based on VXI instrument, is characterized in that: comprise system controller, IEEE488 programmable instrument, breakout box, universal adapter, vxi mainframe case;

Described system controller is external hanging type main control computer, and it is connected with vxi mainframe case by GPIB-VXI translater, and main control computer is connected with display;

One end of described IEEE488 programmable instrument is connected with breakout box, the other end is connected with main control computer by gpib bus, described IEEE488 programmable instrument is provided with program control driving source, and one end of program control driving source is connected with breakout box, and the other end is connected with main control computer by gpib bus;

Described breakout box is connected with IEEE488 programmable instrument, program control driving source respectively;

Described universal adapter is connected with breakout box.

2. the board failure detection system based on VXI instrument according to claim 1, is characterized in that: also comprise printer, described printer is connected with main control computer.

3. the board failure detection system based on VXI instrument according to claim 1, is characterized in that: also comprise signal generator, described signal generator is connected with breakout box by cable.

4. the board failure detection system based on VXI instrument according to claim 3, is characterized in that: described signal generator is DF1631 power function signal generator.