CN216527146U - 1553B bus cable assembly testing device - Google Patents

Abstract

The utility model discloses a 1553B bus cable assembly testing device which comprises a matrix switch module, wherein the matrix switch module is connected with a universal meter module, a 1553B communication module and an analog quantity acquisition module, and the matrix switch module comprises: the matrix switch module is used for connecting an external signal to the universal meter module to measure the resistance. The matrix switch module is used for connecting external signals into the 1553B communication module and the analog quantity acquisition module for communication testing and signal acquisition. The device performs manual and automatic test on the bus cable and generates a test result report. The test contents comprise whether the communication is normal or not, whether short circuit, open circuit and cross exist among cables or not, automatic analysis of test results, communication error rate detection and the like.

Description

1553B bus cable assembly testing device

Technical Field

The utility model relates to the technical field of bus test equipment, in particular to a 1553B bus cable assembly test device.

Background

The 1553B cable network is used as a channel for information transmission of each avionic subsystem on the aircraft, and the transmission performance must be detected to ensure that the bus network can be accessed after no error exists. The 1553B bus is a digital time-division command/response type multiplexing transmission data bus and is mainly characterized by distributed processing, centralized control and real-time response. The reliability mechanism comprises an error prevention function, an error tolerance function, error detection and positioning, error isolation, error correction, system monitoring and system recovery functions. By adopting a dual redundancy system and two transmission channels, good fault tolerance and fault isolation are ensured. The 1553B bus is widely applied to military aircrafts and a considerable number of civil airliners, and the aerospace system is also widely applied to the bus. The GJB5186 provides a test specification of a cable network of a 1553B bus, and the existing test means is either a manual test or a single-item test, so that the test method is time-consuming and labor-consuming, can cause artificial test errors and wrong data, is large in size and is inconvenient to carry outside. The traditional manual testing is low in efficiency and prone to errors, and in order to improve testing efficiency and testing reliability, automatic testing of a 1553B cable network is increasingly important.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a 1553B bus cable assembly testing device, wherein a matrix switch module is taken as a center in the device, and other modules or backplane connectors are connected with the matrix switch module through cables. The device for automatically testing the MIL-STD-1553B bus cable in a room temperature laboratory environment is used for solving the problems that the existing 1553B bus testing process is complex and the artificial debugging error is large.

The utility model provides a 1553B bus cable assembly testing arrangement, includes universal meter module, 1553B communication module, analog quantity acquisition module and signal connector, still includes the matrix switch module that has first port, second port, third port and fourth port, wherein:

when the resistance measurement module is in a resistance measurement mode, the matrix switch module is in a state that a first port and a fourth port are conducted, one end of the signal connector is connected to a signal A of a 1553B bus cable, the other end of the signal connector is connected with the fourth port, and the first port is connected with the universal meter module; the universal meter module obtains resistance measurement values of two ports of the cable based on the signal A;

when the terminal is in a resistance measurement mode, the matrix switch module is in a conducting state of a second port and a fourth port, one end of the signal connector is connected with a signal B of a 1553B bus cable, the other end of the signal connector is connected with the fourth port, the second port is connected with the 1553B communication module, and the 1553B communication module obtains a state word and a data word of the communication between the master controller end and the remote terminal based on the signal B;

when the device is in a signal acquisition mode, the matrix switch module is in a state of conducting the second port and the fourth port and in a state of conducting the third port and the fourth port, one end of the signal connector is connected with a signal C of a 1553B bus cable, the other end of the signal connector is connected with the fourth port, the second port is connected with the 1553B communication module, the third port is connected with the analog quantity acquisition module, and the analog quantity acquisition module acquires an analog quantity sampling signal based on the signal C.

The signal A is an analog quantity, the signal B is a digital quantity, the signal C is a digital quantity, and the signal C is used for judging the level amplitude of the signal so as to determine whether the over-coupling phenomenon exists in the current cable.

Further, the matrix switch module is composed of 4 unit matrixes, each unit matrix is composed of 4 × 16 relays, each unit matrix comprises 4 paths of row signals and 16 paths of column signals, and 14 × 64 matrix array switch is formed by short-circuiting row signal lines of adjacent unit matrixes.

Further, the resource allocation of the matrix switch module is as follows:

the first port includes column signals 52-53;

the second port includes column signals 54-57;

the third port includes column signals 58-61;

the fourth port includes row signals 1-4 and column signals 1-51.

Further, the fourth port is connected with signal connector through the mode of internal connection, signal connector includes 17 equipment terminals, and every 4 equipment terminals of being listed as are listed as, every equipment terminal comprises positive end, negative terminal, ground, and the positive end, negative terminal, the ground of every equipment terminal of being listed as are the short circuit respectively, 17 equipment terminals of being listed as are listed as the row signal 1-51 of positive end, the negative terminal of short circuit, the ground of short circuit access fourth port respectively through the short circuit.

Furthermore, the signal connector also comprises 2 metering ports, each metering port is connected with a positive cable and a negative cable, and the 2 metering ports are respectively connected with row signals 1-4 of the fourth port through the positive cable and the negative cable.

Further, the multimeter module includes two jacks, a positive jack and a negative jack, and the two jacks are connected into the column signals 52-53 of the first port through a banana connector.

Further, the 1553B communication module comprises 2 1553B channel interfaces, each 1553B channel interface comprises a positive 1553B terminal and a negative 1553B terminal, and the 2 1553B channel interfaces are respectively connected to column signals 54-57 of the second port through the positive 1553B terminals and the negative 1553B terminals.

Furthermore, the analog quantity acquisition module comprises 2 analog quantity channel interfaces, each analog quantity channel interface comprises a positive analog quantity terminal and a negative analog quantity terminal, and the 2 analog quantity channel interfaces are connected into the column signals 58-61 of the third port through the positive analog quantity terminal and the negative analog quantity terminal.

Further, the matrix switch module, the multimeter module, the 1553B communication module and the analog quantity acquisition module are connected with the CPU module through a cPCI bus, wherein the CPU module:

the system is used for controlling the connection and disconnection of the matrix switch module through a downlink cPCI bus;

when the universal meter is in a resistance measurement mode, the universal meter is used for obtaining a resistance measurement value uploaded by the universal meter module through the uplink cPCI bus;

when the communication test mode is in, the state word and the data word uploaded by the 1553B communication module are acquired through the uplink cPCI bus;

when the analog quantity acquisition module is in a signal acquisition mode, the analog quantity acquisition module is used for acquiring a sampling signal uploaded by the analog quantity acquisition module through the uplink cPCI bus;

the CPU module is also connected with an SATA hard disk, a waterproof keyboard and a display.

And the CPU module is used for analyzing, sorting and displaying data according to the resistance measurement value, the state word and the data word, the signal triggering condition and the peak-to-peak value of the sampling data.

Further, the test device comprises a 1553B bus cable group and a 1553B bus cable assembly test device.

Further:

the first port includes column signals 52-53 for connecting to a multimeter module;

the second port comprises column signals 54-57 for connecting 1553B communication modules;

the third port comprises column signals 58-61 for connecting an analog quantity acquisition module;

the fourth port comprises row signals 1-4 and column signals 1-51, the row signals 1-4 are used for connecting the metering ports, and the column signals 1-51 are used for connecting 4 groups of equipment terminals.

The utility model has the following beneficial effects:

1. the bus cable is manually tested, so that the cable is convenient to overhaul and maintain;

2. and automatically testing the bus cable and generating a test result report. The test contents comprise whether the communication is normal or not, whether short circuit, open circuit and cross exist among cables or not, automatic analysis of test results, communication error rate detection and the like.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural diagram of the connection between the computer and the functional modules according to the present invention;

FIG. 3 is a schematic diagram of the signal connection of the present invention;

FIG. 4 is a general schematic of the interconnect of the present invention;

FIG. 5 is a resource allocation diagram of a matrix switch module according to the present invention;

FIG. 6 is a schematic diagram of a matrix assembly according to the present invention;

FIG. 7 is a schematic diagram of the matrix switch module of the present invention connected to a signal connector;

FIG. 8 is a schematic diagram of the matrix switch module of the present invention connected to other modules;

FIG. 9 is a schematic diagram of a resistance measurement implementation of the present invention;

FIG. 10 is a schematic diagram of a port terminator presence detection implementation of the present invention;

FIG. 11 is a schematic diagram of a communication test implementation of the present invention;

FIG. 12 is a schematic diagram of a signal acquisition implementation of the present invention;

FIG. 13 is a schematic diagram of a computer backplane signal connector according to the present invention

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element that is referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "open," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

The device adopts the physical structure of a downward-turning portable computer, is convenient to carry and easy to use.

The functional module adopts the design of a cPCI bus, and comprises: 1 MIL-STD-1553B communication module EP-H5273, 1 matrix switch module EP-H5135, 1 analog quantity acquisition module EP-H5026 and 1 universal meter module NI PXI-4065.

The matrix switch module can be switched into a terminator of the multimeter module for resistance measurement.

The matrix switch module can be switched into the terminator of the MIL-STD-1553B communication module and the analog quantity acquisition module for communication test and signal acquisition.

The system software can analyze, arrange and display the data of the test results.

The 1553B bus cable corresponds to the terminator, and the positive end, the negative end and the ground end correspond to the white line, the blue line and the shielding line respectively, and the description will not be repeated.

The functional principle of resistance measurement is as follows:

a) conducting different row signals of the positive end and the negative end of a universal meter module channel and the matrix switch module;

b) the control matrix switch module is used for connecting two wire ends of the terminator into the universal meter module;

c) and acquiring a resistance acquisition value by using a universal meter module.

In fig. 9, CH0+ and CH0 "of the multimeter module are respectively conducted with row signals 0 and 1 of the matrix switch module, and cables connected to the row signals of the matrix are switched to measure the inter-terminal resistance. Such as:

a) resistance measurement of cable positive and negative terminals

1) 1 and 2 are conducted, so that the positive end of the cable is connected with a universal meter module CH0+, and the negative end of the cable is connected with CH 0-;

2) and acquiring a resistance acquisition value by using a universal meter module.

b) Resistance measurement of cable positive and ground terminals

1) Conducting 3 and 4 to connect the positive end of the cable with a universal meter module CH0 & lt- & gt and connect the ground end with CH0 +;

2) and acquiring a resistance acquisition value by using a universal meter module.

And controlling the matrix switch module according to the resistance measurement function, connecting the ground ends of the two ports into the universal meter module, acquiring the resistance values between the ground ends of the different ports, and detecting whether the ports have the terminator or not according to the resistance value condition.

In fig. 10, CH0+ and CH0 "of the multimeter module are respectively conducted with row signals 0 and 1 of the matrix switch module, two port ground terminals are connected to the matrix row signals 0 and 1, a resistance value between the port ground terminals is obtained, and whether a terminator exists in a port can be detected. Such as:

a) port 1 and port 2 presence terminator detection

1) 1 and 2 are conducted, so that the ground end of the port 1 is connected with a universal meter module CH0-, and the ground end of the port 2 is connected with CH0 +;

2) acquiring a resistance acquisition value by using a universal meter module;

3) if the resistance is 0, the terminator exists in both ports, otherwise, the terminator does not exist in at least one port.

The communication test function principle is as follows:

a) taking a channel of the MIL-STD-1553B communication module as a BC end and a channel as an RT end;

b) conducting the positive and negative ends of the two channels with different row signals of the matrix switch module;

c) the control matrix switch module is used for respectively connecting the two end connectors to the two channels of the communication module;

d) the communication module carries out primary communication by using the message type of BC- > RT and respectively checks data such as state word, data word and the like of a BC end and an RT end;

e) and d), controlling a matrix switch module, switching the terminator connected to the communication module, and repeating the step d) to perform the communication test of the next group of cables.

In fig. 11, CH0+, CH0-, CH1+, CH 1-of the communication module are respectively conducted with the row signals 1, 2, 3, 4,

and the two end connectors are connected into two channels of the communication module, so that the communication test between the cables is realized. Such as:

a) testing of communication between Cable 1 and Cable 2

1) Conducting 1, 3, 5 and 6, connecting the cable 1 with the communication module CH1, and connecting the cable 2 with the CH 0;

2) the cable 1 is used as a BC end, the cable 2 is used as an RT end, and the communication module is controlled to carry out communication testing.

The signal acquisition function is generally not performed independently, and is performed in cooperation with the communication test function.

The signal acquisition functional principle is as follows:

a) configuring a two-channel range gear of an analog quantity acquisition module as 16V, an internal trigger mode, a trigger level of 1.5V (the value can be configured through system software), and positive edge triggering;

b) conducting the analog quantity acquisition module with the row signal;

c) controlling a matrix switch module to connect a 1553B bus cable which is in communication and is used as an RT end into analog acquisition

The two channels of the module are collected to be positive ends;

d) before a 1553B bus cable is subjected to communication test, two channels are controlled to perform single trigger sampling, and the number of sampling points

1024 (this value can be configured by the system software);

e) taking the end of sampling or the completion of the communication test of the group of terminators as a signal acquisition function end mark;

f) checking a signal triggering condition and checking a peak-to-peak value of the sampled data;

in fig. 12, CH0+, CH0-, CH1+, and CH 1-of the communication module are respectively conducted with row signals 1, 2, 3, and 4, two end connectors are connected to two channels of the communication module, and CH0+, and CH1+ of the analog quantity acquisition module are respectively conducted with row signals 3 and 4, that is, connected with the communication module CH1 and the positive and negative ends of the cable 1, so as to realize signal acquisition of the cable. Such as:

a) signal acquisition of cable 1 positive and negative ends

1) 5, 6 are conducted, so that the positive end of the cable 1 is connected with the acquisition module CH0+, and the negative end of the cable 1 is connected with the CH1 +;

2) and controlling an acquisition module to acquire signals.

The hardware of the testing device comprises a portable computer and a functional module embedded in the computer. The functional modules are shown in fig. 6.

Specifically, the portable computer is a downward-turning portable computer, and the DMP1300 is selected as the main board.

17 x 4 equipment terminals and 2 metering interfaces are arranged on the back surface of the computer and are connected with other modules in a mode of wiring in the computer, wherein J1-16, J1-17, J2-16 and J2-17 are arranged in different sizes according to different connector models of objects to be tested, and the functions of the terminals are the same as those of other terminals.

The computer back panel is provided with four rows of equipment terminals J1-1-J4-17, and each row consists of 4 sockets J1-n-J4-n which are connected in parallel in the case; only one terminator can be accessed per column at the same time. Meanwhile, there are 2 external metering interfaces J5, J6 on the computer back panel, exiting using BNC connectors. The cPCI chassis is embedded in the computer, and all the functional modules are placed in the cPCI chassis.

The functional modules or the functional modules are connected with the external connector on the back of the computer in an internal connection mode. The right side of the computer has 3 USB interfaces and 2 gigabit ethernet ports. The power socket and the power switch of the computer are positioned on the left side.

Specifically, the MIL-STD-1553B bus module EP-H5273 is a cPCI/PXI bus module of an MIL-STD-1553B protocol, can be applied to testing and simulation of an MIL-STD-1553 system, and provides a single-function or multi-function 1553 module with 1 channel or multiple channels (dual redundancy).

Specifically, the simulation acquisition module EP-H5026 is a cPCI/PXI bus 4-path parallel simulation acquisition module. The analog single-ended input channel maximum support 4 analog single-ended input channels, the A/D resolution is 14 bits, the maximum input range of each channel is +/-16V, and the maximum sampling rate is 40 Msps.

Specifically, the multimeter module NI PXI-4065 is a PXI-based low-price 6-digit half digital multimeter (DMM) with high reliability and high precision. Can be used for AD/DC voltage measurement, AC/DC current measurement, 2-wire or 4-wire resistance measurement and diode test.

Specifically, the relay array switch module EP-H5135 is a 4 × 64 relay array switch module with a 3U size of a cPCI/PXI bus, and includes two boards of a main board and a daughter board.

Specifically, the signal connector is located on the back panel of the testing apparatus, and includes 4 × 17 device terminal interfaces and a metering interface of 2 BNC connectors.

The external interface is connected to the internal functional module interface by means of an internal wiring. The internal functional modules are connected with each other by using an internal connecting line, the matrix switch module is a center inside the testing device, and other modules or the backplane connector are connected with the matrix switch module by wire cables, and the specific description is as follows:

a) the matrix switch module is composed of 4 × 16 unit matrixes, each unit matrix comprises 4 paths of row signals and 16 paths of column signals, and 14 × 64 matrix is formed by short-circuiting row signal lines on the module connector.

b) The back plate is provided with 4 sets of 17 device terminals. And leading out the equipment terminal by using a cable and then connecting the equipment terminal into a matrix switch module column signal.

c) The metering interfaces of the 2 BNC connectors on the back panel are divided into a positive cable and a negative cable after being led out from the connectors, and the positive cable and the negative cable are connected to row signals of the matrix switch module.

d) The connector of universal meter module comprises two jacks of universal meter channel 0 positive terminal, universal meter channel 0 negative terminal. And the banana head connector leads out a cable from the jack and is connected to the column signal of the matrix switch module.

e) The positive and negative ends of the 2 channel interfaces of the 1553B communication module are led out by cables and then are connected to the array signals of the matrix switch module.

f) 2 channel interfaces of the analog quantity acquisition module are divided into a positive cable and a negative cable after being led out by the SMB connector and then are connected to column signals of the matrix switch module.

Specifically, the positive terminal, the negative terminal and the ground terminal of the 4 equipment terminals in each column of the back panel are led out by cables and are short-circuited together, and the cables are connected to column signals of the matrix array.

After 2 metering interfaces of the back panel are led out by the connector, the metering interfaces are divided into a positive cable and a negative cable which are connected to 4 row signals of the matrix switch module.

Specifically, the connector of the functional module located inside the tester mainly has: SMB, DB25, 41612 for 160 pins, and banana connector. The connector model numbers of the functional modules are shown in table 4.

Table 1: function module connector type number meter

The foregoing is only a preferred embodiment of the present invention, and the present invention is not limited thereto in any way, and any simple modification, equivalent replacement and improvement made to the above embodiment within the spirit and principle of the present invention still fall within the protection scope of the present invention.

Claims (9)

1. The utility model provides a 1553B bus cable assembly testing arrangement, includes universal meter module, 1553B communication module, analog quantity acquisition module and signal connector, its characterized in that still includes the matrix switch module that has first port, second port, third port and fourth port, wherein:

when the resistance measurement module is in a resistance measurement mode, the matrix switch module is in a state that a first port and a fourth port are conducted, one end of the signal connector is connected to a signal A of a 1553B bus cable, the other end of the signal connector is connected with the fourth port, and the first port is connected with the universal meter module; the universal meter module obtains resistance measurement values of two ports of the cable based on the signal A;

when the terminal is in a resistance measurement mode, the matrix switch module is in a conducting state of a second port and a fourth port, one end of the signal connector is connected with a signal B of a 1553B bus cable, the other end of the signal connector is connected with the fourth port, the second port is connected with the 1553B communication module, and the 1553B communication module obtains a state word and a data word of the communication between the master controller end and the remote terminal based on the signal B;

when the matrix switch module is in a signal acquisition mode, the matrix switch module is in a state that a second port is communicated with a fourth port and the third port is communicated with the fourth port, one end of a signal connector is connected with a signal C of a 1553B bus cable, the other end of the signal connector is connected with the fourth port, the second port is connected with a 1553B communication module, the third port is connected with an analog quantity acquisition module, and the analog quantity acquisition module acquires an analog quantity sampling signal based on the signal C.

2. The 1553B bus cable assembly test device of claim 1, wherein the matrix switch module is composed of 4 unit matrixes, each unit matrix is composed of 4 x 16 relays, each unit matrix comprises 4 rows of signals and 16 columns of signals, and 14 x 64 matrix array switch is composed by short-circuiting row signal lines of adjacent unit matrixes.

3. The 1553B bus cable assembly testing device of claim 2, wherein the resources of the matrix switch module are allocated as follows:

the first port includes column signals 52-53;

the second port includes column signals 54-57;

the third port includes column signals 58-61;

the fourth port includes row signals 1-4 and column signals 1-51.

4. The 1553B bus cable assembly testing device of claim 3, wherein the fourth port is connected with a signal connector in an internal wiring mode, the signal connector comprises 17 rows of equipment terminals, each row is provided with 4 equipment terminals, each equipment terminal consists of a positive end, a negative end and a ground end, the positive end, the negative end and the ground end of each row of equipment terminals are respectively in short circuit, and the 17 rows of equipment terminals are respectively connected into the row signals 1-51 of the fourth port through the short-circuited positive end, the short-circuited negative end and the short-circuited ground end.

5. The 1553B bus cable assembly testing device of claim 4, wherein the signal connector further comprises 2 metering ports, each metering port is connected with a positive cable and a negative cable, and the 2 metering ports are respectively connected to row signals 1-4 of a fourth port through the positive cable and the negative cable.

6. A 1553B bus cable assembly test device according to claim 3, wherein the multimeter module comprises two jacks, a positive jack and a negative jack, and the two jacks are connected to column signals 52-53 of the first port through banana connectors.

7. The 1553B bus cable assembly test device of claim 3, wherein the 1553B communication module comprises 2 1553B channel interfaces, each 1553B channel interface comprises a positive 1553B terminal and a negative 1553B terminal, and the 2 1553B channel interfaces are respectively connected to the column signals 54-57 of the second port through the positive 1553B terminals and the negative 1553B terminals.

8. The 1553B bus cable assembly testing device of claim 3, wherein the analog quantity acquisition module comprises 2 analog quantity channel interfaces, each analog quantity channel interface comprises a positive analog quantity terminal and a negative analog quantity terminal, and the 2 analog quantity channel interfaces are respectively connected to column signals 58-61 of a third port through the positive analog quantity terminal and the negative analog quantity terminal.

9. The 1553B bus cable assembly testing device of claim 1, wherein the matrix switch module, the multimeter module, the 1553B communication module and the analog quantity acquisition module are connected with the CPU module through a cPCI bus, wherein the CPU module:

the system is used for controlling the connection and disconnection of the matrix switch module through a downlink cPCI bus;

when the universal meter is in a resistance measurement mode, the universal meter is used for obtaining a resistance measurement value uploaded by the universal meter module through the uplink cPCI bus;

when the communication test mode is in, the state word and the data word uploaded by the 1553B communication module are acquired through the uplink cPCI bus;

when the analog quantity acquisition module is in a signal acquisition mode, the analog quantity acquisition module is used for acquiring a sampling signal uploaded by the analog quantity acquisition module through the uplink cPCI bus;

the CPU module is also connected with an SATA hard disk, a waterproof keyboard and a display.

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