RU2250565C2 - Computer-based instrumentation - Google Patents

Abstract

FIELD: instrumentation engineering; serviceability check of multichannel communication systems.

SUBSTANCE: proposed equipment includes personal computer, multiplexing switch, circuit checkup unit, control unit, multichannel comparison unit, virtual standard, switching unit, output signal shaper, multiplexer, and normalizing unit that has voltage meter and circuit meter.

EFFECT: enlarged functional capabilities of device.

3 cl, 1 dwg

Description

The proposed invention relates to the field of cocktail testing equipment and can be used to test the operability of multi-channel communication systems.

It is known that the centralized control device, selected as the closest analogue, contains a multi-channel comparison unit and a virtual standard and a normalization unit connected to it, the outputs of the controlled object are connected to its inputs (Pat. RF No. 2141722, class IPC N 04 V 3/46, publ. 20.11.99, Bull. No. 32).

The disadvantage of this device is that it does not affect the monitored channels of an object simulated using a virtual standard.

The technical task of the proposed invention is to expand the functionality of the device.

The task is achieved by the fact that in an automated test equipment containing a multi-channel comparison unit, a virtual standard connected to it and a normalization unit, a multiplexer, a switch connected by its inputs to the outputs of the multiplexer, and outputs to the inputs are connected normalization unit, output driver, connected by its outputs to the inputs of controlled circuits and the input of the multiplexer, a control unit connected to pl with a local comparison unit, a virtual standard, a switch and an output driver, a channel switch connected to the control unit and a PC connected to it, while the control unit, a multi-channel comparison unit, a virtual standard, a normalization unit, a multiplexer, a switch and an output driver are combined into a unit circuit control; in addition, at least three circuit monitoring units are connected to it with a channel commutator; at the same time, the normalization block in it is made in the form of a voltage meter and circuit meters, which are connected to the outputs of the switch with their inputs and outputs to the inputs of the multi-channel comparison unit.

The proposed invention is illustrated using the scheme shown in the drawing, where the following notation:

- PC 1,

- 2 channel switch,

- block 3 control circuits

- control unit 4,

- multi-channel block 5 comparison

- virtual standard 6,

- switch 7,

- shaper 8 output signals,

- multiplexer 9,

- block 10 normalization,

- voltage meter 11 (ADC),

- meters 12 circuit (ADC).

Automated test equipment operates as follows.

Before checking the circuits of multichannel communication systems, the operator on the PC 1 selects a program that corresponds to a specific test mode. After starting the test program, the personal computer 1 through the 2 channel switch transmits to the control unit 3 circuits to the control unit 4 a set of commands for checking circuits. The control unit 4 sorts the received commands and transmits them to the virtual standard 6 and the shaper 8 of the output signals.

The virtual standard 6, on the basis of the received commands, generates and transmits to the multi-channel block 5 comparison signals, the magnitude of the voltage corresponding to the signals of the controlled circuits in digital form during their normal operation.

Shaper 8 output signals generates at its outputs and transmits to the circuit of the controlled object pulsed and analog signals, the magnitude of the voltage corresponding to the pulse and analog signals interacting with the circuits of the controlled object. The output driver 8 outputs the same signals to the multiplexer 9 and then through the switch 7 to the inputs of the normalization unit 10 in accordance with the commands of the control unit 4. Block 10 normalization converts the received pulsed and analog signals to digital and transmits them to a multi-channel block 5 comparison, where they are compared with the signals that must be generated at the outputs of the shaper 8 output signals in accordance with a given test program. The comparison results are transmitted at the command of the control unit 4 through the switch 2 channels on the PC 1. Thus, the PC 1 controls the correct operation of the shaper 8 output signals. In the case of unacceptable deviation of the signals generated by the shaper 8 output signals from the signals that must be generated, the PC 1 transmits to the control unit 4 a command to terminate the shaper 8 output signals.

Then the multiplexer 9 receives at its inputs the signals from the controlled circuits and transfers them through the switch 7 to the inputs of the normalization unit 10 in accordance with the commands of the control unit 4.

The normalization unit 10 converts the received pulse and analog signals into digital ones and transmits them to the multi-channel comparison unit 5, where they are compared with the signals coming from the virtual standard 6 in real time. Block 10 normalization includes a voltage meter 11, which determines and digitizes the magnitude of the voltages coming from the circuits of the controlled object, and the circuit meters 12, according to the incoming signals, determine whether or not an open in one or another circuit, and converts this information into digital code. The results of processing the signals from the normalization unit 10 by comparing them with the signals from the virtual standard 6 are transmitted by the multi-channel comparison unit 5 to the PC 1 using the control unit 4 via the channel switch 2. Based on the received signal processing results, the PC 1 decides suitability of controlled circuits.

Thus, due to the fact that a personal computer, a control unit, a multi-channel comparison unit, a virtual standard, a normalization unit, a multiplexer, a switch, and an output driver combined into a circuit control unit are introduced into the automated test equipment, the device's functionality is expanded.

Claims (3)

1. Automated test equipment containing a multi-channel comparison unit, a virtual standard connected to it and a normalization unit, characterized in that a multiplexer, a switch connected to its inputs to the outputs of the multiplexer, and outputs to the inputs of the normalization unit, the driver of the output signals connected to the outputs of the controlled circuits and the input of the multiplexer, a control unit connected to a multi-channel a comparison locator, a virtual standard, a switch, and an output driver, a channel switch connected to the control unit and a PC connected to it, while the control unit, a multi-channel comparison unit, a virtual standard, a normalization unit, a multiplexer, a switch, and an output driver are combined into a control unit chains. 2. Automated test equipment according to claim 1, characterized in that at least three circuit monitoring units are connected to it with a channel switcher. 3. The automated test equipment according to claim 1, characterized in that in it the normalization unit is made in the form of a voltage meter and circuit meters, which are connected to the outputs of the switch with their inputs and outputs with the inputs of the multi-channel comparison unit.