RU2225013C2 - Automated system testing electrical quantities of electron equipment - Google Patents

Abstract

FIELD: measurement technology. SUBSTANCE: invention is related to automated systems designed to test electrical parameters of hardware in process of approval and presentation tests. In correspondence with invention tested electrical value of hardware is specified, sequence of controlling signals and initial data are formed for its testing, these data are amplified and converted from digital to analog form, frequency, amplitude and duration of defined actions are formed and fed to object of test. At same time specified supply voltage is formed and fed to object of test, value of tested electrical quantity is taken in the form of output signal of hardware which is converted from analog to digital form. Digital signal is processed to establish actual value of tested electrical quantity and this value is compared with required value. Automated system testing electrical parameters of electron equipment incorporates controlling personal computer 1, object 4 of test, buffering unit 7, optron decoupler 8, recording control unit 9, address decoder 10, programmable timer 11, digital-to-analog converter15, unit 16 of control registers, analog-to-digital converter 17, command former 12, unit 13 of commutator of input signals, unit 14 of commutator of output signals, adjustable power supply unit 5 and printer 6. EFFECT: shortened testing time, enhanced authenticity of results of tests of instrumentation. 4 dwg

Description

 The invention relates to measuring equipment, and more particularly to automated control systems (ASK) of electrical parameters intended for conducting checks of electrical parameters of electronic (AE) equipment during acceptance and bearer tests.

 Known automated measuring instrument, which uses the method of exemplary signals and exemplary instruments (1).

 The block diagram of automated verification using the model signal method consists of a series-connected computer, a CPC (public channel), a signal source, a device to be calibrated, a model device, and the second signal source output, and outputs of a device to be verified, a model device, ADC (analog a digital program-controlled converter) and a computer are connected to the CPC, and the computer output is connected to a verification operator.

 The objective of the proposed technical solution is to reduce the time for verification procedures and increase the reliability of the results of verification of measuring equipment.

 This task is achieved by the fact that, to control the electrical quantities of the AE, the controlled electrical value of the equipment is first set up, a sequence of control signals and source data is generated for verification, which are then amplified and converted from digital to analog form, and then the frequency, amplitude and duration of the setting actions are generated and they are fed to the AE, while at the same time a predetermined supply voltage is generated and fed to the AE, the value of the controlled electric quantity is taken in the form of an output with drove apparatus, it is converted from analog to digital form, then the digital signal is processed to determine the actual value of the controlled electrical quantity and compare this value with the desired value.

 The control of electrical values of AE is achieved using ASK. A well-known automated system for controlling the electrical parameters of electronic equipment is proposed, containing a series-connected PVEM and a control object, to provide a buffering unit 7 and an optocoupler isolation unit 8, a recording control unit 9 connected to its output with a buffering unit 7, and an address decoder unit 10 connected by its output to the buffering unit, the inputs of the recording control unit 9 and the address decoder unit 10 and the second input of the buffering unit and 7 are connected by two-way communication with a personal computer, and the optocoupler isolation unit is connected to the second input of the programmable timer block 11, the inputs of the digital analog converter (DAC) block 15 and the control register block 16 and the output of the analog digital converter 17, and the programmable timer block 11 connected to the unit of the command shaper 12 and the block of the input signal switch 13, the block of the digital analog converter (DAC) 15, connected by its output to the block of the input signal switch 13, the register block The control unit 16 is connected by one of its outputs to the programmable timer unit 11 and the command shaper unit 12, the second output to the input signal switch unit 13 and the output signal switching unit 14, and the third output to the regulated power supply 5 and the analog to digital converter unit (ADC) ) 17, which is connected by the second input to the block of the output signal switch 14, and the output is connected to the optocoupler isolation unit 8, the second input of the output signal switch block 14 and the output of the input signal switch block 13 are connected to AE 4, at m power steering unit 5 is connected with its output AE 4 and PC second two way communication with the printer 6.

 The invention is illustrated by drawings, where figure 1 shows a generalized functional block diagram of the ASC electrical parameters AE; figure 2 is a functional block diagram of a pairing device; figure 3 is a functional block diagram of the hardware; figure 4 is a functional ASK diagram.

 The proposed ASK electrical parameters AE (figure 1) contains sequentially connected by two-way communications personal computer (PC) 1 type IBM PC AT, a pairing device 2, hardware 3 and AE 4, as well as an adjustable power supply 5 connected by two-way communication with the hardware 3 and output - with AE 4, printer 6, connected by two-way communication with PC 1.

 The interface device 2 provides the interface of the ASK hardware with the IBM PC AT PC system bus.

 The interface device 2 (Fig. 2) form a buffering unit 7 connected in series with two-way communications and an optocoupler isolation unit 8, a recording control unit 9 connected by its output to the buffering unit, and an address decoder unit 10 connected by its output to the buffering unit 7, and the inputs the recording control unit 9 and the address decoder unit 10 and the second input of the buffering unit 7 are connected to the PC 1, the optocoupler isolation unit is connected by two-way communication with the hardware 3 (the second input of the programmable timer unit 11 and the inputs of the unit digital analog converter 15 and the block of control registers 16, the output of the analog-to-digital converter 17).

 The write control unit 9 generates a write signal from the system write signal using a permission signal from the address decoder unit 10.

 The buffering unit 7 and the optocoupler isolation unit 8 provide interfacing with the buffered IBM PC AT PC system bus, galvanic isolation of the tested AE from the system bus.

 The hardware part 3 (Fig. 3) of the claimed ASC of the AE electrical parameters is formed by a series-connected block of a programmable timer 11, a block of a command shaper 12, a block of a switch for input signals 13, a block of a DAC 15 connected by its output to a block of a switch for input signals 13, a block of control registers 16 associated with one of its outputs with a programmable timer block 11 and a command shaper block 12, a second output with an input signal switch block 13 and an output signal switch block 14, and a third output with an adjustable block the power supply 5 and the ADC block 17, which is connected to the output signal switch block 14 by the second input, the second input of the programmable timer block 11 and the inputs of the DAC block 15 and the control register block 16 and the ADC output 17 connected by two-way communication with the interface device 2, the second input block switch output signals 14 and the output of the block switch input signals 13 are connected with AE 4.

 Adjustable power supply 5 (figure 4) of the claimed ASK electrical parameters AE is connected by its output to AE 4, and the input to hardware 3 (blocks of control registers 16 and ADC 17).

 ASK is designed to automatically check the electrical parameters of EA. During the checks, the values of currents, voltages, amplitudes, values of transmission coefficients at various information frequencies, and values of phase shifts at a given frequency are controlled.

 PC 1 controls the operation of the ASK and implements the entire algorithm when conducting checks AE 4.

 The work of ASK is as follows.

 The control PC forms, depending on the verification, a sequence of driving signals in which the addresses and order of switching on the devices are determined, codes of control commands to turn on and off the necessary driving actions, time and number of measurement cycles of the electrical parameters of the control object.

 The indicated sequence of signals from the PC system bus enters the interface device 2 to the buffering units 7, write control 9 and address decoder 10. The address decoder unit 10 determines the addresses of the devices and issues an enable signal to the write control unit 9, which forms a data sequence in the buffering unit 7 .

 The data sequence generated and amplified by the buffering unit 7 enters the optocoupler isolation unit 8, which provides galvanic isolation of the equipment under test from the PC system bus.

 Next, the write signal enters the hardware 3 to the DAC block 15, the block of control registers 16 and the block of programmable timer 11.

 A code is stored in the DAC data register that determines the amplitude and type (frequency and shape) of the control signals (actions) received at AE 4.

 The logic of interaction of various ASK elements during checks, formed by the control PC 1, is implemented by setting and resetting the corresponding bits in the block of control registers 16, which controls the operation of the switches of the input 13 and output 14 signals, the block of the regulated power supply 5, the block of programmable timer 11, the command shaper 12 and ADC 17.

 The set of signals of the block of control registers 16 forms a control bus.

 The output voltage of the DAC 15 determines the amplitude or magnitude and shape of the output voltage of the signal of the command received at the input of AE 4 through the input signal switch 13.

 The channels of the programmable timer unit 11 are programmed to generate the necessary information frequency, carrier frequency and pulse width of the information frequency.

 The command generator 12 according to the signals from the control bus of the control register block 16 generates the carrier frequency and duration of the input action pulses on the AE 4, which are fed to the input signal switch block 13.

 The input signal switch 13 delivers the necessary actions on the inputs of the AE 4 depending on the code recorded in the control register 16.

 The results of the verification, in the form of electrical signals of controlled parameters, from the outputs of the AE 4 in analog form through the output signal switch 14 are fed to the input of the ADC 17, where they are digitized and then through the optocoupler isolation unit 8 and the buffering unit 7 are fed to the PC system bus.

 PC 1, receiving the results of each of the checks in digital form, if necessary, calculates the values of the controlled parameters of AE 4 and compares them with the values specified in the technical conditions, and also displays the results on the display screen, on printer 6 or saves them as a file .

 Adjustable power supply 5 under the action of control signals from control registers 16 generates a predetermined voltage to power AE 4.

Sources of information
1. The book is edited by Professor V. A. Kuznetsov "Metrological support and operation of measuring equipment." M., Radio and Communications, 1990, p. 145, fig. 5.1.

Claims (1)

An automated control system for the electrical parameters of electronic equipment (AE), containing a control PC and a control object, characterized in that it is equipped with a buffering unit 7 and an optocoupler isolation unit 8, a recording control unit 9 connected to its output with a buffering unit 7, in series with two-way communications and an address decoder unit 10 connected by its output to the buffering unit, the inputs of the write control unit 9 and the address decoder unit 10 and the second input of the buffering unit 7 being connected interfacing with the PC, and the optocoupler isolation unit by the second two-way communication is connected to the second input of the programmable timer unit 11, the inputs of the digital analog converter unit 15 and the control register block 16 and the output of the analog digital converter 17, and the programmable timer unit 11 is connected in series with the command generator unit 12 and the input signal switch block 13, the control register block 16 controls the operation of the input signal switch block 13, the output signal switch block 14, p walkable power supply 5, programmable timer block 11, command shaper block 12, analog to digital converter 17, the command signal from the digital analog converter 15 is fed to the electronic equipment input through the input signal switch block 13, the output signal from AE 4 is supplied through the output signal switch block 14 to the block of the analog digital converter 17, while the adjustable power supply 5 is connected by its output to the electronic equipment 4, and the PC is connected by a second two-way communication with the printer 6.

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