RU2551807C2 - Data output control device - Google Patents

Abstract

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to automation and computer engineering. The device comprises a data memory register, a digital-to-analogue converter, input and output buses, a register, a switch unit, a resistor unit and an additional input bus.

EFFECT: improved accuracy of the data output control device.

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Description

The present invention relates to automation and computer technology and can be used in the design of research process control systems, in particular in the development of an automated system designed to determine the physicomechanical properties of materials by kinetic indentation.

A device for controlling data output [1]. This device has low accuracy in the field of small signals.

Also known is a data output control system, which is the closest technical solution to the claimed invention [2]. This system also has low accuracy in the field of small signals.

The aim of the proposed invention is to increase the accuracy of the data output control device when determining the physicomechanical properties of materials by kinetic indentation.

The technical result is achieved by the fact that in a data output control device (device) containing a data memory register 2 (register 2), a digital-to-analog converter 5 (DAC 5), an input bus 7 and an output bus 8, a register 1, a block of 3 keys, a block are input 4 resistors, as well as an additional input bus 6, and the input of register 1 is connected to an additional input bus 6, and the output is to the input of the key block 3, which is connected by its output to the first input of the block of resistors 4. Register 2 with its input is connected to the input bus 7, and the output is combined with the input of the DAC 5, the output of which is connected to the second input of the block 4 of resistors. The output of the block 4 of the resistors is connected to the output bus 8.

Consider the operation of the device on its specific application in an automated system designed to determine the physicomechanical properties of materials by kinetic indentation. During the indentation cycle from the input bus 7 to the input of the register 2, codes of the magnitude of the indenter impact on the material under study are received. By synchronizing signals coming from the same bus, these codes are recorded in register 2 and set at its output and, accordingly, at the input of the DAC 5, which, in turn, forms an analog at its output and, accordingly, at the second input of the block of resistors 4 a signal whose value is proportional to the value of these codes. This analog signal, passing through a block of 4 resistors to the output bus 8, is fed to the input of a power generator (not shown in Fig.) With an input resistance of 1R (1R is the weight ratio of the resistances). This force generator converts into force the current passing through the input resistance 1R, while the magnitude of the force will be proportional to the magnitude of this current. Block 4 of the resistors consists of a series of series-connected resistors with a weight ratio of 1R, 3R, 7R, 15R, 31R, 63R, 127R, 255R, while both outputs of each of these resistors in the chain represent the first input of the block of 4 resistors. One of the final conclusions of the chain is the second input, and the other is the output of the same block of 4 resistors. In this device, in block 3 of the keys, solid-state relays (relays) [3] with galvanic isolation input-output are used. When writing code 80 ₁₆ to register 1, all the relays of block 3 of the keys, except the relay connected to the terminals of the resistor with a weight ratio of 255R, will be in the open state (the resistance of the open relay relative to the value of R is infinitely small), then the analog signal from the output of the DAC 5 will pass to the output bus 8 and, accordingly, to the input of the power generator through all open relays, the resistor 255R and the input resistance 1R of the power generator, which in accordance with this will form a force, the value of which is one two hundred fifty-sixth part of its max small value.

When registering codes 40 ₁₆ , 20 ₁₆ , 10 ₁₆ , 08 ₁₆ , 04 ₁₆ , 02 ₁₆ or 01 ₁₆ into register 1, the power generator will generate one hundred twenty-eighth, one six ten fourth, one thirty second, one sixteenth, one eighth, one the fourth or one second, respectively, part of the force from its maximum value. If the code 00 ₁₆ is written to register 1, all the relays of the key block 3 will be in the open state, then the analog signal from the output of the DAC 5 will completely pass to the output bus 8 and, accordingly, to the input of the power generator, which in accordance with this will form a force maximum value.

One of the main parameters of the indentation cycle is the maximum value of the indenter force on the material under study after a certain time interval from the beginning of this cycle.

At the initial moment of the indentation cycle, the code 80 _{16 is} written to the register 1 from the additional input bus 6. The codes of the magnitude of the force from the input bus 7 are written sequentially in time to register 2 and then are converted into an analog signal in DAC 5, which, passing through the resistor 255R of block 4 resistors and the input resistance of the power generator, equal to 1R, will create a current whose value will be one two hundred and fifty-sixth of its maximum value. After all codes of this part of the maximum value are written to register 2, code 40 _{16 is} written to register 1 and codes of strength values of one hundred twenty-eighth of its maximum value are also sequentially written in register 2 in time. The above cycles of writing codes into register 1 and register 2 continue until the force generated by the force generator reaches the set value of the force of the indenter on the material under study. Thus, the entire indentation cycle consists of several stages, starting with the formation of small signals from the output of the block of 4 resistors, which is equivalent to the operation of the DAC 5 with the weight of its least significant digit equal to one two hundred fifty-sixth of its maximum value, and, accordingly, from the field of formation of small values of the indenter impact forces on the material under study, while the accuracy of determining the physicomechanical properties of materials by the kinetic indentation method increases.

Information sources

[1] RF patent No. 2445673, 11.17.2010

[2] RF patent No. 2445675, 11/17/2010

[3] www.Irf.com PVN 012A PbF

Claims (1)

A data output control device comprising a data memory register, a digital-to-analog converter, an input and output bus, characterized in that it further comprises a register, a key block, a resistor block, and an additional input bus, the register input being connected to an additional input bus, and the output is to the input of the key block, which is connected by its output to the first input of the resistor block, the input of the data memory register is connected to the input bus, and the output is combined with the input of the digital-to-analog converter, the output of which is under for prison to the second input of the resistor unit, the resistor unit output is connected to the output bus.