SU463976A1 - Correction device - Google Patents

Description

(54) CORRECTIVE DEVICE

The invention relates to the field of computer technology, in particular to digital correction devices, and can be used in systems for collecting and processing information.

A correction device is known that contains a measurement result counter, a register whose outputs are connected to one input of the corresponding AND circuits, the other inputs of which are connected to the outputs of a counter-frequency divider, and the outputs of the AND circuits OR to the counting input of the measurement result counter.

A disadvantage of the known device is low speed.

In order to increase speed, the proposed device contains a correction result counter, a trigger, a pulse generator, the first and second coincidence circuits, the outputs of the counter-frequency divider are connected to the first trigger input through the first coincidence circuit, the other input to the trigger input of the device, whose information inputs connected to the counter inputs of the measurement result, one group of outputs of which is connected to the outputs of the device, and the other group - to the bit inputs of the counter-frequency divider page the enclosing input of which is connected to one trigger output, the other output of which and the output of the pulse generator are connected via a second matching circuit to the counting input of a frequency divider counter, and the output of the OR circuit is connected to the counting input of a correction result counter, the outputs of which are connected to the register inputs.

The drawing shows a block diagram of the proposed device.

The correction device contains a counter-divider of frequency 1, circuit "AND 2, circuit" OR 3, counter 4 of the measurement result, register 5, counter-6 of the correction result, circuit

matches 7 and 8, trigger 9, pulse generator 10.

The device works as follows. Since most of the sensors used have some non-linearity,

there is a need to eliminate this nonlinearity. The process of eliminating nonlinearity (linearization) is carried out using a correction function approximated by the required number of straight line segments.

Let, on some r-th segment (straight line segment), to each Kg pulses obtained as a result of measuring the initial function f (x), is added (or subtracted) / t pulses. Then, by converting the current value of the function f (x) into a transponchional time interval, you can change the value of this interval with a certain frequency

 ki

fi h (l ±

where fi is the coding frequency; / o - clock frequency;

, /,

fo is the frequency of correction.

ki

To reduce the correction time, the value of the time interval can be reduced by n times, and the frequency of correction, respectively, increased by n times. The value of n depends on the limiting frequency of the elements

L

devices, the value of l / o - should not

ki

exceed value / o.

Now, its value of the function, obtained from the output of the sensor in the form of a parallel code, is entered into the counter of the measurement result.

At the initial moment of operation from trigger 9, the gate input of the counter-divider 1 frequency receives the write enable signal in the reverse code of the nth part of the parallel code (the reverse code is needed to fill and reset when the clock pulses from the generator 10 pulses of the separator I counter frequency), as a result of which the time of converting a parallel code into a time interval is fixed. The number of clock pulses of the generator 10 pulses is equal to the direct code recorded in the counter 4 measurement results.

When trigger 9 is started, a coincidence circuit 8 is opened, and the clock pulses of the pulse generator 10 are passed to the counting input of the frequency divider counter 1. Depending on the value of the coefficient determined by the contents of register 5, the pulses that pass through the coincidence circuit 2, the OR 3 circuit, expire on the counter 6 of the correction result, which reads the number of received pulses to a certain value, as a result of which the coefficient in register 5 changes.

5 Simultaneously, the impulses from the output of the OR 3 circuit, the number of which represents the current, its value of the correction function, are added to the contents of the counter 4 of the measurement result, which ensures linearization of the nonlinearity of the sensor characteristics.

Subject invention

Correction device containing

5 measurement result counter, the register whose outputs are connected to one input of the corresponding AND circuits, the other inputs of which are connected to the outputs of the frequency divider counter, and the outputs of the AND circuit through the OR circuit to the counting input of the measurement result counter, characterized in that In order to increase speed, it contains a correction result counter, a trigger, a pulse generator, the first and second coincidence circuits, and the outputs of the counter-frequency divider are connected to the single trigger input via the first coincidence circuit. EPA, its other input connected to the trigger input of device, information

0 inputs of which are connected to the inputs of the meter of the measurement result, one group of outputs of which is connected to the outputs of the device, and the other group - to the discharge inputs of the counter-frequency divider, strobing

5 whose input is connected to one trigger output, the other output of which and the output of the pulse generator through the second coincidence circuit are connected to the counting input of the counter-frequency divider, and the output of the circuit

0 "OR connected to the counting input of the counter of the result of the correction, the outputs of which are connected to the inputs of the register.

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