SU970674A1 - Analogue-digital converter analogue-digital cavity of angular values with linearized output characteristics - Google Patents

Description

The invention relates to automation and computing and can be used in digital automatic control systems. control

A known angular transducer has a linear rotary transformer, a switch, a threshold and summing device, a bias device, and a logic circuit lT.

The disadvantages of this device are its low accuracy and complexity.

The closest to the present invention is an analog-to-digital angle converter with a linearized output characteristic, containing a counter, AND, OR, register, trigger, pulse generator, and pulse angle-frequency converter 12J.

The known device has a high linearization accuracy, however, is characterized by the complexity of implementation.

The purpose of the invention is to simplify the converter.

The goal is achieved by the fact that in an integrated digital digitizer of angular values with a linearized output characteristic containing a trigger, the output of which is connected to one input of the element I, the output of which is connected to the information input of the counter, a clock pulse generator, an angle-frequency converter named after pulses, frequency filter and shaper time interval introduced,

10 the output of which is connected to the first input of the trigger and the installation input of the counter, the output of the converter of the angle frequency of the pulses is connected to the other input of the element I and through the frequency

15 filter with a control input of the driver of the time interval, the output of the clock pulse generator is connected to the BTOpbHvj trigger input and the master input of the temporary driver

20 intervals.

FIG. 1 shows a block diagram of an analog-digital converter of angular values with a linearized output characteristic}

25 in FIG. 2 - graphs that show the work of the proposed converter,. where a is the real output characteristic of the angle-frequency pulse converter; b - perfect weekend

Claims (2)

30 characteristic; c - linearized output characteristic; g - corrected output characteristic; Analog-to-digital angle converter with a linearized output characteristic contains an angle-frequency pulse converter 1, a frequency filter 2, an AND 3 element, a time interval generator 4, a clock generator 5, a trigger 6 and a counter 7. The converter works in the following way. The pulse of the clock generator 5 transfers the trigger to the unit state, as a result of which a single input of the element I 3 is applied / voltage from the direct output of the trigger and the pulses of the converter 1, the pulse angle with a certain frequency begins to flow to the input of the meter 7. At the same time generator of 5 clock pulses affects the time interval generator, which, after time T, generates a pulse that returns a trigger and a counter to the zero (initial) state i The number of pulses received on the counter to 7, N, f where f is the frequency at the output of the converter 1 angle-frequency pulses at the time of arrival of the first clock pulse. Frequency filter 2 is designed in such a way that at the moment it is reached. Neither the frequency f of the ff ,, value at its output generates a signal that acts on the shaper of 4 time intervals, which after this produces an output pulse through the time after the clock TO + lT, th pulse arrives on it. And where dT const. As a result, the number of pulses received at counter 7 with f „, N f.-Ti uT) -o. where N4 + 4. dT Nd + D N O 4- ft D M the number of pulses that would be sent to the counter without correction: IMd N N - N4. The proposed converter works similarly. Thus, the corrected characteristic of the transducer 1, the pulse frequency, approaches the linear theoretical characteristic, thus increasing the resulting accuracy of the transducer. The proposed converter is characterized by simplicity of implementation, reliability in operation, possibility of use in any types of ADCs: displacement-frequency, voltage-frequency, current-frequency, etc. Analog-to-digital angle converter with linearized output characteristic, comprising a trigger, the output of which is connected to one input of the element I, the output of which is connected to the information input of the counter, a clock pulse generator, an angle-frequency pulse converter, distinguished by the fact that for the sake of simplicity, a frequency filter and a time interval generator, the output of which is connected to the first input of the trigger and the installation input of the counter, are entered into it, the output of the transducer is perturbed pulses simplicity connected to another input of AND and through a frequency filter to the control input of the time slots, the clock pulse generator output is connected to the second input of the flip-flop and the setpoint input of the time slots. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 362590, class, H 03 K 13/32, 1970. 2. USSR author's certificate No. 463976, cl. G 06 F 11/00, 1973 (prototype). jf .. P M I / I Go Jo / V t go Thats Thats - f / # x r xs X A / I Wi M A /, H "6 // N4 Nj