SU900441A1

SU900441A1 - Analogue-digital converter

Info

Publication number: SU900441A1
Application number: SU802928770A
Authority: SU
Inventors: Александр Дмитриевич Гуляев; Вадим Иванович Емельяненков; Владимир Васильевич Изох; Петр Лаврентьевич Салов
Original assignee: Белорусский Ордена Трудового Красного Знамени Государственный Университет Им.В.И.Ленина
Priority date: 1980-05-23
Filing date: 1980-05-23
Publication date: 1982-01-23

Description

(54) АНАЛОГО-ЦИФРОВОЙ ПРЕОБРАЗОВАТЕЛЬ(54) ANALOG-DIGITAL CONVERTER

Изобретенре относитс к импульсной технике и может быть использовано в измерител х величины сдвижени горных пород, в точном маимностроении и других област х техники.The invention relates to a pulse technique and can be used in measuring the magnitude of the displacement of rocks, in precise engineering and other areas of technology.

Известен аналого-цифровой преобразователь , содержащий источник света, выход которого через вращающеес зеркало и кодовую маску оптически соединен со входами фотоэлементов, выходы которых через фотоэлементы соединены со входом счетчика 1. .- Недос5татком устройства вл етс низкое быстродействие .The analog-to-digital converter is known, which contains a light source whose output through a rotating mirror and a code mask is optically connected to the inputs of photocells, the outputs of which through photocells are connected to the input of counter 1. The low speed of the device is low.

Известен аналого-цифровой преобразователь , содержаицЛ измерительный автогенератор, эталонный генератор , выход которого соединен с первьм входом первого вентил , выходы вентилей через счетчики соединены со входама вычислителей 2.The analog-to-digital converter is known, containing a measuring oscillator, a reference generator, the output of which is connected to the first input of the first valve, and the outputs of the valves are connected to the input of the calculator 2 through counters.

НедосГтатком устройства вл етс низкое быстродействие.The disadvantage of the device is low speed.

Цель изобретени - повышение быстродействи .The purpose of the invention is to increase speed.

Ука.аанна цель достигаетс тем, что в аналого-цифровой преобразователь , содержащий четьфе вентил , первый вход первого из которьвс соединен с выходом эталонного генератора , а выходы -через соответствующие счетчики соединены со входами вычислител , измерительный автогенератор , введены коммутатор, два формировател интервала времени, два элемента И, дополнительный эталонный генератор, причем выход 1 §ммутатора через измерительный автогенератор соединен с первыми входами эле10 ментов И, второй вход первого мента И соединен с выходом эталонного генератора и с импульсным входом первого вентил , а выход - со входом первого формировател интервала вреМ Меии и с имшульсиым входом второго венти ,потенциальный вход которого соединен с потенциальным входом первого вентил и с выходом первого фо1 «ировател интервала времени, This purpose is achieved by the fact that the first input of the first of which is connected to the output of the reference generator, and the outputs — through the corresponding counters are connected to the inputs of the calculator, the measuring autogenerator, a switch is inserted into the analog-to-digital converter containing the valve, and the two time interval formers , two elements And, an additional reference generator, the output 1 of the switch through the measuring oscillator connected to the first inputs of the elements And, the second input of the first ment And connected to the output the reference generator and with the pulse input of the first valve, and the output with the input of the first time interval generator Meia and with the pulse input of the second valve, the potential input of which is connected to the potential input of the first valve and with the output of the first foil “time interval”,

Claims

20, the second input of the second element I is connected to the output of an additional reference generator and to the IHM module of the third valve, and the output to the input of the second time interval generator and to the pulse input of the fourth valve, the potential input of which is connected to the potential input of the third valve and to the output of the second Fyrmyr6va eats a time interval, controlling the equal inputs of the first and third counters are connected to the control inputs of the first and second time interval formers, respectively, into the control outputs One computer is connected to the control input of the switch. The drawing shows the electrical circuit of the device. The device contains a switch 1, a reference generator 2, a measuring oscillator 3, a reference generator 4, elements 5 and 6, time interval formers 7 and 8, valves 9–12, counters 13–16, and a calculator 17. For the first and second info The sensors of the measured displacement and the calibration displacement are connected to the inputs of the co-switch 1. On the first control input of switch 1, it supplies the Start signal. At the initial time, the valves 9-12 are closed, the counters 13-16 are set to zero. Sensors of calibration or measured movement can be connected to the control input of the measuring autogenerator 3 via switch 1. Sensors; identical, the dependence of the period T of the measuring auto-oscillator 3 is of the form T RF E, (1) where R is the proportionality coefficient, F is any function that has its inverse RF function. The start signal is connected to the measuring input of the measuring autogenerator 3 by a calibration displacement sensor fk. The signals from the measuring autoheater 3 and from the reference generator 2 begin to arrive at the inputs of the element And 5, At the instants of time, when the pulses of the compared signals coincide with each other in time, at the output of the element 5, coincidence pulses are formed, which are the envelope group matching pulses. The interval imaging unit 7 opens the valves 9 and 10 by the first coincidence pulse, Counter 13 counts the number of pulses N received through valve 9 from the reference generator 2, and counter 14 counts the number of pulses Pf passed through valve 10 from element And 5. At the moment the time when the contents of counter 13 exceeds / sieve in advance the set number fJo from ngo to shaper 7 of the interval, a signal is given, allowing one of the subsequent pulses to coincide with the gates 9 and 10. After closing the gates 9 and 1, digital 13 is recorded in the counter 13 N th code - the number-periods of the reference oscillator 2, and a counter 14 - p number of coincidences between which the calculated number N. The channel consisting of the measuring oscillator 3, the reference generator 4, the element and 6, the driver 8, the gates 11 and 12, the counters 15 and 16 works similarly. At the time of closing the gates 11 and 12, the digital codes N are recorded in the meters 15 and 16 the number of pulses of the reference generator 4 and p is the number of pulses of coincidence produced by the elements between which the number N is calculated. After closing the last of the pairs of valves 9 and 10, 11 and 12, the calculator 17 calculates the value A using the formula -. v --- and, NI - p NJ and remembers it. Then, the calculator 17 sends to the second control input of the switch 1 a signal by which the switch 1 connects to the control input of the measuring oscillator 3 a sensor of the measured displacement 1x. Counters 13-16 are set to zero. The entire measurement process is great N and p is repeated. I At the time of closing the gates-9 and 10, 11 and 12, the counters 13-16 have the corresponding digital codes N g Rf / 2 After the last of the pairs of gates | 9 and 10,11 are closed and 12, the calculator 17 calculates the value B by the formula NI Na р, - til - Pa N and remembers it. After the calculation of the value B is completed, the measured displacement I is calculated by the formula 1x - IK-F-H-X) (4). The increase in speed is provided by the use of a higher-frequency oscillator, since no direct oscillator count of the oscillator is performed. The invention Analog-to-digital converter containing four valves, the first input of the first of which is connected to the output of the reference generator, and the outputs through the corresponding counters are connected to the inputs of the calculator, measuring the automatic oscillator, which, in order to improve speed, introduced a switch, two forshrovatotel time interval, two elements And, additional reference generator, and vysod switch through a measuring oscillator is connected to the first inputs of elements And, the second the stroke of the pin element is And is connected to the vyzodom. the reference generator and with the pulse input of the first valve, and the output with the input of the first time interval generator and with the pulse input of the second valve, the potential input of which is connected to the potential input of the first valve and with the output of the first time interval generator, the second input of the second element And is connected to the output of the additional coupon generator and with the pulse input of the third valve, and the output with the input of the second generator of the time interval and with the pulse input of the fourth valve, the potential input cat Horn / e connected to potentsial1 / f:

The third input of the third valve and with the output of the first time interval generator, the control outputs of the first and third counters are connected to the control unit 1-1 and the inputs of the first and second time interval generator, respectively, and the control output of the calculator is connected to the control input of the switch. Sources of information taken into account in the examination 1. V. Shlndin. Digital electrical measuring instruments, M., Energie, 1972, p. 21, .. -, a certificate of the USSR 383207, cl. H 03 K 13/18, 1973 (prototype).