SU1247772A1

SU1247772A1 - Digital frequency meter

Info

Publication number: SU1247772A1
Application number: SU853855446A
Authority: SU
Inventors: Владимир Петрович Псурцев; Александр Сергеевич Терентьев; Александр Леонидович Лилеин
Original assignee: Московский Ордена Трудового Красного Знамени Физико-Технический Институт
Priority date: 1985-02-19
Filing date: 1985-02-19
Publication date: 1986-07-30

Abstract

Изобретение относитс к электро измерительной технике. Может быть использовано дл цифрового измерени частоты. Целью изобретени вл етс ;расширение динамического диапазона и сокращение времени измерени . Дл достижени поставленной цели в цифровой частотомер дополнительно введен регистр, а формирователь весовой функции выполнен в виде последовательно соединенных второго счетчика и программируемого посто нного запоминающего устройства. На чертеже показаны: генератор 1 опорной частоты, формирователь 2 и 5 импульсов, первый 3 и второй 11 счетчики, формирователь 4 весовой функции, накапливающий сумматор 6, регистр 7, дешиф-. ратор 8, индикатор 9, вход 10 цифрового частотомера, программируемое . посто нное запоминающее устройство Это устройство программируетс так, что сумма коэффициентов весовой функции равна единице. При этом оценкой измер емой частоты вл етс накоп- .ленное число, выраженное в единицах опорной частоты. 1 з.п. ф-лы, 1 ил. (Л СThe invention relates to electrical measuring equipment. Can be used for digital frequency measurement. The aim of the invention is to increase the dynamic range and shorten the measurement time. To achieve this goal, a register is additionally introduced into the digital frequency meter, and the weighting function driver is made in the form of a serially connected second counter and a programmable read-only memory. The drawing shows: 1 reference frequency generator, shaper 2 and 5 pulses, first 3 and second 11 counters, shaper 4 weight functions, accumulator adder 6, register 7, decrypt-. Rator 8, LED 9, digital frequency counter input 10, programmable. read only memory This device is programmed so that the sum of the coefficients of the weighting function is equal to one. In this case, the estimate of the measured frequency is the accumulated number expressed in units of the reference frequency. 1 hp f-ly, 1 ill. (Ls

Description

Изобретение относитс в электроизмерительной технике и может быть использовано дл цифрового измерени частоты.The invention relates to electrical measuring technology and can be used for digital frequency measurement.

Целью изобретени вл етс расширение динамического диапазона и сокращение времени измерени .The aim of the invention is to expand the dynamic range and reduce the measurement time.

На чертеже приведена схема цифрового частотомера.The drawing shows a diagram of a digital frequency meter.

Цифровой частотомер содержит генератор 1 опорной частоты, первый формирователь 2 импульсов, пурвый счетчик 3 импульсов, формирователь 4 весовой функции, второй формирователь 5 импульсовi накапливающий сумматор 6, регистр 7, дешифратор 8, индикатор 9, вход 10 цифрового частотомера , а формирователь 4 ве совой. функции содержит второй .счетч1п 11 и программируемое посто нное запоми- ;нающее устройство 12.The digital frequency meter contains 1 reference frequency generator, the first shaper 2 pulses, the purple counter 3 pulses, shaper 4 weight functions, the second shaper 5 pulses accumulating adder 6, register 7, decoder 8, indicator 9, input 10 of the digital frequency meter, and shaper 4 . the function contains a second .account 11 and a programmable permanent storage device 12.

В цифровом частотомере формирователь 4 весовой функции, накапливающий сумматор 6, регистр 7, дешифратор 8In the digital frequency meter shaper 4 weight function, accumulating adder 6, register 7, decoder 8

счетчика 3. Короткие положительные импульсы с выхода первого счетчика 3 пе15еписывают своим фронтом на регист 7 накопленное число с накапливающегоcounter 3. Short positive pulses from the output of the first counter 3 write their front to register 7 the accumulated number from the accumulating

с сумматора 6, а также сбрасывают в нуль нaкaпл вaющий сумматор 6 и формирователь 4 весовой функции. В паузах между импульсами с выхода первого счетчика 3 в накапливающемfrom the adder 6, and also reset to zero the adder adder 6 and the former 4 of the weight function. In the pauses between pulses from the output of the first counter 3 in the accumulating

JO сумматоре 6 накапливаютс весовые коэффициенты с частотой следовани импульсов с выхода второго формировател 5 импульсов, равной нзмер - . емой частоте на входе 10 цифровогоJO adder 6 accumulates weights with a pulse frequency from the output of the second driver 5 pulses equal to nsmer -. frequency to input 10 digital

15 частотомера.15 frequency counter.

Программируемое посто нное запоми нающее устройство 12 формировател весовой функции программируетс так что сумма п коэффициентов весовойA programmable permanent memory device 12 of the driver of the weight function is programmed so that the sum n of the weight coefficients

20 функции равна единице, поэтому оценкой измер емой частоты вл етс накопленное число, выраженное в едини цах опорной частоты. Например, если20 is equal to one, therefore, the estimate of the measured frequency is the accumulated number, expressed in units of the reference frequency. For example, if

ент накапливаетс в накапливающем сумматоре б m раз, поэтому накоплен ное число в тп раз больше единицы, т.е. оценкой частоты вл етс mFo .The envelope accumulates in the accumulating adder b m times, therefore the accumulated number is three times larger than one, i.e. frequency estimate is mFo.

30thirty

II

Claims

1. A digital frequency meter containing a series-connected reference frequency generator, a first pulse shaper and a first pulse counter, a series-connected decoder and an indicator, as well as containing a second pulse shaper, accumulating an adder and shaper of a weight function; and in order to expand the dynamic range and reduce the measurement time, a register is entered, all inputs of which are connected to the inputs of the decoder; the information inputs of the register are connected to the outputs on and the synchronization input of the register is connected to the reset inputs of the accumulating adder and shaper of the weight function, as well as the output of the first counter, the input of which is connected to the synchronization input of the shaper of the weight function, the outputs of which are connected to the information inputs of the accumulating adder, the synchronization input of which is connected to the output second formiro

counter 3. Short positive pulses from the output of the first counter 3 write their front to register 7 with the accumulated number from the accumulating

From adder 6, and also dropping to zero the adder adder 6 and the former 4 of the weight function. In the pauses between pulses from the output of the first counter 3 in the accumulating

JO adder 6 accumulates weights with a pulse frequency from the output of the second driver 5 pulses equal to nsmer -. frequency to input 10 digital

15 frequency counter.

The programmable read-only memory 12 of the driver 4 of the weight function is programmed so that the sum n of the weighting factors

20 is equal to one, therefore, the estimate of the measured frequency is the accumulated number expressed in units of the reference frequency. For example, if

The envelope accumulates in the accumulating adder b m times, therefore the accumulated number is tp times one, i.e. frequency estimate is mFo.

thirty

I

Invention Formula

Since the measured frequency is equal to m Fo (Fg 35 1 / That), then each weighting factor

Since the measured frequency is equal to m Fo (Fg 1 / Then), then each weighting factor is

1. Digital frequency meter, containing a series-connected reference frequency generator, the first form. world of pulses and the first pulse counter, successively connected to the decoder and indicator, as well as containing the second pulse shaper, accumulating the adder and driver of the weight function, so that, in order to expand the dynamic range and reduce the measurement time, the register is entered, all the inputs of which are connected to the decoder inputs are information inputs of the register connected to the accumulating outputs of the accumulator, and the synchronization input of the register connected to the reset inputs of the accumulating sum ora shaper and the weight function, as well as output of the first counter, whose input is connected to the input synchronization shaper weighting function which outputs are connected to data inputs of the accumulator, whose clock input is connected to the output of the second formiro3 12477724

pulse pulses, the input of which is in the memory storage device, is exhausted from the input of the device. the outputs of which are the outputs of farm2, the frequency meter according to claim 1, about the weight of the weight function, the input

due to the fact that its synchronization is input

The weight function is executed in the form of 5 synchronization of the second counter, and

consecutively connected by a second input reset - a second input input

counter and programmable station n-counter.