SU808934A1

SU808934A1 - Digital meter of speed and speed ratio

Info

Publication number: SU808934A1
Application number: SU792710514A
Authority: SU
Inventors: Валерий Сергеевич Лалазарьянц; Петр Петрович Шпак; Елена Михайловна Бицадзе
Original assignee: Предприятие П/Я Р-6491
Priority date: 1979-01-10
Filing date: 1979-01-10
Publication date: 1981-02-28

Description

Изобретение относится к измерительной технике и может быть использовано, в частности, для измерения скорости и соотношения скоростей рабочих органов металлорежущего стан- * ка.The invention relates to measuring equipment and can be used, in particular, for measuring the speed and speed ratio of the working bodies of a metal-cutting machine *.

Известны цифровые измерители, содержащие частотный датчик, счетчик импульсов, блок задания временных интервалов, блок индикации и блок •/правления [1], [2].Known digital meters containing a frequency sensor, a pulse counter, a unit for setting time intervals, an indication unit and a block • / board [1], [2].

Недостаток этих устройств состоит в том, что их технологические возможности ограничены измерением скорости вращения только одного ра- 15 бочего органа.The disadvantage of these devices is that their technological capabilities are limited by measuring the rotation speed of only one working body.

Наиболее близким к предлагаемому является устройство, содержащее импульсные датчики эталонной и сравниваемой частоты, счетчики импульсов, 20 подключенные к датчикам через схемы совпадения, блок индикации, триггеры, формирователи, реле времени. Время измерения определяется емкостью счетчика импульсов эталонной частоты и 25 величиной эталонной частоты [31.Closest to the proposed one is a device containing pulse sensors of the reference and compared frequencies, pulse counters, 20 connected to the sensors through matching circuits, an indication unit, triggers, shapers, timers. The measurement time is determined by the capacity of the pulse counter of the reference frequency and 25 by the value of the reference frequency [31.

Недостатком устройства является то, что при измерении соотношения скоростей двух рабочих органов, скорость которых·нестабилизирована и из- 30 меняется в широких пределах, в соответствии с изменением скорости будет изменяться и точность измерения. Кроме того, известное устройство не позволяет производить измерение скорости рабочего органа наряду с измерением соотношения скоростей.The disadvantage of this device is that when measuring the ratio of the speeds of two working bodies, the speed of which is · unstabilized and varies over a wide range, the measurement accuracy will also change in accordance with the change in speed. In addition, the known device does not allow the measurement of the speed of the working body along with the measurement of the ratio of speeds.

Цель изобретения - повышение быстродействия работы измерителя наряду с сохранением заданной точности измерения во всем диапазоне изменения скоростей.The purpose of the invention is to increase the speed of the meter along with maintaining the specified measurement accuracy over the entire range of speeds.

Указанная цель достигается тем, что в измеритель скорости и соотношения скоростей, содержащий датчики эталонной и сравниваемой частоты, счетчики импульсов эталонной и сравниваемой частоты и блок индикации, введены анализатор частоты, выполненный на первой и второй схемах совпадения, первый и второй триггеры диапазонов измерения эталонной частоты, третья, четвертая, пятая, шестая, седьмая и восьмая схемы совпадения, блок управления, триггер разрешения , счета.и декадный делитель, при этом датчик эталонной частотй соединен со счетным входом счетчика импульсов эталонной частоты и связан с первым входом блока управления через первый прямым выходом триггера разресчета третьим входом четвертой совпадения и первым входом схемы совпадения.' Первый вход вход третьей схемы совпадения, подключенной вторым входом к инверсному выходу первого триггера диапазонов измерения эталонной частоты и второму входу восьмой схемы совпадения. Третий вход третьей схемы совпадения подключен к инверсному выходу |второго триггера диапазонов измерения эталонной частоты и первому входу восьмой схемы совпадения; Четвертый вход третьей схемы совпадения соединен с шения схемы пятой четвертой схемы совпадения соединен ¹с прямым выходом первого триггера диапазонов измерения эталонной частоты и первым входом шестой схемы совпадения. Второй вход четвертой схемы совпадения соединен с выходом счетчика импульсов эталонной частоты. < Второй вход пятой схемы совпадения соединен со старшим разрядом счетчика импульсов эталонной частоты, а третий вход пятой схемы совпадения соединен с прямым выходом второго триггера диапазонов измерения эталонной частоты первым входом нулевой установки первого триггера диапазонов измерения эталонной частоты и первым входом седьмой схемы совпадения. Выходы четвертой и пятой схем совпадения соединены соответственно со вторым и третьим входами блока управления, а четвертый вход блока управления соединен с инверсным выходом, триггера разрешения счета и четвертыми входами первой и второй < схем совпадения анализатора частоты, первый, второй и третий входы которых соединены с разрядами счетчика импульсов эталонной частоты, первый вход нулевой установки которого соединен с единичным входом триггера разрешения счета и вторым выходом блока управления. Второй вход нулевой установки счетчика им- . пульсов эталонной частоты соединен с нулевыми входами триггеров диапазонов измерения и разрешения счета и первым выходом блока управления. Единичные входы первого и второго триггеров диапазонов измерения эталонной частоты соединены соответственно с выходами первой и второй схем совпадения. Третий выход блока управления соединен со входами нулевой установки счетчика импульсов сравниваемой частоты и декадного делителя, счетный вход которого соединен с датчиком сравниваемой частоты и третьим входом восьмой схемы совпадения. Первый выход декадного делителя соединен со вторым входом шестой схемы совпаде-г ния, а второй выход декадного делите-t ля соединен со вторым входом седьмой схемы совпадения.Выходы шестой, седьмой и восьмой схем совпадения соеди35 иены соответственно с первым, вторым и третьим счетными входами счетчика импульсов сравниваемой частоты. Четвертый и пятый выходы схем управле·* ния соединены соответственно со входами сброса и записи блока индикации, соединенного также с выходом счетчика импульсов сравниваемой частоты.This goal is achieved by the fact that a speed analyzer made on the first and second matching circuits, the first and second triggers of the measurement ranges of the reference frequency are introduced into the speed and velocity ratio meter, which contains sensors of the reference and compared frequencies, pulse counters of the reference and compared frequencies and an indication unit , third, fourth, fifth, sixth, seventh and eighth coincidence schemes, control unit, resolution trigger, counts. and a ten-day divider, while the reference frequency sensor is connected to the counting input m counter pulses and the reference frequency is connected to the first input of the control unit through the first direct access trigger razrescheta third input and a fourth matching first input matching circuit. ' The first input is the input of the third matching circuit, connected by the second input to the inverse output of the first trigger of the measuring ranges of the reference frequency and the second input of the eighth matching circuit. The third input of the third matching circuit is connected to the inverse output | of the second trigger of the measuring ranges of the reference frequency and the first input of the eighth matching circuit; The fourth input of the third matching circuit is connected to the circuit of the fifth fourth matching circuit connected ¹ to the direct output of the first trigger of the measuring ranges of the reference frequency and the first input of the sixth matching circuit. The second input of the fourth matching circuit is connected to the output of the pulse counter of the reference frequency. <The second input of the fifth coincidence circuit is connected to the highest bit of the pulse frequency counter of the reference frequency, and the third input of the fifth coincidence circuit is connected to the direct output of the second trigger of the measurement ranges of the reference frequency by the first zero input of the first trigger of the measurement ranges of the reference frequency and the first input of the seventh coincidence circuit. The outputs of the fourth and fifth matching circuits are connected respectively to the second and third inputs of the control unit, and the fourth input of the control unit is connected to an inverse output of the count resolution trigger and the fourth inputs of the first and second <matching circuits of the frequency analyzer, the first, second and third inputs of which are connected to bits of the pulse counter of the reference frequency, the first input of the zero installation of which is connected to a single input of the trigger resolution of the account and the second output of the control unit. The second input of the zero counter installation is im-. pulses of the reference frequency is connected to the zero inputs of the triggers of the measuring ranges and resolution of the account and the first output of the control unit. The single inputs of the first and second triggers of the measurement ranges of the reference frequency are connected respectively to the outputs of the first and second matching circuits. The third output of the control unit is connected to the inputs of the zero setting of the pulse counter of the compared frequency and the ten-day divider, the counting input of which is connected to the sensor of the compared frequency and the third input of the eighth matching circuit. The first output of the ten-day divider is connected to the second input of the sixth matching circuit, and the second output of the ten-day divider is connected to the second input of the seventh matching circuit. The outputs of the sixth, seventh, and eighth matching circuits are connected to the first, second, and third counting inputs, respectively counter of pulses of the compared frequency. The fourth and fifth outputs of the control circuits · * are connected respectively to the reset and write inputs of the display unit, which is also connected to the output of the pulse counter of the compared frequency.

На фиг. 1 представлена функциональная схема устройства; на фиг. 2 · диаграмма входных и выходных сигналов блока управления.In FIG. 1 shows a functional diagram of a device; in FIG. 2 · diagram of the input and output signals of the control unit.

Предлагаемое устройство состоит из датчиков 1 и 2 импульсов с частотами, пропорциональными соответственно эталонной и сравниваемой скорости, счетчиков 3 и 4 импульсов эталонной и сравниваемой скоростей, блока 5 индикации, анализатора 6 частоты, собранного на первой и второй схемах 7 и 8 совпадения, первого и второго триггеров 9 и 10 диапазонов изменения эталонной скорости, причем число ячеек совпадения в анализаторе частоты и ?риггеров диапазонов на 1 меньше числа диапазонов, третьей, четвертой и пятой схем 11, 12 и 13 совпадения, блока 14 управления, триггера 15 разрешения счета, декадного делителя 16 частоты и шестой, седьмой и восьмой схем 17·, 18 и 19 совпадения.The proposed device consists of sensors 1 and 2 pulses with frequencies proportional to the reference and compared speeds, counters 3 and 4 pulses of the reference and compared speeds, display unit 5, frequency analyzer 6, assembled on the first and second matching circuits 7 and 8, the first and second triggers of 9 and 10 ranges of changes in the reference speed, and the number of coincidence cells in the frequency analyzer and? range triggers is 1 less than the number of ranges, the third, fourth and fifth coincidence circuits 11, 12 and 13, control unit 14 , trigger 15 resolution accounts, ten-day frequency divider 16 and the sixth, seventh and eighth schemes 17 ·, 18 and 19 matches.

Датчик 1 эталонной частоты используется при измерении соотношения скоростей, он представляет собой импульсный преобразователь угла поворота или линейного перемещения в число импульсов, частота которых пропорциональная скорости ведущего (эталонного) рабочего органа, а датчиком 2 импульсов сравниваемой скорости слу-< жит преобразователь угла поворота или линейного перемещения в число импульсов, сочленяемый с рабочим органом, скорость которого или отношение скорости которрго к скорости эталонного рабочего органа изменяется, в частности, в рассматриваемом цифровом изме-е рителе, разработанном для измерения минутных или оборотных подач металлорежущего станка, на эталонный рабочий орган принят шпиндель (планшайба), относительно скорости которого измеряется скорость перемещения суппорта (так называемая оборотная подача).Sensor 1 of the reference frequency is used to measure the ratio of speeds, it is a pulse converter of the angle of rotation or linear displacement into the number of pulses whose frequency is proportional to the speed of the leading (reference) working body, and sensor 2 of the pulses of the compared speed serves as a converter of the angle of rotation or linear movement in the number of pulses, articulated with a working body, the speed of which or the ratio of the speed of which to the speed of the reference working body changes, in particular , in the digital meter under consideration, designed to measure minute or revolving feeds of a metal cutting machine, a spindle (faceplate) was adopted on the reference working body, relative to the speed of which the caliper displacement speed (the so-called reverse feed) is measured.

В режиме измерения соотношения скоростей(оборотной подачи) устройство работает следующим образом.In the mode of measuring the ratio of speeds (reverse feed), the device operates as follows.

Цикл измерения включает в себя грубую оценку скорости вращения планшайбы и, в соответствии с этим, выбор диапазона, осуществляемые в течение 0,2 с с помощью счетчика 3, анализатора 6 частоты, триггеров 9, 10 и 15 и непосредственного измерения относительной скорости подачи. Время измерения равно периоду сле дования импульсов, снимаемых с выхода одной из ячеек 11, 12 или 13 совпадения в зависимости от выбранного диапазона.The measurement cycle includes a rough estimate of the faceplate rotation speed and, accordingly, range selection carried out for 0.2 s using a counter 3, frequency analyzer 6, triggers 9, 10 and 15 and direct measurement of the relative feed rate. The measurement time is equal to the pulse repetition period taken from the output of one of the coincidence cells 11, 12, or 13, depending on the selected range.

Работа всех узлов устройства синхронизируется импульсами начальной установки TR1, формируемыми блоком 14 управления. Период следования синхронизирующих импульсов равен времени индикации.The operation of all nodes of the device is synchronized by the pulses of the initial installation TR1, formed by the control unit 14. The repetition period of synchronizing pulses is equal to the indication time.

В исходном состоянии сигналами «л TR1., TR2, TR3, счетчики 3, 4 и 16,. блок 5 индикации и триггеры 9, 10 и 15 установлены в нуль, при этом нулевьм сигналом с прямого выхода трйггера 15 схемы 11, 12 и 13 совпадения заперты.In the initial state, the signals “l TR1., TR2, TR3, counters 3, 4 and 16 ,. the indication unit 5 and the triggers 9, 10 and 15 are set to zero, while the zero signal from the direct output of the trigger 15 of the coincidence circuit 11, 12 and 13 is locked.

Цикл измерения начинается с исчезновением импульса TR1 сброса в нуль счетчика 3, при этом он в течение 0,2 с подсчитывает импульсы датчика 1, тем самым приближенно определяя 26 скорость вращения планшайбы, если последняя окажется в пределах первого диапазона скоростей, на выходе анализатора 6 частоты сигналы отсутствуют и триггеры 9 и 10 второго 25 третьего диапазонов остаются в исходном состоянии. При этом с инверсных выходов триггеров 9 и 10 на вход схем 11 и 19 совпадения поступают единич ные сигналы, подготавливающие эти схемы к работе, а схемы 12, 13, 17 и 18 совпадения оказываются запертыми до конца цикла измерения нулевьвии сигналами с прямых выходов триггеров 9 и 10. 35The measurement cycle begins with the disappearance of the reset pulse TR1 of counter 3 to zero, while it counts the pulses of sensor 1 for 0.2 s, thereby approximately determining the faceplate rotation speed 26, if the latter is within the first speed range, at the output of the frequency analyzer 6 there are no signals and triggers 9 and 10 of the second 25 of the third ranges remain in their original state. In this case, from the inverse outputs of triggers 9 and 10, single signals are input to the coincidence circuits 11 and 19, which prepare these circuits for operation, and coincidence circuits 12, 13, 17 and 18 are locked until the end of the null measurement cycle by signals from the direct outputs of triggers 9 and 10. 35

При поступлении, по истечении ³³ Upon admission, after ³³

0,2 с,на единичный вход триггера 15 разрешения счета импульса TS1, он устанавливается в единичное состояние, запирая нулевым сигналом инверсного выхода схемы 7 и 8 совпадения 40 анализатора 6 частоты и подает единичный сигнал своего прямого выхода на вход схемы 11 совпадения, разрешая прохождение через нее импульсов датчика 1. При поступлении первого 45 импульса датчика 1 через схему 11 на первый вход блока 14 управления, на его третьем выходе появляется импульс TR2 сброса, обнуляющий счетчик 4 индикации, который начинает подсчитывать импульсы датчика 2 измеряемой скорости, поступающие на его счетный вход через схему 19 совпадения , за период следования импульсов эталонной частоты. __0.2 s, to the single input of the trigger 15 of the pulse count resolution TS1, it is set to a single state, locking the inverse output of the circuit 7 and 8 of the coincidence 40 of the frequency analyzer 6 with a zero signal and supplies a single signal of its direct output to the input of the coincidence circuit 11, allowing passage through it the pulses of the sensor 1. When the first 45 pulses of the sensor 1 are received through the circuit 11 to the first input of the control unit 14, a reset pulse TR2 appears on its third output, resetting the display counter 4, which starts counting the sensor pulses 2 measured speed, arriving at its counting input through the coincidence circuit 19, for the period following the pulses of the reference frequency. __

При поступлении импульса,датчика ³³1 в конце интервала времени индикации блок 14 управления формирует сдвинутые друг относительно друга импульсы TR3, TS2, TR2. При этом результат измерения, зафиксированный 60 в счетчике 4, перезаписывается Импульсом TS2 в блок 5 индикации. Одновременно с появлением импульса TR.2 обнуления счетчика 4 блок управления выдает импульс TR1, по окончании ко- 65 торого вся схема измерителя оказывается в исходном состоянии, и цикл измерения повторяется.When a pulse is received, the sensor ³³ 1 at the end of the display time interval, the control unit 14 generates pulses TR3, TS2, TR2 shifted relative to each other. In this case, the measurement result, recorded 60 in the counter 4, is overwritten by the TS2 Pulse in the display unit 5. Simultaneously with the appearance of pulse TR.2 of resetting counter 4, the control unit generates pulse TR1, at the end of which the entire meter circuit is in the initial state, and the measurement cycle is repeated.

Если скорость вращения планшайбы в процессе ее грубой оценки окажетсы э пределах второго диапазона скоростей, на выходе схемы 7 совпадения анализатора 6 появляется единичный сигнал, поступающий на вход триггера 9 второго диапазона и устанавливающий его в единичное состояние. При этом схемы 12 и 17 подготавливаются к работе, а схемы 11, 13, 18 и 19 оказываются заперты до конца цикла измерения.If the rotation speed of the faceplate during its rough estimation is within the second speed range, at the output of the coincidence circuit 7 of analyzer 6, a single signal appears at the input of trigger 9 of the second range and sets it to a single state. In this case, circuits 12 and 17 are prepared for operation, and circuits 11, 13, 18 and 19 are locked until the end of the measurement cycle.

< При перебросе триггера 15 в единичное состояние схемы 12 и 17 совпадения подключаются в работу..При этом через схйму 12 на второй вход блока 14 управления поступают импульсы с выхода 8 счетчика 3, период следования которых в 10 раз больше периода импульсов датчика 1 планшайбы, а счетчик 4 индикации за время, равное периоду следования импульсов на втором входе блока 14 управления, подсчитывает импульсы, поступающие е выхода 8 делителя 16 частоты через схему 17, частота которых в 10 раз меньше частоты импульсов датчика 2.<When the trigger 15 is transferred to the single state, the circuits 12 and 17 coincide with the operation .. In this case, through the circuit 12, the second input of the control unit 14 receives pulses from the output 8 of the counter 3, the repetition period of which is 10 times the pulse period of the sensor 1 faceplate, and the counter 4 displays for a time equal to the period of the pulses at the second input of the control unit 14, counts the pulses received from the output 8 of the frequency divider 16 through the circuit 17, the frequency of which is 10 times less than the pulse frequency of the sensor 2.

Аналогично работает схема в случае/ когда скорость планшайбы находится в пределах третьего диапазона.Similarly, the scheme works in the case when the faceplate speed is within the third range.

В этом случае на выходе схемы 8 совпадения анализатора 6 частоты появляется единичный сигнал, поступающий на вход триггера 10 третьего дин? апазона и устанавливающий его в единичное состояние. Триггер 9 второго диапазона устанавливается при этом в нулевое состояние, а, следовательно, схемы 11, 12, 17 и 19 совпадения, до конца цикла измерения оказываются запертьао! нулевыми сигналами, поступающими на их входы с прямого выхода триггера 9 и инверсного выхода триггера 10, а схемы 13 и 18 подготавливаются к работе.In this case, at the output of the coincidence circuit 8 of the frequency analyzer 6, a single signal appears at the input of trigger 10 of the third din? azone and setting it to a single state. In this case, the trigger 9 of the second range is set to zero, and, therefore, the coincidence circuits 11, 12, 17, and 19 turn out to be locked until the end of the measurement cycle! zero signals arriving at their inputs from the direct output of trigger 9 and the inverse output of trigger 10, and circuits 13 and 18 are prepared for operation.

При перебросе триггера 15 разрешения счета в единичное’ состояние частота датчика 1, поделенная счетчиком на 100, подается с его выхода 80 ч. через схему 13 совпадения на третий вход блока 14 управления, а счетчик индикации эа время, равное периоду следования импульсов на третьем входе блока 14 управления, подсчитывает импульсы, частота которых вWhen transferring the trigger 15 of the resolution of the count to a single 'state, the frequency of the sensor 1, divided by a counter of 100, is supplied from its output for 80 hours through the coincidence circuit 13 to the third input of the control unit 14, and the indication counter is equal to the pulse repetition period at the third input block 14 of the control, counts the pulses, the frequency of which

100 раз меньше частоты импульсов датчика 2, поступающего на его синхровход через схему 18 совпадения с выхода 80 делителя 16 частоты.100 times less than the pulse frequency of the sensor 2, arriving at its synchro input through the circuit 18 matches the output 80 of the frequency divider 16.

При работы устройства в режиме измерения скорости (минутной подачи) счетчик 3, триггеры 9, 10 и 15 остаются в нулевом состоянии, при этом схемы 11, 12, 13, 17 и 18 совпадения ,в течение всего цикла измерения ока|зываются запертыми. Блок управления в этом случае через промежутки времени, отсчитываемые с помощью кварцевого генератора, равные времени индикации, выдает сдвинутые друг относительно друга импульсы TR3, TS2, TR2. При этом происходит обнуление блока 5 индикации, запись в него результатов измерения, произведенных счетчиком 4 за время индикации, и сброс счетчика 4 в нуль, после чего цикл измерений повторяется.When the device is operating in the speed measurement mode (minute feed), the counter 3, triggers 9, 10, and 15 remain in the zero state, while the coincidence circuits 11, 12, 13, 17, and 18 are locked during the entire measurement cycle. The control unit in this case, at time intervals counted by a crystal oscillator, equal to the indication time, produces pulses TR3, TS2, TR2 shifted relative to each other. In this case, the indication unit 5 is zeroed, the measurement results recorded by the counter 4 during the indication are recorded in it, and the counter 4 is reset to zero, after which the measurement cycle is repeated.

Таким образом, предлагаемое устройство цифрового измерителя позволяет при изменении эталонной скорости в широком диапазоне, ограничить время измерения в определенных пределах, обеспечивающих высокую точность измерения (порядка 0,1-0,15%) и требуемое быстродействие.Thus, the proposed device of the digital meter allows, when changing the reference speed in a wide range, to limit the measurement time within certain limits, providing high measurement accuracy (about 0.1-0.15%) and the required speed.

Claims

the input of the third coincidence circuit connected by the second input to the inverted output of the first trigger of the reference frequency measurement ranges and the second input of the eighth coincidence circuit. The third input of the third matching circuit is connected to the inverted output of the iHToporo trigger of the reference frequency measurement ranges and the first input of the eighth coincidence circuit; The fourth input of the third matching circuit is connected to the forward output of the account resolution trigger by the third input of the fourth matching circuit and the first input of the fifth matching circuit. The first input of the fourth coincidence circuit is connected to the forward output of the first trigger of the reference frequency measurement ranges and the first input of the sixth coincidence circuit. The second input of the fourth coincidence circuit is connected to the output of the pulse counter of the reference frequency. The second input of the fifth coincidence circuit is connected to the highest counter of the pulse of the reference frequency, and the third input of the fifth coincidence circuit is connected to the forward output of the second trigger of the reference frequency measurement ranges of the first input. bullet setting of the first trigger of the reference frequency measurement ranges and the first input of the seventh coincidence circuit. The outputs of the fourth and fifth coincidence circuit are connected respectively to the second and third inputs of the control unit, and the fourth input of the control unit is connected to the inverse output of the count resolution trigger and the fourth inputs of the first and second frequency analyzer matching circuits, first, second and third inputs which are connected to the bits of the pulse counter of the reference frequency, the first zero-setting input of which is connected to the single input of the counting enable trigger and the second output of the control unit. The second input of the zero setting of the pulse counter of the reference frequency is connected by the zero inputs of the flip-flops, the measuring range and the resolution of the counting, and the first output of the control unit. The unit inputs of the first and second triggers of the reference frequency measurement ranges are connected respectively to the outputs of the first and second coincidence circuits. The third output of the control unit is connected to the zero inputs of the pulse counter of the compared frequency and decadal divider, the counting input of which is connected to the sensor of the compared frequency and the third input The house is the same scheme. The first output of the decade divider is connected to the second input of the sixth coincident NIN circuit, and the second output of the decade divide divides to the second input of the seventh matching circuit. The outputs of the sixth, seventh and eighth circuits coincide with the first, second, third countable inputs of the counter counter compared frequencies. Fourth and fifth outputs of control circuits; and connected respectively to the inputs of the reset and the recording of the indication unit, also connected to the output of the pulse calculator of the compared frequency. FIG. 1 shows a functional diagram of the device; in fig. 2 is a diagram of the input and output signals of the control unit. The proposed device consists of sensors 1 and 2 pulses with frequencies proportional respectively to the reference and compared speeds, counters 3 and 4 pulses of the reference and compared speeds, the display unit 5, the frequency analyzer b assembled on the first and second coincidence circuits 7 and 8, first and second second triggers of 9 and 10 ranges of change of reference speed, and the number of matching cells in the frequency analyzer and trigger ranges by 1 is less than the number of ranges, the third, fourth and fifth circuits 11, 12 and 13 matches, the control unit 14 Eni, trigger 15 is resolved. counting, decadal frequency divider 16 and sixth, seventh and eighth circuits 1, 18 and 19 coincidence. The reference frequency sensor 1 is used in measuring the ratio of speeds, it is a pulse converter of the angle of rotation or linear movement into the number of pulses, the frequency of which is proportional to the speed of the leading (reference) working element, and the sensor 2 of the comparable speed pulses. A converter of angle of rotation or linear movement into the number of pulses combined with a working body, whose speed or relative speed to the speed of the reference working body varies, in particular, in the considered digital meter designed to measure minute or revolving feeds of the cutting machine; A spindle (face-plate) is received on the reference tool, relative to the speed of which the speed of the support movement is measured (the so-called reverse feed). In the mode of measuring the ratio of speeds (circulating feed), the device operates as follows. The measurement cycle includes a rough estimate of the rotational speed of the faceplate and, accordingly, the range selection made within 0.2 s using counter 3, frequency analyzer b, triggers 9, 10 and 15 and direct measurement of the relative feed rate. The measurement time is equal to the period of pulsing of pulses taken from the output of one of the cells 11, 12 or 13 co-fall, depending on the selected range. The operation of all the nodes of the device is synchronized with the pulses of the initial installation TR1, formed by the control unit 14. The period of the clock pulses is equal to the display time. In the initial state, the signals TR1., TR2, TR3, counters 3, 4 and 16 ,. the display unit 5 and the triggers 9, 10 and 15 are set to zero, with the left signal from the output of the three outputs 15 of the circuit 11, 12 and 13 coinciding locked the measurement cycle starts with the elimination of the resetting pulse TR1 to the zero of the counter 3, while for 0.2 s counts the pulses of sensor 1, thereby approximately determining the rotational speed of the faceplate, if the latter is within the first range of speeds, on the analyzer’s frequency, the signals are absent and the triggers 9 and 10 of the second ii of the third range remain in the initial state . In the case of inverse outputs of the flip-flops 9 and 10, single signals are received at the input of cs 11 and 19 coincidences that prepare these circuits for operation, and the circuits 12, 13, 17 and 18 coincidence are locked up until the end of the zero-measurement cycle. direct outputs of the flip-flops 9 and 10. When it arrives, after 0.2 s, at the single input of the trigger of the pulse counting TS1, it is set to one state, locking the zero signal of the inverse output of the circuit 7 and 8 of the frequency analyzer 6 and gives a single signal of its direct output to the input A matching circuit 11, allowing the pulses of sensor 1 to pass through it. When the first pulse of sensor 1 passes through circuit 11 to the first input of control unit 14, a reset pulse TR2 appears on its third output, embedding the indication counter 4, which starts counting pulses sensor 2 of the measured speed, arriving at its counting input through the coincidence circuit 19, for the period of the pulse frequency of the reference frequency. . When a pulse is received, the sensor 1 at the end of the indication time interval the control unit 14 forms the pulses TR3, TS2, TR2 that are shifted relative to each other. In this case, the measurement result recorded in the counter 4 is overwritten by the Impulse TS2 in the display unit 5. At the same time with the appearance of the zero pulse pulse TR.2 4, the control unit outputs a pulse TR1, at the end of which the entire meter circuit is in the initial state, and the measurement cycle is repeated. If the rotational speed of the faceplate during its coarse evaluation is within the second speed range, the output of the analyzer b circuit 7 is a single signal arriving at the input of the trigger 9 of the second range and setting it to one. In this case, circuits 12 and 17 are prepared for operation, and circuits 11, 13, 18, and 19 are locked up until the end of the measurement cycle. , When trigger 15 is transferred to the unit state, the matching circuits 12 and 17 are put into operation. In this case, through the circuit 12, the second input of the control unit 14 receives pulses from the output 8 of the counter 3, the KOTOFftJX tracking pulse is 10 times longer than the pulse period of the faceplate sensor 1, and the meter 4 of the display for the time equal to the period of the pulses at the second input of the control 14, counts the pulses coming from the output 8 of the frequency divider 16 through the circuit 17, the frequency of which is 10 times less than the frequency of the pulses of the sensor 2. Similarly, the circuit works when the faceplate speed is within the third range. In this case, at the output of the coincidence circuit 8 of the analyzer 6, the frequency nor is a single signal arriving at the input of the trigger 10 of the third di ") and setting it to the single state. The trigger 9 of the second range is then set to the zero state, and, therefore, the schemes 11, 12, 17 and 19 coincidence. until the end of the measurement cycle, they appear to be locked with zero signals, acting on their inputs from the direct output of trigger 9 and inverse output of trigger 10, and shekel 13 and 18 are prepared for operation. When the trigger resolution 15 is transferred to the single state, the frequency of sensor 1, divided by counter 3 into 100, is supplied from its output 80 g, through the coincidence circuit 13 to the third input of control unit 14, and the indicator 4 displays during the time equal to the pulse period at the third input The control unit 14 counts the ictusts, the frequency of the KOTOJ "X is 100 times less than the frequency of the pulses of the sensor 2 received by its synchronous input through the circuit 18 to coincide with the output 80 of the frequency divider 16. When the device is operating in the mode of measuring the speed (minute feed), the caterer 3, the triggers 9, 10, and 15 remain in the zero state, while the steps 11, 12, 13, 17, and 18 coincide during the entire measurement cycle are locked. In this case, the control unit at intervals of time, counted by a quartz oscillator, equal to the indication times, swells TR3, TS2, TR2 shifted relative to each other. In this case, the display unit 5 is reset to zero, the measurement results recorded by the counter 4 during the indication time are written to it, and the counter 4 is reset to zero, after which the measurement cycle is repeated. Thus, the proposed digital meter device allows, when changing the reference speed in a wide range, to limit the measurement time within certain limits, providing high measurement accuracy (on the order of 0.1-0.15%) and the required response speed. Claims of digital speed and velocity ratios, containing reference and compared frequency sensors, reference and compared frequency pulse counters and a display unit, characterized in that, in order to improve operation speed while maintaining a given measurement accuracy over the entire range of speeds, they are entered frequency analyzer, performed on the first and second coincidence circuits, first and second triggers. measurement ranges of the reference frequency are third, fourth, fifth, sixth, seventh and res Matching circuit block, control unit, counting trigger and decade divider, while the reference frequency sensor is connected to the counting input of the pulse counter of the reference frequency and is connected to the first input of the control unit via the first input of the third matching circuit connected to the inverse output of the first trigger the reference frequency measurement ranges and the second input of the eighth coincidence circuit; the third input of the third coincidence circuit is connected to the inverse output of the second trigger of the ranges measured reference frequency and the first input of the eighth coincidence circuit, the fourth input of the third coincidence circuit is connected to the forward output of the counting resolution trigger, the third input, the fourth coincidence circuit, and the first input of the fifth coincidence circuit, and the first input of the fourth coincidence circuit is connected by the output of the first measurement range trigger the reference frequency and the first input of the sixth circuit coincide, the second input of the fourth circuit with the falling is connected to the output of the pulse counter of the reference frequency, the second input of the same coincidence circuit is connected to the high-order bit the pulse counter of the reference frequency, the third input of the fifth coincidence circuit is connected to the direct output of the second trigger of the reference frequency measurement ranges by the first input of the zero setting of the first trigger of the reference frequency measurement ranges and the first frequency input of the seventh coincidence circuit, and the outputs of the fourth and fifth coincidence circuits are connected to the second and third inputs of the control unit, the fourth input of the control unit is connected to the inverse output of the counting trigger, and the fourth inputs of the first and second circuits coincide nor the frequency analyzer, the first, second and third inputs of which are connected to the bits of the pulse counter of the reference frequency, the first zero-setting input of which is connected to the single input of the counting resolution trigger and the output of the control unit, and the second zero-setting input of the pulse counter of the reference frequency is connected to zero inputs the triggers of the measurement ranges and the resolution of the account and the first output of the control unit, the single inputs of the first and second triggers of the measurement ranges of the reference frequency are connected respectively but with the outputs of the first and second coincidence circuits, and the third output of the control unit is connected to the zero inputs of the pulse counter of the compared frequency and the decade divider, the counter input of which is connected to the sensor of the compared frequency and the third input of the eighth coincidence circuit, the first ten-day divider is connected to the second input of the sixth match circuit, and the second output of the decade splitter is connected to the input of the seventh match circuit; the outputs of the sixth, seventh and eighth match circuits are connected respectively to the first , Second and third schetnmi inputs the comparison pulse counter frequency, wherein the fourth and fifth outputs of the control circuit are connected respectively to the inputs of the reset and writing of the indication unit, also connected to the comparison output of the pulse counter. Sources of information taken into account in the examination 1. USSR author's certificate number 386339, cl. G 01 P 3/54.

2. USSR Author's Certificate No. 512429, cl. G 01 P 3/54.

3. USSR author's certificate number 388229, cl. G 01 P 3/54.

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