SU892326A1

SU892326A1 - Frequency pickup with discrete output

Info

Publication number: SU892326A1
Application number: SU782623111A
Authority: SU
Inventors: Федор Федорович Колпаков; Евгений Алексеевич Милькевич; Алексей Егорович Сычев; Олег Владимирович Знаменский; Валентина Митрофановна Читова; Владимир Алексеевич Шевелев
Original assignee: Харьковский авиационный институт
Priority date: 1978-06-01
Filing date: 1978-06-01
Publication date: 1981-12-23

Description

II

Изобретение относитс к технике измерени различных физических величин .The invention relates to a technique for measuring various physical quantities.

Известно устройство, сойержащее два генератора, св занные йРут с другом дл получени одновременно двух частот D 1.It is known a device that combines two generators associated with each other to obtain simultaneously two frequencies D 1.

Однако устройство имеет недостаточно широкий динамический диапазон характеристики преобразовани .However, the device does not have a wide enough dynamic range of the conversion characteristic.

Известен частотный датчик с дискретным выходом, предназначенный д-п измерени различных физических величин и содержащий два автогенератора с некратными частотами 12}.A frequency sensor with a discrete output is known, designed for measuring various physical quantities by dp and containing two oscillators with non-multiple frequencies 12}.

Однако дл устройства характерен недостаточно широкий динамический диапазон характеристики преобразовани .However, the device does not have a sufficiently wide dynamic range of the conversion characteristic.

Цель изобретени - расширение динамического диапазона характеристики преобразовани датчика.The purpose of the invention is to expand the dynamic range of the transform characteristic of the sensor.

Поставленна цель достигаетс тем, что в частотном датчике с дис .кретным выходом, содержащем первый и второй автогенераторы с некратными частотами, выход каждого из которых соединен со входом другого через соответствующий элемент задержки, а между вторым выходом первого автогенератора и вторым входом второго автогенератора включены «последовательно соединенные фильтр нижних частот и формирователь коротких импульсов, The goal is achieved by the fact that in a frequency sensor with a discrete output containing the first and second oscillators with non-multiple frequencies, the output of each of which is connected to the input of the other via the corresponding delay element, and between the second output of the first oscillator and the second input of the second oscillator series-connected low-pass filter and shaper of short pulses,

10 в него введень последовательно соединенные амплитудный детектор и триггер со счетным входом, включенные между выходом фильтра нижних частот и управл ющим входом - второго автогенеfS ратора..10, introducing a series-connected amplitude detector and a trigger with a counting input, connected between the output of the low-pass filter and the control input — the second autogenerator of the rator.

На чертеже представлена функциональна схема частотного датчика с дискретным выходом.The drawing shows a functional diagram of a frequency sensor with a discrete output.

Claims

The device contains two autogenous generators 1 and 2 with non-multiple frequencies, the output of each of which is connected to the input of the other through delay elements Zi, respectively. Between the second output of one of the oscillators and the second input of the other oscillator, serially connected low-pass filter 5 and shaper 6 short pulses are connected, and between the output of low-pass filter 5 and the control input of one of the autogenerators, for example, the second, connected in series amplitude detector 7 and trigger 8 with counting input. The device works as follows. When an information signal is applied to one of the autogenerators, for example 1, the frequency signal (x) - will be generated at the output of the latter, with the eigenfrequency uJ unchanged (J of the other autogenerator. In this case, there is a relation For stable generation of two radio pulse sequences 1 where integers. When the information signal changes, the value of the frequency w changes. If the ratio is fulfilled, the signal selected by the low-pass filter 5 with a frequency equal to the frequency of the radio pulse It is rectified by the amplitude detector 7 and fed to the trigger input with counting input 8 as a steady displacement. When the ratio is violated, the dual frequency radio pulse pemiM is broken, the signal from the output of the filter S disappears, the offset at the trigger trigger 8 undergoes a negative jump, and the trigger 8 This, in turn, leads to an abrupt change in potential at the output of the trigger 8 and, respectively, at the control input of the auto-oscillator 2. The natural frequency of oscillations of the latter and; The unit is replayed and the device reverts to the generation mode of a two frequency radio pulse sequence. The appearance of the signal at the output of the low-pass filter 5 and the positive offset of the trigger at the trigger input with the counting input 8 associated with it does not lead to the latter reversing, since it reacts only to negative differences of the input bias. Thus, in the proposed device, a significant expansion of the dynamic range of the transducer characteristic is provided. The Invention Frequency sensor with a discrete output, containing the first and second oscillators with non-multiple frequencies, the output of each of which is connected to the input of the other through a corresponding delay element, and in series between the second output of the first auto-oscillator and the second input of the second auto-generator pulses, which is also distinguished by the fact that, in order to broaden the dynamic range of the transducer characteristic, & It is connected in series with an amplitude detector and a trigger with a counting input, connected between the output of the low-pass filter and the control input of the second oscillator. Sources of information taken into account in the examination 1. Scheme of two generators for obtaining two frequencies simultaneously. Electronic Engineering, Nov. 1972, p. 78.

2. Kolpakov F., Milkevich E. Investigations of ring radio pulse generators with delay lines. Sb. Aircraft control systems, edition 3, Kharkov, 1977. .105-110.

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