SU964263A1

SU964263A1 - Acoustic signal-to-electric one converter

Info

Publication number: SU964263A1
Application number: SU813260485A
Authority: SU
Inventors: Юрий Александрович Хащин; Николай Николаевич Рубаник; Юрий Борисович Рошаль
Original assignee: Севастопольский Приборостроительный Институт
Priority date: 1981-03-16
Filing date: 1981-03-16
Publication date: 1982-10-07

Description

Изобретение относится к устройствам автоматики,The invention relates to automation devices,

Известны преобразователи звукового сигнала в пневматический, содержащие резонатор и пневматический струйный узел формирования выходного сигнала[1]'.⁵ Known converters of an audio signal into a pneumatic one, containing a resonator and a pneumatic jet unit for generating an output signal [1] '. ⁵

Для формирования выходного электрического сигнала такой преобразователь должен быть дополнен пневмоэлектрическим преобразователем, что услож-_)оняет конструкцию всего устройства.To generate an output electrical signal such converter must be supplemented pneumoelectric converter that _complicates) nyaet structure _of the entire device.

Наиболее близким к предлагаемому является преобразователь, содержащий консольно закрепленный гибкий световод, против зажатого конца которого установлен источник света, а против свободного конца расположена маскаэкран с затемненным центральным участ-. ком, за которой установлен фотодатчик [21.' ₂₀ Closest to the proposed one is a converter containing a cantilevered flexible optical fiber, a light source is installed against the clamped end, and a mask screen with a darkened central part is located against the free end. com behind which the photosensor is installed [21. ' ₂₀

Известное устройство обладает недостаточной чувствительностью.The known device has a lack of sensitivity.

Целью изобретения является повышение чувствительности преобразователя.The aim of the invention is to increase the sensitivity of the Converter.

Указанная цель достигается тем,что в преобразователе, содержащем корпус, консольно закрепленный гибкий световод, против зажатого конца которого установлен источник света, а против свободного конца расположена маскаэкран с затемненным центральным участком, за которой установлен фотодатчик, установлен резонатор, в горловине которого размещен гибкий световод, закрепленный в корпусе и расположенный в осевом отверстии втулки, установленной с возможностью осевого перемещения.This goal is achieved by the fact that in the transducer containing the cantilever mounted flexible fiber, a light source is installed against the clamped end, and a mask screen with a darkened central section is located against the free end, a photo sensor is installed behind it, a resonator is installed in the neck of which a flexible fiber is placed fixed in the housing and located in the axial hole of the sleeve mounted with the possibility of axial movement.

На чертеже приведена схема преобразователя.The drawing shows a diagram of the Converter.

Преобразователь содержит корпус 1 , в котором выполнены горловина 2 и резонатор 3. В горловине 2 корпуса 1 преобразователя установлен в резьбовой втулке 4 гибкий световод 5, закрепленный в держателе 6. Против свободного конца световода 5 установлена маска-экран 7 с затемненным цент3 964263 ральным участком и фотодатчик 8. Кроме того, преобразователь снабжен источником 9 света и источником 10 звуковых колебаний.The converter comprises a housing 1, in which a neck 2 and a resonator 3 are made. In the neck 2 of the converter housing 1, a flexible optical fiber 5 is mounted in the threaded sleeve 4, fixed in the holder 6. A mask screen 7 with a darkened central section 3 964263 is installed against the free end of the optical fiber 5 and a photosensor 8. In addition, the converter is provided with a light source 9 and a sound vibration source 10.

В исходном положении (при отсутст- ₅вии звуковых колебаний) торец свободного конца световода 5 находится против затемненного участка маски 7, и световой поток от источника 9 света не поступает на фотодатчик 8, т. е. ю преобразователь в таком состоянии имеет нулевой выходной сигнал.In the initial position (in the absence of sound vibrations) _{5, the} end of the free end of the fiber 5 is opposite the darkened section of the mask 7, and the light flux from the light source 9 does not enter the photosensor 8, i.e., the converter in this state has a zero output signal .

Преобразователь работает следующим образом. .The converter operates as follows. .

При подаче звуковых колебаний от 15 источника 10 преобразователь благодаря наличию резонатора 3 будет выделять звуковой сигнал только определенной частоты и усиливать его. Колебания световода 5, расположенного в горло- ₂₀вине 2, будут максимальными, когда его собственная частота колебаний совпадет с частотой регистрируемых звуковых колебаний, в результате чего давление внутри резонатора резко воз- ₂₅растает и световод 5 в процессе колебаний передает световой поток от источника 9 света через прозрачный участок маски 7 на фотодатчик 8, который формирует выходной электрический сиг- _зднал.When applying sound vibrations from 15 of the source 10, the converter due to the presence of the resonator 3 will emit an audio signal of only a certain frequency and amplify it. Oscillations of the optical fiber 5 located in the neck _{20 of} wine 2 will be maximum when its natural frequency of oscillations coincides with the frequency of the recorded sound vibrations, as a result of which the pressure inside the resonator rises sharply ₂₅ and the optical fiber 5 transmits the light flux from the source 9 during the oscillations light through a transparent mask portion 7 on the photosensor 8, which produces an output electrical The signal _zd cash.

При завинчивании или откручивании резьбовой втулки 4 будет изменяться длина свободного участка световода 5, что позволит осуществить регулировку собственной частоты колебании световода 5.When screwing or unscrewing the threaded sleeve 4 will change the length of the free section of the fiber 5, which will allow you to adjust the natural frequency of the oscillation of the fiber 5.

Резонатор 3 может быть выполнен с переменным объемом (путем введения во внутреннюю его полость, например, поршня J, что позволяет сочетанием изменения объема резонатора 3 и изменения свободной длины световода 5 менять чувствительность и параметры преобразователя.The resonator 3 can be made with a variable volume (by introducing, for example, a piston J into its internal cavity, which allows a combination of changing the volume of the resonator 3 and changing the free length of the fiber 5 to change the sensitivity and parameters of the converter.

Выполнение таким образом преобразователя звуковых сигналов в электрические обеспечивает высокую чувствительность, надежность и небольшие габариты, так как диаметры волокон используемых световодов могут быть от 5 до 200 мкм.The implementation in this way of a sound signal to electric converter provides high sensitivity, reliability and small dimensions, since the fiber diameters of the used optical fibers can be from 5 to 200 microns.

Эффективность изобретения определяется улучшением характеристик систем автоматики, в которых используется предлагаемый преобразователь.The effectiveness of the invention is determined by improving the characteristics of automation systems in which the proposed converter is used.

Claims

(, 5t) ELECTRIC SOUND SIGNAL STOPPER The invention relates to automation devices. Audio-to-pneumatic signal transducers are known that contain a resonator and an pneumatic inkjet unit for generating an output signal. 13 em design of the entire device. Closest to the present invention is a transducer containing a cantilever flexible light tube, against which the clamped end is a light source, and a mask against the free end is a screen with a darkened central part, behind which is mounted the photocell C23. The known device has insufficient sensitivity. The aim of the invention is to increase the sensitivity of the converter. This goal is achieved by the fact that in a transducer containing a housing, a cantilever-mounted flexible light guide, against which clamped end a light source is installed, and against the free end there is a masked screen with a darkened central section: behind which a photosensor is installed, a resonator is installed, in the mouth of a flexible light guide is mounted in the housing and located in the axial bore of the sleeve installed with the possibility of axial movement. The drawing shows a diagram of the Converter. The converter includes a housing 1, in which the neck 2 and the resonator 3 are made. In the neck 2 of the converter housing 1, a flexible light guide 5 is mounted in the threaded hub k fixed to the holder 6. A mask-screen 7 with a darkened central section and a photo sensor are installed against the free end of the light guide S 8. In addition, the converter is equipped with a source of light 9 and a source of 10 sound vibrations. In the initial position (in the absence of sound vibrations) the end of the free end of the light guide 5 is against the darkened portion of the mask 7, and the light flux from the light source 9 does not flow to the photosensor 8, i.e. the converter in this state has a zero output signal. The Converter operates as follows. . When applying sound waves from source 10, the converter, due to the presence of resonator 3, will only emit a sound signal of a certain frequency and amplify it. Fluctuations of the light guide 5 located in the throat 2 will be maximum when its own oscillation frequency coincides with the frequency of recorded sound oscillations, as a result of which the pressure inside the resonator sharply increases and the light guide 5 transmits the light flux from the source 3 of the light through the transparent part mask 7 on the photo sensor 8, which forms the output electrical signal. When screwing or unscrewing the threaded sleeve k will change the length of the free part of the light guide 5, which will allow adjustment of the natural frequency of the light wave of the light guide 5. Resonator 3 can be made with a variable volume (by inserting into its internal cavity, for example, pores). The combination of a change in the volume of the cavity 3 and a change 96 in the free length of the light guide 5 changes the sensitivity and parameters of the converter. Performing in this way a converter of sound signals into electrical ones ensures high sensitivity, reliability and small dimensions, since the fiber diameters of the optical fibers used can be from 5 to 200 microns. The effectiveness of the invention is determined by the improvement of the characteristics of the automation systems in which the proposed converter is used. The invention of the audio signal into electric converter, comprising a housing, a cantilever-mounted flexible light guide, opposite to the clamped end of which a light source is installed, and opposite to the free end is a mask-screen with a darkened central section, behind which a photosensor is installed, characterized in sensitivity, a resonator is installed in it, in the throat of which a flexible light guide is mounted, fixed in the housing and located in the axial channel of the sleeve, installed with the possibility new axial movement. Sources of information taken into account in the examination 1.Dmitriev V.N., Gradetsky V.G. Fundamentals of pneumatic automation. M., Mechanical Engineering, 1973, p. 336, fig. 192.

2. Sattarov DK Fiber Optics. L., Mechanical Engineering, 1973, p. 233-236, fig. 112 (prototype) ..