SU947755A2

SU947755A2 - Sound reflection factor meter

Info

Publication number: SU947755A2
Application number: SU813232612A
Authority: SU
Inventors: Виктор Васильевич Тютекин; Алла Емельяновна Вовк; Сергей Петрович Климов
Original assignee: Предприятие П/Я А-1687
Priority date: 1981-01-07
Filing date: 1981-01-07
Publication date: 1982-07-30

Description

Изобретение относитс к неразрушак цему контролю ультразвуковым методом , а именно к измерител м Коэффициента отражени звука, и может быть использовано в ультразвуковых приборах и установках контрол ка .чества материалов и изделий.The invention relates to non-destructive testing by an ultrasonic method, namely, to an acoustic reflection meter, and can be used in ultrasonic devices and quality control systems for materials and products.

По основному авт. св. 443307 известен измеритель коэффициента отражени звука, содержащий акустическую .пинию, два звукоприемника, каналы выделени падающей и отраженной волн, блок регулировки уровн возбуждени излучател , первую и вторую фазосдвигающие цепи, фазометр, самописцы фазы и уровн , выход канала выделени падающей волны подк.гаочен к блоку излучател и через третью фазосдвигающую цепь - к первому входу фазометра, к выходу которого подключен самописец фазы, а выход канала выделени отраженной волны подключен к второму входу фазометра и самописцу уровн 1 .According to the main author. St. 443307, an audio reflectance meter is known that contains acoustic pines, two sound receivers, incident and reflected wave extraction channels, an emitter excitation level control unit, first and second phase-shifting circuits, a phase meter, phase recorders and level, the output of the incident wave extraction channel is connected to the receiver. to the radiator unit and through the third phase-shifting circuit to the first input of the phase meter, to the output of which the phase recorder is connected, and the output of the reflected-emission channel is connected to the second input of the phase meter and the recorder DMS 1.

Известный измеритель позвол ет измер ть коэффициент отражени звука, однако оно не имеет средств дл определени мощности звуковых волн, что необходимо при исследовании зависимости параметров материалов отThe known meter makes it possible to measure the reflection coefficient of sound, but it does not have the means to determine the power of sound waves, which is necessary when studying the dependence of material parameters on

интенсивности распростран нмцихс по ним звуковых волн.The intensity of propagation of sound waves on them.

Цель изобретени - обеспечение возможности измерени передаваемой по акустической линии мсицности звуковых волн.The purpose of the invention is to make it possible to measure the transmitted sound waves transmitted over an acoustic line.

Указанна цель достигаетс тем, что измеритель коэффициента отражени звука снабжен измерител ми энер10 гетических параметров падающей и отраженной волн, каждый из которых, включает последовательно соединенные квадратор, подключённый к выходу соответствующего канала выделени , This goal is achieved by the fact that the sound reflectance meter is equipped with energy meters of incident and reflected waves, each of which includes a series-connected quadrant connected to the output of the corresponding extraction channel,

15 и детектор а также последовательно соединенными блоком вычитани , входы которого подключены к выходам детекторов , и индикатором мощности.15 and the detector as well as serially connected by a subtractor, the inputs of which are connected to the outputs of the detectors, and a power indicator.

На чертеже представлена блок-схе20 ма измерител .The drawing shows a block diagram of the meter.

Измеритель коэффициента отражени звука содержит каналы выделени падающей и отраженной волны (не обозначены ) . Канал выделени падающей The sound reflectance meter includes channels for the selection of the incident and reflected waves (not indicated). Channel selection incident

Claims

25 includes a sound receiver 1, and a first phase-shifting circuit 2 and a differential amplifier 3 connected to its output. The reflection channel of a reflected wave includes a sound terminal 4, and a second phase-shifting circuit 5 and a differential amplifier 6 connected to its output. Second inputs of differential amplifiers 3 and 6 are connected respectively to the outputs of the phase-shifting circuits 5 and

2. To measure the phase difference between the incident and reflected waves, serve as a phase meter 7, to the inputs of which amplifier 6 is connected and through a third phase-shifting circuit 8 - amplifier 3 A level recorder 9 is connected to the output of the amplifier b, and a phase recorder 10 is connected to the output of the phase meter 7. Power meters (not indicated) are used to measure the power of the incident and reflected waves. The incident power meter includes successively connected quad 11 and detector 12, and the reflected wave power meter quad quad 13 and detector 14. The outputs of the detectors 12 and 14 are connected to the subtraction unit 15, to the output of which the power indicator 16 is connected. The adjustment unit 18 is used to adjust the excitation level of the radiator 17, and the output of the excitation generator 19 is connected to the KOTOpoio input. The control input of the adjustment unit 18 is connected to the output of the differential amplifier 3 of the incident wave channel. The meter works as follows. The signals of the excitation generator 19 through the buoy level adjustment unit 18 are fed to the input of the emitter 17. The incident and reflected signals enter the inputs of the sound receiver 1 of the incident wave channel and the sound receiver 4 channels of the reflected wave, respectively. From the output of the sound receiver 1, the signals arrive at the inputs of the first phase shifting circuit 2 and the differential amplifier 3 and then through the third phase-shifting circuit 8 to the first input of the phase meter 7. The second input of the phase meter 7 receives a signal from the output of the f. channel to highlight the reflected the waves passed by the sound receiver 4, the second phase-shifting circuit 5 and the differential amplifier 6. Phase meter 7 determines the phase-reflectance, the latter is recorded using the recorder 10, the signal level is recorded using the recorder 9, the input of which receives a signal whose value is proportional to the amplitude of the reflected the waves. To measure the energy parameters of the incident and reflected waves, signals from the outputs of the extraction channels are fed to the inputs of the quadrants 13 and 11 and through the detectors 14 and 12 to the input of the subtraction unit 15. From the output of block 15, a signal proportional to the power of the acoustic wave is fed to the input of the power indicator 16. The invention makes it possible to measure the sound power transmitted through the acoustic line, which makes it possible to more fully characterize the parameters of the material under study. Claims of the invention The reflectance meter for the AV. St. No. 443307, that is, in order to make it possible to measure the power of the sound waves transmitted through the acoustic line, it is equipped with measuring parameters of the incident and reflected waves, each of which includes a series-connected quadr connected to the output of the corresponding extraction channel, and a detector, and Tc1 are also serially connected by a subtraction unit, the inputs of which are connected to the outputs of the detectors and a power indicator. Sources of information taken into account in the examination 1. USSR author's certificate 443307, cl. G 01 N 29/04, 1974.