SU563626A1 - Terminal device of ultrasonic defectoscope - Google Patents
Terminal device of ultrasonic defectoscopeInfo
- Publication number
- SU563626A1 SU563626A1 SU7502139582A SU2139582A SU563626A1 SU 563626 A1 SU563626 A1 SU 563626A1 SU 7502139582 A SU7502139582 A SU 7502139582A SU 2139582 A SU2139582 A SU 2139582A SU 563626 A1 SU563626 A1 SU 563626A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- terminal device
- threshold circuit
- block
- ultrasonic defectoscope
- circuit
- Prior art date
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Description
Уровень напр жени , с которым сравниваетс амнлитуда видеоситнала с селектора 2 пороговой схеме 3, есть браковочный уровень сигнализатора дефектов (блока 5). При недостаточно высокой чувствительности пороговой схемы 3 малейшее изменение напр жени сравнени или амплитуды видеоимпульса может привести к срабатыванию пороговой схемы 3 и блока 5.The voltage level with which the video channel amnlitude from the selector 2 is compared to the threshold circuit 3 is the rejection level of the defect detector (block 5). If the sensitivity of the threshold circuit 3 is not sufficiently high, the slightest change in the reference voltage or the amplitude of the video pulse can lead to the triggering of the threshold circuit 3 and block 5.
Дл предотвращени попадани ложного импульса с пороговой схемы 3 на блок 5 между схемой 3 и блоком 5 устанавливаетс схема 4 совпадени , на один вход которой подаетс сигнал с пороговой схемы 3, а на второй - от формировател 1. При этом сигнал с пороговой схемы 3 на блок 5 попадает только при совпадении по времени импульса с блока 2 и формировател 1 (фиг. 2).To prevent a spurious pulse from the threshold circuit 3 to block 5 between circuit 3 and block 5, a circuit 4 is established, to one input of which a signal is fed from threshold circuit 3, and to the second from generator 1. At that, the signal from threshold circuit 3 to block 5 gets only when the pulse coincides with time from block 2 and shaper 1 (Fig. 2).
Сигнал от дефекта идет строго синхронно и всегда будет попадать в зону автоматического контрол . Сигнал от помехи - несинхронный и может возникнуть в любой момент времени.The signal from the defect is strictly synchronous and will always fall into the zone of automatic control. The signal from the disturbance is asynchronous and can occur at any time.
Веро тность прохода сигнала от помехи через схему 4 совпадений на блок 5 тем меньше , чем больше соотношение между периодом следовани синхроимпульсов и длительностью зоны автоматического контрол .The probability of the signal from interfering through the scheme 4 matches per block 5 is the smaller, the greater the ratio between the period of the clock and the duration of the automatic control zone.
Обычно это соотношение больше дес ти, поэтому установка схемы 4 между пороговой схемой 3 и блоком 5 резко повышает помехозашищенность оконечного устройства.Usually this ratio is more than ten, therefore installation of circuit 4 between threshold circuit 3 and block 5 sharply increases the noise immunity of the terminal device.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU7502139582A SU563626A1 (en) | 1975-05-30 | 1975-05-30 | Terminal device of ultrasonic defectoscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU7502139582A SU563626A1 (en) | 1975-05-30 | 1975-05-30 | Terminal device of ultrasonic defectoscope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU563626A1 true SU563626A1 (en) | 1977-06-30 |
Family
ID=20621143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU7502139582A SU563626A1 (en) | 1975-05-30 | 1975-05-30 | Terminal device of ultrasonic defectoscope |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU563626A1 (en) |
-
1975
- 1975-05-30 SU SU7502139582A patent/SU563626A1/en active
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