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Transducer relative sensitivity
| Глоссарий по ультразвуковому контролю и испытаниям |
Response of the transducer to a given source.16 transducer, resonant: transducer that uses the mechanical amplification due to a resonant frequency (or several close resonant frequencies) to give high sensitivity in a narrow band, typically ±10 percent of the principal resonant frequency at the –3 db points.16 transducer, single-ended: piezoelectric single-element transducer, the output pole of which is isolated from the case, the other pole being at the same potential as the case.16 transducer, wide band: transducer whose response to surface displacements is flat over a wide frequency range.
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Относительная чувствительность преобразователя, русский
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Transducer, английский
- A device that converts energy from one form to another, such as optical energy to electrical energy.
- Преобразователь, датчик, при?мник
- A device which converts power in one kind of system to power in another form, e.g., a loudspeaker which converts electric power to acoustic power.
- A device that converts one type of energy to another (e.g., water pressure to electricity, as in a speed recorder; or electrical to acoustic as in a loudspeaker).
- Первичный измерительный преобразователь, датчик
- A device that converts energy from one form to another, such as a microphone or speaker.
- An electrical device that converts a signal from one form of energy to another.
- Any device that is capable of converting energy from one form to another.
- (1) device that converts mechanical energy to electrical output or vice versa. (2) piezoelectric device that converts attributes of the stress-versus-strain field of an acoustic wave into an electrical signal of voltage versus time. sensor; probe. transducer, differential: piezoelectric twin-element or dual-pole transducer.
- Device by means of which energy can flow from one or more transmission systems or media to one or more other transmission systems or media; sensor or probe.4
- (1) device that converts mechanical energy to electrical output or vice versa. (2) piezoelectric device that converts attributes of the stress-strain field of an acoustic wave into an electrical signal of voltage versus time. sensor; probe.16 transducer, differential: piezoelectric twin-element or dual-pole transducer, the output poles of which are isolated from the case and are at a floating potential.16
Mechanical, английский
Amplification, английский
- N амплификация7
- Усиление
Sensitivity, английский
- Change in the response of a measuring instrument divided by the corresponding change in the stimulus (1)
- The ratio of the output of an instrument to the input (i.e. -gain).
- Defines the smallest signal detectable in the presence of systems noise
- In television, a factor expressing the incident illumination upon a specified scene required to produce a specified picture signal at the output terminals of a television camera.
- For a camera usually specified in lux to provide indication of light level required to gain a full video signal from the camera.
- A measure of the amount of light required to provide a standard video signal. sensitivity values are stated in lux (see lux) or foot-candles.
- Lens iris aperture required to provide a video output signal of standard level at a specified light input. in general, sensitivity is measured using an 89.9% reflectance grey scale chart illuminated by a 3200? k illuminance at 2000 lux (color camera) or 400 lux (b/w camera), for a video output level of 100%.
- 1. the fact of being able to detect and respond to an outside stimulus 2. the rate of positive responses in a test from persons with a specific disease. a high rate of sensitivity means a low rate of people being incorrectly classed as negative. compare specificity
- Чувствительность; сенситивность; восприимчивость специфически измененная реактивность. вероятность возникновения реакции на введение антигенов. ср. susceptibility (восприимчивость (к болезни)).
- The sensitivity of classification rule is a measure of its ability to correctly classify observations into a particular category. it is defined to be the ratio of the number of true positives to the number of positives in a test set. this value is usually inversely related to the specificity of the test for a given set of data and a particular classification rule. note that this measure is different from the positive predictive value of a rule, which is a measure of the probability that a positive is a true positive. if multiple classification categories exist, each category will have its own sensitivity, specificity, and positive predictive value. see also: positive predictive value, specificity.
- Чувствительность: a) различие в концентрации аналита, соответствующее наименьшему обнару-живаемому различию в реакции метода. представляется наклоном калибровоч-ной кривой. иногда ошибочно используется для обозначения предела обнаружения. b) частота истинно положительных результатов, полученных при испытании проб, в которых, насколько известно, содержится аналит [55]. c) отношение изменения показаний измерительного прибора к соответствую-щему изменению измеряемой величины. измеряемой величиной может быть, например, количество исследуемого вещества, содержащееся в пробе.
- Чувствительность. в сенсорном анализе — способность различать, идентифицировать и/или дифференцировать (качественно и/или количественно) один или более раздражителей с помощью органов чувств (предварительный стандарт мос, 12). в аналитической химии — чувствительность метода, которая (для простого-метода)- характеризуется наклоном калибровочной кривой, т. е. является дифференциалом измеряемой величины по отношению к концентрации dx/dc. чувствительность не следует путать с наименьшим количеством или наиболее низкой концентрацией, которые можно обнаружить с помощью данного метода; правильный термин для обозначения этого понятия — предел чувствительности (см. limit of detection).
- The output of a microphone in volts for a given input in sound pressure level. sensitivity can also mean the sound pressure level (spl) a loudspeaker produces at one meter when driven with one watt of pink noise.
- The degree of confidentiality of an e-mail message or calendar item, ranging from normal to confidential.
- The significance level that must be reached before a notification is sent.
- Чувствительность:
- Measure of a sensor’s ability to detect small signals. see resolution.
- Ability of a sensor or system to distinguish a signal or indication from background noise. see also probability of detection.
- Ability of a sensor or system to distinguish a signal or indication from background noise. see also probability of detection. si (international system of units): international measurement system in which the following seven
- (1) performance characteristic of a penetrant system, of a developer, or of an entire penetrant process that provides a relative measure of the ability to detect discontinuities. (2) enumerated level of performance of a penetrant system determined by applying standardized processing procedures on reference standards with known defects. (3) ability of a sensor or system to distinguish a signal or indication from background noise. compare probability of detection.
- Probability of detection.
- Ability of signal to change with small changes of measured quantity.
Piezoelectric, английский
Displacements, английский
Усилия, вызванные перемещениями; ~s due to flexure (внутренние) усилия, возникающие при изгибе [от изгиба]; ~ due to a mass массовая сила; ~ due to friction сила трения; ~ exerted against the wall сила, действующая на стену; ~s exerted by
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Transmission characteristics, английский
Test object characteristics that influence the passage of ultrasonic energy, including scattering, attenuation or surface conditions.7
Time base, английский
See sweep.
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