| 词汇 | photocell |
| 释义 | photocell noun[ C ] uk /ˈfəʊ.təʊ.sel/ us /ˈfoʊ.t̬oʊ.sel/(alsophotoelectric cell) an electrical device that produces a current or a voltage when light shines on it: 光电管，电眼 Photocells are used in burglar alarms.光电管被应用于防盗警报器中。 Electrical components & circuitry accumulator AGM battery anode armature bandpass filter baseband chip cathode ray circuit breaker coil conductor LED display multicelled multiconductor negative pole number pad OLED photoresist photovoltaic cell relay transformer Examples of photocellphotocell After all transients died out, the steady induced angular velocity of the interior was picked up by the photocell and recorded. A photocell's response to the light stimuli is shown below each set of traces. A photocell's response to the light pulse is shown below each set of traces. A photocell's response to the flash is shown below each set of traces. A photocell sandwiches part of the disk and records its angular velocity. In the projector the film is transported in such a way that the soundtrack passes between a light beam and a photocell. When the disc is rotated, each ring varies the way in which a light beam affects a photocell. The drawn waveforms pass over photocells, illuminated from above by a steady stream of light, to the right of the flat surface. The evolutionary reason for this peculiar design appears to be a historical accident in which the earliest photocells randomly oriented in this "backwards" fashion. Each time one of the cylinder slats passed the light path a reflexion occurred which was recorded by the photocell. This is because the wiring from each photocell leaves the cell from the side that is nearest the light such that the wiring interferes with the path of light. An example would be to turn on the parking lot lights when a photocell indicates it is dark outside. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A strobe light, photocell, and oscilloscope were positioned at one end of the corridor, and a mirror at the other. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A small hole in the cylinder allowed the photocell to scan an image on a brightly illuminated glass slide. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Photocells were used to turn on and off the sound sources. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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