Gaisma osciloskops Struktūra un Princips
Light oscilloscope (lightbeamoscillograph): the measured parameters can be current or voltage and other electrical quantities, or has been transformed into a variety of electrical non-electrical quantities, such as in mechanical engineering and strain gauges used in conjunction with the measurement of stress, strain, torque and vibration, etc.. Light oscilloscope with light beam recording, light beam without inertia, light recording without friction, and can be used to increase the length of the optical arm of the method to improve the optical amplification. Compared with other recorders, light oscilloscope operating frequency is higher, up to 10,000 Hz, while the general pen recorder is not more than 100 Hz, jet recorder is not more than 1,000 Hz. It also has a higher current sensitivity, lower recording error and instrument light, small and other advantages, especially suitable for simultaneous recording of several or dozens of different parameters of the multi-wire oscilloscope, but the waveform can only be revealed after a certain degree of processing, and the use of the recording paper is more expensive.
The first light oscilloscope appeared in the early 20th century. 1960s, the use of ultraviolet direct recording paper, greatly simplifying the process of waveform display processing, so that the operation of the oscilloscope is more convenient and reliable.
Struktūra un princips
An oscilloscope consists of a measurement part and a recording part. The measurement part is mainly composed of magnetoelectric system oscillator (see current detector) and optical system. In the coil, Zhang wire composed of the vibrator's movable part is equipped with a reflector, by the light source (incandescent lamp or high-pressure mercury lamp) issued by the light beam reflected by the mirror, by the optical system in the light-sensitive recording paper to form the image point. When the coil in the current through the coil and reflector to Zhang wire as the axis of the deflection, so that the point of light in the light-sensitive paper for transverse linear motion. The offset and rate of movement of the spot is related to the input current and its rate of change. The photographic paper is driven by the paper-walking mechanism and moves longitudinally at a constant speed, reflecting the amount of time change. The curve recorded on the photographic paper is the input current over time, recorded as a function of the form of y=f (t). The oscillator is generally made very small, a light oscilloscope can be installed more than one (up to 60) oscillators. With the help of electrical or mechanical methods to adjust the position of each point of light, can achieve a number of variables recorded at the same time, can also be achieved cross-recording.
