Linear light modulation switching mechanism of television measurement system of large-caliber equipment

Abstract

The invention relates to a linear light modulation switching mechanism of a television measurement system of a large-caliber equipment. An optical filer support and an attenuation slice support of the mechanism are respectively fixed on platforms of two linear switching mechanisms. A first guide rail of the switching mechanism penetrates a platform by a through hole of the platform; a second guide rail is embedded into a groove; and two ends of the first guide rail and two ends of the second guide rail are respectively and fixedly connected with a first vertical plate and a second vertical plate. One end of a screw rod is movably connected with the first vertical plate and the other end of the screw rod passes through a through hole on the second vertical plate and is cooperated with the through hole. A motor is fixed on a third vertical plate of a pedestal and a rotating shaft penetrates the third vertical plate and is fixedly connected with the screw rod. And a nut is threadedly connected with the screw rod and is connected with the platform by a key; and a first spring and a second spring are sleevedly installed on the screw rod and are respectively at two sides of the nut. According to the invention, the provided mechanism has advantages of simple structure, accurate localization, high light modulation precision, low transmission noise, and dimensions of the appearance and the height are small; and moreover, air space between an optical filer and an attenuation slice is small.

Description

technical field [0001] The invention belongs to the technical field of photoelectric observation equipment, and relates to a linear dimming switching mechanism of a large-diameter equipment TV measurement system. Background technique [0002] Among photoelectric observation equipment, equipment with a caliber of 1 meter is large in size and heavy in weight, and is a large-scale equipment. In order to ensure its working accuracy, the moment of inertia of the rotary part should be reduced as much as possible, that is, the quality and radius of rotation of the rotary part should be reduced. At present, the tracking frame of the 1-meter-level caliber equipment is in the form of a horizon type, which is composed of a pitch axis and an azimuth axis. The TV measurement system is located on the top of the pitch axis cross, and its shape height determines the radius of rotation of the pitch axis. Therefore, in order to reduce the moment of inertia of the pitch axis (reduce the radi...

AI Technical Summary

Problems solved by technology

According to the optical data, if the dimming mechanism is designed according to the usual disc-rotating switching form, the wheel disc must be at least φ200mm, and the corresponding gear transmission group will make the disc-rotating switching mechanism too large

It is necessary to install two sets of relative motion rotary disc switching mechanisms in the axial direction. Not only can it not meet the optical design requirements of an axial air gap of 3.9mm between the filter and the attenuator, but also the height and dimension of the TV measurement system are too large to meet the requirements of large Requirements of Caliber Equipment for Miniaturization Design of TV Measurement System

In addition, the structure of this dimming mechanism is complex, through multi-stage gear transmission, the gear gap is large, the positioning is unstable during the working process, the precision is low, and the gear transmission noise is large

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