SU147109A1 - Device for remote transmission of shaft rotation angle - Google Patents

Description

In the famous auth. St. The device no. 122511 for remotely transmitting the angle of rotation of the shaft based on a photoelectric measurement method uses two annular photocells and three rasters with radial gaps located between the light sources and the photoelectric cells. Due to the difficulties in selecting two photocells with identical parameters, the known device has low measurement accuracy and poor data stability.

In the proposed device, one photocell is applied, perceiving two light fluxes, one of which passes through fixed and rotating rasters with the same number of slits; another flow passes through the rotating rasters, which are also connected to the measured shaft, with the same number of slots that are different from the first pair of rasters. This difference has significantly increased the stability of the measurements.

To improve the design of the device, all the rasters made on the forming cylindrical surfaces can be illuminated from the outside, and the photocell that perceives the light is located in the center. To reduce the requirements for the accuracy of the fabrication of rasters, an annular illuminator and a system of light guides can be used that ensure the operation of all rasters.

The drawing shows the proposed device.

On the shaft I, the angle of rotation of which is measured, is fixed a raster 2, made on a cylindrical surface, and a cone reflecting light rays. In the case 4 of the device, the stator 5 of the modulating motor is mounted, mounted into the sleeve 6, on which the cylindrical raster 7 is mounted. modulating motor rotates # 147109-2 with ball bearings 9 to 10 together with modular, it raster 1J, on which there are two pairs of slots, one opposite the slots of raster 2, and the other - opposite the slots of the raster 7. The number of slots on the raster 2 and in the upper ra raster 11 is the same oh, but different from the number of slots of the raster 7 and the lower p of the raster raster //.

Light from the light source 12, reflected by a conical reflector 13, is directed to rasters 2, 7 and 11, where it is modulated by a different frequency due to a different number of slots in the rasters and depending on the speed of rotation of the rotor 8. Two modulated with a different frequency of light flux, reflected from the cone 3 and the rotor mirror surfaces, fall on the photocell 14 located in the center of the device. Signals from the photocell are fed to the amplifier and then to filters, where signals with different frequencies are selected, which measure the angle and controlled shaft.

The proposed device can find wide applications in various systems for automating production processes.

Subject invention

Claims (3)

1. Device for remote transmission of the angle of rotation of the shaft, based on the photoelectric measurement method, according to the author. St. No. 122511, characterized in that, in order to increase the stability of the measurements, it uses one photocell that perceives two light fluxes, one of which passes through the fixed and rotating rasters with the same number of slots, and the other flow through the measured shaft and rotating rasters are also with the same number of slots, but different from the first pair of rasters. 2. A device according to claim 1, characterized in that, in order to improve the design, all rasters made on the forming cylindrical surfaces are illuminated from the outside, and the light-receiving photocell is located in the center. 3. The device according to paragraphs. 1 and 2, characterized in that, in order to reduce the requirements for the accuracy of the fabrication of rasters, an annular illuminator and a system of light guides are used, ensuring simultaneous operation of all rasters.