SU557260A1 - Angle sensor - Google Patents

Description

(54) TURNING ANGLE SENSOR

one

The invention relates to instrumentation engineering, in particular to devices for automatic control and monitoring, and may find application in automated devices for monitoring and controlling production processes.

A rotation angle sensor is known that contains a light source, a rotation angle transducer into a light signal made in the form of a light guide with profiled ends or a reflector shaped in the form of a conoid, a photodetector and a signal processing unit from it 1.

However, this sensor has a complex structure.

The closest to the technical essence of the invention is a rotation angle sensor comprising a successively located light source, a rotation angle converter into a light signal made in the form of a translucent cylinder with a spiral cut, a photo cell and a signal processing unit c.

The disadvantage of the known sensor is the complexity of the technology of manufacturing a translucent spiral-cut cylinder and insufficient sensor functionality, which means that if the angle-of-rotation converter into a light signal has an uneven spiral medium, due to the uneven deviation of the rays coming out of it, the photocell reacts as a change in intensity luminous flux, as well as irregularly deflected rays, which result in false signals. In this connection, there are certain difficulties in using it as a functional converter.

The purpose of the invention is to simplify the design and expand the functionality of the sensor by the fact that two profiled masks are applied on the surface of the cylinder, one of which is reflective and the other is absorbing.

The drawing shows the proposed sensor, a general view.

Claims (2)

The sensor contains a successive light source 1, a translucent cylinder 2, on the surface of which profiled masks are applied: reflecting 3 and absorbing 4, lens system 5, photocell 6, which is connected to the input of signal processing unit 7. The sensor works as follows. A diverging beam (stream) of light from a light source falls on the end of a translucent cylinder. When rays pass through a cylinder, due to the presence of profiled masks deposited on the surface of the cylinder, one part of them is reflected and passes through the cylinder, while the other part is absorbed. Since the masks are made profiled, the light flux leaving the cylinder will be unevenly distributed in the section, i.e. its density will be different. This luminous flux passes through the lens system creating parallel rays and falls on the photocell. The photocell is installed so that when the semi-transmissive cylinder rotates around its axis, it is illuminated unevenly. In this case, rotation of the cylinder around its axis causes a change in the resistance of the photocell to, respectively, from the processing unit 7, a signal is received, which is the coordinate of the angular sweep. The waveform depends on the density of the light distribution in the cross section of the output end of the cylinder and on the mask profile. Thus, the proposed sensor can be used as a functional angle converters. Claims Angle sensor containing sequentially located light source, angle converter into light signal made in the form of a translucent cylinder, photocell and signal processing unit with it, characterized in that, in order to simplify the design and extend the functionality of the sensor, on the surface the cylinder has two profiled masks, one of which is reflective, and the other is absorbing. Sources of information that you take into account during the examination: 1. Copyright certificate No. 387388, class G 06 Q-9/00, - 1072. 2. Copyright certificate № 332328 cl. G 01 D 5/26, 1970.