DD200965A1 - SPEED MEASUREMENT INFORMATION SYSTEM WITH DIRECT INPUT - Google Patents

Abstract

The invention relates to an optoelectronic measurement information system which records measured values of non-electrical quantities from the periphery of technological processes. The inventive solution is used to detect the rotational speed of an electric motor, wherein the signal transmission via fiber optic cable takes place. The aim of the invention is to obtain information about the speed of an electric motor directly with little circuit complexity without "on-site electronics". According to the invention, measurement information is formed by a light source and a coding disc and detected directly by a scanning head. The forwarding of the measurement information is done optically via a light guide. The optical measurement information is transmitted without repeater structure over a transmission distance of about 1000 m and forwarded directly to the reception amplifier. Thereafter, the signals arrive via a transmitter for the standard signals to an evaluation unit. The processed measurement information can be arbitrarily provided in TTL form of a computational structure.

Description

Speed information system with direct optical input

The invention relates to an optoelectronic Hessinformationssystem that detects the periphery of technological processes, measurements of non-electrical variables, the solution of the invention is used to detect the rotational speed of an electric motor, wherein the signal transmission via optical fiber takes place »

Characteristic of the known technical solutions It is known (DS-OS 21 03 792) to Pestposition the angular deviation of two electric motors to use a photoelectric detector device, 'being arranged on the shaft, an electric motor perforated discs. The determination of the angular deviation is made by a photocell, which is connected to the shaft of the first electric motor and a light source _} which is connected to the shaft of the second electric motor. Furthermore, it is known (DE-OS 23 24 600) for regulating the speed of an electric motor on the shaft of the electric motor to arrange a disc which is provided with densely arranged line marks, with respect to this disc, a second disc is mounted, which has only one breakthrough » From a light source, the light falls through the line marks and is detected by a photocell.

whereby a signal voltage is generated, disadvantageous in these arrangements is that the transmission of the obtained measurement information from the rotor to the evaluation unit is carried out by electrical means, which can lead to disturbances in the presence of strong electric fields or aggressive media.

goal of

'The aim of the invention is to capture with little circuit complexity without "on-site electronics" information about the speed of an electric motor directly;

Reading of the nature of the invention;

The invention has for its object to develop a Drehzahlnießin ™ forniationssystem with direct optical input au, according to the invention the object is achieved in that relative to the light source after the encoder a scanning head is arranged on the Aussans is a Lichtleitersteck "device is ₅ of a first Downstream of the optical waveguide is a second optical waveguide connector, whereby after the second optical waveguide connector a receiver amplifier which has an optical waveguide connector is arranged. The transmitter is followed by a transmitter whose output is connected to an evaluation unit »

Execution game

The invention will be explained in more detail in the following embodiment »

The enclosed drawing shows:

1: Drehsahlmeßinforinationssystem with direct optical input,

The LIeßinfoi'inationen for the measurement of speeds and V / inkeln be by a light source 1 and a coding 2

- 3 -

formed with a radial grating pitch and received by a scanning head 3. The scanning head 3 has spatially deliberately arranged optical fiber connections which are connected to a light guide 6 via a flexible conductor plug-in device 4 «

The obtained measurement information v / earth on a direct optical path to a receiving amplifier 9 supplied whereby the Meßwertübertragung by intensive electromagnetic fields bay /, aggressive media remains unaffected and thus, a fail-safe transmission is ensured. The optical information is transmitted without repeater structure over a transmission distance of about 1000 m and fed directly to the reception amplifier 9. Thereafter, the signals arrive via a transmitter 10 for the unit signals to an evaluation unit 11 * The Hessinformationen processed can be arbitrarily provided in TTL form a computational structure available, thereby the Drehzahlmeßinformationssystem effectively completed or »by a suitably constructive designed technical group as a Feedback-Completed Unit Equipped »

Claims (1)

ä. Invention claim. 1, Drehzahlmeßinformationssystem with direct optical input, wherein the transmitter consists of a light source and coupled to the LIotorwelle encoder, characterized in that opposite the light source (1) and after the encoder (2) a scanning head (3) is arranged on whose output is a light guide plug device (4), which is a first optical fiber connector (5) connected to the light guide (6) and at the end of the light guide (6) a sv / eiter optical fiber connector (7) is connected, wherein after the second Fiber optic connector (7) a receiving amplifier (9) which has a light guide plug device (S), arranged and the Smpfangsverstärker (9) downstream of a transmitter (10) whose output is connected to an evaluation unit (11), For this 1 string drawings