SE413344B - OPTICAL METDON - Google Patents

Description

10 15 -20 25 30 das 1803086-5 the sum was used to stabilize it from the LED emit the light while the difference is the measuring signal of the measuring device.

The subject matter of the present additional patent consists of a modification sv it As described in the known measuring device, the present invention comprises man:: vs anar, sem s: mömngs 1 relationship: in maximus. m Iam-mama the fiber is arranged in one part and the light-emitting fibers in the other. ïad which otherwise characterizes the invention appear from the patent claims.

In On. the attached drawing shows the figure belonging to the measuring probe: electrical. the equipment and (le-optical. fiber belt. Fig. 2 shows a core arranged on. a transparent disc between transmitting and received fibers. Fig. 5 shows a screen arranged on the light-initiating fiber then. this has a larger area. than the light emitting or receiving the fibers. ' In Fig. 1, the light-initiating or transmitting fiber bait 1 and the light-emitting conductive or receiving fibers designated 2 and 3. Em LED 4, alternatively ' semiconductor layers, a transmitting light is arranged in the fiber 1 and the intensity of the emitted light is controlled by a control device 7. It through the receiving fibers. 2 resp The incoming light flux falls on photodiode nays 5 and 6, respectively, be photocurrents reinforced: L electronics units 8 and 9 respectively. Those from these. units received sig- lerna. applied two. summing means 10 and 11, respectively, which form the sun and the difference, respectively of the two. the signals., The signal from the device 10 is applied to the control device 7, which control LED 4, then. that a constant beam light flux is obtained to the photodiodes 5 an. 6. skmmaassigmsism: man smemimgmaemet 11 maxar »m instrument 12, which can be: mammas or seglen-emma snar ma. perform: pa met appropriate way. i ' såalvm mamaemsm Comprises two parts, which 1 rig 1 are denoted by zo gon 25.

The transmitting fiber 1 is attached to the part 20 and the "two receiving fibers" 2 and ä are attached. : L part 25. How the attachment is made in detail is' described know in the main patent and are therefore overlooked here. Further assume here, a part 20 is movable relative to the part 25. _ Fig. 2 shows: end ends of the fibers. A transparent disc 17 is arranged so. to sound set from the fiber 1 emerges through a horizontal field 19. 'The stroked surfaces 18 are shielding portions of the transparent. the disc. The fiber is mobile in horizontal sonten lea, se sem ambbupiiem 16 utvisar. if them samasmee fi um 1 moves dt gains in the figure, the luminous flux enters the receiving fiber 2 a decrease. at the same time as the light flux into the fiber 5 increases. The sum of the blues. received light the flows. remains constant, while the 'difference between them increases. The result is one reduction of the output signal from the summing device 11. u

Claims (5)

Fig. 3 shows a measuring device in which the transmitting fiber 1 has a diameter which is substantially twice as large. big as they are. the diameter of the receiving fibers 2 and 5. The end surface of the transmitting fiber is largely shielded, which is marked by the line. Only two vertical fields 13 are light transmissive, so that light can fall into the two receiving fibers. In this embodiment of the measuring device, the fiber 1 is movable in vertical direction, which is marked with the double arrow 20. When the end fiber is caused to move upward by an external force, the luminous flux entering the receiving fiber 2 decreases, while the luminous flux entering the left fiber 3 increases correspondingly. 'K They showed so-called partly on. fiber end, partly on. a separate disc is to be considered only as an example of how an external force or movement can control the luminous flux from the transmitting fiber into the receiving fibers. Further embodiments are conceivable. _ PATENTKIAV An optical measuring device according to claim 1 of patent 7713207-4 for use in measuring physical quantities such as position, acceleration, force, pressure, flow rate, temperature, etc., and comprising an integral part (20) and a second part (25) and light-initiating and light-emitting fibers (1, 2, 5), in addition to the fact that the light-initiating fibers (1) are arranged in the first part and the light-conducting fibers (2, S) are arranged in the measuring device. second part. 2 ". nataon according to: patenzmm, 1, k e n n e t a c k n aa sei-av, that: inataonefs both parts with light-conducting fibers are so arranged that at least some of the light from aan ljuasnleaanaa fiber-n (1) can men; directly 1 ae 'light fl aamae rib- 1381738. 5. Measuring device according to claim 1, characterized in that a screen (15, 17) is arranged in the radiation path between the light-initiating and the light-emitting fibers: end surfaces. Measuring device according to Claims 1 and 5, characterized in that the screen (15) is attached to the part of the measuring device which contains the light-initiating fiber. Measuring device according to Claim 5, characterized in that the screen is formed by grinding and stoning the end surface of the light-initiating fiber. PUBLICATIONS REFERRED TO: Sweden 355 080 (G01R 21/06) GERMANY 2 345 498 (G01D 5/58), 2 509 112 (6028, 5/16), 2 733 281 (G02B 5/14) '-