JPS60158744A - Signal transmitter - Google Patents

Abstract

PURPOSE:To secure the stability between a rotor and a stator and to transmit signals continuously by transmitting signals by means of an intermediate of optical signals. CONSTITUTION:A shaft 7A is supported by a bearing 7 of a signal transmitter, and plural intermediate media 1 of optical signals are buried concentrically into an end face part of a rotor 3 which is revolved round the shaft 7A. The terminals of optical fiber cables 4A which are connected to each other are stored to a connection terminal store part 4 at the side of the rotor 3. While the photodetecting elements 2 of a stator 6 are set at the position opposite to the media 1 with no contact by securing a prescribed space to these media 1 respectively. At the same time, the terminals of fiber cables 5A connected to elements 2 are stored to a connection terminal store part 5 of the stator 6. Then signals are transmitted continuously by the media 1 with stability secured between the rotor 3 and the stator 6.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a signal transmission device that continuously electrically connects a rotating body and a fixed body.

In general, there is a slip ring device as a device for continuous electrical connection between a fixed body and a rotating body. It is used for transmitting and receiving signals from the ground station on the body side.

This slip ring device continuously transmits electrical signals by sliding the brush on the fixed body side to the slip ring on the rotating body side, and the sliding surface on the rotating body side is a smooth curved surface along the outer diameter. There is.

However, this conventional slip ring device, in which a brush is brought into sliding contact with a copper slip ring, is susceptible to pulse signal loss due to poor contact, and malfunctions are likely to occur due to the adhesion of abrasion powder due to the sliding. This method has the drawback that momentary interruptions occur in the transmission line, which impairs the normal operation of the equipment and requires maintenance after each predetermined period of operation.

For example, when trying to automate mobile equipment such as stack reclaimers, cranes, trippers, etc. in steel plants, or when trying to obtain equipment diagnosis information for rotating bodies, it is necessary to transmit many signals between rotating bodies and fixed bodies. However, the above-mentioned drawbacks were noticeable in the signal transmission line under weak voltage during automatic operation.

Particularly recently, digital high-speed pulse signals are being used more often than analog No. 48, but slip ring devices are not suitable for transmitting digital pulse signals.

The present invention was proposed to eliminate the above-mentioned drawbacks, and an object of the present invention is to provide a signal transmission device that can stably and continuously transmit signals between a fixed body and a rotating body. .

The gist of the present invention is to form a ring-shaped optical signal intermediate medium made of optical fibers or the like that scatters light and place it on a disk or cylinder on the rotating body side, and convert a pulse-like electrical signal into a blinking light signal. , the light enters the light input part of this intermediate medium, the light exits from the light output part, and is received and detected by a light receiving element, thereby transmitting a signal between the fixed body and the rotating body.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, and one end surface of a cylindrical rotating body 3 that rotates around a shaft 7A supported by a bearing 7 has concentric circles as shown in FIG. A plurality of intermediate media 1.1 for optical signals are embedded. Intermediate medium 1.1
For example, it contains particles that diffusely reflect light,
A transparent optical fiber is used that emits light by allowing light to enter through the light entrance portion of the end face.

The connection terminal housing portion 4 on the side of the rotating body 3 contains an intermediate medium l.

Fiber cables 4A each connected to 1...

It accommodates terminals of 4A... Next, as shown in FIG. 3, the light receiving elements 2°2...
For example, a phototube is used and is arranged at a position corresponding to the intermediate medium 1.1 . . . without contacting the intermediate medium 1 . 1 . . . with a required gap therebetween. The connection terminal storage section 5 of the fixed body 6 stores the terminals of the fiber cables 5A, 5A, . . . which are respectively connected to the light receiving elements 2, 2, .

FIG. 4 shows another embodiment of the present invention, in which the intermediate medium IA,
IA... are arranged in parallel on the outer peripheral surface of the rotating cylinder 3B of the cylindrical rotating body 3A, and the light receiving elements 2A, 2A...
It receives optical signals. The difference from the embodiment shown in FIG. 1 is that the intermediate media 1, 1, . , IA, etc. should be installed. In the embodiment shown in FIG. 4, a large number of intermediate media LA, IA, etc. are arranged in parallel and separated by a predetermined distance, and on the other hand, the fixed body 6A side corresponds to the arrangement position of the intermediate media IA, IA, etc. Light receiving elements 2A, 2A, . . . are arranged.

Transmission of optical signals in the embodiments of FIGS. 1 and 4 is carried out in the manner shown in FIG. An optical signal converted from an electrical signal by the light emitting element 9 is incident from the end face part IB, which is a light part, through a lens 10, which is a condensing device.

Next, due to the incident light from the light emitting element 9, the entire circumferential portion IC, which is the light emitting portion of the intermediate medium 1°IA arranged concentrically and endlessly, emits light, and this optical signal is transmitted to the fixed body 6, The light is received by the light receiving elements 2 and 2A provided on the 6A side. The lens IOA is provided in front of the light-receiving elements 2 and 2A to condense optical signals.

Intermediate medium 1. Since the IA and the light receiving elements 2 and 2A are arranged at a required distance, optical signals are transmitted in a non-contact manner. Therefore, there are no sliding parts.

The optical signal is transmitted through an intermediate medium 1. The optical signal is received by the light receiving element 2.2A using the IA as a relay for signal transmission, and the detected optical signal is converted back into an electrical signal.

In the embodiments of FIGS. 1 and 4, as shown in FIG. 5, the intermediate medium 1. IA is shaped like a rotating circular ring and light emitting element 9
was placed on the rotating body 3.3A side, and the light receiving elements 2, 2A were placed on the fixed body 6, 6A side, but as shown in FIG.
On the contrary, the light receiving elements 2, 2A, the fixed body 6,
A light emitting element 9 may be provided on the 6A side. In this case, an intermediate medium 1 consisting of a circular ring-shaped optical fiber that focuses the light from the light emitting element 9 with a lens 10 and is disposed on the side of the rotating bodies 3 and 3A.
, the light enters the circumferential part IC of IA, and the end face part I which is the light emitting part
An optical signal is emitted from B, and is received by the light receiving elements 2, 2A via the lens 10A.

This intermediate medium 1. This optical fiber used for IA is realized by using a half mirror that partially transmits light and partially reflects the outer skin of the circumferential IC.

In this case, furthermore, to prevent weakening of the optical signal,
The modification shown in FIG. 7 is preferred.

That is, a fixed body 6B is disposed around the outer periphery of the rotary body 3A so as to cover the rotary body 3A, and intermediate media IA, IA, etc. made of optical fibers are disposed on the rotary body 3A in the gap between them. In this case, the inner surface of the fixed body 6B is a mirror surface to prevent the optical signal from spreading. Therefore, the light is condensed by the lens 10 of the light emitting element 9, and further passes through the aperture 14 to the intermediate media IA, IA.
... The diffused light that enters the rotating body 3A, which has intermediate media IA, IA, etc., and the fixed body 6B (intermediate media IA, IA...
A... The inner surface facing the side is a mirror surface), reflected by the mirror surface,
Again, the circumferential part I is the light entrance part of the intermediate media IA, IA...
Light enters C. This optical signal is emitted from the end face portion IB which is the light emitting portion of the intermediate medium IA, and is received by the light receiving element 2A via the lens IOA.

The light receiving element 2A converts the optical signal into a current signal, so that the signal from the fixed body 6B side is transmitted to the rotating body 3A side.

In addition, the above-mentioned intermediate media 1.1..., IA, IA...
Alternatively, a fluorescent lamp, which emits light by itself when an electric current is passed through it, and which flickers rapidly, may be used.

As described above, the present invention has a configuration in which signals are transmitted using an intermediate medium of optical signals, and therefore has the advantage that electrical signals can be stably and continuously transmitted between the rotating body and the fixed rest period.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram including a partial sectional view of an embodiment of the present invention, Fig. 2 is a right side view of a rotating body constituting the embodiment of Fig. 1, and Fig. 3 is a left side view of a fixed body. 4 is a schematic configuration diagram including a partial sectional view of another embodiment of the present invention, FIG. 5 is an explanatory diagram of the optical signal transmission mode in the embodiment of FIGS. 1 and 4, and FIG. , FIG. 7 is an explanatory diagram of another embodiment in which the optical signal transmission mode is different. 1, IA...Intermediate medium 1B...End face IC...Circumference part 2.2A...Light receiving element 3.3A...Rotating body 3B...Rotating cylinder 4.5... Connection terminal housing portions 6.6A, 6B... Fixed body 7... Bearing 7A... Shaft 9... Light emitting element 10, IOA... Lens 14... Opening Applicant Kawasaki Steel Corporation Agent Patent Attorney Yoshio Kosugi Patent Attorney Kazunori Saito

Claims (1)

[Claims] 1 A signal transmission device in which a plurality of pairs of light-emitting elements and light-receiving elements are arranged on a rotating body and a fixed body, and transmits signals between the rotating body and the fixed body, the end face portion of the cylindrical rotating body Alternatively, a plurality of intermediate media that emit light as a whole when an optical signal is incident in a ring shape on the outer peripheral surface are arranged, and the light emitting element for the optical signal is at the light input part of the intermediate medium, and the light emitting element for the optical signal is at the light output part of the intermediate medium. A signal transmission device characterized in that the light receiving elements for the optical signal are arranged in correspondence with each other.