JPS60108036A - Signal transmitter of rotary system and stationary system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a signal transmission device between a rotating system and a stationary system. This invention relates to a signal transmission means between a rotating system and a stationary system suitable for transmitting six information signals between them.

[Technical background of the invention]

Conventionally, a slip ring is used between the rotating system and the stationary system as a means of detecting information signals such as X-ray transmission data inside a rotating system such as a CT scanner and transmitting this to an external stationary system. It is.

[Problems with conventional technology]

In addition to the above-mentioned signal transmission means using a slip ring, the mechanical contact in the slip ring is used to transmit signals.
Since @ is transmitted from the rotating system to the stationary thread,
Depending on the frequency of use, the slip ring wears out severely and needs to be replaced periodically.

Furthermore, particularly when transmitting high-frequency signals, there is a problem in that the S/N ratio deteriorates and the signal level decreases due to instability of the contact circuit resistance at the contact points of the slip ring.

Furthermore, although this type of signal transmission means has been developed for relatively small devices and can be expected to be reliable, it has not been put into practical use for large devices, and When a transmission line is required, the signal transmission means becomes a market price, and there is a problem in that the high voltage transmission section or the power transmission section and the signal quantity cannot be easily accommodated by a guest.

Purpose of [invention]]

The present invention has been made in view of the above-mentioned concerns.By forming a No. 46 transmission line using optical signals between a rotating system and a stationary thread, the present invention has excellent image quality and reliability on the pX field side. The object of the present invention is to provide a signal transmission device between a four-way yarn and a stationary yarn, which can extend the life of the yarn and reduce the cost.

[Overview of the invention]

In order to achieve the above purpose, the invention of this defense consists of a rotating system that has a cave in the center of rotation and is formed so that no signal transmission path is obstructed, and a stationary system around the rotating system. In a signal transmission device between a rotating system and a stationary system configured to transmit 46 months between them, a plurality of signals are transmitted to any electric power other than on the circumference of the rotating system and on the co-rotating axis of the stationary system. A transmitting means for generating a light wave containing a signal is provided, and a receiving means for collecting and receiving the light 121i'e from the transmitting means and collecting a plurality of signals is provided, and control signals are sent and received by these transmitting and receiving means. It is characterized by:

[Embodiments of the invention]

Examples of the present invention will be specifically described below.

FIG. 1(a) is a schematic plan view showing a signal transmission device between the (b) 1 system and the stationary system.

In the figure, 1 is a stationary thread, 2 is a rotating system, and a gear 3 is provided in a circular hole 1a of the stationary system 1 along its inner peripheral surface.

The rotating system 2 includes a rotating body 2 arranged concentrically with the circular hole 1a.
a, and this (b) rolling body 2a is adapted to be driven to rotate multiple times continuously by a driving means (not shown).

The rotating body 2a includes an optical axis control means 4.

an optical axis control means 4id, a deceleration means 6 which is rotatably supported on the rotating body 2a and is formed by meshing the gear 3 with a gear 5 provided on the outer periphery; The disk cam 7, which is supported by the disk cam 7, and the arm 8, which is supported by the disk cam 7, are facing south.

However, it is also possible to adopt a multi-stage configuration corresponding to the rotational speed of the rotating body 2a.

Said I! A cavity 2b is formed in the center of rotation of the 21 rolling element 2a, and a signal transmission path cannot pass through the cavity 2b.

A multiple FM modulator 9 is arranged on the rotor 2a, and the arm 8 is equipped with a transmitting means 10 for generating light waves.

For example, a plurality of control signals are input to the multiplex FM modulation al#gf9, and this control signal is FM modulated and then converted into an optical signal and input to the transmission means 0 via the optical fiber 11. It has become. The transmitting means 10 emits light 't1M including a plurality of signals toward the stationary system 1.

Optical axis control means 4a having the same configuration as the above-mentioned optical axis control means 4 is disposed on the front rotor 2a at a symmetrical position,
A feeding means 10a is attached to the arm 8a. The transmitting means 10a and the multi-HF M modulator 9 are connected via an optical fiber 11a, and both transmitting stages 10.
The optical axis control means 4 and 4a are used to align the light waves emitted from the stationary system 1 at the fixed point P of the stationary system 1! l are controlled individually.

The stationary system 1 includes a light collecting means 12 which focuses on the foot point P and is made of a parabolic reflector, and a receiver 13 which receives the light waves collected by the light collecting means 12. The apparatus includes an FM multiplex modulator 15 connected to a receiving section 13 of the receiving means via an optical fiber 14.

Although not shown, power is transmitted to the FM polymorphic modulator 9 transmitting means 10, 10a, etc. provided in the rotating system 1 via a slip ring having a relatively simple configuration.

Next, the operation of the S-configuration signal transmission device will be described with reference to the schematic side view in FIG. 1 (-) and the block diagram shown in FIG. 2.

Control values generated in rotating system 2 - @A, B, ......
N (For example, CT ski gear's Xi transparent tailor is multiff
1i F M It is input to Shuni1'l unit 9 and multiplexed F
The signal is M-modulated and converted into a B-C signal, which is input to the transmitting means IO via the optical fiber 11.

The transmitting means 10 attached to the optical axis control station 1+ class 4 emits light waves containing a plurality of signals toward a point P in the stationary system.

Now, to explain the operation of the control means 4 of 94111, when the rotating system 20I11!1 palpitations 2a is rotationally driven from the state shown in FIG. 1(a) to the state shown in FIG. 1(b), the deceleration means 6 is also displaced while rotating together with the rotating body 2a.

By setting the rotation angle of the disc cam 70 rotationally driven via the deceleration means 6 so as to match the displacement angle of the deceleration means 6 and the disc cam 7, the axis of the arm 8 can be adjusted to This coincides with the fixed point P, so that the light waves emitted from the transmitting means 10 can always be directed to the fixed point P.

The light waves thus radiated toward the fixed point P are input to the multi-mFM demodulator 15 via the optical fiber 14.

The multiplex FM demodulator 15 photoelectrically converts the input light t11 and sends it out as individual electrical signals x, B'...N. These electrical signals A', B'...
...N' is a rotating system 20 guided by a signal processing device (not shown).
The control code is used, for example, to reproduce on a TV screen.

In the embodiment described above, the optical axis control means 4aK using external force
A light beam is also input to the condensing means 12 from the attached transmitting means 10a, but in this case, the electric power of either of the two light beams may be detected by an electrical processing means. .

The reason for using two symmetrically arranged optical axis control means 4, 4a and sending means io, ioa is to maintain an optimized path 11f over the entire circumference of the rotation system 2.

Incidentally, when the above-mentioned Im signal transmission device is applied to an X-ray scanner, the condensing means 4 and the receiving section 13t cannot be disposed on the side surface of the XlfM scanner mount and in the space before and after the rotation center axis direction.

Therefore, it is convenient to arrange the light condensing means 4 and the receiving section 13 on the ceiling or the floor.

Furthermore, in the above-mentioned signal transmission device, a case has been described in which the rotating system 2 is provided with the light wave sending means 10, 10at-1 and the stationary thread 1 is provided with the receiving means. It is also possible to configure a communication path even if the device is equipped with a transmitting means.

The present invention is not limited to the embodiments described above, and various modifications can be made within the scope of the invention.

For example, an optical wavelength multiplexing/combining two-branch gain may be used for the post-modulation device after FM multiplexing, or an arbitrary number of rotating optical axis control means and transmitting means may be provided.

Further, a configuration may be adopted in which a large number of photodiodes are arranged in a curved shape as a light condensing means.

Furthermore, a servo mechanism may be used as the original axis control means to control the optical axis of the light wave. For example, the rotation angle of the rotating body is detected outside the rotating body, and based on the detection signal, a control signal for the servomechanism is transmitted to the rotating body via the above-mentioned signal transmission path to control the angle of the transmitting means. It can also be configured as follows.

〔Effect of the invention〕

According to the present invention described in detail above, since the signal transmission between the rotating system and the stationary system is carried out by light waves, there is no mechanical contact part and there is no influence of electromagnetic induction from the outside. - It is possible to provide a signal transmission device that is free from damage, has excellent noise resistance, and has a long service life.

In addition, since it is constructed with a simple mechanism and semiconductor circuit, it is possible to provide a highly reliable and low-cost I-B transmission device.

[Brief explanation of drawings]

FIG. 1(a) is a schematic side view showing an embodiment of the present invention. FIG. 1(b) is a schematic side view showing a rotating state of the rotation system as described above, and FIG. 2 is a block diagram showing a state of signal transmission as described above. 1... Stationary system, 2... Rotating system, 10.10B...
Transmitting means, 12... Focusing means, 13... Receiving section. Agent Patent Attorney Kensuke Chika (and 1 other person) 5PJ2
figure

Claims (1)

[Claims] (1) A rotating system with a cavity in the center of rotation to the south so that any No. 46 transmission line does not block this i'L, and
! , +1 In order to transmit No. 48 to the stationary yarn around the turned yarn (1), in the signal transmission device I'1 between the rotating system and the stationary yarn, the rotation of the oiRft rotary heel is stopped and ~ In one of the stationary systems other than the lul rotation axis, a 6+ stage is provided to generate the light containing the signal of 'me', and on the other side, the light wave 'f' from the transmitting means is set up. A signal transmission device between a rotating system and a stationary system, characterized in that a receiving means for collecting a plurality of No. 18 signals is provided, and signals are transmitted and received by these sending and receiving means.