JPH07297789A - Optical transmission system telemeter for rotating machine - Google Patents

Abstract

PURPOSE:To provide an optical transmission system telemeter for rotating machine which can be installed in a middle position in the lengthwise direction of a revolving shaft. CONSTITUTION:An optical transmission system telemeter 1 for a rotating machine uses a cylindrical transmission part 4 having plural light emitting elements 451, whose light emitting faces are placed outside the transmission part and are directed to the normal direction of a revolving shaft 96 and which are arranged at regular intervals, and an output part 3 having a light receiving element 31 which is so arranged that longer sides of its rectangular light reception face 31a are parallel with the lengthwise direction of the revolving shaft 96. The transmission part 4 is set between a main generator 91 and an exciter 94 of the revolving shaft 96 in a turbine generator 9, and the digital signal of parallel data corresponding to plural pieces of information on the rotor side taken out from a current detecting means (shunt resistor) 971, etc., is inputted to each light emitting element 451, and an optical signal 45a is emitted. Optical signals 45a are successively made incident on the light receiving element 31 in accordance with rotation of the revolving shaft 96, and the digital signal of serial data corresponding to rotor-side information is obtained in the output part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telemeter for outputting information on the rotor side to the outside of a rotary machine, and has been improved so that it can be installed at an intermediate position in the axial direction of a rotary shaft. Regarding configuration.

[0002]

2. Description of the Related Art In various rotary machines, as a device for acquiring information about the operating state of the rotating part,
Telemeters are already widely used. FIG. 11 is a block diagram for explaining the circuit configuration of a conventional optical transmission type telemeter for a rotary machine, which includes a transmitter for transmitting information on the rotor side by light, and FIG. 12 is shown in FIG. It is explanatory drawing for demonstrating the mounting state to the rotary machine of the telemeter of the optical transmission system for rotary machines. Note that, in FIG. 12, only the representative reference numerals are shown for the reference numerals given in FIG. 11.

In FIGS. 11 and 12, 9A is a main generator 91, a permanent magnet generator 92, a rectifier 93, and an exciter 9.
4. A turbine generator as a rotating machine including a rotary rectifier 95. The permanent magnet generator 92 included in the turbine generator 9A is, for example, a rotor 922 including a permanent magnet.
And a stator 921 that generates AC electricity by the magnetic flux obtained from the permanent magnet of the rotor 922. The rotor 922 is mounted on the outer circumference of the rotary shaft 96. The rectifier 93 rectifies the AC electricity generated by the permanent magnet generator 92 in the stator 921 to convert it into DC electricity, and then supplies this DC electricity to the exciter 94. The exciter 94 includes a stator 941 that allows direct current electricity obtained by the rectifier 93 to flow therethrough to generate a field flux, and a stator 941.
The rotor 942 that generates AC electricity by the magnetic flux obtained in 1 is provided. This rotor 942 also has a rotating shaft 96.
It is attached to the outer periphery of. The rotary rectifier 95 is mounted on the outer peripheral portion of the rotary shaft 96, and the exciter 94 rectifies the AC electricity generated in the rotor 942 and converts the AC electricity into DC electricity. Supply to 91.

The main generator 91 is driven by a rotary rectifier 95.
Rotation to generate field flux by passing DC electricity obtained by
By the magnetic flux obtained by the rotor 912 and the rotor 912,
A stator 911 that generates galvanic electricity is provided. Main generator
The rotor 912 of 91 is also mounted on the outer circumference of the rotary shaft 96.
There is. Each stator such as the stator 921 is shown in FIG.
Attached to the stator frame 98, only a part of which is shown schematically
Has been done. Further, the rotary shaft 96 has a shaft end 96a.
Hole 961 is drilled, and the rotary rectifier 95 is the main power generator.
The connecting wire 97 for passing the direct current supplied to the machine 91 is
It is laid via this hole 961. This rotating shaft 96
Is a bearing (not shown) (in the case of the turbine generator 9A,
Three or more bearings are installed, and the rotary shaft 96 is the shaft.
Make sure that vibration does not occur during rotation, including the end 96a.
It is supported by a lever bearing. ) Through the stator frame
It is supported by Meme 98. Turbine generator 9A smell
Is the excitation power supplied to the rotor 912 of the main generator 91.
Flow I_fIs the current of the shunt resistor installed on the connecting line 97.
This exciting current I detected by the detecting means 971 _fTo
Signal S with proportional value_iAs a pair of lead wires 972
Have been taken out by. In addition, the rotary rectifier 95
Therefore, the excitation voltage V supplied_fIs another lead 972
Using the signal S_vHas been taken out as.

Reference numeral 8 denotes an optical transmission type telemeter for a rotary machine (hereinafter, may be simply referred to as a telemeter) including a transmission section 6 and an output section 7. The transmitter 6 inputs the signal S _v and the signal S _i as information on the rotor side of the turbine generator 9A, and transmits an optical signal 62a corresponding to the exciting current I _f and the exciting voltage V _f. It is a circuit device and is attached to the shaft end 96 a of the rotating shaft 96. The transmitter 6 receives signals S _v and S that are analog signals.
a digital signal generator 61 which generates a digital signal S _D corresponding to _i, and the light emitting element 62 is a light emitting means for emitting a light signal 62a corresponding to the digital signal S _D to input digital signal S _D, the digital signal The power supply unit 69 supplies power to the generation unit 61 and the light emitting element 62.

The digital signal generator 61 amplifies each of the signal S _v and the signal S _i and, if necessary, also includes amplifier circuits 611 and 612 and a desired amplifier circuit 611 and 612. A signal synthesizing circuit unit 613 that synthesizes the amplified signals S _v and S _i by a time division method, and a synthetic signal that is an analog signal output from the signal synthesizing circuit unit 613 is converted into a serial data digital signal. A / D converter 614 and A / D converter 614
The drive circuit unit 615 that amplifies the power of the serial data digital signal obtained in step S6 and the pulse generation circuit unit 616 that supplies the timing pulse are provided, and the drive circuit unit 615 outputs the digital signal S _D that is the serial data digital signal. Is output. The timing pulse output from the pulse generation circuit unit 616 is used in the circuit unit 613 to give a reference time interval for time division, and the circuit unit 614 is also used.
, It is used to provide a reference time interval that determines the period of the digital signal when A / D conversion is performed. Further, as the power supply unit 69, a DC power supply using a battery, a DC power supply obtained by rectifying a high-frequency AC induced from a high-frequency source (not shown) provided in the output unit 7, and the like are generally used.

The output unit 7 receives the optical signal 62a and outputs the optical signal 62a.
Digital signal 7 corresponding to signal 62a_SDAnd analog
Signal 7_SAIs an electronic circuit device that outputs
It is attached to a portion of the shaft 98 facing the shaft end 96a.
The output unit 7 receives the optical signal 62a and outputs the optical signal 62a.
Light receiving element 7 which is a light receiving means for converting into a corresponding electric signal
1 and the digital signal of the serial data obtained by the light receiving element 71.
The digital signal 7_SDAnd analog signal 7
_SASignal conversion circuit section 72 for outputting
And a power supply circuit unit 79 that supplies power to the signal conversion circuit unit 72.
I have it. The signal conversion circuit unit 72 is obtained by the light receiving element 71.
Power amplification of the digital electric signal
Depending on the situation, a digital signal 7_SDOutput section
7, a drive circuit unit 721 for outputting to the outside of the drive unit 7, and the drive circuit unit
Digital signal 7 output by 721 _SDInput, digital
Signal 7_SDAnalog signal 7 corresponding to_SAOutside the output unit 7
And a D / A conversion circuit section 722 for outputting to.

In the telemeter 8, the centers of the light emitting element 62 and the light receiving element 71 are installed at the positions on the center line of the rotating shaft 96, so that the optical signal 62a is received by the light receiving element 71 without waste. There is. The telemeter 8 of the conventional example uses the optical signal 62a, the signal transmission between the transmission unit 6 and the output unit 7,
Since it is also performed using the optical signal 62a that is a digital signal resistant to noise, there is no risk of malfunction due to noise in the signal transmission portion, as compared with a high-frequency transmission type telemeter that performs signal transmission by radio waves. Thus, it is possible to obtain a highly reliable turbine generator 9A.

Further, as the information on the rotor side, in addition to the excitation current I _f and the excitation voltage V _f , for example, a case of detecting a leakage current value between the rotor side charging portion and the ground is also known. Has been. Furthermore, as a configuration of the rotor side of the turbine generator 9A, a configuration in which a rotary rectifier 95 is installed between a main generator 91 and an exciter 94 is also known.

[0010]

In the above-mentioned optical transmission type telemeter 8 for a rotary machine according to the prior art,
A highly reliable telemeter that does not malfunction due to noise has been obtained, but in recent turbine generators, the case of reducing the number of bearings is adopted in order to reduce the manufacturing cost. As a result, a new problem described below has occurred in the telemeter 8. That is, in the recent turbine generator 9, as shown in FIG. 13, the bearing 98a is connected to the turbine 99 and the main generator 91.
And the other one is installed between the main generator 91 and the exciter 94, and the total number of bearings 98a for the turbine generator 9 is set to the minimum number of two. There is. In this case, the shaft end 96a of the rotating shaft 96 is supported in an overhanging state from the bearing 98a, as compared with the case of the turbine generator 9A in which the rotating shaft 96 is supported by three or more bearings 98a. Therefore, the vibration will increase. The increase in the vibration of the shaft end 96a means that the optical signal 6 received by the light receiving element 71
Since the ratio of 2a is decreased, the ratio of the optical signal 62a transmitted to the light receiving element 71 is decreased. Because of this, the optical signal 62a
Therefore, the telemeter 8 needs to have a high output and its power consumption increases. For example, the power value of the digital signal S _D output from the drive circuit unit 615 included in the transmission unit 6 needs to be increased.

Due to the increase of the vibration at the shaft end 96a described in the above item, the transmitter 6 which is an electronic circuit device is
Since it is always excited by a large amplitude,
The life of the transmitter 6 is shortened. In order to solve the problem described in the above item, if the telemeter is installed not in the shaft end 96a but in the middle of the rotary shaft 96, the light emitting element in the optical transmission type telemeter using the light with strong directivity This cannot be used because it is impossible to always transmit an optical signal between the light receiving element and the light receiving element. Inevitably, there is no choice but to adopt a high-frequency transmission method using radio waves having a low directivity. However, in this high-frequency transmission method, malfunction may occur due to noise as described above. Further, in addition to the above items, there are the following problems.

In the telemeter 8, the current detecting means 971
Is installed between the main generator 91 and the rotary rectifier 95, the lead wire 972 needs to be laid long from near the installation position of the current detecting means 971 to the shaft end 96a. It takes a long time to work. The present invention has been made in view of the above-mentioned problems of the conventional art, and an object thereof is to provide an optical transmission type telemeter for a rotary machine that can be installed at an intermediate position in the axial direction of a rotary shaft. is there.

[0013]

According to the present invention, the above-mentioned objects are as follows: 1) Rotating information on the rotor side of a rotary machine having a stator and a rotor supported by the stator via a rotary shaft. It is a telemeter that outputs to the outside of the machine, and includes a transmitter that is mounted on the rotor and transmits information on the rotor side by light, and a light receiving unit that is mounted on the stator and uses information transmitted from the transmitter by light. In an optical transmission type telemeter for a rotating machine, which is contactlessly received via an output section for outputting a signal corresponding to the information to the outside of the rotating machine, the transmitting section includes:
A digital signal generator that generates information on the rotor side as a digital signal and a light emitter that emits light based on the digital signal generated by the digital signal generator are provided. The light emitting device has a plurality of light emitting elements arranged with their light emitting surfaces oriented in the direction normal to the rotation axis, and the output section has a light receiving means for receiving the light emitted from the light emitting elements, or 2). In the means described in the item 1, the light emitting means included in the transmitting unit has a configuration in which a plurality of light emitting elements are connected in parallel with respect to the digital signal generated by the digital signal generating unit, or 3) the above 1 The digital signal generator included in the transmitter outputs a plurality of bits of parallel data as a digital signal, and the light emitter included in the transmitter outputs the parallel data. It is configured such that each is input to different light emitting elements arranged in the arrangement order of a plurality of bits, or 4) in the means described in any one of the above items 1 to 3, the light receiving means provided in the output unit is a rotating device. A light-receiving surface that is long along the axial direction of the shaft,
Further or 5) In the means described in any one of the items 1 to 3, the light receiving means included in the output unit is configured by using a fluorescent fiber, and the fluorescent fiber rotates at least a part in the length direction. It is achieved by arranging in parallel with the axial direction of the shaft and using the side surface of the portion arranged in parallel with the rotation axis as a light receiving surface.

[0014]

According to the present invention, in the optical transmission type telemeter for a rotating machine, the transmitting section includes a digital signal generating section for generating information on the rotor side as a digital signal and a digital signal generated by the digital signal generating section. And a light emitting means which emits light based on the light emitting means, the light emitting means is arranged on the outer periphery of the rotating shaft with the light emitting surface oriented in the normal direction of the rotating shaft, and is generated by, for example, a digital signal generating section. A plurality of light emitting elements included in the light emitting means are provided by including a plurality of light emitting elements connected in parallel for digital signals, and the output unit includes a light receiving means for receiving the light emitted from the light emitting elements. The light signals of the same content are emitted from the respective light emitting elements. The optical signals emitted by the respective light emitting elements are sequentially incident on the light receiving means included in the output section according to the rotation of the rotating shaft. Therefore, even if the telemeter is installed at an intermediate position in the axial direction of the rotary shaft, the information on the rotor side can be obtained through the optical signal.

The transmitting section includes a digital signal generating section for generating information on the rotor side as a digital signal and a light emitting means for emitting light based on the digital signal generated by the digital signal generating section. Outputs a plurality of bits of parallel data as a digital signal, and the light emitting means has a plurality of light emitting elements arranged on the outer periphery of the rotating shaft with the light emitting surface oriented in the normal direction of the rotating shaft, and, for example, The parallel data is input to different light emitting elements arranged in the order of arrangement of a plurality of bits, and the output section includes a light receiving unit for receiving the light emitted from the light emitting element. An optical signal corresponding to a digital signal, which is parallel data of information on the rotor side, is emitted from each of the plurality of light emitting elements included in the means. This optical signal is sequentially incident on the light receiving means included in the output section in accordance with the rotation of the rotating shaft. Therefore, even if the telemeter is installed at an intermediate position in the axial direction of the rotary shaft, the information on the rotor side can be obtained via the optical signal, and the light receiving means can store the information on the rotor side. Can be obtained as a digital signal converted into serial data.

In the above item (1), the light receiving means included in the output section is configured to have a light receiving surface formed long along the axial direction of the rotating shaft. Even if the rotary shaft moves due to its thermal expansion or the like so that the rotary shaft of the transmitter of the telemeter and the rotary shaft of the output unit move relative to each other in the axial direction, the optical signal emitted from the light emitting means included in the transmitter. Can irradiate any part of the light-receiving surface of the output part, which is formed long in the axial direction of the rotating shaft, and is reliably received by the light-receiving part. It becomes possible.

In the above paragraphs, the light receiving means included in the output unit is configured by using a fluorescent fiber as the light receiving unit included in the output unit, and the fluorescent fiber has at least a part of its length direction in the axial length of the rotating shaft. Placed parallel to the direction,
Moreover, by using the side surface of the portion arranged in parallel with the rotation axis as the light receiving surface, in addition to the function in the above section, the well-known unique function of the fluorescent fiber is utilized. It becomes possible. That is, in the fluorescent fiber, a luminous flux having a wavelength longer than that of the luminous flux incident from the side surface is generated therein, and the luminous flux having the long wavelength is transmitted in the longitudinal direction of the fluorescent fiber. In the telemeter according to the present invention, this long-wavelength light beam is naturally obtained as a digital signal in which the information on the rotor side is serialized. Therefore, by using this long-wavelength light beam as a signal source. It is possible to widely select the method of transmitting information on the rotor side.

[0018]

Embodiments of the present invention will be described in detail below with reference to the drawings. Embodiment 1; FIG. 4 is a block diagram for explaining the circuit configuration of an optical transmission type telemeter for a rotary machine according to an embodiment of the present invention corresponding to claims 1, 2 and 4, and FIG. 6 is an explanatory diagram for explaining a mounting state of the telemeter shown in FIG. FIG. 6 is a perspective view showing a state in which the transmitter of the telemeter shown in FIG.
FIG. 7 is a perspective view showing the transmitting section of the telemeter shown in FIG. 6 together with the light receiving means included in the output section. 4 to 7, the same parts as those of the optical transmission type telemeter for a rotary machine according to the conventional example shown in FIGS. 11 to 13 are designated by the same reference numerals, and the description thereof will be omitted. In addition, in FIG.
Regarding the reference numerals given in FIG. 12, only representative reference numerals are shown. In addition, in FIG. 7, as for the reference numerals given in FIGS. 4 to 6, only representative reference numerals are shown.

4 to 7, reference numeral 1A designates a transmitter 2 instead of the transmitter 6 in the optical transmission type telemeter 8 for a rotary machine according to the conventional example shown in FIGS. 11 to 13. , An optical transmission type telemeter for a rotary machine, in which the output unit 3 is used instead of the output unit 7. The transmitter 2
It differs from the conventional transmission unit 6 in that the light emitting means 21 is used instead of the light emitting means 62. The light emitting means 21 includes a plurality (N) of light emitting elements 211A and 21A.
1B to 211N, and these light emitting elements 211
(Hereinafter, the light emitting elements 211A and 211B to 211N may be collectively referred to as this.) Are connected in parallel with respect to the digital signal S _D output by the digital signal generation unit 61. Therefore, each of the light emitting elements 211 has the optical signal 62 emitted from the light emitting element 62 of the conventional example.
The optical signal 21a exactly the same as a is emitted. The transmitter 2 is formed in a cylindrical shape, and is attached to a portion of the rotary shaft 96 between the main generator 91 and the exciter 94. The light emitting element 211 covers the entire circumference of the outer peripheral portion of the transmitter 2.
For example, they are arranged at equal intervals. Moreover, the light emitting element 2
11 is mounted so that its light emitting surface faces the outside of the transmitter 2 in the direction of the normal to the rotary shaft 96. Note that the distance dimension (or angle) between the respective light emitting elements 211 is irrespective of the rotation speed of the rotation shaft 96 and the pulse interval of the digital signal of the serial data obtained by the A / D conversion unit 614. It is possible to set an appropriate interval dimension.

The output section 3 differs from the conventional output section 7 in that the light receiving element 71 is used in place of the light receiving element 71. The output section 3 holds the light-receiving element 31 so that the light-receiving surface 31a thereof faces the central axis of the cylindrical transmission section 2. Light receiving element 3
One light receiving surface 31a is formed in a rectangular shape, and the long side of this light receiving surface 31a is arranged parallel to the axial direction of the rotation shaft 96.

In the first embodiment shown in FIGS. 4 to 7, the output section 3 rotates together with the rotary shaft 96 because of the above-mentioned configuration. As a result, each light emitting element 21
The optical signal 21a emitted from the optical signal 21a is sequentially incident on the light receiving element 31 included in the output unit 3 according to the rotation of the rotating shaft 96, and therefore the optical signal 21a emitted from any one of the light emitting elements 211 is input to the light receiving element 31. However, it will be incident in most of the period. Therefore, from the light receiving element 31, as in the case of the light receiving element 71 of the conventional example, the optical signal 2
1a, therefore, a digital electric signal of serial data corresponding to the digital signal S _D is obtained. At that time, the pulse interval of the digital signal of the serial data obtained by the light receiving element 31 is independent of the rotation speed of the rotation shaft 96, that is, even if the rotation speed of the turbine generator 9 is changed, Even if the rotary machine to which the telemeter 1A is mounted is a variable speed machine, the pulse interval of the digital signal S _D is the same. Therefore, the telemeter 1A is attached to the rotary shaft 9
Even if it is installed in the middle of 6, information on the rotor side can be obtained through the optical signal 21a.

Further, a turbine generator 9 which is a power device
Is the rotor 91 of the main generator 91 during operation.
Since a large amount of heat loss is generated in No. 2, the temperature increase due to this heat loss causes thermal expansion of the rotating shaft 96. In the case of the configuration according to the first embodiment, the rotary shaft 96 moves in the axial length direction due to its thermal expansion, etc., and the mutual position of the rotary shaft 96 of the transmitter 2 and the output unit 3 of the telemeter 1A in the axial length direction. Even if the optical signal 21a is emitted from the transmitter 2, the optical signal 21a emitted from the transmitter 2 can irradiate any part of the light-receiving surface 31a formed in the output unit 3 and long in the axial direction. It is possible. Therefore, the optical signal 21a
Is reliably received by the light receiving element 31, and from this point as well, even if the telemeter 1A is installed in the middle of the rotary shaft 96, the information on the rotor side can be obtained via the optical signal 21a. is there.

In the case of the telemeter 1A according to the first embodiment, in the digital signal obtained by the light receiving element 71, the respective data regarding the information on the rotor side may be continuous with each other. If this makes it difficult to clearly capture the division of each data relating to the information on the rotor side, it is possible to recognize the start point of the data in the digital signal S _D by customary start. It is effective to add bits.

Embodiment 2; FIG. 2 is a block diagram for explaining the circuit configuration of an optical transmission type telemeter for a rotary machine according to an embodiment of the present invention corresponding to claims 1, 3 and 4. FIG. 3 is an explanatory diagram for explaining a mounting state of the telemeter shown in FIG. 2 on a rotary machine. FIG. 3 is a perspective view showing a mounting state of the transmitting section of the telemeter shown in FIG. 1 on a rotating shaft together with a light receiving means included in the output section. 1 to 3, an optical transmission type telemeter for a rotary machine according to an embodiment of the present invention corresponding to claims 1, 2, and 4 shown in FIGS. 4 to 7, and FIGS. The same parts as those of the optical transmission type telemeter for a rotary machine according to the conventional example shown are denoted by the same reference numerals and the description thereof will be omitted. In addition, in FIG. 1, about the code | symbol attached in FIG. 2, FIG. 12, only the typical code | symbol was described. In addition, in FIG.
Regarding the reference numerals given in FIG. 2, only representative reference numerals are shown.

1 to 3, reference numeral 1 denotes an optical transmission type telemeter 1A for a rotary machine according to an embodiment of the present invention corresponding to claims 1, 2 and 4 shown in FIGS. Then, the optical transmission type telemeter for a rotary machine is configured such that the transmitting unit 4 is used instead of the transmitting unit 2. The transmitter 4
It differs from the transmitter 2 included in the telemeter 1A in that a digital signal generator 41 is used instead of the digital signal generator 61 and a light emitting means 45 is used instead of the light emitting means 21.

The digital signal generation section 41 uses the drive circuit section 43 in place of the drive circuit section 615 for the digital signal generation section 61, and between the drive circuit section 43 and the A / D conversion section 614. The shift register 42 is provided.
The shift register 42 is a well-known serial-parallel conversion shift register that converts a serial data digital signal obtained by the A / D conversion unit 614 into a parallel data digital signal. The shift register 42 receives the timing pulse output from the pulse generation circuit unit 616, and converts the serial data digital signal into parallel data having the same number of bits as the number of M bits included in the serial data digital signal. Convert to digital signal. The drive circuit unit 43 includes the same number (M) of individual drive circuits 44A and 44B to 44M as the number of bits of the digital signal of the parallel data, and these individual drive circuits 44 (hereinafter, individual drive circuits 44A, 44B to 44M may be collectively referred to as such.), The digital signal of each bit of the digital signal of the parallel data obtained by the shift register 42 is input, and power amplification is performed. The digital signal S _D4 of M-bit parallel data corresponding to the analog signals S _v and S _i is output.

The light emitting means 45 has the same number of light emitting elements 451A, 451B to 451 as the number of bits of the digital signal S _D4.
Each of the light emitting elements 451 (hereinafter, may be referred to as "light emitting elements 451A, 451B to 451M") is provided with a digital signal output from the digital signal generation unit 41. S _D4 is sequentially input to different light emitting elements 451 in accordance with the arrangement order of the M-bit digital signals of the digital signal S _D4 . Therefore, the respective light emitting elements 451 have the optical signal 4 corresponding to the digital signal S _D4 of the parallel data according to the arrangement order.
5a will be emitted.

The transmitter 4 is formed in a cylindrical shape, and is mounted on the rotary shaft 96 between the main generator 91 and the exciter 94. The light emitting element 451 has the transmitting unit 4
Is mounted on the outer peripheral portion of the so that its light emitting surface faces the outside in the direction of the normal to the rotary shaft 96. Further, the intervals between the respective light emitting elements 451 (the light emitting elements 451A and 451B to 451M) are, for example, the rotation speed of the rotation shaft 96 and the serial signal digital signal obtained by the A / D conversion unit 614. It is arranged by an angular interval determined from the pulse interval.

In the second embodiment shown in FIGS. 1 to 3, the optical signal 45a corresponding to the digital signal S _D4 of the parallel data is received by the output unit 3 according to the rotation of the rotary shaft 96 because of the above configuration. The light is sequentially incident on the element 31. As a result, at the output unit 3, at least one piece of data regarding the rotor side information of the optical signal 45a, and hence the digital signal of serial data obtained by the A / D conversion unit 614, is rotated once by the rotation shaft 96. During that time, a digital electric signal of serial data which is input during the rotation of the rotor side information is obtained. Note that the range of the light emitting element 451 arranged on the outer peripheral portion of the transmitter 2 is narrower than 360 degrees in many cases. (It means that the distance between the light emitting element 451M and the light emitting element 451A is wider than the distance according to the above-mentioned equal interval.) Therefore, the light receiving element 31 receives the optical signal 45a emitted from the light emitting element 451A. It is possible to clearly capture the generated digital signal for each revolution of the rotary shaft 96.

In the above description of the second embodiment, the digital signal S _D4 output by the transmission unit 4 is the information on all rotor sides (in the case described in the second embodiment up to now, the exciting current I _f and The excitation voltage V _f ) is always included, but the present invention is not limited to this.
For example, the information on all the rotor sides is the A / D conversion unit 614.
The digital signal of the serial data obtained in step 1 is divided into an appropriate number of bit groups and supplied to the light emitting element 451, and the optical signal 4
5a may be sequentially transmitted. In such a case, there are many kinds of information on the rotor side, the diameter of the rotating shaft 96 is thin, or the radial dimension of the light emitting element 451 is large. , A light emitting element 45 mountable on the light emitting means 45
When the number is 1, it may occur when it is not possible to simultaneously transmit the digital signals S _D4 having the number of bits corresponding to the information on all the rotor sides. The digital signal S _D4 sequentially divided and transmitted by the optical signal 45a is reconstructed into a serial data digital signal at the output unit 3, so that the digital signal 7 corresponding to all the rotor side information can be obtained. It becomes possible to take out the _SD and the analog signal 7 _SA from the output section 3.

This is because, in a large-capacity rotary electric machine such as the turbine generator 9, the time constant of the exciting current _If is extremely long, from several seconds to several tens of seconds, so that the rotating shaft 96 rotates once. For each short time interval (when the turbine generator 9 having 2 poles outputs 50 [] AC electricity, this time is 20 [ms]. Since there is rarely a case where one piece of data related to all the rotor side information is required, it is possible to adopt division of the rotor side information for transmission as described above.

In such a case, the light emitting element 451
Has to be installed over the entire circumference of the outer peripheral portion of the transmitter 2, so that the optical signal 4 emitted from the light emitting element 451A is
In some cases, it may be difficult to clearly capture the digital signal generated in the light receiving element 31 corresponding to 5a. To cope with this, it is effective to provide a start bit in the digital signal S _D4 so that the start point of the data can be recognized.

Embodiment 3; FIG. 8 is a block diagram for explaining the circuit configuration of an optical transmission type telemeter for a rotary machine according to an embodiment of the present invention corresponding to claims 1 to 3, and FIG. FIG. 9 is a perspective view showing a mounting state of the transmitting section of the telemeter shown in FIG. 8 on a rotating shaft together with a light receiving means included in the output section. 8 and 9, an optical transmission type telemeter for a rotary machine according to an embodiment of the present invention corresponding to claims 1, 3 and 4 shown in FIGS. 1 to 3, and FIGS.
The same parts as those of the optical transmission type telemeter for a rotary machine according to the conventional example shown in FIG. 13 are designated by the same reference numerals, and the description thereof will be omitted. In addition, in FIG. 9, as for the reference numerals given in FIG. 8, only representative reference numerals are shown.

In FIGS. 8 and 9, 1B is shown in FIGS.
An optical transmission type telemeter 1 for a rotary machine according to one embodiment of the present invention corresponding to claims 1, 3 and 4, wherein an output section 5 is used instead of the output section 3. It is an optical transmission type telemeter for use in. The output unit 5 is
The light receiving means 31 is provided for the output section 3 of the telemeter 1.
In that it is provided with a light receiving section 51 as a light receiving means. The light receiving unit 51 receives the optical signal 45a corresponding to the digital signal S _D4 of the parallel data output by the transmitting unit 4 on its side surface, and the light receiving fiber 511 and the light receiving fiber 511.
It is configured using a light receiving element 512 that receives the light flux 511a obtained in (1). A fluorescent fiber is used as the light receiving fiber 511, which is arranged in parallel with the axial direction of the rotating shaft 96, and a light receiving element 512 is installed at a position facing the tip end that emits the light beam 511a. .

By the way, as is well known, the fluorescent fiber has a structure as shown in FIG.
Here, FIG. 10 is an explanatory view for explaining an example of the fluorescent fiber, (a) is a perspective view of the fluorescent fiber seen from the end, and (b) is a fluorescent fiber according to FIG. 10 (a). FIG. 3 is a cross-sectional view that schematically shows the configuration of FIG. In FIG. 10, 511 is a fluorescent fiber which is a light receiving fiber, 511A is, for example, a polycarbonate core, and 511C is a clad having a refractive index smaller than that of the core 511A. Fluorescent fiber 5
In 11, the core 511A is doped with the organic phosphor 511B. One feature of the fluorescent fiber 511 is that the light to be captured can be captured from the side surface thereof. In this way, the organic phosphor 511B receives the optical signal 45a by the optical signal 45a incident from the side surface thereof.
It emits a light beam 511a having a wavelength longer than that of
This light flux 511a has the same principle as that of a general optical fiber, and has a core 511a and a clad 511C whose refractive index suddenly changes.
Fluorescent fiber 511 while repeating reflection at the boundary surface with
The light travels in the length direction and is received by the light receiving element 512.

In the third embodiment shown in FIGS. 8 and 9, the optical signal 45a corresponding to the digital signal S _D4 of the parallel data is generated by the output section 5 according to the rotation of the rotary shaft 96 because of the above configuration. The light is sequentially incident on the fiber 511 from its side surface. Thereby, the fluorescent fiber 511
Then, a light beam 511a having a digital signal of serial data corresponding to the optical signal 45a and thus the digital signal S _D4 is obtained. From the light receiving element 512 on which the light flux 511a is incident, the light flux 511a, and hence the digital electric signal of serial data corresponding to the digital signal S _D4 , is obtained.

Although the light flux 511a obtained by the fluorescent fiber 511 is converted into an electric signal by the light receiving element 512 in the output section 5 in the above description of the third embodiment, the invention is not limited to this. Not something
For example, by connecting to the fluorescent fiber 511 or a general optical fiber on the way, the light beam 511a may be transmitted as it is to a device that uses information on the rotor side.

Further, in the above description of the third embodiment, the telemeter 1B is provided with the transmitting section 4 as the transmitting section, but the present invention is not limited to this. For example, the transmitting section provided is the first example. It may be the transmission unit 2 according to. Furthermore, in the above description in the first to third embodiments, the information on the rotor side such as the signal S _i and the signal S _v has been output as the digital signal 7 _SD and the analog signal 7 _SA from the output section. However, the present invention is not limited to this, and it goes without saying that, for example, the information on the rotor side may be output as an electric signal of either a digital signal or an analog signal.

[0039]

According to the present invention, the optical transmission type telemeter for a rotary machine has the above-mentioned structure, and thus has the following effects. That is, the optical signals emitted from the plurality of light emitting elements included in the transmission unit are sequentially incident on the light receiving unit included in the output unit as the rotation axis rotates. Therefore, even if the telemeter is installed at an intermediate position in the axial direction of the rotary shaft, the information on the rotor side can be obtained through the optical signal. Further, the light receiving means included in the output unit is configured to include the light receiving surface that is formed long in the axial direction of the rotating shaft, so that the transmitting unit includes the moving unit even if the rotating shaft moves due to thermal expansion or the like. Since the optical signal can illuminate any part of the light receiving surface of the light receiving means included in the output unit,
From this point of view, even if the telemeter is installed at an intermediate position in the axial direction of the rotary shaft, the information on the rotor side can be obtained via the optical signal. Further, due to the effect of the above-mentioned item, it becomes possible to install the transmitting portion of the telemeter at a portion of the rotating shaft of the rotating machine where vibration is minimal or in the vicinity thereof, so that the transmitting portion can have a long life. .

Further, since the ratio of the optical signal emitted from the transmitting section to the light receiving means provided in the output section is always stable, it is not necessary to increase the output of the telemeter. It is possible to prevent the power consumption of the telemeter from increasing. Further, due to the effect of the above item, it becomes possible to install the transmitter of the telemeter in the vicinity of where the current detecting means of the rotating shaft of the rotating machine is installed. The length of the lead wire to be used is shortened, and the time required for the installation work can be shortened. Furthermore, because of the effect of the above item, there is no need to install a telemeter at the shaft end of the rotary shaft, so that the degree of freedom in designing equipment such as permanent magnet generators that are often mounted near this shaft end is reduced. It will be possible to manufacture these devices under the optimum conditions.

[Brief description of drawings]

FIG. 1 is an explanatory view for explaining a mounting state of a telemeter shown in FIG. 2 described later on a rotary machine.

FIG. 2 is a block diagram illustrating a circuit configuration of an optical transmission type telemeter for a rotary machine according to an embodiment of the present invention corresponding to claims 1 to 3;

FIG. 3 is a perspective view showing a mounting state of a transmitting unit of the telemeter shown in FIG. 1 on a rotating shaft together with a light receiving unit included in an output unit.

FIG. 4 is a block diagram illustrating a circuit configuration of an optical transmission type telemeter for a rotary machine according to an embodiment of the present invention corresponding to claims 1, 2, and 4.

5 is an explanatory diagram for explaining a mounting state of the telemeter shown in FIG. 4 on a rotating machine.

6 is a perspective view showing a state in which the transmitter of the telemeter shown in FIG. 5 is attached to a rotating shaft.

7 is a perspective view showing the transmitter of the telemeter shown in FIG. 6 together with a light receiving means included in the output section.

FIG. 8 is a block diagram illustrating a circuit configuration of an optical transmission type telemeter for a rotary machine according to an embodiment of the present invention corresponding to claims 1 to 3;

9 is a perspective view showing a mounting state of the transmitting section of the telemeter shown in FIG. 8 on a rotating shaft together with a light receiving means included in the output section.

10A and 10B are explanatory views for explaining an example of a fluorescent fiber, FIG. 10A is a perspective view of the fluorescent fiber seen from an end, and FIG. 10B is a configuration of the fluorescent fiber according to FIG. The cross-sectional view showing a simulated

FIG. 11 is a block diagram illustrating a circuit configuration of a conventional optical transmission type telemeter for a rotary machine.

FIG. 12 is an explanatory diagram for explaining a mounting state of the optical transmission type telemeter for a rotary machine shown in FIG. 11 on the rotary machine.

FIG. 13 is a side view showing the structure of a turbine generator of a different general example together with related equipment for explaining the structure.

[Explanation of symbols]

 1 Telemeter 1A Telemeter 1B Telemeter 3 Output part 31 Light receiving element 31a Light receiving surface 4 Transmitting part 45a Optical signal 451 Light emitting element 9 Turbine generator 91 Main generator 94 Exciter 96 Rotating shaft 971 Current detecting means (shunt resistor)

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location G01R 31/34 Z H02K 11/00

Claims (5)

[Claims] 1. A telemeter for outputting information on a rotor side of a rotary machine having a stator and a rotor supported by the stator via a rotary shaft, the telemeter comprising: A transmitter that is mounted and transmits information on the side of the rotor by light, and information that uses light transmitted from the transmitter that is mounted on the stator is received in a non-contact manner through the light receiving means, and a signal corresponding to the information is received. In an optical transmission type telemeter for a rotating machine, which includes an output section for outputting the signal to the outside of the rotating machine, the transmitting section includes a digital signal generating section that generates rotor side information as a digital signal, and a digital signal generating section. A light emitting means for emitting light based on the generated digital signal, the light emitting means having a plurality of light emitting elements arranged on the outer periphery of the rotating shaft with a light emitting surface oriented in a direction normal to the rotating shaft. , The output part is Telemeter optical transmission system for a rotary machine, characterized in that it comprises a receiving means for receiving light emitted from the optical device. 2. The telemeter according to claim 1, wherein the light emitting means included in the transmitting unit is formed by connecting a plurality of light emitting elements in parallel with respect to the digital signal generated by the digital signal generating unit. Optical transmission type telemeter for rotating machinery. 3. The telemeter according to claim 1, wherein the digital signal generator included in the transmitter outputs a plurality of bits of parallel data as a digital signal, and the light emitting means included in the transmitter includes the parallel data. An optical transmission type telemeter for a rotary machine, characterized in that each is input to different light emitting elements arranged in an arrangement order of a plurality of bits. 4. The telemeter according to any one of claims 1 to 3, characterized in that the light receiving means provided in the output portion has a light receiving surface formed long along the axial direction of the rotating shaft. Optical transmission type telemeter for rotating machinery. 5. The telemeter according to any one of claims 1 to 3, wherein the light receiving means included in the output section is configured by using a fluorescent fiber, and the fluorescent fiber rotates at least a part of its length direction. An optical transmission type telemeter for a rotary machine, characterized in that it is arranged in parallel with the axial length direction of the shaft, and the side surface of the portion arranged in parallel with the rotation axis is used as a light receiving surface.