JPH0668373A - Transmitter receiver for various quantities of rotary body - Google Patents

Abstract

PURPOSE:To obtain superior noise resistance and widen the application range of the structure of a body to be measured by arranging a 1st optical element of a rotation-side transmission unit in the circumferential direction of the rotary body and selectively arranging plural fixed-side reception units in the circumferential direction of a fixed side. CONSTITUTION:Each fixed-side reception unit 6 receives a light signal sent by the light emitting element 5a of the rotation-side transmission unit 4 by a light receiving element 7b, converts it into a digital signal, and outputs various quantity measurement digital signals to the fixed-side processing unit 8. Then the various quantity measurement digital signals are made parallel, and 0Red and processed. Further, the transmission and reception of the various quantity measurement light signals are performed while a 1st optical element 5 and a 2nd optical element 7 are set opposite each other, and only one optical element 5 is required. Then the rotation side transmission unit 4 updates the channel each time a trigger signal is received. Further, plural fixed-side reception units 6 are arranged in the circumferential direction and signals received by respective units are processed by the fixed-side process unit 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating body quantity measuring device for measuring various quantities of a rotating body, and more particularly to various kinds of rotating bodies by transmitting and receiving optical signals in a non-contact manner between a rotating side and a fixed side. The present invention relates to a rotating body various quantity transmitting / receiving device capable of measuring quantity.

[0002]

2. Description of the Related Art Generally, a rotating body rotatably provided on a fixed side includes a rotor of a synchronous machine or a rotating electric machine. It is necessary to accurately measure the amount (field voltage of synchronous machine, field current, embedded temperature of rotor winding of rotating electric machine, shaft torque, etc.).

Conventionally, as a transmitter / receiver for measuring various amounts of a rotating body on a fixed side and a rotating side in a non-contact manner, one using an FM oscillator is known.

A rotating body various quantity transmitting / receiving device using this FM oscillator includes a rotating body various quantity converter and a rotating side FM signal processing unit electrically connected to this rotating body various quantity converter. On the other hand, the fixed side FM signal processing unit is provided on the fixed side.

In the rotating body various quantity transmitting / receiving apparatus using the FM transmitter, various amounts of the rotating body are converted into electric signals by the rotating body various quantity converter and sent to the rotating side FM signal processing unit. This rotating-side FM signal processing unit FM-modulates various quantities of the rotating body converted into the electric signal, and the FM is transmitted from the transmitting antenna.
Emit radio waves. The fixed-side FM signal processing unit receives and demodulates the FM radio wave from the rotating-side FM signal processing unit by the receiving antenna and demodulates various data of the rotating body to an external display device and a CPU (central processing unit). I am sending it out.

As another rotating body quantity transmitting / receiving apparatus, a rotating body quantity converter and a rotating side digital signal processing unit electrically connected to the rotating body quantity converter are provided in the rotating body. On the other hand, a rotating body various quantity transmission / reception device configured by providing a fixed side signal processing unit on the fixed side and interposing an optical transmitter / receiver (optical element) between the rotating side digital signal processing unit and the fixed side signal processing unit Are known.

The optical transmitter / receiver comprises a rotating side light emitter and a fixed side light receiver. The rotating side light emitter is located at the center of the axial end of the rotating body, and the fixed side light receiver faces the rotating side light emitter. Are provided on the fixed side with a predetermined gap, and signals are transmitted and received by light.

In the rotating body various quantity transmitting / receiving device having the optical transmitter / receiver, various amounts of the rotating body are measured by the rotating body various quantity converter and converted into an electric signal, and the electric signal is sent to the rotating side digital signal processing unit. Output. The rotating side digital signal processing unit digitally converts the electric signal input from the rotating body quantity converter and outputs it to the rotating side light emitter of the optical transceiver.

The rotating side light emitter converts a digital signal into an optical signal, and transmits this optical signal from the center of the axial end of the rotating body toward the fixed side light receiver. The fixed-side photoreceptor receives the optical signal and outputs it to the fixed-side signal processing unit. The fixed-side signal processing unit converts an optical signal output from the fixed-side photoconductor into an electric signal and outputs various amounts of the rotating body to an external display device and a CPU (central processing unit).

Furthermore, Japanese Patent Application No. 3-261 filed by the present applicant
As described in Japanese Patent No. 654, a plurality of optical transmitters / receivers (optical elements) are arranged along the axial direction on the peripheral surface of a rotating body, and the BCD serial (binary coded decimal) is used to fix the rotating side to the fixed side. There is a rotating body various quantity transmitting / receiving device that transmits one digit at a time.

[0011]

Conventionally, since the rotating body various amount measuring device measures various amounts of the rotating body and transmits them to the fixed side, the rotating side and the fixed side are not brought into contact with each other as described above. FM
Data on the rotating side is sent to the fixed side by using radio waves or optical signals.

However, in the device using the FM transmitter, there is a limit to the number of transmission channels in one antenna, and the maximum number of channels that can be simultaneously transmitted and received is about 8 channels in order to avoid interference. Further, in principle, there is a problem that it is easily affected by noise.

Further, although the rotating body various quantity measuring device for transmitting the digitally converted signal to the fixed side by the optical element provided at the center of the axial end of the rotating body has an excellent data transfer rate, Since the optical element must be provided at the axial end, it may be unusable depending on the structure of the axial end of the rotating body, or the applicable range is limited by the structure of the measured object. is there.

Further, a plurality of optical transmitters / receivers (optical elements) are arranged on the peripheral surface of the rotating body along the axial direction, and the data converted into BCD serial is transmitted from the rotating side to the fixed side one digit at a time. The body quantity transmitting / receiving device has a problem that it takes a long time for data transmission when transmitting multi-channel data because the number of optical elements increases and the mounting space may be restricted.

The present invention has been made in consideration of the above-mentioned circumstances. It is excellent in noise resistance, can be applied to a wide range of structures depending on the structure of the object to be measured, and can transmit multi-channel data. It is an object of the present invention to provide a rotating body various quantity transmitting / receiving device having improved power consumption.

[0016]

In order to solve the above-mentioned problems, a rotating body various quantity transmitting / receiving apparatus according to the present invention is attached to a peripheral surface of a rotating body and measures various amounts of the rotating body to obtain an electric signal. The rotary body various quantity converter for converting into, and the rotary body various quantity converter connected to the rotary body arranged in the axial direction of the peripheral surface, the electric signal is converted into a digital signal, the digital signal A rotation-side transmission unit including a first optical element for converting into various quantity measurement optical signals and transmitting the signal, and a rotation-side transmission unit, which is arranged with a space between the rotation-side transmission unit and faces the first optical element. And a fixed-side receiving unit for converting the variable-quantity measuring optical signal into a digital signal, and a digital signal input from the fixed-side optical element unit. With a fixed-side processing unit for numerically processing Provided, in which the first optical element of the rotation-side transmission unit in the circumferential direction of the rotating body, and selectively arranging a plurality of the fixed-side receiving unit in the circumferential direction of the fixed side.

[0017]

In the present invention having the above-mentioned structure, various amounts of the rotating body are measured by the rotating body various amount converter and converted into an electric signal, and this electric signal is converted into a digital signal by the rotating side transmission unit. At the same time, the digital signal is converted into various measurement optical signals and transmitted from the first optical element.

The transmitted various quantity measurement optical signals are received by the second optical element of the fixed side reception unit arranged in the circumferential direction, and the various quantity measurement data received by the rotation side transmission unit are processed by the fixed side. Numerical processing is performed by the unit to measure various quantities of the rotating body.

On the other hand, when a plurality of rotation side transmission units are arranged in the circumferential direction of the rotating body, various quantity measurement optical signals can be continuously transmitted.

Therefore, by disposing a plurality of fixed side receiving units in the circumferential direction and a plurality of rotating side transmitting units in the circumferential direction of the rotating body, it is possible to transmit and receive a plurality of channel data during one rotation cycle. It will be possible.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a rotating body quantity transmitting / receiving apparatus according to the present invention will be described below with reference to FIGS.

FIG. 1 is a side view schematically showing a first embodiment of a rotating body quantity transmitting / receiving apparatus according to the present invention, and FIG. 2 is a schematic configuration diagram showing a cross section of the rotating body quantity transmitting / receiving apparatus of FIG. 3 is shown in FIG.
3 is a time chart showing an example of the data communication of FIG.

Rotating body (rotating side) 1 as an object to be measured
Is rotatably provided with respect to the fixed side 2, as shown in FIG. Examples of the rotating body 1 include a synchronous machine and a rotor of a rotating electric machine. To ensure proper operation of synchronous machines and rotating electrical machines,
Various quantities of the rotating body 1 (for example, field voltage, field current of the synchronous machine,
It is necessary to accurately measure the rotor winding embedding temperature, shaft torque, etc. of the rotating electric machine.

As shown in FIG. 1, on the outer peripheral surface of the rotary body 1, a rotary body various quantity converter 3 and a rotary side transmission unit 4 are detachably provided, and these are electrically connected. It The rotating body various quantity converter 3 measures various quantities of the rotating body 1 and outputs various quantity measuring electric signals, and sends these various quantity measuring electric signals to the rotation side transmitting unit 4.

The rotating side transmission unit 4 digitally converts various quantity measurement electric signals input from the rotating body various quantity converter 3 and also converts various quantity measurement digital signals into various quantity measurement optical signals and transmits them. To do.

The rotation side transmission unit 4 converts the input digital signal into an optical signal and transmits the optical signal to the outside by light emission, and a light emitting element (a light emitting diode or a semiconductor laser) 5a and a light emitting element. Light receiving element (photodiode or avalanche photodiode) that receives the transmitted optical signal and outputs it as an electrical signal
5b and a first optical element 5 arranged in parallel in the axial direction of the rotating body 1.
Have.

On the other hand, on the fixed side 2, as shown in FIG. 2, four fixed side receiving units 6 are arranged so as to be removable from the rotating side transmitting unit 4 at predetermined intervals in the circumferential direction with a gap. It

These fixed-side receiving units 6 convert the transmitted optical signal into a digital signal,
A light emitting element (a light emitting diode, a semiconductor laser, or the like) 7a that transmits an optical signal to the outside by light emission, and a light receiving element 7b that receives the optical signal transmitted from the light emitting element 5a of the first optical element 5 and outputs it as an electric signal. And a second optical element 7 composed of

Then, the fixed-side receiving unit 6 outputs the converted amount measurement digital signal to the fixed-side processing unit 8. Here, the selection of the number of fixed-side receiving units 6 is determined according to the required transmission / reception speed.

The fixed-side processing unit 8 numerically converts the various-quantity-measurement digital signals input from the fixed-side receiving unit 6 and outputs the digital signals to an external display device (not shown) or CPU (central processing unit).

Further, a solar cell 9 is attached to the end of the rotating body 1 in the axial direction, and the stationary portion light source 10 is attached to the solar cell 9.
Driving power is supplied to the rotating body various quantity converter 3 and the rotating side transmitting unit 4 by irradiating light from the above. As a result, it is possible to provide a drive power supply that is non-contact and easy to handle.

Next, the operation of this embodiment will be described.

First, the rotating body quantities are converted by the rotating body quantity converter 3, and the signal of the light emitting element 7a of the fixed side receiving unit 6 which is always turned on during use is converted by the light receiving element 5b of the rotating side transmitting unit 4. Receiving this, the rotation side transmission unit 4 samples various quantities of the rotating body 1 by using this as a trigger signal, outputs various quantity measurement electric signals, performs digital conversion processing on these various quantity measurement electric signals, and outputs various quantity measurement digital signals. It is converted into optical signals for measuring various quantities and transmitted to each fixed-side receiving unit 6 as a bit serial signal.

Each fixed-side receiving unit 6 receives the optical signal transmitted from the light-emitting element 5a of the rotary-side transmitting unit 4 by the light-receiving element 7b, converts it into a digital signal, and processes various amount measurement digital signals into the fixed-side processing unit. Output to 8.
Next, in the fixed-side processing unit 8, the various-quantity measurement digital signals are parallelized and logically ORed to be processed. A series of these time charts is shown in FIG.

The various quantity measurement optical signal of the rotation side transmission unit 4 also includes address data for discriminating which channel is the various quantity measurement data. Further, the transmission and reception of the optical signals for measuring various quantities are performed while the first optical element 5 and the second optical element 7 are opposed to each other, so that
Can be individual. And the rotation side transmission unit 4
Updates the channel each time it receives the above trigger signal.

By the way, when there is one fixed-side receiving unit 6, only data for one channel can be transmitted in one rotation cycle, and when there are multiple channels, the data transfer speed becomes slower or the rotation speed is low. However, in this embodiment, a plurality of fixed-side receiving units 6 are arranged in the circumferential direction, and the signals received by each unit are ORed by the fixed-side processing unit 8 and processed. Therefore, the data transmission speed is improved by the number of the fixed reception units 6 arranged in the circumferential direction.

In the present embodiment, the first optical element 5 has a total of two light-receiving elements 5b for receiving the trigger signal and the light-emitting element 5a for transmitting the optical signal to the outside. The rotation side transmission unit 4 attached to the body 1 can be downsized.

Further, in the above-mentioned embodiment, when the driving power source of the rotating side transmitting unit 4 is a battery, the fixed side receiving unit 6 is provided in order to suppress battery consumption as much as possible.
The power supply circuit on the rotation side may be opened / closed based on the optical signal from. In this case, if the ON signal element and the OFF signal element are separately provided, it is not necessary to be influenced by the rotation cycle.

FIG. 4 shows a second embodiment of the rotating body amount transmitting / receiving apparatus according to the present invention. The same parts as those in the first embodiment will be designated by the same reference numerals. In the second embodiment, the light emitting elements 5a of the first optical element 5 that transmits various measurement optical signals are continuously arranged in the circumferential direction of the rotating body 1. In this case, the fixed side receiving unit 6 may be one. According to the second embodiment, the rotation side transmission unit 4 can continuously transmit the channel address and the channel data, and the data transmission / reception speed can be dramatically increased.

In this embodiment, the light emitting elements 5a may be arranged so that the light emitting angles of the adjacent light emitting elements 5a overlap each other, even if the light emitting elements 5a are not arranged in a row. The rest of the configuration and operation are the same as in the first embodiment, so a description thereof will be omitted.

[0041]

As described above, the rotating body quantity transmitting / receiving device according to the present invention is mounted on the peripheral surface of a rotating body and measures various quantities of the rotating body and converts them into electric signals. Quantity converter and connected to this rotating body quantity converter,
A rotation side transmission unit that is arranged in the axial direction of the peripheral surface of the rotating body, and that includes a first optical element that converts the electrical signal into a digital signal, converts the digital signal into various quantity measurement optical signals, and transmits the optical signals. And a second optical element that is arranged with a gap with respect to the rotation side transmission unit and faces the first optical element and that can transmit and receive the various quantity measurement optical signals. A fixed-side receiving unit that converts an optical signal into a digital signal, and a fixed-side processing unit that numerically processes the digital signal input from the fixed-side optical element unit,
By selectively arranging a plurality of the first optical elements of the rotating side transmitting unit in the circumferential direction of the rotating body and selectively fixing the fixed side receiving unit in the fixed side circumferential direction, various amounts of the rotating body can be adjusted. By transmitting and receiving, it is possible to accurately measure the rotating side and the fixed side in a non-contact state, so that it is possible to improve the measurement accuracy of various amounts of the rotating body without being affected by noise, and to use the multi-channel rotating body. The measurement range of various quantities can be expanded.

Further, by arranging a plurality of rotating side transmitting units or fixed side receiving units in the circumferential direction so that various quantity measuring optical signals can be transmitted / received, the transmitting / receiving speed of rotating body various quantity data can be increased.

Further, since the rotating body quantity converter and the rotating side transmitting unit are arranged on the peripheral surface of the rotating body, the range of the rotating body which can be measured without being restricted by the structure of the rotating body as the object to be measured. Can be expanded.

[Brief description of drawings]

FIG. 1 is a sectional view schematically showing a first embodiment of a rotating body various quantity transmitting / receiving apparatus according to the present invention.

FIG. 2 is a schematic configuration diagram showing a cross section of the rotating body various quantity transmitting / receiving apparatus of FIG.

FIG. 3 is a time chart showing an example of the data communication of FIG.

FIG. 4 is a schematic configuration diagram showing a second embodiment of a rotating body various quantity transmitting / receiving apparatus according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 rotator 2 fixed side 3 rotator various amount converter 4 rotation side signal processing unit 5 1st optical element 5a light emitting element 5b light receiving element 6 fixed side receiving unit 7 2nd optical element 7a light emitting element 7b light receiving element 8 fixed Side signal processing unit 9 Solar cell 10 Stationary light source

Claims (1)

[Claims] 1. A rotary body quantity converter mounted on the peripheral surface of a rotary body, for measuring various quantities of the rotary body and converting the quantities into an electric signal, and the rotary body quantity converter connected to the rotary body quantity converter. A rotation side transmission unit which is arranged in the axial direction of the peripheral surface of the rotator, converts the electric signal into a digital signal, converts the digital signal into various quantity measurement optical signals, and transmits the optical signals; , A second optical element that is arranged with a gap with respect to the rotation side transmission unit and that faces the first optical element and is capable of transmitting and receiving the various quantity measurement optical signals. A fixed-side receiving unit that converts a signal into a digital signal and a fixed-side processing unit that numerically processes the digital signal input from the fixed-side optical element unit are provided, and the fixed-side processing unit of the rotating-side transmitting unit is arranged in the circumferential direction of the rotating body. Set the first optical element to the fixed side in the circumferential direction. 2. A rotating body various quantity transmitting / receiving apparatus, wherein a plurality of the fixed side receiving units are selectively arranged in the.