JP2516110Y2 - Measuring instrument for high potential parts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a measuring instrument for a high-potential part, and particularly to a measurement for converting a physical quantity of the high-potential part into an optical signal once and transmitting it to a ground potential part. It is related to vessels.

[Prior Art] Generally, when temporarily measuring the voltage, current, temperature, etc. of a high potential part such as a transmission line or a substation bus, a measuring device for the high potential part is used. Such measuring instruments are conventionally
An optical output type sensor is supported on an insulating rod, and the sensor is brought close to or in contact with a high-potential part to obtain optical information corresponding to the physical quantity of the high-voltage part, and the optical information is sent to the ground via a highly-insulated optical fiber. It can be transmitted to the electric potential part.

[Problems to be solved by the invention] By the way, when a sensor approaches or contacts a high-voltage part, an insulating rod or an optical fiber contacts the high-voltage part, which causes a flashover, which causes a power failure. Not only does it affect the life of the operator. Therefore, the measuring instrument for the high potential part is required to have high electrical insulation and easy operation.

However, in the conventional measuring device, the optical fiber is located outside the insulating rod, and the insulating rod is stopped every few meters.
It was hanging from the sensor. Therefore, the optical fiber is liable to be contaminated, and the withstand voltage characteristic of the optical fiber may deteriorate with repeated use, which is a danger.

Also, especially when fixing the optical fiber to the insulating rod,
There is a problem that it is difficult to make the insulating rod telescopic, and the operation is inconvenient. However, if the optical fiber is dropped from the sensor as it is, there is a problem that the operation of moving the sensor is difficult.

It is an object of the present invention to solve the above-mentioned problems of the prior art, and to provide a measuring device for a high potential part which can safely transmit optical information from the high potential part and is easy to operate.

[Means for Solving the Problems] In order to achieve the above object, a measuring instrument for a high-potential part of the present invention is a tubular insulating rod that is expandable and contractable, and is provided at one end of the insulating rod. A sensor that outputs an optical signal equivalent to the physical quantity of the high-potential part when approaching or contacting the part, a light-emitting element provided in the sensor and transmitting the optical signal of the sensor, and a sensor provided at the other end of the insulating rod. From the sensor transmitted through the space inside the insulating rod while being reflected on the inner surface of the insulating rod. In a measuring device for a high-potential part, which receives light at a measuring part, the first sensor for transmitting and receiving light through the space inside the insulating rod while the sensor and the measuring part are reflected by the inner surface of the insulating rod. A second light emitting / receiving element pair is provided in addition to the light receiving element pair. The light receiving element of the element pair is provided in the measuring section, and the light receiving element is provided in the sensor, and the control signal from the measuring section is transmitted through the space inside the insulating rod while being reflected on the inner surface of the insulating rod. Is configured to control.

[Operation] According to the present invention, since the optical transmission line for transmitting the light from the sensor to the ground potential portion is the space itself inside the insulating rod,
The optical fiber used in the past can be eliminated, the manufacturing cost can be reduced, and the measurement operation can always be performed safely without deteriorating the electrical insulation property due to dirt or the like. Also, since the sensor and the measuring unit are always optically coupled regardless of the expansion and contraction of the insulating rod, the insulating rod can be made expandable and contractable, and the sensor can be easily moved. It is possible to control the sensor in the high potential part from.

[Embodiment] An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a voltage measuring device as an embodiment of the measuring device of the present invention.

In FIG. 1, reference numeral 1 denotes an insulating rod, which is slidably fitted in a plurality of pipes 1a to 1c having different diameters so as to be slidable in a plurality of stages, here three stages. In this insulating rod 1, even when the inner pipe is pulled out from the outer pipe and extended, the inner pipe is prevented from coming off, so that the outermost pipe 1a and the intermediate pipe 1b have stoppers for preventing the inner pipe from coming off. 2 is attached.

A sensor 3 is attached to one end of the insulating rod 1, that is, the protruding end of the innermost pipe 1c which is the most distal end when extended. The sensor 3 mainly includes a contact hook 4 extending in the expansion / contraction direction of the insulating rod 1 and a light emitting element 5 electrically connected to the hook 4 to emit light. When hooked on an electric wire (not shown) or the like, the light emitting element 5 emits light corresponding to the voltage value, and the light is emitted to the space A in the insulating rod 1.

At the other end of the insulating rod 1, that is, at the base end of the outermost pipe 1a from which the pipes 1b and 1c are not drawn out, a display 6 as a measuring unit is attached. The display unit 6 includes a light receiving element 7 arranged to face the light emitting element 5 in the space A, and the light receiving element 7 thereof.
And a calculation display section (not shown) for calculating and displaying the voltage value of the high-potential section based on the electric signal from.

Now, when the inner pipes 1b, 1c are pulled out from the outer pipes 1a, 1b, the insulating rod 1 is extended, and the contact hooks 4 are brought into contact with a power supply unit such as a power transmission line (not shown), An optical signal having an intensity corresponding to a physical quantity (voltage value here) is output from the light emitting element 5. The light emitted from the light emitting element 5 propagates through the space A in the insulating rod 1 while being reflected by the inner surface of the insulating rod 1, and reaches the light receiving element 7. Then, there, it is converted into an electric signal, and this electric signal is displayed after being converted into the voltage of the power application section by the calculation display section.

In this way, the sensor 3 is attached to one end of the insulating rod 1 on the hollow cylinder.
By providing the display unit 6 at the other end, the space A in the insulating rod 1
Is used as an optical transmission line. Therefore, it is possible to reduce the possibility that the electrical insulation is deteriorated as much as possible, as compared with the conventional case where the optical fiber outside the insulating rod is used as the optical transmission line.

Therefore, the data from the high voltage section can always be safely transmitted to the ground potential section.

Further, by using the space A in the insulating rod 1 as an optical transmission line,
Since the conventionally used optical fiber can be eliminated, the manufacturing cost can be reduced, and even if the insulating rod 1 is telescopic, the operation of moving the sensor 3 is easy without obstructing the telescopic operation. Become.

In addition, since the insulating rod 1 can be expanded and contracted in this manner, there is an advantage that it can be easily stored when not in use and the storage area is small.

Further, in this embodiment, in addition to the light emitting element 5 and the light receiving element 7 (first light emitting and receiving element pair) of the voltage measuring device, the second light emitting element 8 and the second light receiving element 9 (the second light emitting and receiving element) are used. versus)
Is provided and the space A is used as a bidirectional optical transmission path. That is, the second light emitting element 8 is provided on the display unit 6.
The sensor 3 is provided with a second light receiving element 9 facing the element 8 so that an optical signal can be spatially transmitted through the second light emitting element 8, the insulating rod 1 inner space A, and the second light emitting element 9. It is the one. Accordingly, the sensor 3 to the display unit 6 described above
In addition to the data transmission to the sensor 3, a control signal can be transmitted from the display section 6 to the sensor 3, and the sensor 3 can be controlled at the ground potential section.

[Effect of the Invention] According to the present invention required above, the following excellent effects are exhibited.

(1) A sensor that outputs an optical signal corresponding to the physical quantity of the high-potential portion is provided at one end of an insulating rod that is formed in a tubular shape and is expandable, and a measuring portion that receives light from the sensor is provided at the other end. By using the space inside the insulating rod as an optical transmission line,
The manufacturing cost can be reduced, the optical information from the high-voltage unit can be safely transmitted, the operation of moving the sensor can be easily performed, and the first signal transmitting the optical signal from the sensor to the measuring unit can be performed. In addition to the light receiving element pair, by providing a second light emitting and receiving element pair that transmits an optical signal from the measuring unit to the sensor, the sensor located in the ground potential portion to the high potential portion can be controlled.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an embodiment of the present invention. In the figure, 1 is an insulating rod, 3 is a sensor, 5 is a light emitting element, 6 is a display section (measurement section), 7 is a light receiving element, 8 is a second light emitting element,
9 is the second light emitting element, A is the space inside the insulating rod (optical transmission line)
Is.

Claims (1)

(57) [Scope of utility model registration request] 1. An expandable telescopic cylindrical insulating rod, and a sensor which is provided at one end of the insulating rod and which outputs an optical signal corresponding to a physical quantity of the high potential portion when approaching or in contact with the high potential portion,
The sensor is provided with a light emitting element that transmits an optical signal of the sensor, a measuring section provided at the other end of the insulating rod, and a light receiving element provided in the measuring section for receiving the optical signal of the sensor. , In a measuring instrument for a high potential part that receives light from the sensor transmitted through the space inside the insulating rod while being reflected on the inner surface of the insulating rod, in the measuring device for a high potential part, A second light emitting / receiving element pair in addition to the first light emitting / receiving element pair that transmits / receives light through the space inside the insulating rod while reflecting on the inner surface of the insulating rod. The pair of light receiving elements is provided in the measuring section, and the light receiving element is provided in the sensor, and is configured to transmit the signal from the measuring section through the space inside the insulating rod while being reflected on the inner surface of the insulating rod. A measuring instrument for a high potential part, which is characterized in that