JPH04264267A - Measuring apparatus for physical amount of high potential part - Google Patents

Abstract

PURPOSE:To avoid danger accompanying deterioration of a transmission system without losing operativeness at the time of measuring voltage of a transmission line by using an insulating rod. CONSTITUTION:A freely stretchable cylindrical insulating rod 1 is used. A hollow part inside the insulating rod 1 provides a spatial transmission path 11 for transmitting supersonic waves. The insulating rod 1 is equipped with a pair of transmitter-receiver comprising a transmitter 12 and a receiver 13. The transmitter 12 is provided at the tip of the insulating rod, has a sensor 3 for detecting voltage when it is in contact with a transmission line, converts the detected voltage into supersonic waves and transmits them in the spatial transmission path 11 inside the insulating rod 1. The receiver 13 is provided at the base of the insulating rod 1 and receives the supersonic waves transmitted from the transmitter 12 through the spatial transmission path 11. Since a transmission system is formed inside the insulating rod 1 to eliminate a transmission system outside the insulating rod, deterioration in insulation can be remarkably reduced.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a measuring device for measuring physical quantities of high potential parts such as power transmission lines and substation busbars.
In particular, the present invention relates to a measuring device that converts a physical quantity at a high potential section into a sound wave signal and transmits the signal to a ground potential section.

0002

[Prior Art] Generally, when temporarily measuring physical quantities such as voltage, current, and temperature in high-voltage sections such as power transmission lines and substation busbars, long insulating rods are used, and a long insulating rod is used. Bring the sensor close to or in contact with a high voltage part. A high-voltage measuring device including a sensor is attached to the insulating rod to measure physical quantities.

Conventionally, this measuring device includes an optical output type sensor supported at the tip of an insulating rod, which detects voltage, current, temperature, etc. and converts it into an optical signal, and a sensor installed along the insulating rod. It mainly consists of a highly insulated optical fiber that transmits optical information corresponding to the physical quantity of the high voltage section obtained by this sensor to the ground potential section at the other end of the insulating rod. Optical fibers are attached along the outside of the insulating rod, and can be attached either by hanging directly from the sensor or by being fixed to the insulating rod every few meters.

0004

By the way, when the sensor approaches and contacts the high voltage section, the insulating rod or the optical fiber may come into contact with the high voltage section by mistake. If a flash fault occurs as a result, not only will it result in a power failure, but it will also endanger the operator's life. Therefore, measuring instruments for high voltage sections are required to have high electrical insulation and ease of operation.

[0005] However, in the above-mentioned conventional measuring instruments, the optical fiber is particularly susceptible to flash faults. This is because the optical fiber is attached along the outside of the insulating rod and is exposed to the outside, so the optical fiber is easily contaminated and the insulation properties of the optical fiber deteriorate with repeated use. Optical fiber typically deteriorates more and much faster than insulated rods.

On the other hand, when an optical fiber is fixed to an insulating rod, there is a drawback that it is difficult to make the insulating rod telescopic due to the characteristics of the optical fiber, resulting in poor operability. On the other hand, if the optical fiber were allowed to hang down from the sensor, the optical fiber would get in the way, making it difficult to move the sensor.

An object of the present invention is to solve the problems of the prior art described above by using sound waves, to reliably transmit physical information of high potential parts, and to create a high-voltage system that is safe and easy to operate. An object of the present invention is to provide a physical quantity measuring device for a potential section.

Another object of the present invention is to provide a physical quantity measuring device for a high-potential section that is capable of two-way communication using sound waves.

[0009]

[Means for Solving the Problems] A physical quantity measuring device for a high potential section according to the present invention has a telescopic insulating rod. The insulating rod is hollow, and the space is used as a spatial transmission path for transmitting sound waves.

[0010] The insulating bar is equipped with a set of transceivers. The transmitter is provided at the tip of the insulating rod, and has a sensor that detects a physical quantity of the high potential part when it approaches or contacts the high potential part, and sends out a sound wave signal corresponding to the physical quantity to the spatial transmission path. Further, the receiver is provided at the base end of the insulating rod, and receives the sound waves transmitted from the transmitter through the spatial transmission path. In this case, another set of transceivers may be provided on the insulating rod in order to make the transmission direction bidirectional. The second receiver is provided at the tip of the insulating rod that approaches or contacts the high potential part, the second transmitter is provided at the base end of the insulating rod, and has a sensor that detects a physical quantity applied from the base end, A sound wave signal corresponding to the physical quantity is sent to the second receiver.

[0011] As the sound waves used in the present invention, ultrasonic waves are preferable from the viewpoint of reliability.

0012

[Operation] When the transmitter sensor installed at the tip of the insulating rod approaches or contacts a high potential part, the physical quantity of the high potential part is detected by the transmitter sensor, and a sound wave signal of an amount proportional to the detected amount is generated. converted. The sound wave signal passes from the transmitter through a spatial transmission path within the insulating rod, and is received by a receiver provided at the base end of the insulating rod. Here, it is converted into a physical quantity required at a subsequent stage, for example, an electrical signal, and the physical quantity of the high potential part is measured.

[0013] In this way, since there is no transmission system outside the insulating rod, there is no risk of deterioration of the transmission system due to external dirt, so when the sensor of the transmitter approaches or contacts a high voltage part, Even if the insulating rod accidentally comes into contact with a high-voltage part, flash faults due to the transmission system will not occur, there will be no power outage, and there will be no danger to the operator's life.

Furthermore, since the insulating rod is hollow and its spatial transmission path is used as a sound wave transmission path, there is no problem even if the insulating rod is extendable, and therefore operability and mobility are not impaired.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a voltage measuring device as an example of a physical quantity measuring device for a high potential section according to the present invention. In Figure 1, 1
is a cylindrical insulating rod with very high insulation resistance made of synthetic resin, etc., and it can be expanded and contracted in multiple stages (in this case, three stages) by slidingly fitting multiple pipes 1a to 1c with different diameters into each other. It is formed freely. In this insulating rod 1, the innermost pipe 1
To prevent the innermost pipe 1c from falling off even when the innermost pipe 1c is pulled out and extended from the intermediate pipe 1b and the outermost pipe 1a, stoppers are provided on the outermost pipe 1a and the middle pipe 1b, respectively. 2,2 is attached.

A receiver 1 is installed at one end of the insulating rod 1, that is, at the protruding end of the innermost pipe 1c which becomes the most tip when extended.
2 is installed. The receiver 12 includes a sensor 3 that detects voltage, a contact hook 4 attached to the sensor 3 and extending in the direction of expansion and contraction of the insulating rod 1, and the sensor 3.
The main component is a sounding element 5 which is electrically connected to the sensor and converts the sensor output into sound waves. Contact hook 4
When hooked onto a power line (not shown), etc.
The voltage is detected by the sensor 3, a sound wave corresponding to the voltage is emitted from the sound generating element 5, and the sound is emitted to the spatial transmission path 11 within the insulating rod 1. The sensor 3 is an induced voltage detection circuit that detects voltage by electromagnetic induction;
As the sound generating element 5, an ultrasonic vibrator that vibrates in proportion to the amplitude of the voltage and emits ultrasonic waves is suitable.

The other end of the insulating rod 1, that is, the pipe 1b,
A receiver 13 is attached to the base end of the outermost pipe 1a from which the pipe 1c is not pulled out. This receiver 13 is arranged to face the sounding element 6 within the spatial transmission path 11 of the insulating rod 1, and includes a sound receiving element 7 that converts sound into an electrical signal, and a sound receiving element 7 that is based on the electrical signal from the sound receiving element 7. and a calculation display section 6 that calculates and displays the voltage value of the high potential section. Preferably, the sound receiving element 7 is an ultrasonic transducer, and the calculation display section 6 is a microcomputer, liquid crystal display, or the like.

Now, standing at the ground potential, the outermost pipe 1
When the middle pipe 1b and the innermost pipe 1c are pulled out from a, the insulating rod 1 is extended, and the contact hook 4 is brought into contact with a charged object such as a power transmission line, the voltage of the charged object is detected by the sensor 3, and the voltage of the charged object is detected by the sensor 3. A sound wave signal with a corresponding pulse width is output from the sound generating element 5. The sound wave signal sent out from the sound generating element 5 propagates through the spatial transmission path 11 within the insulating rod 1 and reaches the sound receiving element 7.
reach. Then, it is converted into an electrical signal, and this electrical signal is converted into the voltage of the charging section by the arithmetic display section 6 and then displayed.

As described above, in this embodiment, since the internal space of the insulating rod is used as a sound wave transmission path, there is no problem even if it can be expanded and contracted, and there is no need to provide an external transmission system, so deterioration of insulation properties can be avoided. can be reduced.

FIG. 2 shows a modification of the present invention that enables bidirectional communication. When the above-mentioned sound generating element 5 and sound receiving element 7 are respectively used as the first sound generating element 5 and the second sound receiving element 7, in addition to these one set of transmitter/receiver, the second sound generating element 8 and the second sound receiving element 7 are used. Another set of sound receiving elements 9 is provided, and the space inside the insulating rod 1 is used as a bidirectional data transmission path. That is, a second sound generating element 8 is provided at the base end of the insulating rod 1, and a second sound receiving element 9 is provided at the distal end of the insulating section 1, facing the second sound generating element 8. The second sound generating element 8 receives a voltage signal applied from, for example, the calculation display unit 6, and emits a sound wave according to the voltage value. As a result, through the second sound generating element 8, the space inside the insulating rod, and the second sound receiving element 9,
This allows data to be spatially transmitted from the proximal end to the distal end. The sound waves received by the second sound receiving element 9 may be emitted as they are, or the sensor 3 may also be used as a forcer and guided thereto to output a guidance signal. For example, it can be used to control control equipment installed on a steel tower.

In the above embodiment, the voltage measuring device was described, but it goes without saying that the present invention can also be applied to current and temperature measuring devices by simply changing the sensor.

[0023]

[Effects of the Invention] According to the present invention, the following effects are achieved.

(1) According to the physical quantity measuring device for a high potential part according to claim 1, a transmitter having a sensor for converting a physical quantity into sound is provided at the tip of a hollow insulating rod, and a receiver is provided at the base end of the insulating rod. Since the space inside the insulating rod is used as a sound data transmission path, electrical insulation is improved compared to the conventional case where the optical fiber outside the insulating rod is used as a data transmission path. The possibility of deterioration can be significantly reduced.

Furthermore, by using the space within the insulating rod as a data transmission path, it is possible to eliminate the conventionally used optical fiber, thereby reducing manufacturing costs. Even if the insulating rod is made telescoping, its telescoping operation is not hindered, and the operation of moving the sensor becomes easy. Furthermore, the space is small and easy to store when not in use.

(2) According to the physical quantity measuring device for a high potential section according to the second aspect, since another set of transmitters/receivers is provided, two-way communication can be performed, and the usability is greatly improved.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view showing an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view showing another embodiment of the present invention.

[Explanation of symbols]

1 Hollow insulation rod 2 Stopper 3 Sensor 4 Contact hook 5.Sounding element 6 Calculation display section 7 Sound receiving element 8 Second sounding element 9 Second sound receiving element 11 Spatial transmission line 12 Transmitter 13 Receiver

Claims (2)

[Claims] Claim 1: A hollow insulating rod that is expandable and contractible and has a spatial transmission path for transmitting sound waves inside, and a physical quantity of the high potential portion provided at the tip of the insulating rod when approaching or touching the high potential portion. a transmitter that has a sensor that detects the physical quantity and sends out a sound wave signal corresponding to the physical quantity to the spatial transmission path; 1. A physical quantity measuring device for a high potential section, comprising: a receiver for receiving a sound wave signal; and a set of transceivers. 2. A second transmitter provided at the proximal end of the insulating rod and having a sensor for detecting a physical quantity applied from the proximal end and transmitting a sound wave signal corresponding to the physical quantity; The physical quantity measuring device for a high potential section according to claim 1, further comprising another set of transceivers including a second receiver that receives the sound wave signal from the second transmitter. .