JPH0656776U - Globe type electric field sensor - Google Patents

Abstract

(57) [Abstract] [Purpose] A glove-type electric field suitable for detecting the disconnection position of an electric wire, which can easily detect the presence or absence of the electric field of an object installed in a place where it is difficult to approach a conventional probe. Providing a sensor. [Structure] When detecting an electric field, an operator connects a lead wire pulled out from an electric field detection electrode 2 to an electric field meter 5 and puts on the glove 1 and puts a finger portion of the glove 1 on an electric field detection object. Bring them closer. For example, when detecting the wire breakage position, the globe is moved along the wire and the wire breakage position is detected by the presence or absence of the detected electric field. Since the electric field detection electrode 2 is provided on the finger portion of the glove, it is possible to detect an electric field in a fine place where the conventional electric field detection probe cannot be inserted. For example, it is possible to easily detect the electric field of the core wire of the multi-core cable. You can

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a glove type electric field sensor, and more particularly, the present invention relates to a glove type electric field sensor suitable for detecting a disconnection position of an electric wire or the like.

[0002]

[Prior art]

 The detection of the breakage point of the electric wire is usually performed by using a disc-shaped or rod-shaped electric field sensor called a probe. FIG. 3 is a diagram showing a conventional method for detecting a broken point using the above-mentioned probe. In the figure, 21 is a power source, 22 is an electric wire, 23, 23 'is an electrometer, 23a, 23a' is a probe, and F is a broken point.

In the method for detecting the breakage point of the electric wire 22, as shown in FIG. 1, the power source 21 is connected to one end of the broken electric wire 22 to apply a voltage. When a voltage is applied to the electric wire 22, an electric field E is generated in the part where the voltage is applied (power supply side from the disconnection point F), and no electric field is generated in the part where the voltage is not applied (far side from the disconnection point F). . That is, in FIG. 3, the electric field is detected by the electric field meter 23, but cannot be detected by the electric field sensor 23 '.

Therefore, the electric field sensor 23 traces the electric field along the electric wire 22 for the presence or absence of an electric field, and finds a place where the electric field changes (Yes → No, or No → Yes), thereby finding a broken point of the electric wire. be able to. This method is effective even when only the wire conductor is broken and the insulation coating is sound.

[0005]

[Problems to be solved by the device]

 By the way, the above-mentioned method for detecting a broken point is effective when the object to be explored is laid in a visible place, or when there is no obstacle that hinders the exploration. If there is an obstacle around the object to be detected or a place where a stiff probe cannot be inserted, it becomes difficult to detect the electric field.

For example, as shown in FIG. 4A, when there is no obstacle around the electric wire 31 to be detected for disconnection and the probe 23 a of the electrometer 23 can freely approach the electric wire 31. Can detect the disconnection position with a conventional probe, but as shown in (b) of the figure, the wire 41 is a multi-core cable, and the wire 41a to be detected is inside the other wire 41b. If it is twisted into the wire, it is difficult to detect the disconnection position in the conventional probe.

That is, even if a voltage is applied to the electric wire 41a, the electric wire 41b around it blocks the electric field, so that the electric field does not appear outside and the probe 23a cannot detect the presence or absence of the electric field. The present invention has been made in order to improve the above-mentioned drawbacks of the prior art, and it is possible to detect the presence or absence of an electric field even in an object installed in a place where a conventional probe is difficult to approach. An object is to provide a globe-type electric field sensor that can be easily detected.

[0008]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides an electric field detecting electrode 2 on a finger portion of a glove 1 made of an insulating material and connects the electric field detecting electrode 2 to an electric field meter as shown in FIG. The lead wire 4 is drawn out to detect the electric field.

[0009]

[Action]

 When detecting the electric field, the worker connects the lead wire pulled out from the electric field detection electrode 2 to the electric field meter 5 and puts on the glove 1, and brings the finger portion of the glove 1 close to the electric field detection target. Since the electric field detection electrode 2 is provided on the finger part of the glove, it is possible to detect the electric field in a fine place where the conventional electric field detection probe cannot be inserted. You can

[0010]

【Example】

 FIG. 1 is a diagram showing an embodiment of the present invention, in which 1 is a glove formed of an insulating material such as rubber, 2 is an electrode for detecting an electric field, 3 is a connecting lead wire between the electrodes 2, 4 Is a lead wire for extracting an electric field signal, and 5 is an electric field meter. It is desirable that the electrodes have a thin structure so that the fingers can easily move. The electrode 2 may be provided on the entire surface of the finger portion of the globe 1, or may be provided on a part of the finger.

FIG. 2 is a diagram showing an example of a sectional structure of the electrode 2 of FIG. 1, 11 is an electrode layer, 11 a is a ground electrode layer, 12 is an insulating layer, 12 a is an outer insulating layer, 12 b is an inner insulating layer, 12c shows an intermediate insulating layer, and the lower side of the figure shows the inside of the glove. In FIG. 2, (a) shows the most basic structure, in which the electrode layer 11 is provided outside the globe 1 made of an insulating material. (B) shows an insulating layer 12a provided on the outer side of the electrode layer 11 shown in (a) of the figure. By providing the insulating layer 12a, the electrode 11 of the globe 1 can be attached to the ground portion such as the shield of the electric wire. You can avoid contact.

FIG. 2C shows an intermediate insulating layer 12c and a ground electrode layer 11a provided between the electrode layer 11 and the internal insulating layer 12b shown in FIG. 2B. In some cases, the human body may be charged by being affected by the surroundings (for example, commercial power supply). The ground electrode layer 11a is provided to eliminate the influence of the human body being charged as described above. By grounding the ground electrode layer 11a, the influence of the human body's electrification is eliminated. can do.

When the wire breakage point is detected by the clove shown in FIG. 1, the worker wears the globe 1 and connects the electric field signal lead wire 4 of the glove 1 to the electric field meter 5. To continue. Then, as shown in FIG. 3, a voltage is applied to the electric wire, and the worker brings the electrode 2 of the glove 1 close to the electric wire to be searched for the breaking point and detects the electric field generated. Then, as described above, the disconnection point is detected by detecting the point where the electric field changes from being present to being present or not present.

In the present invention, the electric field detection sensor is in the shape of a glove, and the operator wears it on his / her hand to detect the presence or absence of an electric field. It is also possible to detect electric fields in small areas that cannot be inserted. For example, even in the multi-core cable shown in FIG. 4B, since the electrode 2 can be brought close to the inner core wire by inserting a finger between the wires, the disconnection point can be easily detected. be able to.

In the above embodiment, an example in which the globe type electric field sensor is applied to the wire breakage detection is shown, but the present invention is not limited to the above embodiment, and other conventional electric field detection is possible. It can be applied to the electric field detection of the part where the probe for insertion is difficult to insert.

[0016]

[Effect of device]

 As is clear from the above description, in the present invention, since the electric field detection electrodes are provided on the finger part of the glove, it is possible to perform electric field detection in a fine place where the conventional electric field detection probe cannot be inserted, It is possible to easily detect disconnection of the core cable.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing an example of a sectional structure of an electrode of a globe.

FIG. 3 is a diagram showing a method of detecting a wire break point.

FIG. 4 is a diagram showing a case where a conventional electric field detection probe is used to detect a disconnection point.

[Explanation of symbols]

 1 Globe 2 Electrode 3 Connection Lead Wire 4 Lead Wire for Extracting Electric Field Signal 5 Electrometer 11 Electrode Layer 12 Insulation Layer

Front page continuation (72) Makoto Tako 2-6-1, Marunouchi, Chiyoda-ku, Tokyo Furukawa Electric Co., Ltd. (72) Toshikatsu Kiyohara 1-3-6 Haneda, Ota-ku, Tokyo Nihon Aviation Co., Ltd. Technical Research Center

Claims (1)

[Scope of utility model registration request] 1. A glove type electric field sensor, wherein an electric field detecting electrode is provided on a finger portion of a glove made of an insulating material, and a lead wire connected to the electric field meter is drawn from the electric field detecting electrode.