JP2007285863A - Structure for preventing organism on electric field detector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure for preventing organisms on an electric field detector, capable of preventing aquatic organisms as a noise source from being deposited or living. <P>SOLUTION: A cavity part 2 is formed in an outer cylinder 1, an electrode 3 is arranged in the cavity part 2, a sea water taking-in port 5 for communicating the cavity part 2 with the outer cylinder 1 is formed in one end part of the outer cylinder 1, and an organism preventive filter 10 is further formed in the sea water taking-in port 5. The organism preventive filter 10 comprises organism preventive rubber, and has small holes 11 as a water channel in one ore more of portions. Sea water intrudes into through the small holes 11 to contact with the electrode 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a protection structure for an electric field detector that is submerged in water (particularly in the sea) and used to measure a minute potential difference in water.

  Conventionally, for example, a uniaxial electric field sensor is as shown in FIG. In this electric field sensor 80, an electric field sensor amplifying unit (not shown) constituted by a differential amplifier, an amplifier, or the like is built in a casing 81, and electrode sections 82 each having electrodes built in both ends of the casing 81 are provided. A water intake 83 is formed in each electrode part 82 so that water outside the housing 81 enters and comes into contact with the electrodes, and both electrode parts 82 obtained by water contacting the electrodes of each electrode part 82 are provided. Is measured and amplified by the electric field sensor amplifying unit, and the output thereof is led out of the electric field sensor 80 through the cable 84 (see, for example, Patent Document 1).

  The electric field sensor 80 is used to measure a minute potential difference in water.

JP 2001-228257 A

  By the way, in the electric field sensor 80 as described above, since the water intake 83 is inserted toward the back of the electrode portion 82, marine organisms attach or inhabit in the vicinity of the water intake 83 as a suitable residence. In some cases, noise is generated, which adversely affects the measurement.

  The present invention has been made paying attention to such problems, and an object of the present invention is to provide a structure for preventing the occurrence of electric field detectors that prevents the attachment and inhabitation of aquatic organisms that are noise sources.

  In order to solve the above-described problems, the structure for preventing electric fields of an electric field detector according to the present invention has an electrode disposed in a housing, a water intake port that communicates the electrode with the outside of the housing is formed, and water outside the housing is taken in. In the configuration in which the potential obtained by contacting the electrode through the mouth is measured and the measured value is derived to the outside of the housing with a lead wire, a remedial filter is provided in the vicinity of the water intake. To do.

  In this anti-seismic structure of the electric field detector, the aquatic organisms are prevented from adhering to or inhabiting the vicinity of the water intake, and the generation of noise by the aquatic organisms can be effectively prevented.

  In addition, a bioresistive filter is a product made from biorubber, and has one or more small holes as a water channel.

  According to the anti-protection structure of the electric field detector of the present invention, since the anti-resistive filter is provided in the vicinity of the water intake, the following effects can be obtained.

(1) Aquatic organisms are hardly attached or inhabited near the water intake, and noise generation by aquatic organisms can be effectively suppressed.
(2) The material cost can be reduced because only the anti-sealing filter is provided near the water intake.
(3) The maintenance cost can be reduced because it is easy to attach / remove the anti-sealing filter.

  Hereinafter, the present invention will be described in more detail with reference to embodiments.

  FIG. 1 is an external view of an electric field detector (an anti-protection structure) according to the embodiment, and FIG. In this electric field detector, a cylindrical hollow portion 2 is formed in an outer cylinder 1 as a housing, an electrode 3 is disposed in the hollow portion 2, and a water intake port (in which the hollow portion 2 communicates with the outside of the outer cylinder 1) The seawater intake port 5 is formed at one end of the outer cylinder 1, and the seawater outside the outer cylinder 1 enters the cavity 2 through the seawater intake port 5 and comes into contact with the electrode 3, leading to the potential. Output to line 4.

  A feature of this electric field detector is that a seawater intake port 5 is provided with a biocidal filter 10. As shown in FIG. 3, the biocidal filter 10 is a cylindrical one made of biorubber, and has one or more (here, many) small holes 11 as a water channel so as to block the seawater intake 5. Are attached in close contact with the seawater intake 5. Accordingly, seawater enters the cavity 2 through the small hole 11 and contacts the electrode 3. In addition, the anti-sealing filter 10 is attached to the seawater intake 5 by, for example, fitting, and is easily attached and detached.

  In addition, you may provide the filter 15 without a protection function in the communication part of the cavity part 2 and the seawater intake 5 as needed. In this case, dust contained in seawater can be prevented from entering the cavity 2.

  In the electric field detector configured as described above, since the anti-sealing filter 10 is present at the seawater intake 5, marine organisms hardly attach or inhabit the vicinity of the seawater intake 5, Generation of noise by living organisms can be prevented. Of course, the filter 15 can prevent generation of noise due to entry of dust and the like contained in seawater and peripheral tides.

It is an external view of the electric field detector which concerns on embodiment. It is a partially broken sectional view of the electric field detector. It is a perspective view of the prevention filter in the same electric field detector. It is an external view of the uniaxial electric field sensor which concerns on a prior art example.

Explanation of symbols

1 outer cylinder (housing)
2 Cavity 3 Electrode 4 Lead wire 5 Water intake (seawater intake)
10 Protection filter 11 Small hole 15 Filter (without protection function)

Claims (2)

An electrode is placed inside the housing, a water intake port is formed to communicate the electrode with the outside of the housing, the potential obtained by the water outside the housing coming into contact with the electrode through the water intake port is measured, and the measured value is the lead wire. In the electric field detector configured to be led out of the housing with
An anti-resisting structure for an electric field detector, characterized in that an anti-resistive filter is provided in the vicinity of the water intake. 2. The anti-seismic structure for an electric field detector according to claim 1, wherein the anti-bio filter has one or more small holes as water channels.

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