JP6877083B1 - Grounding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ground (electrically ground) an onboard electric device while suppressing ionization and corrosion of the onboard electric device and ship parts without using zinc. SOLUTION: A grounding device 100 uses a tourmarine exhibiting a piezoelectric effect as a grounding functional material capable of removing a high frequency component contained in an electric current, and is connected to an arbitrary electric device by a negative electrode terminal 31 and a positive electrode terminal 4. Grounding function Allows current to flow into the material. The grounding device 100 has a grounding function by inserting a rod-shaped negative electrode terminal 31 into the space portion of the spring member 34 in a state where the body 2 filled with the grounding functional material 5 and the lid 1 are fitted to each other. Pressurize the material. [Selection diagram] FIG. 9

Description

The present invention relates to a grounding device that uses a piezoelectric material (particularly tourmaline) to reduce high-frequency noise.

Needless to say, Japan is an island nation surrounded by the sea and a maritime nation.
Due to these geographical conditions, the fishing industry has been active in nature since ancient times in Japan, and many of the food cultures are related to seafood.
This is clearly reflected in the figures of the statistical indicators, and in the ranking of the number of commercial fishing vessels in the world in 2016 (total number of powered fishing vessels including large vessels and Nopa type vessels), Japan is 3 after China and Indonesia. It is ranked in the rank.

By the way, in recent years, various electric devices such as sonars, fishfinders, refrigerators, and lighting devices have tended to be installed in ships.
Generally, when an electric device is grounded (electrically grounded) in a ship, the so-called jink is used as a sacrificial metal to connect to the electric device, and the earth is grounded by using the potential difference between the jink and the electrolyte in seawater.

As the above zinc, a metal having a higher ionization tendency than the corrosive body contained in the electrolyte in seawater and easily cationizing and binding to other negative ions is generally used.
Specific examples of zinc include aluminum, magnesium, zinc and the like.

When zinc is used as a sacrificial metal and connected to electrical equipment on board, the constituent materials of each component in the electrical equipment take electrons from zinc, resulting in a relatively negative potential.
As a result, cationization of zinc is promoted, and corrosion (bonding with external negative ions) proceeds on the zinc side, which has a relatively positive potential.
Therefore, these electrical devices can be used while protecting the electrical devices on board from the corrosion-protected bodies contained in the electrolyte in seawater (cathodic protection).
Furthermore, according to the earthing method using a zinc, the influence of harmonic components (distortion of static electricity and electromagnetic waves) on the electrical equipment in the ship can be alleviated to some extent.

However, the above-mentioned earth method has a technical destiny that zinc, which plays a role as a sacrificial metal, is ionized and consumed.

In addition, according to the earthing method using a zinc, the immediate effect is such that the influence of a large amount of electric charge suddenly generated on the ship due to a lightning strike or a large amount of electric charge existing on the charged sea surface on the electrical equipment on board is quickly mitigated. It does not have (sufficient grounding performance).
Therefore, according to the same method, when a ship is hit by lightning or when a large amount of electric charge is present on the sea surface, it is not possible to prevent the influence of these electric charges on the onboard electronic equipment, and not only the electronic equipment is adversely affected. Furthermore, there is a risk of causing ionization and even corrosion of ship parts such as engines, wiring, valves, and screws. In particular, ionization and corrosion of wiring is extremely dangerous because it may cause a short circuit and cause a fire.
Furthermore, among ship parts, bearings that are oil-coated are prone to failure due to distortion of the bearing itself due to the film component being peeled off by energization.

In the past, various techniques for stabilizing the earth potential of electrical products (parts) have been proposed (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2007-08805 Japanese Patent Application No. 2019-026240

The technology of Patent Document 1 assumes an automobile or an electric product as an application target of the technology.
When applying the technology of Document 1 to electrical equipment mounted on a ship, either application, adhesion, or mixing of negative ion generating substances (tourmaline ore powder, etc.) to the part that should be the ground potential of the electrical equipment on board. (Reference 1, Fig. 2).
However, the problem of grounding electrical equipment in ships is different from grounding on land, and it is necessary to consider the potential difference between the electrical equipment to be grounded and the electrolyte in seawater.
Therefore, even if the electrical equipment itself in the ship is coated with the negative ion generating substance in accordance with the disclosure contents of Patent Document 1, the negative ion generating substance "exists on the ship itself or on the sea surface" due to the very small amount of the negative ion generating substance applied. It is difficult to completely eliminate the effects of large amounts of charge. "
Therefore, there is a possibility that the above-mentioned problem peculiar to the earth in a ship (prevention of ionization / corrosion of ship parts when a large amount of electric charge is present on the ship itself or the sea surface) cannot be solved.

Further, the technique of Patent Document 1 is limited to "coating, adhering, and mixing" tourmaline ore powder or the like with respect to a portion that should have an earth potential (Patent Document 1, FIG. 2). For example, Document 1 and FIG. 1 disclose an ionized automobile body and the like.
Therefore, in the technique of Patent Document 1, the negative ion generating substance (powder of tourmaline ore, etc.) is not connected to the electric device to be grounded by wiring, and the negative ion generating substance is electrically firmly incorporated in the circuit. It's not something that was done.

Furthermore, as one of the electrical properties of tourmaline, the "piezoelectric effect" in which polarization proportional to pressure appears is well known.
However, in the usage of tourmaline according to the technique of Patent Document 1, since tourmaline is used in a powder state and is not pressurized at all, it is considered that the electrical properties of tourmaline are not sufficiently brought out.

In the first and fifth paragraphs of Patent Documents, by stabilizing the earth potential, (1) improvement of quietness performance of automobiles, (2) improvement of power performance, improvement of fuel efficiency, (3) improvement of sound quality of audio products, (4) It is also stated that it is possible to comprehensively improve suspension performance, etc., and that it is also possible to save energy and improve various performances of electrical appliances.
However, Patent Document 1 does not disclose any explanation of the mechanism (principle) that is the basis of such an improvement effect or specific experimental data.
More specifically, Document 1 shows what kind of electrical event occurs by applying, adhering to, and mixing a negative ion generating substance, and what kind of improvement effect is caused by it. No mention is made of experiments that support various improvement effects.
Therefore, it seems difficult to determine whether the improvement effect can be achieved by applying, adhering to, or mixing the negative ion generating substance.

The present invention has been made in view of the above problems, and has been made in view of the above problems. Without using zinc made of a metal material having a high ionization tendency, while suppressing the occurrence of ionization and corrosion of electrical equipment and ship parts in the ship, the inside of the ship The purpose is to enable the electrical equipment to be grounded.

In order to solve the above problems, the inventor of the present application discloses the following grounding device 900 (FIG. 17) invented by himself / herself in Patent Document 2 in the past.
[Prior Technique of Patent Document 2]
The grounding device 900 uses a sintered mixture of tourmarin and ferrite showing a piezoelectric effect as a grounding functional material capable of removing high-frequency components contained in an electric current, and connects a grounding terminal 913 to any electric device by conducting a wire. An electric current is allowed to flow into the earth functional material through the ground (FIG. 18).

The grounding device 900
A grounding member 911 formed into a cylindrical or polygonal column shape made of a grounding functional material, and a grounding member 911.
A rod-shaped member made of copper or other metal as a constituent material, and a core member 912 embedded in the ground member in parallel with the axial direction of the ground member.
A ground terminal 913 made of a metal material connected to the core member 912 and
It includes a spring member 914 made of an elastic body.

Further, in the grounding device 900, the spring member 914 is brought into contact with the bottom surface of the grounding member 911 to pressurize the grounding member.

In the conventional grounding method using zinc used in ships, corrosion progresses and zinc is consumed while continuously grounding the electrical equipment on board.
However, in the grounding device 900 of Patent Document 2 conceived by the inventor of the present application, the grounding function is realized by paying attention to tourmaline (tourmaline) exhibiting a piezoelectric effect and pressurizing it to act as a capacitor.

Here, the "piezoelectric effect" is added because the relative positional deviation between the cations and anions arranged in the crystal becomes large when pressure is applied to the lattice-shaped crystal from the outside. It refers to a polarization phenomenon that is proportional to pressure.
Since tourmaline is a mineral, unlike zinc, which has a high ionization tendency, weight loss due to consumption does not occur even if current from onboard electrical equipment flows in. Therefore, a grounding device 900 having a long life and high durability can be realized.
Further, the grounding device 900 of Patent Document 2 ionizes onboard electrical equipment or ship parts even when a large amount of electric charge is suddenly generated on the ship due to a lightning strike or a large amount of electric charge is present on the charged sea surface. -Can prevent dissolution.

Further, according to Patent Document 2, the grounding functional material can store the current I (charge) that has flowed into the core member 12 from the electrical equipment on board (see Document 2 and FIG. 5).
That is, even in an environment such as a ship, which is surrounded by a large amount of electric charge existing on the sea surface and it is difficult to find a grounding destination (accepting destination) to release the electric charge flowing on the electric circuit when using an electric device. The grounding device 900 of Document 2 can be an effective grounding destination for such charges.
As a result, it is possible to reduce the influence of noise including various high-frequency components such as sudden noise in the onboard electrical equipment used on the ocean.

The grounding device 900 of Patent Document 2 is widely used as a grounding device for ships in fishing boats, pleasure boats, passenger ships, cargo ships, and tankers, as well as a wide range of electronic devices, communication devices, medical devices, industrial machines, automobiles, aircraft, and power generation. It can also be used for the purpose of reducing noise due to high-frequency components in places. The device scale (size) of the grounding device 900 can be appropriately changed according to the capacity of the electric device connected to the device 900.

As can be seen from FIGS. 17 and 18, the grounding device 900 of Patent Document 2 has a “single pole terminal structure”.
In such an apparatus configuration according to Patent Document 2, it is difficult to accurately measure the polarization voltage generated by pressurizing the spring member 914, and it is "difficult to analyze an electrical event" occurring inside the grounding apparatus 900. It was.
Further, in the device configuration of Patent Document 2, it is difficult to measure the voltage across the ground member 911 when the ground device 900 is connected to a load on an electric circuit (not shown), and the device 900 is connected to the connection load (not shown). There was a problem that it was difficult to quantitatively analyze the noise suppression effect (not shown).

[First invention]
Therefore, in order to solve the above problems, the grounding device according to the first invention of the present application is used.
A grounding device that uses tourmaline, which exhibits a piezoelectric effect, as a grounding functional material that can remove high-frequency components contained in current, and allows current to flow into the grounding functional material via a terminal that is connected to an arbitrary electric device by a conductor.

A cylindrical hollow structure for accommodating a grounding functional material, which has an opening on the upper surface side of the cylinder and a bottom insertion hole for inserting a positive electrode terminal on the bottom surface side of the cylinder. ,
A lid made of a cylindrical hollow structure, which is fitted with a container and has an upper insertion hole on the upper surface for inserting a negative electrode terminal.
The positive electrode terminal made of a metal material, which has a disk portion installed on the bottom surface of the container and has a terminal shaft formed with a screw thread protruding to the outside of the container through an insertion hole at the bottom of the container.
A positive electrode cap having a thread groove, which is screwed with a screw thread formed on the terminal shaft of the positive electrode terminal,
The rod-shaped negative electrode terminal made of a metal material and having a terminal shaft protruding to the outside of the lid through the upper insertion hole of the lid, and the negative electrode terminal.
A metal negative electrode disk with a shaft through hole in the center for inserting the negative electrode terminal, and
A circular sealing part made of synthetic resin material with a shaft through hole for inserting the negative electrode terminal in the center, and a circular sealing part.
It is equipped with a spiral spring member made of an elastic body.

The grounding functional material is pressurized by inserting a rod-shaped negative electrode terminal into the space portion of the spring member in a state where the lid and the body filled with the grounding functional material are fitted to each other.

According to the first invention, it is possible to measure the polarization voltage generated for the grounding functional material by pressurizing the spring member 34 (FIG. 9), and it is possible to analyze the electrical event in the grounding device 100.
Further, according to the first invention, the voltage across the grounding functional material 5 (tourmaline) (voltage between the positive electrode terminal 4 and the negative electrode terminal 31) when the grounding device 100 is connected to the load Z on the electric circuit is measured. It is also possible.
Therefore, it becomes easy to quantitatively analyze the noise suppression effect on the connection load Z brought about by the apparatus 100.

[Second invention]
Further, in order to solve the above problems, the grounding device according to the second invention of the present application is the grounding device according to the first invention of the present application.
Instead of tourmaline, any of other piezoelectric materials such as crystal, quartz, topaz, ceramic, and potassium sodium tartrate was used as the earth function material.

According to the second invention, as the earth functional material, instead of tourmaline, any of a piezoelectric material other than tourmaline such as crystal, quartz, topaz, ceramic, and Rochelle salt (potassium sodium tartrate) is replaced.
As described above, since the second invention has technical features of substantially the same principle that can be replaced with the essential component (tourmaline) in the first invention, it has the same effect as the first invention.

It is a schematic diagram which shows the appearance of the grounding apparatus which concerns on embodiment of this invention. It is a schematic diagram which shows the use state of the earth device. It is a schematic diagram which shows the component of the earth device. It is a schematic diagram which shows the component when the negative electrode terminal, the negative electrode disk, and the sealing part are integrally combined in the grounding apparatus. It is a schematic diagram which shows the component when the negative electrode terminal is inserted into the space part of a spring member in the earth device. It is a schematic diagram which shows the component when the negative electrode terminal is combined with the body in the earth device. It is a schematic diagram when the lid and the body are fitted, and the positive electrode cap is attached in the grounding device. It is the cross-sectional schematic diagram of the earth device, and is the figure before fitting the lid to the body. It is the cross-sectional schematic diagram of the earth device, and is the figure after fitting the lid to the body. It is a circuit block diagram when the earth device is not connected to a DC load (motor with a brush). This is the voltage measurement result when the grounding device is not connected to the DC load (motor with brush). It is a circuit block diagram when the earth device is connected to the DC load (motor with a brush). This is the voltage measurement result when the grounding device is connected to the DC load (motor with brush). (A) is a circuit configuration diagram when the connection of the ground device is turned off to the AC load (notebook PC), and (b) is a circuit configuration when the connection of the ground device is turned on to the AC load (notebook PC). It is a figure. It is a table which shows the jitter measurement value at the time of turning on / off the connection of the earth device with respect to the AC load (notebook type PC). It is a schematic diagram which shows the use state which connected only one side terminal of the earth device of embodiment. It is a schematic diagram which shows the cross section of the grounding apparatus of the prior art (Patent Document 2). FIG. 5 is a perspective view showing a state in which a grounding member is housed inside in a grounding device of a conventional technique (Patent Document 2).

Hereinafter, the grounding device of the present invention will be described with reference to FIGS. 1 to 18.
[Embodiment]
An embodiment of the present invention is an example in which tourmaline is used as the grounding functional material 5 to configure a grounding device 100 capable of grounding the electrical equipment in the ship without causing ionization or corrosion of the ship parts or the electrical equipment in the ship.
This content will be described in detail below.

FIG. 1 is a schematic view showing the appearance of the grounding device 100 according to the present embodiment.
The grounding device 100 has a cylindrical shape as a whole, and positive electrode terminals 4 and negative electrode terminals 31 are provided on both bottom surfaces of the cylinder.
The grounding device 100 of this example uses a grounding functional material 5 (FIGS. 8 and 9) capable of removing high-frequency components contained in an electric current.
In the grounding device 100 of the present application, tourmaline exhibiting a piezoelectric effect is used as the grounding functional material 5.

When using the grounding device 100, as shown in FIG. 2, any electric device can be used by connecting the power supply line side lead wire WR-P to the positive electrode terminal 4 and connecting the ground line side lead wire WR-G to the negative electrode terminal 31. Connect with (not shown).
As a result, the current from the outside (electrical device) of the grounding device 100 flows into the grounding functional material 5 (FIG. 9) via the positive electrode terminal 4.

Next, the internal configuration of the grounding device 100 will be described.
As shown in FIG. 3, the grounding device 100 includes a lid 1, a body 2, a negative electrode terminal 31, a negative electrode disk 32, a sealing portion 33, a spring member 34, a positive electrode terminal 4, and a positive electrode cap 43. ,have.

The lid 1 is made of a columnar hollow structure.
The lid 1 is fitted to the body 2 (FIGS. 6 and 9), and an upper insertion hole 12 for inserting the negative electrode terminal 31 is provided on the upper surface thereof (FIG. 3).
The lid 1 is made of an insulating material (for example, a synthetic resin such as polypropylene).

The container 2 is a columnar hollow structure for accommodating the earth functional material 5 (FIGS. 8 and 9).
As shown in FIG. 3, the container 2 has an opening on the upper surface side of the cylinder.
Further, the body 2 is formed with a bottom insertion hole 22 (FIG. 3) for inserting the positive electrode terminal 4 (terminal shaft 42) on the bottom surface side of the cylinder as shown in FIG.
Like the lid 1, the container 2 is also made of an insulating material such as polypropylene.

As shown in FIG. 3, the negative electrode terminal 31 is a rod-shaped member made of a metal material.
The terminal 31 has a terminal shaft that projects to the outside of the lid through the upper insertion hole 12 of the lid 1 (FIGS. 6 and 8).
The negative electrode terminal 31 can be made of copper, which is widely and generally used as a good conductor having high electrical conductivity.

The negative electrode disk 32 is a metal disk member provided with a shaft through hole at the center for inserting the negative electrode terminal 31.
As shown in FIG. 4, the negative electrode disk 32 is used in combination with the negative electrode terminal 31 integrally.

As shown in FIG. 3, the sealing portion 33 is a circular member made of a synthetic resin material in which a shaft through hole for inserting the negative electrode terminal 31 is provided in the central portion.
As shown in FIG. 9, the sealing portion 33 plays a role of confining tourmaline, which is the earth functional material 5, in the body 2.
As shown in FIG. 4, the sealing portion 33 is used in combination with the negative electrode terminal 31 integrally.

As shown in FIG. 3, the spring member 34 is a spiral spring (coil spring) made of an elastic body.
As the material of the spring member 34, a metal, a synthetic resin, or the like can be used.

As shown in FIG. 8, the spring member 34 is in a natural length state before fitting the lid 1 and the container 2 in which the grounding functional material 5 is filled.

After that, when the lid 1 and the body 2 are fitted as shown in FIG. 9, the spring member 34 is sandwiched between the lid 1 and the negative electrode disk 32 and is in a state of being compressed more than the natural length.
In FIG. 9, a rod-shaped negative electrode terminal 31 is inserted through the space portion of the spring member 34.
By applying the elastic force of the spring member 34 to the earth functional material 5 (tourmaline) filled in the body 2 in this way, the earth functional material 5 is pressurized to generate a piezoelectric effect.

The positive electrode terminal 4 has a disk portion installed on the bottom surface portion in the body 2 (FIGS. 4 and 5).
Further, as shown in FIG. 4, the positive electrode terminal 4 has a terminal shaft 42 having a thread formed so as to project to the outside of the body 2 through the bottom insertion hole 22 of the body 2.
The positive electrode terminal 4 is made of a metal material.

The positive electrode cap 43 is a removable cap having a thread groove that is screwed with a screw thread formed on the terminal shaft 42 of the positive electrode terminal 4.
The positive electrode cap 43 serves to cover the terminal shaft 42 of the positive electrode terminal 4 (FIG. 7).

In the grounding device 100, "tourmaline" is used as the grounding functional material 5 shown in FIGS. 8 and 9.
On the other hand, the grounding device 900 of Patent Document 2 invented by the inventor of the present application in the past uses a sintered mixture of tourmaline and ferrite.
Therefore, the grounding device 100 of the present application is different in that "ferrite is not mixed".
In the present application, since the step of mixing tourmaline and ferrite is not required in the manufacturing process of the grounding functional material 5, the manufacturing time of the grounding device can be shortened.

Tourmaline used as an earth functional material 5 of the present apparatus 100 is a mineral belonging to the cyclic type silicate mineral six SiO ₄ tetrahedrons formed by the annular _{coupling, NaX 3 Al 6 (BO 3} ) 3 Si 6 O _It has a composition of 18 (OH, F) ₄ (X: magnesium, iron, manganese, lithium, aluminum, etc.).
Tourmaline has an electrical property with a dielectric constant of 6.7 to 7.3 [F / m], a mechanical property with a hardness of 6.5 to 7, and a physical property with a specific gravity of 2.90 to 3.22.

In the grounding device 100, a polarization voltage of about "0.17V to 0.38V" is confirmed between the positive electrode terminal 4 and the negative electrode terminal 31 due to the piezoelectric effect of the grounding functional material 5 pressurized by the spring member 34. Was done.
At the time of measuring the polarization voltage, the positive electrode terminal 4 had a higher potential than the negative electrode terminal 31.

Next, the operation of the grounding device 100 according to the present embodiment will be described.
When using the grounding device 100 of FIG. 1, as shown in FIG. 2, the lead wire WR-P on the power supply line side is connected to the positive electrode terminal 4, and the lead wire WR-G on the ground line side is connected to the negative electrode terminal 31. Connect with.

[Noise suppression effect on DC load]
In order to confirm whether or not the noise suppression effect can be obtained with respect to the DC load by connecting the grounding device 100, the electric circuits of FIGS. 10 and 12 were configured and a comparative experiment was conducted.
In this comparative experiment, the following equipment was used.
(1) DC power supply PS-D: DC power supply DK-910 (manufactured by Sanhayato Co., Ltd.)
(2) DC load Z-1: DC motor with brush RE-260-RA (manufactured by Mabuchi Motor Co., Ltd.)
(3) Measuring instrument: Oscilloscope PicoScope2105 (manufactured by Picoscope)

[DC load: no grounding device connected]
When the DC load Z-1 (DC motor with brush) is operated by supplying a DC voltage of 3 V from the DC power supply PS-D without using the grounding device 100 as shown in FIG. A voltage waveform as shown in FIG. 11 was observed at both ends.
In the observed waveform of FIG. 11, a large amount of sudden impulse-like noise (harmonic components) is generated.

[DC load: with grounding device connected]
After the voltage waveform measurement in the circuit configuration of FIG. 10 was completed, the circuit of FIG. 12 was configured, and the voltage waveforms across the DC load Z-1 were measured using an oscilloscope.
When the grounding device 100 is connected in FIG. 12, the positive electrode terminal 4 (terminal provided on the bottom surface of the body 2) of the grounding device 100 is connected to the power supply line PL on the high potential side, and the grounding line on the low potential side. The negative electrode terminal 31 (terminal provided on the upper surface of the lid 1) of the grounding device 100 was connected to the GL.

When the grounding device 100 is connected to the DC load Z-1 (DC motor with brush) and the load Z-1 is operated, remarkable noise suppression is achieved against sudden impulse noise as shown in FIG. The effect was seen.

Tourmaline, which is the earth function material of the apparatus 100, is a dielectric material. Furthermore, it has been confirmed by the experiment that the inventor of the present application has tried that the grounding device 100 also has an ability to store electric charges.
Therefore, in the circuit configuration of FIG. 12, the grounding device 100 collects noise (harmonic components) flowing in from the DC power supply PS-D and noise (harmonic components) generated from the load Z-1 (DC motor with brush). , It may play a role of escaping from the power supply line PL to the ground line GL.
Such an action is also exhibited in a decoupling capacitor (bypass capacitor).

However, in the experiment conducted by the inventor of the present application, the grounding device 100 showed an electrical behavior clearly different from that of a general capacitor.
In the case of a general capacitor, if the positive electrode and the negative electrode are short-circuited after being stored, the electric charge stored in the capacitor is quickly discharged.
Therefore, in a general capacitor, when the voltage between both poles is measured after a short circuit at both ends, the voltage value becomes zero.

On the other hand, even if the grounding device 100 is connected to a DC power source to store electricity and then the positive electrode and the negative electrode are short-circuited, the voltage after the short circuit between the positive electrode terminal 4 and the negative electrode terminal 31 does not become zero, and the polarization voltage remains. (In the experiment, the DC voltage was 0.17V).

Further, it is considered that the following events also contribute to the reason why the noise suppression effect is exhibited by the grounding device 100.
The electric charge (carried as an electric current) that has flowed into the earth functional material 5 (tormarin) from the load Z-1 is temporarily stored in the functional material 5, but the dielectric loss (in the dielectric) that occurs in the tourmarin for high-frequency components. It is thought that it disappears due to the phenomenon that electrical energy is lost as heat energy).
Further, it is considered that the current flowing into the earth functional material 5 is consumed by the resistance component of the functional material 5 itself to generate Joule heat, which also brings about a noise suppressing effect.

[AC load: No grounding device connected]
Next, the noise suppression effect of the grounding device 100 on an AC load will be described.
In order to confirm this effect, the measurement environment shown in FIGS. 14 (a) and 14 (b) was constructed, and the parallel connection of the grounding device 100 to the AC load Z-2 was turned on / off by turning the switch SW on / off. Then, an experiment was conducted.

A notebook PC (Personal Computer) was used as the load Z-2 in FIGS. 14 (a) and 14 (b).
Further, in the grounding device 100, the positive electrode terminal 4 (bottom side terminal of the body 2) is connected to the power supply line PL, and the negative electrode terminal 31 (upper surface side terminal of the lid 1) is connected to the grounding line GL.
The measurement target was the jitter of the computer clock signal in the notebook PC.
Here, "jitter" refers to a time difference of an actual signal with respect to an ideal signal that occurs in communication equipment, audio-related equipment, and the like.

FIG. 15 shows the jitter measurement results when the grounding device 100 is connected in parallel to the AC load Z-2 (notebook PC) (on) and when the grounding device 100 is not connected in parallel (on).
Compared to the jitter (temporal deviation of the actual signal from the ideal signal) that occurred when the grounding devices 100 were not connected in parallel, the jitter was reduced to "1/3 or less" by connecting the device 100, and the time axis direction. The deviation of the computer clock signal in the above has been improved so as to be significantly closer to the ideal signal.

As described above, according to the grounding device 100 according to the present embodiment, tourmaline exhibiting a piezoelectric effect is pressurized to behave as a capacitor.
By doing so, the electric energy of the current flowing from the electric device outside the grounding device 100 is eliminated in the grounding functional material 5.

More specifically, the high-frequency component contained in the current flowing into the grounding device 100 is eliminated by the dielectric loss, and the current itself is consumed by the resistance component of the grounding functional material to generate Joule heat.
Therefore, it is possible to realize (1) reduction of noise caused by high frequency components in electrical equipment, and (2) stable grounding in vehicles such as ships.

Since tourmaline is a mineral, unlike zinc, which has a high ionization tendency, the earth functional material 5 (FIGS. 8 and 9) is not consumed even if an electric current from the onboard electrical equipment flows in.
Therefore, instead of the conventional grounding method in a ship that is premised on the consumption of sacrificial metals such as aluminum and magnesium, it is possible to carry out electrical grounding in the ship extremely safely while ensuring high durability of the grounding device.

Further, in the grounding device 100 of the present embodiment, the disappearance of the inflowing current due to the dielectric loss of the high frequency component and the Joule heat generation of the current due to the resistance component of the grounding functional material are performed in a very short time from the time of the inflow of the current.
Due to the high-speed response to this inflow current, in the grounding device 100 of the present application, even if a large amount of electric charge is suddenly generated on the ship due to a lightning strike or a large amount of electric charge is present on the charged sea surface, the electric equipment or the ship component on the ship. Ionization / dissolution is avoided.

[Modification example]
In the grounding device 100, as shown in FIG. 16, the positive electrode terminal 4 covers the positive electrode cap 43 and does not connect any conducting wire, and connects the grounding side conducting wire WR-G only to the negative electrode terminal 31 to connect to an electric device. You can also use it.
By doing so, it can be used as a grounding device provided with only one terminal, as in the grounding device 900 of Patent Document 2.

Although the present invention has been described above with reference to the embodiments, the present invention is not limited to the above embodiments. Various modifications that can be understood by those skilled in the art can be made to the structure and details of the present invention without departing from the gist of the present invention.

1 Lid 2 Body 31 Negative electrode terminal 32 Negative electrode disk 33 Sealing part 34 Spring member 4 Positive electrode terminal 43 Positive electrode cap 5 Grounding functional material 100 Grounding device

Claims (2)

A grounding device that uses tourmaline, which exhibits a piezoelectric effect, as a grounding functional material that can remove high-frequency components contained in current, and allows current to flow into the grounding functional material via a terminal that is connected to an arbitrary electric device by a conductor.

A cylindrical hollow structure for accommodating a grounding functional material, which has an opening on the upper surface side of the cylinder and a bottom insertion hole for inserting a positive electrode terminal on the bottom surface side of the cylinder. ,
A lid made of a cylindrical hollow structure, which is fitted with a container and has an upper insertion hole on the upper surface for inserting a negative electrode terminal.
The positive electrode terminal made of a metal material, which has a disk portion installed on the bottom surface of the container and has a terminal shaft formed with a screw thread protruding to the outside of the container through an insertion hole at the bottom of the container.
A positive electrode cap having a thread groove, which is screwed with a screw thread formed on the terminal shaft of the positive electrode terminal,
The rod-shaped negative electrode terminal made of a metal material and having a terminal shaft protruding to the outside of the lid through the upper insertion hole of the lid, and the negative electrode terminal.
A metal negative electrode disk with a shaft through hole in the center for inserting the negative electrode terminal, and
A circular sealing part made of synthetic resin material with a shaft through hole for inserting the negative electrode terminal in the center, and a circular sealing part.
It is equipped with a spiral spring member made of an elastic body.

It was configured to pressurize the grounding functional material by inserting a rod-shaped negative electrode terminal into the space of the spring member while the lid and the body filled with the grounding functional material were fitted together. A grounding device that features.
The grounding device according to claim 1.
An earthing device characterized in that it is configured to use any of other piezoelectric materials such as crystal, quartz, topaz, ceramic, and potassium sodium tartrate as an earthing functional material in place of tourmaline.

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