JP2001272475A - Self-floating type submarine earthquake observing apparatus - Google Patents
Self-floating type submarine earthquake observing apparatusInfo
- Publication number
- JP2001272475A JP2001272475A JP2000090703A JP2000090703A JP2001272475A JP 2001272475 A JP2001272475 A JP 2001272475A JP 2000090703 A JP2000090703 A JP 2000090703A JP 2000090703 A JP2000090703 A JP 2000090703A JP 2001272475 A JP2001272475 A JP 2001272475A
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- Prior art keywords
- built
- self
- pressure
- vibration isolator
- resistant container
- Prior art date
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、海底で発生した地
震動を観測し、海底より自動的に或いは外部からのコマ
ンド等により強制的にアンカを切り離し観測装置本体が
自己浮上する自己浮上式海底地震観測装置に関し、特
に、水平方向の地震動により実際に地震動を観測する内
蔵装置に発生する共振を大幅に抑え、その共振ノイズを
観測の対象から外することにより正確な地震動の計測を
行う自己浮上式海底地震観測装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-floating seafloor earthquake in which the seismic motion generated on the seafloor is observed, the anchor is automatically separated from the seafloor or forcibly separated by an external command, and the observation device body self-floats. Regarding observation equipment, in particular, a self-floating type that measures resonance precisely, which greatly reduces the resonance generated in the built-in device that actually observes ground motion due to horizontal ground motion and excludes the resonance noise from the observation target It relates to an ocean bottom seismic observation device.
【０００２】[0002]
【従来の技術】従来、自己浮上式海底地震観測装置にお
いて内臓装置（重量物）を固定する手法を考える際、耐
圧容器壁面は海底下において圧力がかかるとその応力に
よって変形するため、水平方向の振動に対して強固に固
定することができなかった。そこで、固定方法として下
部或いは上部により取り付けステーによって固定した
が、その際、取り付けステーの長さと内臓装置の重量と
の関係から内蔵装置では水平方向の地震動に対する共振
が発生する。そのため、内蔵装置の固有振動数は低くな
り地震計の観測帯域内の周波数となってしまい正確な地
震動を計測することができなかった。2. Description of the Related Art Conventionally, when considering a method of fixing a built-in device (heavy object) in a self-floating type ocean bottom seismic observation device, the wall surface of a pressure-resistant vessel is deformed by the stress when applied under the sea floor. It could not be fixed firmly against vibration. Therefore, as a fixing method, the mounting stay is fixed by a lower portion or an upper portion. At this time, resonance is generated in the built-in device due to a horizontal earthquake motion due to the relationship between the length of the mounting stay and the weight of the internal device. For this reason, the natural frequency of the built-in device becomes low and becomes a frequency within the observation band of the seismometer, and it is impossible to measure an accurate ground motion.
【０００３】図３は、従来技術における自己浮上式海底
地震観測装置の構成例を示した図である。図３によれ
ば、地震計３１及び波形記録装置３２は内臓装置３３内
に搭載され、内臓装置３３は取り付けステー３４を介し
て耐圧容器３５内に固定されている。耐圧容器３５は、
切離装置３６によってアンカ３８と接続されている。こ
こで、アンカ３８に固定されている支柱３７と耐圧容器
３５は接触しているが、ネジなどでは固定されていな
い。しかし、耐圧容器３５が不安定にならないように、
切離装置３６は十分な張力をもって耐圧容器３５とアン
カ３８をつなげている。FIG. 3 is a diagram showing an example of the configuration of a conventional self-floating seafloor seismograph. According to FIG. 3, the seismometer 31 and the waveform recording device 32 are mounted in a built-in device 33, and the built-in device 33 is fixed in a pressure-resistant container 35 via a mounting stay 34. The pressure vessel 35
It is connected to an anchor 38 by a disconnecting device 36. Here, the column 37 fixed to the anchor 38 and the pressure-resistant container 35 are in contact with each other, but are not fixed with screws or the like. However, to prevent the pressure vessel 35 from becoming unstable,
The disconnecting device 36 connects the pressure-resistant container 35 and the anchor 38 with sufficient tension.
【０００４】したがって、耐圧容器３５は、支柱３７上
にしっかりと固定されており、海底の振動が正確に地震
計３１に伝達される。また、耐圧容器３５は中が空気で
満たされており、海中を浮上するのに十分な浮力を持っ
ている。そのため、切離装置３６が作動することによっ
て耐圧容器３５とアンカ３８とが切り離されると、耐圧
容器３５は海底から海面へ向かってゆっくりと浮上して
いく。[0004] Therefore, the pressure vessel 35 is firmly fixed on the column 37, and the vibration of the sea floor is transmitted to the seismometer 31 accurately. The pressure container 35 is filled with air, and has sufficient buoyancy to float in the sea. Therefore, when the pressure-resistant container 35 and the anchor 38 are separated by operating the separating device 36, the pressure-resistant container 35 slowly floats from the seabed to the sea surface.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、地震計
３１では、正確に伝達された海底の振動に加え、本従来
例の構成上内蔵装置３３内に発生する振動の波形が観測
される。ここでは、構成上内蔵装置３３内において発生
する振動の波形としては、取り付けステー３４の長さと
内蔵装置３３の重量との関係から低い固有振動数が観測
され、波形記録装置３２によって記録される。However, the seismometer 31 observes the waveform of the vibration generated in the built-in device 33 in the configuration of the conventional example in addition to the accurately transmitted vibration of the sea floor. Here, a low natural frequency is observed as the waveform of the vibration generated in the built-in device 33 due to the relationship between the length of the mounting stay 34 and the weight of the built-in device 33, and is recorded by the waveform recording device 32.
【０００６】次に、同図に示す自己浮上式海底地震観測
装置によって、図４のに示したような波形をもつ水平
方向の地震動（図３の）を観測した結果を図４のに
示す。本図に示されるように、本従来例の地震計３１に
よって観測される波形は、図４のに示した地震動本来
の波形と、本従来例の構成上発生する低い固有振動数の
波形との合成波形となり、本従来技術においては正確に
地震動を観測していない。これは、上述したように、取
り付けステー３４の長さと内臓装置３３の重量との関係
から耐圧容器間３５の固有振動数は低くなり、その固有
振動数が地震計３１の観測帯域内のものとなってしまう
ためである。Next, FIG. 4 shows the result of observing a horizontal ground motion (of FIG. 3) having a waveform as shown in FIG. 4 by the self-floating seafloor seismic observation apparatus shown in FIG. As shown in the figure, the waveform observed by the seismometer 31 of the conventional example is a waveform of the original waveform of the seismic motion shown in FIG. 4 and the waveform of the low natural frequency generated in the configuration of the conventional example. The waveform becomes a synthetic waveform, and the earthquake motion is not accurately observed in the conventional technique. This is because, as described above, due to the relationship between the length of the mounting stay 34 and the weight of the built-in device 33, the natural frequency between the pressure-resistant containers 35 is low, and the natural frequency is within the observation band of the seismometer 31. It is because it becomes.
【０００７】また、自己浮上式海底地震観測装置の重要
な特性として、海底より自動的に、または、外部からの
コマンド等により強制的にアンカ３８を切り離し、観測
装置本体が自己浮上するといった特性がある。そのた
め、耐圧容器３５内の構造物は軽量でなければならな
い。An important characteristic of the self-floating type ocean bottom seismic observation device is that the anchor 38 is automatically separated from the seafloor or forcibly separated by an external command or the like, and the main body of the observation device self-surfaces. is there. Therefore, the structure inside the pressure vessel 35 must be lightweight.
【０００８】しかしながら、上述したような内臓装置３
３において発生する低い固有振動数の振動を防止する方
法として、取り付けステー３４を強固なものとすると、
その取り付けステー３４の重量が重くなるため所望の浮
力が得られなくなってしまうといった問題点がある。そ
のため、取り付けステー３４は軽量のものを使用してい
たが、これでは既に説明したように、地震計３１におい
て低い固有振動数の波形が観測されてしまい、正確な地
震動の観測ができなくなってしまう。However, the internal organ 3 as described above
As a method for preventing the vibration of low natural frequency occurring in 3, the mounting stay 34 is made strong.
There is a problem that a desired buoyancy cannot be obtained because the weight of the mounting stay 34 becomes heavy. For this reason, the mounting stay 34 used a lightweight one. However, as described above, a waveform having a low natural frequency is observed in the seismometer 31 and accurate observation of seismic motion cannot be performed. .
【０００９】本発明は、上記問題点に鑑みてなされたも
のであり、内蔵装置と耐圧容器壁面との間に防振材を備
えた構成とすることにより、水平方向の地震動に対する
共振を抑え内蔵装置の固有振動数を高くすることで共振
ノイズを観測帯域外の周波数とし、正確な地震動の計測
を可能とすると共に軽量な自己浮上式海底地震観測装置
を提供することを目的とする。The present invention has been made in view of the above problems, and has a structure in which a vibration isolator is provided between a built-in device and a wall of a pressure-resistant container to suppress resonance against horizontal earthquake motion. It is an object of the present invention to provide a lightweight self-floating seafloor seismic observation device that enables accurate measurement of seismic ground motion by increasing the natural frequency of the device to make resonance noise a frequency outside the observation band.
【００１０】[0010]
【課題を解決するための手段】かかる目的を達成するた
めに、請求項１記載の発明によれば、海底で加わる圧力
に耐え得る耐圧容器内に、海底で発生した地震を観測す
るための内蔵装置を有する自己浮上式海底地震観測装置
において、地震により内蔵装置に生じる共振を防止する
防振材を内蔵装置と耐圧容器壁面間に有することを特徴
とする。According to the first aspect of the present invention, there is provided a pressure vessel capable of withstanding a pressure applied on the sea floor, for monitoring an earthquake generated on the sea floor. A self-floating seafloor seismic observation device having a device, characterized in that a vibration isolator for preventing resonance generated in the built-in device due to an earthquake is provided between the built-in device and the wall surface of the pressure vessel.
【００１１】請求項２記載の発明によれば、請求項１記
載の発明において、防振材は、内蔵装置と耐圧容器間に
おいて内蔵装置が水平方向に移動しないような位置に設
けられることを特徴とする。According to a second aspect of the present invention, in the first aspect of the invention, the vibration isolator is provided at a position between the built-in device and the pressure-resistant container so that the built-in device does not move in the horizontal direction. And
【００１２】請求項３記載の発明によれば、請求項１又
は２記載の発明において、防振材は、内蔵装置と耐圧容
器間において内蔵装置は鉛直方向に移動しないような位
置に設けられることを特徴とする。According to a third aspect of the present invention, in the first or second aspect of the invention, the vibration isolator is provided at a position between the built-in device and the pressure-resistant container such that the built-in device does not move in the vertical direction. It is characterized by.
【００１３】請求項４記載の発明は、海底で加わる圧力
に耐え得る耐圧容器内に、海底で発生した地震を観測す
るために内蔵装置を有する自己浮上式海底地震観測装置
において、内蔵装置の下面或いは上面を耐圧容器に固定
する取り付けステーと、内蔵装置と耐圧容器壁面との間
に、水平方向の地震動により内蔵装置に生じる共振を防
止するための防振材とを、有することを特徴とする。According to a fourth aspect of the present invention, there is provided a self-floating seafloor seismograph having a built-in device for observing an earthquake generated on the seabed in a pressure vessel capable of withstanding pressure applied on the seabed. Alternatively, there is provided a mounting stay for fixing the upper surface to the pressure-resistant container, and a vibration isolator between the built-in device and the wall of the pressure-resistant container for preventing resonance generated in the built-in device due to horizontal earthquake motion. .
【００１４】請求項５記載の発明は、請求項４記載の発
明において、防振材は、内蔵装置の側面を覆うように内
蔵装置と耐圧容器との間に設けられることを特徴とす
る。According to a fifth aspect of the present invention, in the fourth aspect, the vibration isolator is provided between the built-in device and the pressure-resistant container so as to cover a side surface of the built-in device.
【００１５】請求項６記載の発明は、請求項４記載の発
明において、防振材は、内蔵装置の上面及び下面の一部
並びに側面を覆うように内蔵装置と耐圧容器との間に設
けられることを特徴とする。According to a sixth aspect of the present invention, in the fourth aspect of the invention, the vibration isolator is provided between the built-in device and the pressure-resistant container so as to cover a part of an upper surface and a lower surface and a side surface of the built-in device. It is characterized by the following.
【００１６】請求項７記載の発明は、請求項１から６の
いずれかに記載の発明において、防振材は、軽量で加工
しやすいものによって構成されることを特徴とする。The invention according to claim 7 is characterized in that, in the invention according to any one of claims 1 to 6, the vibration isolator is made of a material that is lightweight and easy to process.
【００１７】[0017]
【発明の実施の形態】以下、本発明の実施の形態を添付
図面を参照しながら詳細に説明する。Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
【００１８】図１は、本発明の一実施形態における自己
浮上式海底地震観測装置の構成例を示した図である。図
１によれば、地震計１１及び波形記録装置１２は内臓装
置１３内に搭載されている。内臓装置１３は、取り付け
ステー１４を介して耐圧容器１５内に固定されている。
耐圧容器１５は、切離装置１６によってアンカ１８と接
続されている。ここで、アンカ１８に固定されている支
柱１７と耐圧容器１５は接触しているが、ネジなどでは
固定されていない。しかし、耐圧容器１５が不安定にな
らないように、切離装置１６は十分な張力をもって、耐
圧容器１５とアンカ１８をつなげている。FIG. 1 is a diagram showing a configuration example of a self-floating type ocean bottom seismic observation apparatus according to an embodiment of the present invention. According to FIG. 1, the seismometer 11 and the waveform recording device 12 are mounted in a built-in device 13. The built-in device 13 is fixed in a pressure-resistant container 15 via a mounting stay 14.
The pressure-resistant container 15 is connected to an anchor 18 by a separating device 16. Here, the support 17 fixed to the anchor 18 and the pressure-resistant container 15 are in contact with each other, but are not fixed by screws or the like. However, the disconnecting device 16 connects the pressure vessel 15 and the anchor 18 with sufficient tension so that the pressure vessel 15 does not become unstable.
【００１９】したがって、耐圧容器１５は、支柱１７上
にしっかりと固定されているため、海底の振動が正確に
地震計１１に伝達される。また、耐圧容器１５は、中が
空気で満たされており、海中を浮上するのに十分な浮力
を持っている。そのため、切離装置１６が作動すること
によって耐圧容器１５とアンカ１８とが切り離される
と、耐圧容器１５は、海底から海面へ向かってゆっくり
と浮上していく。Therefore, since the pressure vessel 15 is firmly fixed on the column 17, the vibration of the sea floor is transmitted to the seismometer 11 accurately. Further, the inside of the pressure-resistant container 15 is filled with air, and has sufficient buoyancy to float in the sea. For this reason, when the pressure-resistant container 15 and the anchor 18 are separated by the operation of the separating device 16, the pressure-resistant container 15 slowly floats from the seabed to the sea surface.
【００２０】さらに、本実施形態においては、内蔵装置
１３と耐圧容器１５壁面との間に防振材１９を設けてい
る。これにより、水平方向の地震動に対する内蔵装置の
共振（図１の）を大幅に抑えることが可能となる。こ
こで、防振材は、内蔵装置と耐圧容器間において内蔵装
置が水平方向及び鉛直方向に移動しないような位置に設
ける。Further, in this embodiment, a vibration isolator 19 is provided between the built-in device 13 and the wall surface of the pressure-resistant container 15. As a result, it is possible to significantly suppress the resonance (of FIG. 1) of the built-in device with respect to the horizontal earthquake motion. Here, the vibration isolator is provided at a position between the built-in device and the pressure-resistant container such that the built-in device does not move in the horizontal direction and the vertical direction.
【００２１】具体的には、少なくとも内蔵装置の側面を
覆うように内蔵装置と耐圧容器との間に防振材を設ける
ことで水平方向の地震動による共振を抑えることができ
るが、より好ましくは、内蔵装置の上面及び下面の一部
並びに側面を覆うように内蔵装置と耐圧容器との間に防
振材を設けることによりさらに地震動による内蔵装置の
共振を抑えることができる。また、装置自体の軽量化及
び構成の簡単化のため、防振材は軽くて且つ加工しやす
いものによって構成するとよい。Specifically, by providing an anti-vibration material between the built-in device and the pressure-resistant container so as to cover at least the side surface of the built-in device, resonance caused by horizontal seismic motion can be suppressed. By providing a vibration isolator between the built-in device and the pressure-resistant container so as to cover a part of the upper and lower surfaces and the side surface of the built-in device, resonance of the built-in device due to seismic motion can be further suppressed. Also, in order to reduce the weight of the device itself and simplify the configuration, it is preferable that the vibration isolator be made of a light and easy-to-process material.
【００２２】次に、同図に示す自己浮上式海底地震観測
装置によって、図２のに示したような波形をもつ水平
方向の地震動（図１の）を観測した結果を図２のに
示す。本実施形態によれば、上述したように上記防振材
１９によって内蔵装置１３の共振を大幅に抑えることが
できるため内蔵装置１３の固有振動数は高くなり地震計
１１の観測帯域外の周波数となる。よって、本実施形態
において地震計１１によって観測される波形は、図２の
に示されるように、図２のに示した地震動本来の波
形と同一の波形となり、正確な地震動の計測が可能とな
る。Next, FIG. 2 shows the result of observing a horizontal ground motion (of FIG. 1) having a waveform as shown in FIG. 2 by the self-floating type ocean bottom earthquake observation apparatus shown in FIG. According to the present embodiment, as described above, the resonance of the built-in device 13 can be greatly suppressed by the vibration isolating material 19, so that the natural frequency of the built-in device 13 is increased, and the frequency outside the observation band of the seismometer 11 is increased. Become. Therefore, the waveform observed by the seismometer 11 in the present embodiment is the same as the original waveform of the seismic motion shown in FIG. 2 as shown in FIG. 2, and accurate measurement of the seismic motion is possible. .
【００２３】[0023]
【発明の効果】以上の説明より明らかなように、本発明
によれば、内蔵装置と耐圧容器壁面との間に防振材を備
えた構成としているため、水平方向の地震動に対する共
振を抑え内蔵装置の固有振動数を高くすることで共振ノ
イズが地震計の観測帯域外の周波数となり、正確な地震
動の計測が可能となると共に軽量な自己浮上式海底地震
観測装置を提供することができる。As is apparent from the above description, according to the present invention, since the vibration isolator is provided between the built-in device and the wall surface of the pressure-resistant container, resonance against horizontal earthquake motion is suppressed. By increasing the natural frequency of the device, the resonance noise becomes a frequency outside the observation band of the seismometer, thereby enabling accurate measurement of seismic motion and providing a lightweight self-floating seafloor seismograph.
【図１】本発明の一実施形態における自己浮上式海底地
震観測装置の構成例を示した図である。FIG. 1 is a diagram illustrating a configuration example of a self-floating type ocean bottom seismic observation apparatus according to an embodiment of the present invention.
【図２】本発明の実施形態における自己浮上式海底地震
観測装置により水平方向の地震動を観測した結果を示し
た図である。FIG. 2 is a diagram showing a result of observing a horizontal ground motion by a self-floating seafloor seismograph according to the embodiment of the present invention.
【図３】従来例における自己浮上式海底地震観測装置の
構成例を示した図である。FIG. 3 is a diagram showing a configuration example of a conventional self-floating type ocean bottom seismic observation apparatus.
【図４】従来例における自己浮上式海底地震観測装置に
より水平方向の地震動を観測した結果を示した図であ
る。FIG. 4 is a diagram showing a result of observing a horizontal ground motion by a self-floating seafloor seismograph in a conventional example.
１１ 地震計 １２ 波形記録装置 １３ 内蔵装置 １４ 取り付けステー １５ 耐圧容器 １６ 切離装置 １７ 支柱 １８ アンカ １９ 防振材 Reference Signs List 11 seismometer 12 waveform recording device 13 built-in device 14 mounting stay 15 pressure-resistant container 16 separating device 17 support 18 anchor 19 vibration-proof material
Claims (7)
に、海底で発生した地震を観測するための内蔵装置を有
する自己浮上式海底地震観測装置において、 地震により前記内蔵装置に生じる共振を抑える防振材を
前記内蔵装置と前記耐圧容器壁面間に有することを特徴
とする自己浮上式海底地震観測装置。1. A self-floating seafloor seismograph having a built-in device for observing an earthquake generated on the sea floor in a pressure vessel capable of withstanding pressure applied on the seabed, wherein resonance generated in the built-in device due to an earthquake is suppressed. A self-floating seafloor seismic observation device comprising a vibration isolator between the built-in device and the pressure vessel wall.
水平方向に移動しないような位置に設けられることを特
徴とする請求項１記載の自己浮上式海底地震観測装置。2. The self-floating seafloor earthquake according to claim 1, wherein the vibration isolator is provided at a position between the built-in device and the pressure-resistant container so that the built-in device does not move in a horizontal direction. Observation equipment.
鉛直方向に移動しないような位置に設けられることを特
徴とする請求項１又は２記載の自己浮上式海底地震観測
装置。3. The self-floating type according to claim 1, wherein the vibration isolator is provided at a position between the built-in device and the pressure-resistant container such that the built-in device does not move in a vertical direction. Ocean bottom seismometer.
に、海底で発生した地震を観測するために内蔵装置を有
する自己浮上式海底地震観測装置において、 前記内蔵装置の下面或いは上面を前記耐圧容器に固定す
る取り付けステーと、 前記内蔵装置と前記耐圧容器壁面との間に、水平方向の
地震動により前記内蔵装置に生じる共振を抑えるための
防振材とを、 有することを特徴とする自己浮上式海底地震観測装置。4. A self-floating seafloor seismograph having a built-in device for observing an earthquake generated on the sea floor in a pressure vessel capable of withstanding a pressure applied on the sea floor, wherein a lower surface or an upper surface of the built-in device is pressure-resistant. A mounting stay fixed to a container, and a vibration isolator between the built-in device and the wall surface of the pressure-resistant container for suppressing resonance generated in the built-in device due to a horizontal earthquake motion. Seafloor seismometer.
圧容器との間に設けられることを特徴とする請求項４記
載の自己浮上式海底地震観測装置。5. The self-floating seafloor seismograph according to claim 4, wherein the vibration isolator is provided between the built-in device and the pressure-resistant container so as to cover a side surface of the built-in device. .
うに前記内蔵装置と前記耐圧容器との間に設けられるこ
とを特徴とする請求項４記載の自己浮上式海底地震観測
装置。6. The device according to claim 4, wherein the vibration isolator is provided between the built-in device and the pressure-resistant container so as to cover a part of an upper surface and a lower surface and a side surface of the built-in device. Self-floating seafloor seismometer.
とする請求項１から６のいずれかに記載の自己浮上式海
底地震観測装置。7. The self-floating seafloor seismograph according to claim 1, wherein the vibration isolator is made of a material that is lightweight and easy to process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000090703A JP2001272475A (en) | 2000-03-27 | 2000-03-27 | Self-floating type submarine earthquake observing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000090703A JP2001272475A (en) | 2000-03-27 | 2000-03-27 | Self-floating type submarine earthquake observing apparatus |
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| Publication Number | Publication Date |
|---|---|
| JP2001272475A true JP2001272475A (en) | 2001-10-05 |
Family
ID=18606277
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000090703A Pending JP2001272475A (en) | 2000-03-27 | 2000-03-27 | Self-floating type submarine earthquake observing apparatus |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013065574A1 (en) | 2011-10-31 | 2013-05-10 | 栄研化学株式会社 | Method for detecting target nucleic acid |
-
2000
- 2000-03-27 JP JP2000090703A patent/JP2001272475A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013065574A1 (en) | 2011-10-31 | 2013-05-10 | 栄研化学株式会社 | Method for detecting target nucleic acid |
| KR20140091562A (en) | 2011-10-31 | 2014-07-21 | 에이껜 가가꾸 가부시끼가이샤 | Method for detecting target nucleic acid |
| US10876160B2 (en) | 2011-10-31 | 2020-12-29 | Eiken Kagaku Kabushiki Kaisha | Method for detecting target nucleic acid |
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