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1. 发明专利

JPH04359182A PARAMETRIC LOW-FREQUENCY SOUND SOURCE 失效
公开(公告)号：JPH04359182A
公开(公告)日：1992-12-11
申请号：JP16107891
申请日：1991-06-04
申请人： HITACHI SHIPBUILDING ENG CO , WATANABE YOSHIAKI
发明人： WATANABE YOSHIAKI , KITAMURA AKIHARU , OGURA AKITERU
IPC分类号： G01S7/524 , G01S7/52 , H04R3/00
摘要： PURPOSE:To provide a parametric low-frequency sound source capable of improving the conversion efficiency from a high-frequency primary wave to a low-frequency secondary wave and being used in a moving object. CONSTITUTION:A transmitter 1 driven by a parametric transmitting system utilizing the nonlinear effect of acoustic waves and a solid acoustic matching layer 3 containing a bubble group in a material and arranged on the radiation path of the acoustic waves from the transmitter 1 are provided.

2. 发明专利

JPH0663717B2 失效
公开(公告)号：JPH0663717B2
公开(公告)日：1994-08-22
申请号：JP32507887
申请日：1987-12-21
申请人： HITACHI SHIPBUILDING ENG CO
发明人： NEGISHI RYOHEI , OGURA AKITERU , TAKI KENICHI , SAITO MINORU
IPC分类号： F41F3/00 , F41G9/00 , F42B23/16

3. 发明专利

JPH01167598A ANTIAIRCRAFT WEAPON 失效
公开(公告)号：JPH01167598A
公开(公告)日：1989-07-03
申请号：JP32507887
申请日：1987-12-21
申请人： HITACHI SHIPBUILDING ENG CO
发明人： NEGISHI RYOHEI , OGURA AKITERU , TAKI KENICHI , SAITO MINORU
IPC分类号： F41F3/00 , F41G9/00 , F42B23/16
摘要： PURPOSE:To destroy a flying object in an aerial area in an unmanned operation by shooting, upon detection of the entry of the flying object into the specific aerial area, a bomb toward this area by a firing means. CONSTITUTION:On the periphery of a launching pad 1, which is circular in a plan view, there are provided four spigots 2 for warheads, each spigot provided with a warhead 3 and arranged circumferentially at equal intervals, and with a control device 4 for the warheads in the middle. For example, a shell with a fuse, whether by contact or time or otherwise, is in use for the warhead 3. The control device 4 for the warheads is housed in a cylindrical casing 5 which is closed at both ends, and has an opening 6 for transmission of microwaves in the middle at the top and has three microphones attached at equal intervals around the opening 6. On the basis of signals outputted and received by the microphones an approaching aircraft detection circuit 8 in the casing 5 detects the approach to and entry into an aerial area and thereupon supplies an invasion detection circuit 9 with electric power from a battery 10 for a specific time set in a timer. Then an oscillator is actuated to release the warheads.

4. 发明专利

JPH01175096A FIELD MAINTENANCE DEVICE 失效
公开(公告)号：JPH01175096A
公开(公告)日：1989-07-11
申请号：JP33265287
申请日：1987-12-29
申请人： HITACHI SHIPBUILDING ENG CO
发明人： HASHIGUCHI SHINJI , SHIMAMOTO YOSHITOSHI , OGURA AKITERU
IPC分类号： G01V11/00 , G08B15/00 , G08B23/00
摘要： PURPOSE:To accurately decide the kind, advancing direction and route of a substance by detecting the approach and invasion of a substance to an object to be guarded by using detecting signals outputted from plural sensors for light, sound, vibration, etc. CONSTITUTION:Respective sensors 1-5 for light, sound, vibration, etc., are separated into plural systems in accordance with necessity and connected. Detecting signals from respective sensors 1-5 are processed so as to specify respective sensors based on encoding of a processor 6 and always transmitted to a receiver/encoder 13 by radio waves or a line through a transmitter 7 and the decoded data of detecting signals from respective sensors 1-5 are inputted to a computer 14. When a doubtful substance is approached or invaded, the computer 14 detects its approach and invasion from the decoded data and displays the range of the generating position and its generating time as an alarm.

5. 发明专利

JPH01101491A SUBMARINE BURIED BODY SURVEYING DEVICE 失效
公开(公告)号：JPH01101491A
公开(公告)日：1989-04-19
申请号：JP26052987
申请日：1987-10-15
申请人： HITACHI SHIPBUILDING ENG CO
发明人： OGURA AKITERU , MAEDA KOZO , YAMADA YUTAKA
IPC分类号： B63C11/48 , G01S7/524 , G01V1/00
摘要： PURPOSE:To move a surveying device freely in the sea without any communication trouble by sending a low-frequency narrow-directivity acoustic beam from a small-sized parametric array sender to the bottom of the sea and receiving a reflected wave from a submarine buried body by a receiver. CONSTITUTION:When a communication cable buried in the sea bottom is inspected, the main body 1 is moved to nearby the burying position and an acoustic sensor 3 is driven to send acoustic beams from two parametric array senders alternately; and thrusters 5, 7, and 9 are so controlled as to receive reflected waves from the cable by two receivers, and the main body 1 is moved. When one receiver receives a reflected wave from the cable, the thrusters 5, 7, and 9 are so controlled as to increase the reflected waves from both receives, thereby moving the main body 1. The horizontal moving direction of the main body 1 is changed to the direction of the cable and the inspection is performed.

6. 发明专利

JPH01210800A SCATTERABLE LAND MINE 失效
公开(公告)号：JPH01210800A
公开(公告)日：1989-08-24
申请号：JP3631688
申请日：1988-02-18
申请人： HITACHI SHIPBUILDING ENG CO
发明人： OGURA AKITERU , ENOMOTO TOSHIAKI
IPC分类号： F42B23/04
摘要： PURPOSE:To make sure the movements of a land mine which keeps its end faces always in the direction of up-and-down by providing the upper and lower faces of the land mine which has a circular cross section and the thickness shorter than the diameter with an ultra sonic wave receiver which sends ultrasonic waves in the vertical direction and dropping the land mine from a moving body always with the upper and lower end faces lying in the up-and-down direction. CONSTITUTION:A scatterable mine has a shape of cylinder which has the height shorter than the diameter. Consequently, when it is dropped form a helicopter, etc. either end face of the upper and lower end faces upwards when it lands the earth. Those upper and lower end faces are provided with ultrasonic wave transmitting and receiving devices 11 and 21 respectively, and the ultrasonic waves are sent perpendicularly to the end face and outwards. The echo of an ultrasonic wave that is sent is limited in a certain range and this range is the range of detection. For instance since the transmitting and receiving device 21 on the lower side is in contact with the ground surface, the echo is made ineffective and the transmitting and echo of receiving device 11 on the upper side becomes ineffective when the distance to an object which is supposed to be subject to the mine explosion is over the range of detection. As a result, only when an object to be hit by mine comes in the range of detection the explosive is actuated and the destruction of the object becomes certain.

7. 发明专利

JPH01111200A STATIONARY TYPE TORPEDO 失效
公开(公告)号：JPH01111200A
公开(公告)日：1989-04-27
申请号：JP26772987
申请日：1987-10-22
申请人： HITACHI SHIPBUILDING ENG CO
发明人： OGURA AKITERU , ENOMOTO TOSHIAKI
IPC分类号： F42B22/00 , F42B22/06
摘要： PURPOSE: To obtain a stationary mine wherein a false operation due to a reflected wave of an acoustic wave hardly occurs, by equipping a detecting means with a directional piezoelectric type acoustic wave receiver which has piezoelectric rubber disposed horizontally and has high sensitivity to the vertical direction. CONSTITUTION: A stationary mine is equipped with a casing 1, an ignition device 2, an arming device 3, a bursting charge 4 and a battery 5 and with a directional piezoelectric type acoustic wave receiver 6 which is provided on the upper side of the casing 1 and which is made of piezoelectric rubber and has high sensitivity to the vertical direction. When an object of explosion comes near to the stationary mine, an operation signal is outputted from a signal processing circuit 13 of a magnetic sensor 12 and a contact 14a of a relay 14 turns ON. When the object of explosion comes to a position right above the stationary mine, an operation signal is outputted from a signal processing circuit 10 of the acoustic wave receiver 6 and a contact 11a of a relay 11 turns ON. When both of the contacts 11a and 14a turn ON, the voltage of the battery 5 is impressed on an igniter of a detonator 15 through the contacts 11a, 14a and 19a, and the detonator 15, a booster 16 and the bursting charge 4 burst up, whereby the object of explosion is exploded.

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