JP5198932B2 - Search system for victims - Google Patents

Description

  The present invention relates to a search system for searching for a victim who has suffered from an earthquake or other disaster.

  When disasters such as earthquakes occur, the first requirement for lifesaving is to rescue victims buried in collapsed buildings as quickly as possible. For this purpose, a quick search for victims is essential.

For this, a cardiograph monitor device described in Patent Document 1 below has been proposed. This cardiograph monitoring device is attached to the arm of a victim and detects the bullet of the victim.
JP 2004-275563 A

  By the way, according to the above-mentioned cardiogram monitoring device, even if the victim can be rescued based on the diagnosis of the survival, such a diagnosis is carried out by mounting the cardiograph monitoring device on the arm of the victim. Is an essential prerequisite.

  However, when a disaster such as that described above occurs, to rescue a victim buried in a collapsed building or the like, it is first necessary to search where the victim is buried. The places where victims are buried are often dark, and it is not easy to search for victims in such places.

  For this reason, even if the rescuer is attached to the above-mentioned cardiograph monitor device, it is difficult to rescue the victim quickly if the rescuer cannot find the place where the victim is buried.

  In view of the above, the present invention provides a search system for a victim who can quickly search for the victim even if he / she is away from the victim who suffered from an earthquake or other disasters. The purpose is to provide.

  In solving the above-mentioned problems, the present inventors, after various studies, have found that the heartbeat or respiration of the victim is an elastic bullet (mechanical vibration) that is an elastic vibration (mechanical vibration) of cardiac muscles such as the myocardium or respiratory muscles. As information, we focused on the phenomenon of regular propagation from the victim's body to the outside. Based on this attention, the present inventors have come to the conclusion that, based on the above-mentioned bullet information from the victim, the victim can be searched quickly even if they are away from the victim.

Based on this conclusion, the search system for victims according to the present invention is as follows.
Metallic main block body to be embedded in the ground plate (G) and (30),
A metal sub-block body (40) embedded in the ground at a predetermined interval so as to face the metal main block body;
A main sensor main body (11) placed on the upper surface of the metal main block body, and extends from the bottom wall of the main sensor main body and is fastened so as to be rotatable along the upper surface of the metal main block body. A reference flange (12) and a reverse flange extending from the bottom wall of the main sensor body in a direction opposite to the reference flange, wherein the reference flange is a circle centered on a fastening portion of the reference flange with respect to the upper surface of the metal main block body. It has a reverse-facing flange (13) that is movably fastened along a main positioning groove (33) formed on the upper surface of the metal main block body so as to form an arc, and is affected by a disaster such as an earthquake. Main three-axis high-sensitivity acceleration sensor (10) for detecting elastic vibration propagating from the body of the affected victim through the ground and the metal main block body as acceleration through one of the three detection axes in the main sensor body When,
A sub sensor main body (21) placed on the upper surface of the metal sub block body, and a bottom wall of the sub sensor main body extending so as to face the reverse flange of the main triaxial high-sensitivity acceleration sensor A one-side opposed flange that is connected to the reverse flange via a connecting bar (50) so as not to be relatively displaceable. The fastening portion of the reference flange of the main triaxial high-sensitivity acceleration sensor with respect to the upper surface of the metal main block body A one-side opposing flange (22) fastened movably along a one-side sub-positioning groove (42) formed on the upper surface of the metal sub-block body so as to have an arc shape as a center, and the sub-sensor body The other side opposing flange that extends in the opposite direction to the one side opposing flange from the bottom wall of the base, and the fastening portion of the reference flange to the upper surface of the metal main block body through the one side auxiliary positioning groove The other side opposing flange (23) fastened movably along the other side auxiliary positioning groove (43) formed on the upper surface of the metal subblock body so as to have an arc shape as a center; A sub triaxial high-sensitivity acceleration sensor (20) for detecting elastic vibration propagating from the victim's body through the ground and the metal sub block body as acceleration through the three detection axes of the sub sensor body; ,
Primary and secondary 3 Jikudaka sensitivity acceleration frequency analysis means for forming a frequency analysis data representing the relationship between one of the peripheral and wavenumber analysis acceleration level and frequency of the acceleration data corresponding to the acceleration detected by the sensor and (220) ,
By searching whether including frequency analysis component the frequency analysis data corresponding to the elastic oscillations of the affected person, search means for searching the existence of victims to survive (240,250,251, 254).

In this way, the metal main block body and the metal sub block body are embedded in the ground so that they face each other, and the main triaxial high-sensitivity acceleration sensor rotates on the upper surface of the metal main block body at the reference flange It can be fastened and is fastened to the upper surface of the metal main block body so as to be movable along the main positioning groove with a reverse flange, and the auxiliary 3-axis high-sensitivity acceleration sensor is replaced with the main 3-axis high-sensitivity acceleration sensor. The opposite-side flange and the other-side and opposite-flange connected to the opposite-direction flange through a connecting bar so as not to be relatively displaced are fastened so as to be movable along the one-side and other-side sub-positioning grooves.
Thus, even if a victim affected by a disaster such as an earthquake is buried in a collapsed house or rubble, for example, the metal main block body and the metal subblock body configured as described above are collapsed. After burying in the ground near the rubble, etc., move the sub triaxial high-sensitivity acceleration sensor along the sub positioning grooves on the one side and the other side on the top surface of the metal sub block body, The main three-axis high-sensitivity acceleration sensor is moved and adjusted along the main positioning groove through the connecting bar with reference to the fastening portion of the reference flange with respect to the upper surface of the body.
After that, the main three-axis high-sensitivity acceleration sensor detects the elastic vibration propagating from the victim's body through the ground and the metal main block body as acceleration through one of the three detection axes in the main sensor body. At the same time, when the elastic vibration propagating through the ground and the metal sub-block body from the body of the sub three-axis high-sensitivity acceleration sensor victim is detected as acceleration through any of the three detection axes in the sub sensor body, frequency analyzing means, to form the main and the frequency analysis data representing the relationship between one of the peripheral and wavenumber analysis acceleration level and frequency of the acceleration data corresponding to the detected acceleration of the sub-three Jikudaka sensitivity acceleration sensor.
Then, the presence or absence of a surviving survivor is searched by searching for whether or not the frequency analysis data includes a frequency analysis component corresponding to the elastic vibration of the survivor. As a result, if the frequency analysis data includes a frequency analysis component corresponding to the elastic vibration of the victim, the existence of the survivor is searched.

Thus, metallic main block body as described above, the metallic sub-block body, the main three-axis high sensitive acceleration sensor, the original sub-3 consists of the axis sensitive acceleration sensor and the connecting bar arrangement, from the body of the victim The elastic vibration propagating to the outside passes through the ground and the metal main block body and propagates to the main triaxial high-sensitivity acceleration sensor, and also propagates through the ground and metal sub-block body to the sub three-axis high sensitivity acceleration sensor. Therefore, even if it is away from the victim who was buried in collapsed houses or rubble, the main and secondary three-axis high-sensitivity acceleration sensors can be used to detect the elastic vibration of the victim via each of the three detection axes. By detecting the acceleration, it is possible to quickly search for the affected person even if he / she is away from the affected person who suffered from the earthquake and other various disasters.

According to a second aspect of the present invention, in the search system for a victim according to the first aspect,
Exploration search means,
When searching for the existence of a surviving survivor by searching that the frequency analysis data includes the frequency analyzing component corresponding to the elastic vibration of the survivor, filtering both the acceleration data, the surviving disaster Filtering means (252) for extracting a person's heartbeat waveform as each heartbeat waveform data;
The surviving victims of cardiac or et metallic main block body through main 3 Jikudaka sensitivity heartbeat components reaching the acceleration sensor and the surviving victims sub 3 through a metal sub-block body from the heart of Jikudaka sensitivity acceleration the difference in arrival time period between the heart beats Ingredient reaching the sensor, based on the heart beat waveform corresponding to each other in each heartbeat waveform data, arrival time difference calculating means for calculating a reaching time difference between (253),
While the sub-three-axis sensitive acceleration sensor is moved along at the upper surface of the metallic sub-block body auxiliary positioning groove of the one side and the other side, the fastening portion of the reference flange with respect to the upper surface of the metallic main block body vertical main 3 Jikudaka sensitive acceleration sensor to the reference for the line connecting the three-axis sensitive acceleration sensor of the main come with the arrival time difference becomes zero and the sub by moving adjustment via the connecting bar along the main positioning groove Position determining means (261) for determining that the surviving victim is located on a bisector.

Thus, the heartbeat waveform of the surviving victim is extracted as each heartbeat waveform data by the filtering process of the both acceleration data, and the main three-axis high-sensitivity acceleration sensor is passed through the metal main block body from the surviving victim's heart. Each heartbeat waveform data corresponds to the difference in arrival time between the heartbeat component arriving at the heartbeat component and the heartbeat component arriving at the sub triaxial high-sensitivity acceleration sensor through the metal sub-block body from the surviving victim's heart Based on each heartbeat waveform to be calculated as an arrival time difference, while moving the auxiliary 3-axis high-sensitivity acceleration sensor on the upper surface of the metallic sub-block body along the auxiliary positioning grooves on the one side and the other side, By adjusting the movement of the main triaxial high-sensitivity acceleration sensor along the main positioning groove through the connecting bar with reference to the fastening portion of the reference flange with respect to the upper surface of the block body Serial arrival time difference victims of the surviving perpendicular bisector with respect to primary and secondary of a three-axis sensitive line connecting the acceleration sensor when it becomes zero is determined to be located.

Here, when the arrival time difference as described above becomes zero, victims of heart and main and each line and the main and sub-three-axis sensitive pressure line connecting the each of the secondary of a three-axis sensitive acceleration sensor for survival The line connecting the speed sensors forms an isosceles triangle. Therefore, the above-mentioned perpendicular bisector corresponds to a perpendicular bisector with respect to the base of the isosceles triangle. As a result, the main and according to the vertical bisector for the sub-three-axis sensitive connecting acceleration sensor lines, primary and secondary three victims to survive when arrival time difference as described above becomes zero and the presence direction of the axis sensitive acceleration sensor correctly can be easily identified.

According to a third aspect of the present invention, in the search system for victims according to the second aspect,
Angle with respect to a line connecting one and 3 Jikudaka sensitivity acceleration sensor lines of primary and secondary connecting victims of cardiac and primary and secondary of a three-axis sensitive acceleration sensor for the survival in the the vertical bisector Where α is α, the search means calculates the distance from the midpoint of the line connecting the main and sub three-axis high-sensitivity acceleration sensors to the surviving victim based on the predetermined interval × (½) × tan α. A distance calculating means for calculating is provided.

According to this, based on the principle of the above-mentioned isosceles triangle, the angle α corresponds to the base angle of the isosceles triangle. Accordingly, a predetermined interval × (1/2) as described above on the basis of the × tan [alpha, can be positioned correctly and easily identified from primary and secondary of a three-axis sensitive acceleration sensor victims to survive.

Moreover, according to the description of Claim 4, this invention is the search system for victims as described in any one of Claims 1-3,
Storage means for storing a predetermined elastic vibration frequency component for identifying human survival out of elastic vibration characteristics propagating from at least one of the human heart system and respiratory system to the outside of the human body as cardiac data. prepare for,
Search means are
Extraction means (240) for extracting the frequency analysis component in the frequency analysis data as an extracted vibration frequency component;
Determination means (250) for determining whether the bullet data matches the extracted vibration frequency component by the extraction means,
It is characterized in that it is determined that there is a survivor on the basis of the determination by the determining means that the cardiac data matches the extracted vibration frequency component.

  By comprising in this way, the effect of the invention as described in any one of Claims 1-3 can be improved further.

Moreover, according to the description of Claim 5, this invention is the search system for victims of Claim 4,
The predetermined elastic vibration frequency component of the ambulatory data includes a heart rate frequency component of 0.32 (Hz) and a human heart rate frequency component specified by a predetermined heart rate peak corresponding thereto, and a respiration frequency of 1.1 ( Hz) and a human respiration frequency component specified by a predetermined respiration peak corresponding thereto.

  Thereby, the effect of the invention of claim 4 can be achieved more specifically.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows the correspondence with the specific means as described in embodiment mentioned later.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an embodiment of a search system for a victim according to the present invention. The search system includes a detection device S and a notebook personal computer PC (hereinafter also referred to as a notebook personal computer PC).

  The detection device S has a device main body Sa. The device main body Sa, as shown in FIGS. 2 and 3, includes both acceleration sensors 10 and 20 and rectangular metal-shaped block bodies 30 and 40. And a metal connecting bar 50. In addition, as for each formation material of the block bodies 30 and 40 and the connection bar | burr 50, light metals, such as aluminum, are preferable among metals from the ease of carrying.

  The acceleration sensor 10 has a sensor body 11 and both flanges 12 and 13. As shown in FIGS. 2 and 3, both the flanges 12, 13 are configured by extending the bottom wall of the sensor main body 11 to the left and right sides. The through holes 12a and 13a are formed as shown in FIG.

  On the other hand, the acceleration sensor 20 includes a sensor main body 21 and both flanges 22 and 23. As shown in FIGS. 2 and 3, both the flanges 22 and 23 are configured by extending the bottom wall of the sensor body 21 to the left and right sides. The through holes 22a and 23a are formed as shown in FIG.

  The block body 30 has a rectangular parallelepiped base 30a and an upper plate 30b. As can be seen from FIG. 2, the upper plate 30b is fastened to the base 30a by four bolts 31 from its upper surface. Has been. The upper plate 30b has a female screw hole 32 and an arc-shaped positioning groove 33, and the female screw hole 32 is formed in the upper plate 30b in a penetrating manner from the upper left side as shown in FIG. . Here, the female screw hole portion 32 is formed in the central portion in the vertical direction shown in FIG. 2 in the upper left side portion of the upper plate 30b.

  The positioning groove 33 is formed to penetrate along the upper surface of the upper plate 30b so as to have an arc shape centering on the female screw hole portion 32 and to have an inverted T-shaped cross section from the right upper surface portion into the upper plate 30b. . Here, the positioning groove portion 33 is formed with a narrow groove portion 33 a communicating with each other and a wide groove portion 32 b wider than the narrow groove portion 33 a vertically in the upper plate 32. The narrow groove portion 33a is located immediately above the central portion in the width direction of the wide groove portion 33b at the central portion in the width direction.

  On the other hand, the block body 40 has a rectangular parallelepiped base 40a and an upper plate 40b. As can be seen from FIG. 2, the upper plate 40b is attached to the base 40a from its upper surface by four bolts 41. It is fastened. The upper plate 40b has both arc-shaped positioning groove portions 42 and 43. The both arc-shaped positioning groove portions 42 and 43 connect the two acceleration sensors 10 and 20 to the block bodies 30 and 40 via a connecting bar 50 as described later. When assembled to the upper plate 40b, the upper plate 40b is formed to penetrate in an inverted T shape from the upper surface side so as to form an arc shape with the female screw hole 32 of the upper plate 30b of the block body 30 as the center. However, the arc-shaped positioning groove portion 42 is formed to be located on the left side of the arc-shaped positioning groove portion 43.

  Here, the positioning groove portion 42 is formed with a narrow groove portion 42a communicating with each other and a wide groove portion 42b wider than the narrow groove portion 42a in the upper plate 40b. The positioning groove 43 is formed with a narrow groove 43a communicating with each other and a wider groove 43b wider than the upper and lower grooves 40b in the upper plate 40b. The narrow groove portion 42a is located at the center in the width direction and immediately above the center portion in the width direction of the wide groove portion 42b. The narrow groove portion 43a is located at the center portion in the width direction of the wide groove portion 43b. It is located directly above the center in the width direction.

  Both acceleration sensors 10 and 20 are assembled together with the connecting bar 50 in the following manner with respect to the block bodies 30 and 40 configured as described above. That is, the acceleration sensor 10 is placed on the upper surface of the upper plate 30b of the block body 30 with both flanges 12 and 13 positioned on both the left and right sides of the sensor body 11, and the flange 12 of the acceleration sensor 10 passes through it. The bolt 14 is fastened to the female screw hole 32 of the upper plate 30b through the hole 12a, and is assembled to the upper plate 30b.

  The flange 13 of the acceleration sensor 10 is assembled to the positioning groove 33 of the upper plate 30b by the bolt 15 and the nut 16 together with the one end 51 of the connecting bar 50 as follows. That is, the bolt 15 is inserted into the positioning groove 33 from the narrow groove 33a to the wide groove 33b through the through hole 51a formed in the one end 51 of the connecting bar 50 and the through hole 13a of the flange 13 of the acceleration sensor 10. Thus, the nut 16 positioned in the wide groove portion 33b is fastened. Thereby, the flange 13 is assembled together with the one end 51 of the connecting bar 50 in the positioning groove 33 of the upper plate 30b. Note that the nut 16 has an outer diameter shape that is restricted in rotation within the wide groove portion 33 b when fastened to the bolt 15.

  On the other hand, the acceleration sensor 20 is placed on the upper surface of the upper plate 40b of the block body 40 with both flanges 22 and 23 positioned on the left and right sides of the sensor body 21, and the flange 22 of the acceleration sensor 20 is connected to the connecting bar. Along with the other end 52 of 50, the bolt 24 and the nut 25 are assembled to the positioning groove 42 of the upper plate 40b as follows. That is, the bolt 24 passes through the through hole 52a formed in the other end 52 of the connecting bar 50 and the through hole 22a of the flange 22 of the acceleration sensor 20, and enters the positioning groove 42 from the narrow groove 42a to the wide groove 42b. The nut 25 is inserted and fastened to the nut 25 located in the wide groove portion 42b. Thereby, the flange 22 is assembled together with the other end portion 52 of the connecting bar 50 in the positioning groove portion 42 of the upper plate 40b. The nut 25 has an outer diameter shape that is restricted in rotation within the wide groove portion 42b when fastened to the bolt 24.

  The flange 23 of the acceleration sensor 20 is assembled to the positioning groove 43 of the upper plate 40b by the bolt 26 and the nut 27 as follows. That is, the bolt 26 is inserted into the positioning groove 43 through the through hole 23a of the flange 23 of the acceleration sensor 20 from the narrow groove 43a to the wide groove 43b, and fastened with the nut 27 positioned in the wide groove 43b. Has been. Thereby, the flange 23 is assembled | attached to the positioning groove part 43 of the upper board 40b. The nut 27 has an outer diameter shape that is restricted in rotation within the wide groove portion 43b when fastened to the bolt 26.

  As described above, in a state where the both acceleration sensors 10 and 20 are assembled together with the connecting bar 50 to the both block bodies 30 and 40, the both acceleration sensors 10 and 20 are firmly connected to each other via the connecting bar 50. The block bodies 30 and 40 are firmly assembled. In such a state, when adjusting the orientations of the two acceleration sensors 10, 20, the bolts 15, 24, 26 are adjusted so that the positions of the bolts 15, 24, 26 can be adjusted along the positioning grooves 33, 42, 43. Loosen 14, 15, 24, 26.

  In this state, if the acceleration sensor 20 is pushed upward or downward in FIG. 2 around the bolt 14, the bolts 15, 24, and 26 are moved upward or downward along the positioning groove portions 33, 42, and 43. The position is adjusted in an arc shape. Therefore, the position of the acceleration sensor 20 is adjusted in an arc shape upward or downward in the arc direction of the positioning groove portions 33, 42, 43 together with the connecting bar 50. At this time, the acceleration sensor 10 is rotated and adjusted together with the connecting bar 50 around the bolt 14.

  Both the acceleration sensors 10 and 20 described above are configured by a triaxial high sensitivity acceleration sensor. For this reason, the acceleration sensors 10 and 20 have three detection axes, that is, an X detection axis, a Y detection axis, and a Z detection axis, which are orthogonal to each other, in the sensor bodies 11 and 21, respectively. Thus, each of the acceleration sensors 10 and 20 uses elastic vibration propagating from the surroundings toward the installation position as acceleration through any of the above-described X detection axis, Y detection axis, and Z detection axis. Generated by detecting and converting to digital data. The elastic vibration is detected as an acceleration including not only the elastic vibration from the disaster victim but also various elastic vibrations that are disturbances. That is, this acceleration includes not only the acceleration based on the elastic vibration from the victim but also the acceleration component based on the disturbance.

  As shown in FIG. 1, the detection device S has both interfaces Sb and Sc. The interface Sb receives the acceleration detected by the acceleration sensor 10 via the cable 60a, processes the data, and takes notes as acceleration data. Output to PC. On the other hand, the interface Sc receives the acceleration detected by the acceleration sensor 20 via the cable 70a, processes the data, and outputs it as acceleration data to the notebook personal computer PC.

  However, in the present embodiment, a GID-SSS type high sensitivity seismometer manufactured by Mathematical Design Laboratory is adopted as the acceleration sensor 10 and the interface Sb constituting the three-axis high sensitivity acceleration sensor. Similarly, a GID-SSS type high-sensitivity seismometer manufactured by Mathematical Design Laboratory is adopted as the acceleration sensor 20 and the interface Sc constituting the three-axis high-sensitivity acceleration sensor. The 3-axis high-sensitivity acceleration sensor of the GID-SSS type high-sensitivity seismometer has a high resolution (for example, 1.197 (gal)) with respect to acceleration.

  The notebook personal computer PC has a computer main body 80, a keyboard 80a, and a display 80b. The computer main body 80 includes a CPU and a plurality of memories (not shown). The computer main body 80 is a predetermined computer according to the flowchart shown in FIG. 11 by the CPU under the operation of the keyboard 80a. Run the program. During this execution, the computer main body 80 uses the CPU to determine whether or not there is a surviving survivor (hereinafter referred to as surviving survivor) based on the output data via both interfaces Sb and Sc of the both acceleration sensors 10 and 20. Determination, a process for calculating the distance to the victim, a display control process for the display 80b, and the like. The search system is powered by a commercial power supply and is in an operating state.

  The plurality of memories described above include a RAM and a hard disk, and the RAM temporarily stores data processed by the CPU. The computer program is stored in advance on the hard disk so as to be readable.

  The display 80b is composed of a liquid crystal panel and a display drive circuit (not shown). The display 80b is driven by the display drive circuit on the liquid crystal panel under the control processing by the CPU to display data. Is displayed.

  In the present embodiment, determination frequency component data for determining a living victim as described below is further stored in the above-described hard disk so as to be readable in advance.

  If the victim at the time of the disaster is a survivor, as described above, the heartbeat or breathing of the victim is from the body of the victim as cardiac information that is the elastic vibration of the heart muscle such as the myocardium or the respiratory muscles. Propagate regularly to the outside. Therefore, based on such a phenomenon, the characteristics of the physical bullet information of a healthy subject were actually examined from the body motion characteristics of the subject lying on the table. The measurement of the body motion characteristics was performed using a body motion detector.

  Here, the schematic configuration of the body motion detection device will be described. The body motion detection device includes a body motion sensor 90 and a notebook computer 100 as shown in FIG. In the present embodiment, the BMS-21 type body motion sensor manufactured by Advance Co., Ltd. is employed as the body motion sensor 90. This body motion sensor is a high-sensitivity low-frequency pressure sensor that detects minute pressure changes.

  The body motion sensor 90 includes a sensor pad 90a containing air and a sensor body 90b. When the sensor pad 90a is pressed, the air contained in the sensor pad 90a generates a minute pressure change due to the pressing and is pumped from the sensor pad 90a into the air pipe 91. In the measurement, the sensor pad 90a is interposed between the body of the subject and the table. Along with this, the air contained in the sensor pad 90a is subjected to an elastic vibration (mechanical vibration) of the heart muscle such as the myocardium and the respiratory muscle from the subject's body. Make a change.

  The sensor main body 90b receives and detects a minute air pressure change of the internal air from the sensor pad 90a via the air pipe 91, converts it into a digital signal, and outputs it to the notebook computer 100 as a body movement voltage.

  The notebook computer 100 includes a computer main body 110, a keyboard 120, and a display 130. The computer main body 110 analyzes the body motion characteristics of the subject based on the body motion voltage from the sensor main body 90b via the cable 92 in accordance with the execution of the dedicated program under the operation of the keyboard 120. In this analysis processing, the body motion voltage is repeatedly sampled as sampling data, and these sampling data are subjected to waveform analysis, that is, respiratory waveform analysis and heartbeat waveform analysis in real time. Next, each of the results of the respiratory waveform analysis and the heartbeat waveform analysis is subjected to frequency analysis. As the dedicated program, a program (pulse) for the BMS-21 type body motion sensor is adopted.

  The results of the respiratory waveform analysis and its frequency analysis and the heartbeat waveform analysis and its frequency analysis performed in this way are the results controlled by the computer main body 110, the respiratory waveform data (see FIG. 5), and its frequency analysis waveform data (FIG. 6). Reference) and heartbeat waveform data (see FIG. 7) and its frequency analysis waveform data (see FIG. 8) are displayed on the display 130.

  Here, as shown in FIG. 5, the respiration waveform data is shown by a timing chart showing a temporal change in respiration voltage, and the frequency analysis data corresponding to the respiration waveform data is respiration as shown in FIG. The graph shows the relationship between voltage and breathing frequency. Further, the heartbeat waveform data is shown in a timing chart showing temporal changes in heartbeat voltage as shown in FIG. 7, and the frequency analysis data corresponding to the heartbeat waveform data is shown in FIG. And a graph showing the relationship between heart rate and heart rate.

  Therefore, according to the frequency analysis data of FIG. 6, it can be seen that the respiration voltage of the subject shows a peak P (respiration peak P) when the respiration frequency is 0.32 (Hz). Further, according to the frequency analysis data of FIG. 8, it can be seen that the heartbeat voltage of the subject shows a peak Q1 (heartbeat peak Q1) when the heartbeat frequency is 1.10 (Hz). In FIG. 8, the peak Q2 corresponds to the heartbeat frequency of 0.32 (Hz), and thus indicates the peak of the respiration voltage described above.

  In order to further confirm the above-described peak Q1, the electrocardiographic characteristics of the subject were measured using an electrocardiograph. In the present embodiment, as the electrocardiograph, a vital recorder 2 (Vital Recorder 2) using AB-611J type high-sensitivity bioamplifier manufactured by Nihon Kohden and waveform measurement software manufactured by Kissei Comtech is employed.

  Thus, as a result of measurement using the high-sensitivity bioamplifier and the vital recorder 2, the electrocardiographic data of the subject was obtained as an electrocardiogram representing temporal changes in the electrocardiographic voltage as shown in FIG. Further, when the electrocardiographic characteristics were subjected to frequency analysis, the frequency analysis data as a result of the frequency analysis was obtained as a graph representing the relationship between the electrocardiographic voltage and the heartbeat frequency as shown in FIG.

  Then, according to the frequency analysis result of FIG. 10, it was found that the electrocardiographic voltage shows a peak R when the heartbeat frequency is 1.1 (Hz). According to this, it can be seen that the peak R matches the peak Q1 of the heartbeat voltage shown in FIG. Thereby, it can be seen that the heartbeat voltage of the subject is correct at the peak at a frequency of 1.1 (Hz).

  Therefore, in the present embodiment, the frequency 0.32 (Hz) at the peak of the respiratory voltage and the frequency 1.1 (Hz) at the peak of the heartbeat voltage are used as the determination frequency component data in the hard disk of the computer main body 80. Is stored in advance.

  In the present embodiment configured as described above, for example, it is assumed that many houses have collapsed due to the occurrence of a huge earthquake. In such a state, many people are often buried in a number of collapsed houses and rubble accompanying them as victims whose location is unknown.

  For example, it is assumed that a certain house collapses and becomes a collapsed house as shown in FIG. Therefore, the search system is used to search for surviving victims who may have been buried under or in the collapsed house.

  First, in this search, the apparatus main body Sa of the search system is firmly buried in the ground G in the vicinity of the collapsed house as shown in FIG. 12 (see FIG. 3). Here, each of the acceleration sensors 10 and 20 is positioned along the surface of the ground G with its X detection axis and Y detection axis. At this time, the acceleration sensors 10 and 20 are fixed to the block bodies 30 and 40 so as to be parallel to each other toward the collapsed house on the X detection axis.

  In such a state, when the search system is in an activated state, when the survivor survives, the elastic vibration propagating from the victim's body to the outside propagates along the surface of the ground G and passes through both blocks. The two acceleration sensors 10 and 20 are reached via the bodies 30 and 40. At this time, the time when the elastic vibration reaches the acceleration sensors 10 and 20 is different from each other.

  Further, when the search system is activated as described above, the computer main body 80 of the personal computer PC causes the CPU to execute the predetermined computer program from the hard disk according to the flowchart of FIG. 11 by operating the keyboard 80a. Read and start executing.

  As described above, when the elastic vibration reaches each acceleration sensor 10, 20, each acceleration sensor 10, 20 receives the elasticity through at least one of its X detection axis, Y detection axis, and Z detection axis. Mechanical vibration is detected as acceleration.

  The acceleration detected in this way is output by the acceleration sensors 10 and 20 to the interfaces Sb and Sc via the cables 60a and 70a. The interfaces Sb and Sc process the detected acceleration from the acceleration sensors 10 and 20 and input the data as acceleration data to the computer main body 80 via the cables 60b and 70b.

  Then, acceleration data from the interfaces Sb and Sc are input to the computer main body 80 in step 200 of FIG. Next, acceleration data display processing is performed in step 210. Accordingly, acceleration data from the interfaces Sb and Sc are converted into display data and output to the display 80b. Thereby, each acceleration data is displayed on the display 80b as illustrated in FIG. Note that the acceleration data is shown in FIG. 13 as a timing chart showing temporal changes in acceleration voltage.

When the processing in step 210 is completed as described above, frequency analysis processing is performed in the next step 220. Here, each acceleration data in step 200 is subjected to frequency analysis as each frequency analysis data. Then, in step 230, each frequency analysis data is converted into display data and output to the display 80b. Thus, the frequency analysis data are as illustrated in FIG. 14, it is more displayed on the display 80 b. Here, the frequency analysis data of FIG. 14 shows the relationship between the acceleration voltage and the frequency. According to this, the acceleration voltage has shown each peak (refer each code | symbol q1, q2 in FIG. 14) in each frequency 0.32 (Hz) and 1.1 (Hz), respectively.

  After step 230, level extraction processing is performed in step 240. In this level extraction process, both levels in each frequency analysis data (both first and second levels) are determined as frequencies 0.32 (Hz) and 1.12 of determination frequency component data stored in the hard disk. Based on (Hz), each vibration frequency component is extracted from each frequency analysis data.

  In step 250, it is determined whether each of the first and second levels extracted in this way is a peak. Here, both the above-mentioned first levels are levels corresponding to a frequency of 0.32 (Hz), respectively, and are specified by the peak q1 according to FIG. Moreover, both the above-mentioned 2nd levels are levels corresponding to the frequency 1.1 (Hz) respectively, According to FIG. 14, it specifies with the peak q2.

  Therefore, since both the first and second levels extracted as described above correspond to the respective peaks q1 and q2 by collation with the corresponding frequency analysis data, it is determined YES in step 250. Then, in step 251, it is determined that there is a living victim. This means that the existence of surviving victims to be rescued has been searched.

  According to the above, since the elastic vibration generated from the victim propagates to both the high-sensitivity acceleration sensors 10 and 20 through the ground and both block bodies 30 and 40, the victim is buried in or under the collapsed house. Even if you are away, you can quickly search for the victim even if you are away from the victim who suffered from an earthquake or other disasters by detecting the elastic vibrations of the victim using both high-sensitivity acceleration sensors 10, 20. obtain. If the determination in step 250 is NO, in step 254, a determination process is made that there is no survivor.

  After the processing in step 251 as described above, the acceleration data is filtered in step 200 in step 252. In this filtering process, the heartbeat waveform of the surviving victim is extracted from each acceleration data as each heartbeat waveform data. The heartbeat waveform is composed of each pulse waveform of a series of heartbeat pulses generated in response to each heartbeat of the surviving victim.

  Next, in step 253, the arrival time difference Δt is calculated. In this calculation process, the difference (Ta−Tb) between the arrival times Ta and Tb at which one heartbeat pulse generated in response to one heartbeat of the surviving victim reaches the two acceleration sensors 10 and 20 is calculated as the one. The arrival time difference Δt is calculated based on the time difference of each rising edge (or each peak) of each corresponding pulse waveform in each heartbeat waveform data of the heartbeat pulse. In addition, each pulse waveform corresponding to each other in each heartbeat waveform data may be used without being limited to each rise time (or each peak time) of the pulse waveform in each heartbeat waveform data.

  Thereafter, in step 260, it is determined whether or not the arrival time difference Δt = 0. Here, if Δt = 0 does not hold, the determination in step 260 is NO. In connection with this, the process which circulates step 252-step 260 is repeated.

  In such a state, the bolts 14, 15, 24, and 26 of the apparatus body Sa are loosened, and the acceleration sensor 20 is directed to the collapsed house with reference to the bolt 14 together with the connecting lever 50 and the acceleration sensor 10. The rotation adjustment in the direction away from the collapsed house and the bolts 14, 15, 24, and 26 are firmly tightened after this adjustment are repeated. Based on this repetition, the extraction of each heartbeat waveform data in the filtering process of each acceleration data newly output from the detection device S in step 252 and the arrival time difference Δt in step 253 based on each heartbeat waveform data. The calculation is repeated.

  Here, the rotation adjustment of the both acceleration sensors 10 and 20 as described above is made on the basis of the following. As shown in FIG. 15, if the positions of the acceleration sensors 10 and 20 are a and b, and the position of the heart of the surviving victim is c, the positions a and b are the bottom points, and c is the apex. A triangle is drawn.

  Here, as shown in FIG. 15, if the position c of the heart is deviated from the perpendicular to the midpoint of the line connecting both positions a and b, the triangle becomes an inequilateral triangle (shown in FIG. 15). (See the solid line part and the two-dot chain line part). If the heart position c is on the perpendicular, the triangle is an isosceles triangle as shown in FIG.

  Since both base angles of the isosceles triangle are the same, if the predetermined distance between the positions a and b is D, the length of the perpendicular (hereinafter referred to as perpendicular d) and the direction to the collapsed house can be easily set. Thus, the position of the heart of the survivor's body, that is, the position of the survivor can be specified.

  Therefore, in the present embodiment, when the above-described triangle is not an isosceles triangle but an unequal piece triangle, the two unequal triangles are adjusted by rotating the acceleration sensors 10 and 20 as described above. We decided to determine the position of the survivors using the equilateral triangle.

  Thus, if the arrival time difference Δt = 0 in the process of repeatedly calculating the arrival time difference Δt in step 253 as described above, YES is determined in step 260. Then, in step 261, the position determination process for the surviving victim is performed. Accordingly, it is determined that the position of the surviving victim is on the perpendicular line d of the isosceles triangle.

  Thereby, the existence direction from the both acceleration sensors 10 and 20 of a living victim can be specified correctly and easily.

  In step 262, a distance calculation process to the surviving victim is performed. In this distance calculation process, the distance L (see FIG. 16) is calculated based on the length of the perpendicular line d of the isosceles triangle. That is, if the external dimensions of both acceleration sensors 10 and 20 are considerably shorter than the length of perpendicular d, the center points of both acceleration sensors 10 and 20 correspond to both positions a and b. Each base angle of the isosceles triangle can be obtained by actual measurement. Accordingly, if the base angle of the isosceles triangle is α, the distance L is (D / 2) tan α. According to this, it can be seen that the surviving victim is present at a position of about (D / 2) tan α from the apparatus main body Sa.

  Thereby, it is possible to correctly and easily specify the positions of both the acceleration sensors 10 and 20 of the surviving victim.

In carrying out the present invention, the following various modifications are possible without being limited to the above embodiment.
(1) Although both acceleration sensors 10 and 20 are fixed to both block bodies 30 and 40, instead of this, both acceleration sensors 10 and 20 are directly applied to a hard part of the ground G or a part of a rock mass. It may be fixed. In general, both acceleration sensors 10 and 20 may be fixed to both solid media that propagate elastic vibrations.
(2) If both acceleration sensors 10 and 20 are high sensitivity, they may have only an X detection axis, for example, without being limited to a triaxial high sensitivity acceleration sensor.
(3) The level extraction in step 240 and the determination in step 250 may be performed based on only one of the two frequency analysis data in step 220.

It is a block circuit diagram showing one embodiment of a search system for victims concerning the present invention. It is a top view of the detection apparatus of FIG. FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. It is a block diagram of the body movement detection apparatus which detects a body movement characteristic in the said embodiment. It is a timing chart which shows the time change of respiration voltage. It is a graph showing the relationship between respiration voltage and respiration frequency. It is a timing chart which shows the time change of heartbeat voltage. It is a graph which shows the relationship between a heart rate voltage and a heart rate frequency. It is a timing chart which shows the time change of an electrocardiogram voltage. It is a graph which shows the relationship between an electrocardiogram voltage and a heart rate frequency. It is a flowchart showing the computer program run by the computer main body of FIG. It is a perspective view which shows the example which embed | buried the apparatus main body in the ground of a collapsed house. It is a timing chart which shows the time change of an acceleration voltage. It is a graph which shows the relationship between an acceleration voltage and a frequency. It is a figure which shows the inequilateral triangle determined by each position of both acceleration sensors and a living victim. It is a figure which shows the isosceles triangle decided by each position of both acceleration sensors and a living victim.

Explanation of symbols

D ... predetermined intervals, G ... ground, PC ... notebook personal computer, S ... detection device, Sa ... device main body,
10, 20 ... acceleration sensor, 30, 40 ... block body.

Claims (5)

A metal main block body buried in the ground ,
A metal sub-block body embedded in the ground at a predetermined interval so as to face the metal main block body;
A main sensor main body mounted on the upper surface of the metal main block body, and a reference extending from the bottom wall of the main sensor main body and being rotatably fastened along the upper surface of the metal main block body A flange and a reverse flange extending in a direction opposite to the reference flange from a bottom wall of the main sensor body, and having an arc shape centering on a fastening portion of the reference flange with respect to the upper surface of the metal main block body A reverse-facing flange that is movably fastened along a main positioning groove formed on the upper surface of the metal main block body so that the body of the victim affected by a disaster such as an earthquake A main three-axis high-sensitivity acceleration sensor that detects elastic vibration propagating through the ground and the metal main block body as acceleration through any of the three detection axes in the main sensor body;
A sub sensor main body mounted on the upper surface of the metal sub block body, and a reverse wall extending from the bottom wall of the sub sensor main body so as to face the reverse flange of the main triaxial high-sensitivity acceleration sensor. One side opposed flange connected to the orientation flange via a connecting bar so as not to be relatively displaced, with the reference flange of the main three-axis high-sensitivity acceleration sensor centered on the fastening portion with respect to the upper surface of the metal main block body A one-side opposing flange that is movably fastened along a one-side sub-positioning groove formed on the upper surface of the metal sub-block body so as to form an arc, and the one side from the bottom wall of the sub-sensor body An opposite side flange that extends in a direction opposite to the opposite flange, with the reference flange centered on the upper surface of the metal main block body through the one-side sub-positioning groove. The other side opposing positioning groove formed on the upper surface of the metal subblock body so as to be arcuate, and an other side opposing flange that is movably fastened, and from the victim's body A sub 3-axis high-sensitivity acceleration sensor that detects elastic vibration propagating through the ground and the metal sub-block body as acceleration through any of the three detection axes of the sub-sensor body;
A frequency analysis means for forming a frequency analysis data representing the relationship between one of the peripheral and wavenumber analysis acceleration level and frequency of the acceleration data corresponding to the main and the acceleration detected by the sub-three Jikudaka sensitivity acceleration sensor,
Searching for whether or not the frequency analysis data includes a frequency analysis component corresponding to the elastic vibration of the victim, thereby searching for the presence or absence of a surviving victim, for the victim Search system. Before Symbol search means,
When searching for the existence of a surviving survivor by searching that the frequency analysis data includes the frequency analysis component corresponding to the elastic vibration of the survivor, the both acceleration data are filtered to survive Filtering means for extracting the heartbeat waveform of the victim as heartbeat waveform data;
The main 3 Jikudaka sensitivity the sub 3 from victims of the heart the survival and cardiac component through the metal sub-block body reaches the acceleration sensor through a pre-Symbol metallic main block body from victims of the heart the survival the difference in arrival time period between the heart beats Ingredient reaching the Jikudaka sensitivity acceleration sensor, on the basis of the each heartbeat waveform corresponding to each other in each heartbeat waveform data, and arrival time difference calculating means for calculating a time difference of arrival,
While moving along the front SL sub triaxial sensitive acceleration sensor in auxiliary positioning groove of the one side and the other side at the upper surface of the metallic sub-block body, said reference flange with respect to the upper surface of said metallic main block body before SL main and sub in three axial height when the arrival time difference becomes zero by the move adjust via the connecting bar along the main 3 Jikudaka sensitive acceleration sensor relative to the fastening portion in the main positioning groove 2. The search system for victims according to claim 1, further comprising position determining means for determining that the surviving victim is located on a perpendicular bisector with respect to a line connecting the sensitivity acceleration sensors. To the line while the line connecting the victims heart to the main and sub-three-axis sensitive acceleration sensors for the survival on the vertical bisector is connecting the main and 3 Jikudaka sensitivity accelerometer sub When the angle formed is α, the search means calculates the distance from the midpoint of the line connecting the main and sub three-axis high-sensitivity acceleration sensors to the surviving victim by the predetermined interval × (½) The search system for victims according to claim 2, further comprising a distance calculating unit that calculates based on xtan α. A memory for storing a predetermined elastic vibration frequency component that specifies the survival of the human as elastic data, out of elastic vibration characteristics propagating from at least one of the human heart system and respiratory system to the outside of the human body. With means,
The search means includes
Extraction means for extracting the frequency analysis component in the frequency analysis data as an extracted vibration frequency component;
Determination means for determining whether the bullet data matches the extracted vibration frequency component by the extraction means,
The victim according to any one of claims 1 to 3, wherein it is determined that there is a survivor on the basis of the determination by the determination means that the cardiac data matches the extracted vibration frequency component. Search system for.   The predetermined elastic vibration frequency component of the ambulatory data includes a heartbeat frequency of 0.32 (Hz) and a corresponding heartbeat frequency component corresponding to the heartbeat frequency of 0.32 (Hz) and a respiration frequency of 1.1. 5. The search system for a victim according to claim 4, wherein the search system is at least one of (Hz) and the human respiratory frequency component specified by a predetermined respiratory peak corresponding thereto.

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