JP2013017646A - Biological information acquisition system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a biological information acquisition system capable of surely switching on/off of a power source of a biological information acquisition device.SOLUTION: The biological information acquisition system includes the biological information acquisition device provided with a biological information acquisition part, and a magnetic field generator capable of generating an AC magnetic field. The biological information acquisition device includes: a power source part capable of supplying driving power of the biological information acquisition part; a magnetic field detection part capable of detecting the AC magnetic field in a coil group for magnetic field detection; and a changeover control part for performing control of switching a switch part connected between the power source part and the biological information acquisition part. The magnetic field generator is provided with a magnetic field generation part capable of generating the AC magnetic field in the coil group for magnetic field generation. The position of the biological information acquisition device is determined such that the AC magnetic field generated from the coil group for the magnetic field generation is interlinked with coil surfaces of respective coils included in the coil group for the magnetic field detection when switching the power source state of the biological information acquisition device.

Description

  The present invention relates to a biological information acquisition system, and more particularly to a biological information acquisition system capable of acquiring in-vivo information.

  Endoscopes in the medical field are conventionally used in applications such as observation inside a living body. As one of the types of endoscopes described above, the subject is placed in the body cavity by swallowing, and the subject is imaged while moving in the body cavity in accordance with the peristaltic motion. In recent years, a capsule endoscope that can wirelessly transmit an object image as an imaging signal to the outside has been proposed.

  And as what has the structure substantially the same as the capsule endoscope mentioned above, there exist some which are disclosed by patent document 1, for example.

  Specifically, Patent Document 1 discloses a configuration capable of switching the start and stop of the capsule endoscope by irradiating an alternating magnetic field from the outside of the capsule endoscope. .

However, according to the configuration disclosed in Patent Document 1, for example, due to the positional relationship between the capsule endoscope and the source of the alternating magnetic field, a relatively high intensity magnetic field must be applied to the capsule endoscope. In some cases, the switching operation related to the start and stop of the capsule endoscope is not performed. As a result, according to the configuration disclosed in Patent Document 1, an apparatus used as a source for generating an alternating magnetic field is increased in size or consumption in order to reliably perform the switching operation related to the start and stop of the capsule endoscope. There is a problem that power is used.
The present invention has been made in view of the above-described circumstances, and can reliably switch on / off the power supply of the biological information acquisition apparatus without irradiating the biological information acquisition apparatus with a high-intensity magnetic field. The object is to provide a biological information acquisition system.

  The biological information acquisition system of the present invention includes a biological information acquisition device configured to include a biological information acquisition unit capable of acquiring biological information inside a subject, and an alternating current for switching the power state of the biological information acquisition unit. A biological information acquisition system including a magnetic field generation device capable of generating a magnetic field, wherein the biological information acquisition device is connected in series with a power supply unit capable of supplying power for driving the biological information acquisition unit In a coil group for magnetic field detection including at least two coils, based on a magnetic field detection unit configured to detect an AC magnetic field generated from the magnetic field generator, and an AC magnetic field detection result in the magnetic field detection unit, A switching control unit that performs control for switching an on / off state of a switch unit connected between the power source unit and the biological information acquisition unit, and generates the magnetic field. The magnetic field generating coil group including one or a plurality of coils has a magnetic field generator configured to generate an alternating magnetic field, and the power supply state of the biological information acquisition apparatus can be switched. When performed, the position of the biological information acquisition device is determined so that the alternating magnetic field generated from the magnetic field generating coil group is linked to the coil surface of each coil included in the magnetic field detecting coil group. Is done.

  According to the biological information acquisition system of the present invention, the biological information acquisition apparatus can be reliably switched on and off without irradiating the biological information acquisition apparatus with a high-intensity magnetic field.

The figure which shows the structure of the principal part of the biometric information acquisition system which concerns on the Example of this invention. The figure which shows an example of the specific structure of a biometric information acquisition apparatus. The figure which shows an example of the specific structure of a magnetic field generator. The figure for demonstrating the positional relationship of the principal part when the biometric information acquisition apparatus is arrange | positioned in the magnetic field generator in the biometric information acquisition system which concerns on a 1st Example. The figure for demonstrating the positional relationship of the principal part when the biometric information acquisition apparatus is arrange | positioned in the magnetic field generator in the biometric information acquisition system which concerns on the 1st modification of a 1st Example. The figure for demonstrating the positional relationship of the principal part when the biometric information acquisition apparatus is arrange | positioned in the magnetic field generator in the biometric information acquisition system which concerns on the 2nd modification of a 1st Example. The figure for demonstrating the positional relationship of the principal part when the biometric information acquisition apparatus is arrange | positioned at the magnetic field generator in the biometric information acquisition system which concerns on a 2nd Example. The figure for demonstrating the positional relationship of the principal part when the biometric information acquisition apparatus is arrange | positioned in the magnetic field generator in the biometric information acquisition system which concerns on the 1st modification of a 2nd Example. The figure for demonstrating the positional relationship of the principal part when the biometric information acquisition apparatus is arrange | positioned in the magnetic field generator in the biometric information acquisition system which concerns on the 2nd modification of a 2nd Example.

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
1 to 6 relate to a first embodiment of the present invention.

  FIG. 1 is a diagram illustrating a configuration of a main part of a biological information acquisition system according to an embodiment of the present invention.

  As shown in FIG. 1, the biological information acquisition system 1 of this embodiment includes a biological information acquisition device 10 and a magnetic field generation device 20 that transmits an activation control signal using an alternating magnetic field to the biological information acquisition device 10. doing.

  The biological information acquisition apparatus 10 is configured as an apparatus including a capsule-shaped housing that can be placed in a body cavity of a subject, such as a capsule endoscope.

  Here, a specific configuration example of the biological information acquisition apparatus 10 will be described. FIG. 2 is a diagram illustrating an example of a specific configuration of the biological information acquisition apparatus.

  As shown in FIG. 2, the biological information acquisition apparatus 10 includes an illumination unit 11 that illuminates a subject inside the living body, an objective optical system (not shown) that forms an image of the subject illuminated by the illumination unit 11, and the objective optical system. An imaging unit 12 including an imaging device that captures an imaged subject and outputs an imaging signal; a wireless transmission unit 13 that converts the imaging signal output from the imaging unit 12 into a wireless signal and outputs the signal to the outside; And a power supply unit 14 composed of a built-in battery or the like that can supply power required for driving each unit of the biological information acquisition apparatus 10.

  That is, the biological information acquisition unit in the present embodiment includes the illumination unit 11 and the imaging unit 12.

  As shown in FIG. 2, the biological information acquisition apparatus 10 includes a magnetic field detection unit 15 configured to be able to detect an alternating magnetic field generated from the magnetic field generation device 20, and an output corresponding to the detection result of the magnetic field detection unit 15. A switching control unit 18 to which a signal is input and a switch unit 19 configured to be able to switch an on / off state according to the control of the switching control unit 18 are provided.

  The magnetic field detection unit 15 includes a secondary coil group 17 configured to include a plurality of coils connected in series. And according to the structure of such a magnetic field detection part 15, while the induced current according to the detection result of the alternating current magnetic field emitted from the magnetic field generator 20 generate | occur | produces in the secondary side coil group 17, according to the said induced current The electrical signal is input to the switching control unit 18. The specific configuration (number and arrangement of the secondary coil group 17) will be described later.

  The switching control unit 18 is configured by, for example, a divide-by-2 circuit, and when the signal level of the output signal output according to the detection result of the magnetic field detection unit 15 is detected to be equal to or higher than a threshold, A control signal for switching the on / off state of the unit 19 is output.

  The switch unit 19 is connected between the power supply unit 14 and each unit of the illumination unit 11, the imaging unit 12, and the wireless transmission unit 13, and switches on and off each time a control signal is input from the switching control unit 18. It is configured as follows. That is, when the switch unit 19 is turned on, power is supplied from the power supply unit 14 to each of the illumination unit 11, the imaging unit 12, and the wireless transmission unit 13. Further, when the switch unit 19 is turned off, the power supply from the power supply unit 14 to each of the illumination unit 11, the imaging unit 12, and the wireless transmission unit 13 is stopped.

  Next, a specific configuration example of the magnetic field generator 20 will be described. FIG. 3 is a diagram illustrating an example of a specific configuration of the magnetic field generator.

  As shown in FIG. 3, the magnetic field generation device 20 includes a magnetic field generation unit 42 that generates an activation control signal using an alternating magnetic field, a magnetic field generation control unit 49 that drives the magnetic field generation unit 42, and driving of each unit of the magnetic field generation device 20. The power supply unit 41 capable of supplying the power required for the operation and the switch 22 are provided.

  The magnetic field generator 42 includes a primary coil group 44 configured by including one or more donut-shaped planar coils. The specific configuration (number and arrangement of the primary side coil group 44) will be described later.

  The magnetic field generation control unit 49 includes an oscillator 45, a timing generation unit 46 that performs processing such as converting a signal from the oscillator 45 into a predetermined frequency, and a driver 47 that drives the magnetic field generation unit 42 with the signal of the predetermined frequency. And have.

  The switch 22 is configured as, for example, a push button switch that can switch the power supply state from the power supply unit 41 to the magnetic field generation control unit 49 in accordance with the operation of the operator.

  That is, according to the configuration of the magnetic field generation device 20 described above, the supply of power from the power supply unit 41 to the magnetic field generation control unit 49 is started in response to the switch 22 being turned on by an operator's operation. Generation of an alternating magnetic field (transmission of a start control signal) from the primary side coil group 44 (each coil included in the generating unit 42) is started.

  Further, according to the configuration of the magnetic field generation device 20 described above, the supply of power from the power supply unit 41 to the magnetic field generation control unit 49 is stopped when the switch 22 is turned off by an operator's operation, and the magnetic field generation device 20 is turned off. Generation of the alternating magnetic field (transmission of the start control signal) from the primary side coil group 44 (the coils included therein) of the generator 42 is stopped.

  Next, with reference to FIG. 4, a description will be given of specific configurations and the like of the secondary coil group 17 and the primary coil group 44 in the present embodiment. FIG. 4 is a diagram for explaining a positional relationship of main parts when the biological information acquisition device is arranged in the magnetic field generation device in the biological information acquisition system according to the first embodiment.

  As shown in FIG. 4, one end of the biological information acquisition apparatus 10 located in the long axis direction LA is formed to have the first winding direction, and the long axis direction LA and the coil surface And a coil 171 arranged so as to be orthogonal (or substantially orthogonal).

  Further, as shown in FIG. 4, a second winding direction corresponding to the reverse direction of the first winding direction described above is provided at the other end located in the major axis direction LA of the biological information acquisition device 10. A coil 172 formed so as to be provided and arranged so that the major axis direction LA and the coil surface are orthogonal (or substantially orthogonal) is incorporated.

  That is, according to the configuration of the biological information acquisition device 10 illustrated in FIG. 4, the secondary coil group 17 is arranged so that the coil surfaces are parallel (or substantially parallel) and connected in series. 171 and 172 are provided.

  On the other hand, as shown in FIG. 4, a planar coil 441 arranged so that the upper surface of the box-shaped housing and the coil surface are parallel (or substantially parallel) is built in the upper portion of the magnetic field generator 20. Yes.

  That is, according to the configuration of the magnetic field generator 20 illustrated in FIG. 4, the primary coil group 44 includes the planar coil 441.

  As shown in FIG. 4, the biological information is arranged on the upper part of the magnetic field generator 20 so that the upper surface of the box-shaped housing and the major axis direction LA of the biological information acquisition device 10 are parallel (or substantially parallel). In a state where the acquisition device 10 is arranged, a positioning member 21 is provided that is formed so that the biological information acquisition device 10 can be fixed at a predetermined position substantially above the coil surface of the planar coil 441.

  That is, the positioning member 21 of the magnetic field generation device 20 functions as a positioning unit that determines a relative positional relationship between the planar coil 441 of the magnetic field generation device 20 and the coils 171 and 172 of the biological information acquisition device 10. .

  Then, according to the configuration of this embodiment illustrated in FIG. 4, when the switch 22 is turned on in a state where the biological information acquisition device 10 is fixedly disposed by the positioning member 21, the alternating magnetic field (of the Magnetic flux) links the two coil surfaces of the coils 171 and 172, so that induced currents accompanying electromagnetic induction are generated substantially simultaneously in the coils 171 and 172, respectively. Furthermore, when the on / off state of the switch unit 19 is switched in accordance with the generation of the induced current in the coils 171 and 172, power supply from the power source unit 14 to each unit of the illumination unit 11, the imaging unit 12, and the wireless transmission unit 13 is started or Stopped.

  Therefore, according to the configuration according to the present embodiment illustrated in FIG. 4, the biological information acquisition apparatus can be reliably switched on and off without irradiating the biological information acquisition apparatus with a high-intensity magnetic field. .

  By the way, according to the configuration of the present embodiment as described above, various modifications that can obtain substantially the same effects as those described above are conceivable. Therefore, in the following, such various modifications will be described. In the following, for the sake of simplicity, detailed description of the same components and the like as those already described will be omitted as appropriate.

  A biological information acquisition system 1A according to a first modification of the present embodiment includes a biological information acquisition device 10A and a magnetic field generation device 20, as shown in FIG.

  In the biological information acquisition device 10A, in addition to the above-described coils 171 and 172, the short axis direction SA and the coil surface are orthogonal (or substantially orthogonal) at the side portion of the biological information acquisition device 10A located in the short axis direction SA. A coil 173 arranged as described above is incorporated.

  That is, according to the configuration of the biological information acquisition device 10A illustrated in FIG. 5, the secondary coil group 17 is arranged so that the coil surfaces are substantially parallel to each other and the coils 171 and 172 connected in series. And a coil 173 provided with coil surfaces so as to form an angle of approximately 90 ° with respect to the coil surfaces of the coils 171 and 172, respectively.

  Further, the positioning member 21 of the magnetic field generator 20 is a positioning unit that determines the relative positional relationship between the planar coil 441 of the magnetic field generator 20 and the coils 171, 172, and 173 of the biological information acquisition device 10 </ b> A. Function.

  And according to the structure which concerns on the 1st modification of a present Example illustrated in FIG. 5, if switch 22 is turned on in the state by which biological information acquisition apparatus 10A was fixedly arranged by the positioning member 21, the planar coil 441 will be turned on. Since the alternating magnetic field (magnetic flux) generated from the cross links the three coil surfaces of the coils 171, 172, and 173, induced currents accompanying the electromagnetic induction action are generated almost simultaneously in the coils 171, 172, and 173, respectively. Furthermore, the on / off state of the switch unit 19 is switched in accordance with the generation of the induced current in the coils 171, 172, and 173, so that power is supplied from the power source unit 14 to each unit of the illumination unit 11, the imaging unit 12, and the wireless transmission unit 13. Started or stopped.

  Therefore, according to the structure which concerns on the 1st modification of a present Example illustrated in FIG. 5, even if it does not irradiate a biometric information acquisition apparatus with a high intensity | strength magnetic field, on / off switching of the power supply of the said biometric information acquisition apparatus is carried out. It can be done reliably.

  On the other hand, the biological information acquisition system 1B according to the second modification example of the present embodiment includes a biological information acquisition device 10 and a magnetic field generation device 20B as illustrated in FIG.

  Instead of the positioning member 21 in the magnetic field generator 20, the magnetic field generator 20 </ b> B is provided with a recess 21 </ b> B that is a hole that can be inserted and fixed with the long axis direction LA of the biological information acquisition device 10 as a vertical direction. It has been.

  Also, doughnut-shaped planar coils 442 and 443 are provided around the recess 21B inside the magnetic field generator 20B.

  The planar coil 442 is formed so as to have the same first winding direction as that of the coil 171, for example, and the coil of the biological information acquisition device 10 inserted and disposed in the recess 21 </ b> B inside the magnetic field generator 20 </ b> B. 171 is arranged at a position close to 171. In addition, the coil surface of the planar coil 442 is provided on a plane orthogonal to the long axis direction LA of the biological information acquiring apparatus 10 inserted and disposed in the recess 21B.

  The planar coil 443 is formed so as to have the same second winding direction as the coil 172, for example, and the coil of the biological information acquisition device 10 inserted and disposed in the recess 21B inside the magnetic field generator 20B. It is arranged at a position close to 172. In addition, the coil surface of the planar coil 443 is provided on a plane orthogonal to the long axis direction LA of the biological information acquiring apparatus 10 inserted and disposed in the recess 21B.

  That is, according to the configuration of the magnetic field generator 20B illustrated in FIG. 6, the primary coil group 44 includes the planar coils 442 and 443 arranged so that the coil surfaces face each other along the direction of the recess 21B. Configured.

  Further, the concave portion 21B of the magnetic field generation device 20B functions as a positioning unit that determines the relative positional relationship between the planar coils 442 and 443 of the magnetic field generation device 20B and the coils 171 and 172 of the biological information acquisition device 10. To do.

  And according to the structure which concerns on the 2nd modification of a present Example illustrated in FIG. 6, when the switch 22 is turned on in the state by which the biometric information acquisition apparatus 10 was inserted and arrange | positioned at the recessed part 21B, from planar coil 442 Since the alternating magnetic field (magnetic flux) emitted links the coil surface of the coil 171 and the alternating magnetic field (magnetic flux) emitted from the planar coil 443 links the coil surface of the coil 172, it accompanies electromagnetic induction. An induced current is generated in each of the coils 171 and 172 substantially simultaneously. Furthermore, when the on / off state of the switch unit 19 is switched in accordance with the generation of the induced current in the coils 171 and 172, power supply from the power source unit 14 to each unit of the illumination unit 11, the imaging unit 12, and the wireless transmission unit 13 is started or Stopped.

  Therefore, according to the configuration according to the second modification of the present embodiment illustrated in FIG. 6, the biological information acquisition apparatus can be turned on / off without irradiating the biological information acquisition apparatus with a high-intensity magnetic field. It can be done reliably.

  In addition, according to the present Example described above, as a structure for positioning of a biological information acquisition apparatus, it is not restricted to the thing in which the positioning member or the recessed part is provided in the magnetic field generator. Specifically, instead of providing a positioning member or a recess, for example, on the outer surface of the magnetic field generator, an alternating magnetic field (magnetic flux) generated from each planar coil provided in the magnetic field generator is A mark may be added to a position where the coil surfaces of the coil are linked (or in the vicinity of the position), and a character string or the like that prompts the biometric information acquisition apparatus to be arranged in accordance with the mark may be written.

  According to the above-described configuration including the mark and the character string, the biometric information acquisition device is manually operated by the operator according to the position of the mark attached to the magnetic field generation device when the biometric information acquisition device is turned on / off. The relative positional relationship between each planar coil provided in the magnetic field generation device and each coil provided in the biological information acquisition device is determined by arranging and fixing. As a result, even when the magnetic field generator is configured to include the above-described marks and character strings, the biological information acquisition apparatus can be reliably switched on and off.

(Second embodiment)
7 to 9 relate to a second embodiment of the present invention.

  In the present embodiment, detailed description of portions having the same configuration as the first embodiment is omitted, and portions having different configurations from the first embodiment are mainly described.

  The biological information acquisition system 1C according to the present embodiment includes a biological information acquisition device 10C and a magnetic field generation device 20 as illustrated in FIG.

  The biological information acquisition apparatus 10C has the same configuration as that illustrated in FIG. 2, but the arrangement state of each coil of the secondary coil group 17 is different from the biological information acquisition apparatus 10 of the first embodiment. ing.

  Specifically, as shown in FIG. 7, the major axis direction LB and the coil surface are orthogonal (or substantially orthogonal) to one end portion of the biological information acquisition apparatus 10 </ b> C located in the major axis direction LB. The arranged coil 174 is incorporated.

  Further, as shown in FIG. 7, a coil 175 disposed on the side portion of the biological information acquisition apparatus 10 </ b> C located in the short axis direction SB so that the short axis direction SB and the coil surface are orthogonal (or substantially orthogonal). Is built-in.

  That is, according to the configuration of the biological information acquisition apparatus 10C illustrated in FIG. 7, the secondary side coil group 17 is arranged so that the coil surfaces form an angle of approximately 90 ° and is connected in series. And 175.

  The positioning member 21 of the magnetic field generation device 20 functions as a positioning unit that determines the relative positional relationship between the planar coil 441 of the magnetic field generation device 20 and the coils 174 and 175 of the biological information acquisition device 10C. .

  Then, according to the configuration of this embodiment illustrated in FIG. 7, when the switch 22 is turned on in a state where the biological information acquisition apparatus 10 </ b> C is fixedly arranged by the positioning member 21, an alternating magnetic field (of the Magnetic flux) links the two coil surfaces of the coils 174 and 175, so that induced currents accompanying electromagnetic induction are generated substantially simultaneously in the coils 174 and 175, respectively. Furthermore, when the on / off state of the switch unit 19 is switched in accordance with the generation of the induction current in the coils 174 and 175, the power supply from the power source unit 14 to each unit of the illumination unit 11, the imaging unit 12, and the wireless transmission unit 13 is started or Stopped.

  Therefore, according to the configuration according to the present embodiment illustrated in FIG. 7, the biological information acquisition apparatus can be reliably switched on and off without irradiating the biological information acquisition apparatus with a high-intensity magnetic field. .

  By the way, according to the configuration of the present embodiment as described above, various modifications that can obtain substantially the same effects as those described above are conceivable. Therefore, in the following, such various modifications will be described. In the following, for the sake of simplicity, detailed description of the same components and the like as those already described will be omitted as appropriate.

  The biological information acquisition system 1D according to the first modification example of the present embodiment includes a biological information acquisition device 10C and a magnetic field generation device 20D as illustrated in FIG.

  Instead of the positioning member 21 in the magnetic field generator 20, the magnetic field generator 20 </ b> D is provided with a recess 21 </ b> D that is a hole that can be inserted and fixed with the long axis direction LB of the biological information acquisition device 10 </ b> C as the horizontal direction. It has been.

  Also, doughnut-shaped planar coils 444 and 445 are provided around the recess 21D inside the magnetic field generator 20D.

  The planar coil 444 is disposed at a position close to one side of the biological information acquisition device 10C inserted and disposed in the recess 21D inside the upper surface side of the magnetic field generator 20D. The coil surface of the planar coil 444 is provided on a plane that is parallel to the long-axis direction LB of the biological information acquisition device 10C that is inserted and disposed in the recess 21D.

  The planar coil 445 is disposed at a position close to the other side portion of the biological information acquisition device 10C inserted and disposed in the recess 21D inside the bottom surface side of the magnetic field generation device 20D. In addition, the coil surface of the planar coil 445 is provided on a plane that is parallel to the long axis direction LB of the biological information acquiring apparatus 10C that is inserted and disposed in the recess 21D.

  That is, according to the configuration of the magnetic field generator 20D illustrated in FIG. 8, the primary coil group 44 includes the planar coils 444 and 445 arranged so that the coil surfaces face each other across the recess 21D. Has been.

  The concave portion 21D of the magnetic field generation device 20D functions as a positioning unit that determines the relative positional relationship between the planar coils 444 and 445 of the magnetic field generation device 20D and the coils 174 and 175 of the biological information acquisition device 10C. To do.

  And according to the structure which concerns on the 1st modification of a present Example illustrated in FIG. 8, when switch 22 is turned on in the state by which biological information acquisition apparatus 10C was inserted and arrange | positioned at the recessed part 21D, planar coil 444 and An alternating magnetic field (magnetic flux) emitted from the coil 445 links the coil surface of the coil 174, and an alternating magnetic field (magnetic flux) emitted from either the planar coil 444 or 445 links the coil surface of the coil 175. Therefore, induced currents accompanying the electromagnetic induction action are generated almost simultaneously in the coils 174 and 175, respectively. Furthermore, when the on / off state of the switch unit 19 is switched in accordance with the generation of the induction current in the coils 174 and 175, the power supply from the power source unit 14 to each unit of the illumination unit 11, the imaging unit 12, and the wireless transmission unit 13 is started or Stopped.

  Therefore, according to the configuration according to the first modification example of the present embodiment illustrated in FIG. 8, the biological information acquisition apparatus can be turned on / off without irradiating the biological information acquisition apparatus with a high-intensity magnetic field. It can be done reliably.

  On the other hand, the biological information acquisition system 1E according to the second modification of the present embodiment includes a biological information acquisition device 10E and a magnetic field generation device 20D, as shown in FIG.

  In the biological information acquisition device 10E, in addition to the coils 174 and 175 described above, the short axis direction SB and the coil surface are orthogonal (or substantially orthogonal) at the side portion of the biological information acquisition device 10E located in the short axis direction SB. A coil 176 arranged as described above is incorporated.

  That is, according to the configuration of the biological information acquisition apparatus 10E illustrated in FIG. 9, the secondary side coil group 17 is arranged so that the coil surfaces form an angle of approximately 90 ° and is connected in series. And 175, and a coil 176 provided with a coil surface so as to be parallel (or substantially parallel) to the coil surface of the coil 175.

  The concave portion 21D of the magnetic field generator 20D is a positioning unit that determines the relative positional relationship between the planar coils 444 and 445 of the magnetic field generator 20D and the coils 174, 175, and 176 of the biological information acquisition device 10E. Function as.

  And according to the structure which concerns on the 2nd modification of a present Example illustrated in FIG. 9, when switch 22 is turned on in the state by which biometric information acquisition apparatus 10E was inserted and arrange | positioned at the recessed part 21D, from planar coil 444 The alternating magnetic field (magnetic flux) emitted links the coil surfaces of the coils 174 and 176, and the alternating magnetic field (magnetic flux) emitted from the planar coil 445 links the coil surfaces of the coils 174 and 175. Induced currents accompanying the inductive action are generated almost simultaneously in the coils 174, 175 and 176. Furthermore, the on / off state of the switch unit 19 is switched in accordance with the generation of induced currents in the coils 174, 175, and 176, so that power is supplied from the power supply unit 14 to each unit of the illumination unit 11, the imaging unit 12, and the wireless transmission unit 13. Started or stopped.

  Therefore, according to the configuration according to the second modification of the present embodiment illustrated in FIG. 9, the biological information acquisition apparatus can be turned on / off without irradiating the biological information acquisition apparatus with a high-intensity magnetic field. It can be done reliably.

  It should be noted that the present invention is not limited to the above-described embodiments, and it is needless to say that various changes and applications can be made without departing from the spirit of the invention.

1, 1A, 1B, 1C, 1D, 1E Biological information acquisition system 10, 10A, 10C, 10E Biological information acquisition device 11 Illumination unit 12 Imaging unit 13 Wireless transmission unit 14 Power supply unit 15 Magnetic field detection unit 17 Secondary coil group 18 Switching control unit 19 Switch unit 20, 20B, 20D Magnetic field generation device 21 Positioning member 21B, 21D Recess 22 Switch 41 Power supply unit 42 Magnetic field generation unit 44 Primary coil group 45 Oscillator 46 Timing generation unit 47 Driver 49 Magnetic field generation control unit 171 172, 173, 174, 175, 176 Coils 441, 442, 443, 444, 445 Planar coils

JP 2009-89907 A

Claims (5)

A biological information acquisition device configured to include a biological information acquisition unit capable of acquiring biological information inside the subject, and a magnetic field generation device capable of generating an alternating magnetic field for switching the power state of the biological information acquisition unit; A biological information acquisition system comprising:
The biological information acquisition device
A power supply unit capable of supplying power for driving the biological information acquisition unit;
In a coil group for detecting a magnetic field including at least two coils connected in series, a magnetic field detector configured to detect an alternating magnetic field generated from the magnetic field generator;
A switching control unit that performs control for switching an on / off state of a switch unit connected between the power source unit and the biological information acquisition unit based on a detection result of an AC magnetic field in the magnetic field detection unit; ,
The magnetic field generator is
In a coil group for generating a magnetic field including one or a plurality of coils, the magnetic field generating unit is configured to generate an alternating magnetic field,
When the power supply state of the biological information acquisition apparatus is switched, the AC magnetic field generated from the coil group for generating the magnetic field becomes a position where the alternating current magnetic field is linked to the coil surface of each coil included in the coil group for detecting the magnetic field. In this way, the position of the biological information acquisition device is determined.   The magnetic field generator has an alternating magnetic field generated from the magnetic field generating coil group on the coil surface of each coil included in the magnetic field detecting coil group when the power supply state of the biological information acquisition apparatus is switched. The biological information acquisition system according to claim 1, further comprising a positioning unit capable of fixedly arranging the biological information acquisition device so as to be linked to each other.   The said two coils contained in the said coil group for a magnetic field detection are arrange | positioned so that coil surfaces may become substantially parallel inside the said biometric information acquisition apparatus. Biological information acquisition system.   The biological information acquisition system according to claim 3, wherein the two coils included in the magnetic field detection coil group are formed to have opposite winding directions.   The two coils included in the coil group for detecting a magnetic field are arranged so that coil surfaces form an angle of approximately 90 ° inside the biological information acquisition apparatus. The biological information acquisition system described in 1.

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