JP2004328941A - Radio type system for acquiring information inside inspected body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio type system for acquiring information inside an inspected body, capable of improving the usability by effectively supplying electric power to a device introduced into an body to be inspected (an introducing device to inside a body to be inspected) such as pills, thus suppressing power consumption on an external device side. <P>SOLUTION: When the pill is introduced into an organism of the inspected body and the pill attains information inside body to be inspected in the organism, the information inside body to be inspected from the pill is inputted into a receiver 2 through a receiving antenna. The pill determines the intensity of a signal for electric power supply, and a determination result signal is transmitted by radio transmission. The receiver 2 receives the determination result signal by the receiving antenna, and power supply condition is detected by a power supply level detecting circuit 48 and a power/directivity detection circuit 50, on the basis of the determination result signal. Consequently, an amplifying circuit 44 adjusts the intensity of the signal for electric power supply. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wireless in-vivo information acquiring system, for example.
[0002]
[Prior art]
In recent years, swallowable capsule endoscopes (hereinafter referred to as pills) have appeared in the field of endoscopes. This pill is provided with an imaging function and a wireless function. The pill is swallowed from the patient's mouth for observation (examination) and then moves through the organs such as the stomach and small intestine along with its peristaltic movement until it is naturally discharged from the human body. This is a mechanism for imaging.
[0003]
During this observation period due to movement in the organ, image data imaged in the body by the pill is sequentially transmitted to the outside by wireless communication and stored in the memory. When the patient carries the receiver having the wireless communication function and the memory function, the patient can freely act during the observation period until the pill is swallowed and then discharged. After observation, the doctor or nurse can make a diagnosis by displaying an organ image on the display based on the image data stored in the memory.
[0004]
In power supply, this type of pill is placed in the body of the subject, so a battery is installed in the pill and power is supplied to the inside by the battery. There is a power transmission system that supplies power to the inside by transmitting power.
[0005]
In the case of the latter power transmission system, a power receiving antenna is provided therein, and in order to operate a radio capsule (corresponding to a pill) placed in the living body for a long time, power is passed through the power receiving antenna into the radio capsule. A configuration for transmitting is provided (Patent Document 1).
[0006]
Today, this type of pill includes M2A (registered trademark) of Given Imaging Inc. in Israel and NORIKA (registered trademark) of RF Co., Ltd. in Japan.
[0007]
[Patent Document 1]
Japanese Patent Laying-Open No. 2001-231186 (page 3, FIG. 1)
[0008]
[Problems to be solved by the invention]
As described above, since the conventional power transmission system is configured to simply supply power from outside the living body, the power supply status to the pill cannot be grasped.
[0009]
It is an object of the present invention to efficiently supply power to an apparatus (intra-subject introduction apparatus) that is introduced into a subject such as a pill, so that the power consumption on the external apparatus side can also be suppressed, which is easy to use. The object is to provide a wireless in-vivo information acquisition system.
[0010]
[Means for Solving the Problems]
In order to solve the above-described problems and achieve the above object, a wireless intra-subject information acquisition system according to the invention of claim 1 includes an intra-subject introduction apparatus introduced into the subject, and the intra-subject interior. Function execution means provided in the introduction apparatus for executing predetermined functions of the in-subject introduction apparatus for acquiring in-subject information, an external apparatus arranged outside the subject, and the external apparatus And a power source means for transmitting a power supply signal having a predetermined intensity for wirelessly transmitting power to the intra-subject introduction apparatus, and the power supply signal sent from the power source means. A first power feeding signal transmitting means having a predetermined directivity configured to be able to transmit wirelessly to the intra-sample introducing device, and the power supply signal sent from the power source means to the intra-subject introducing device. Transmitted by radio Wirelessly transmitted from the first and second power supply signal transmitting means, the second power supply signal transmitting means having a predetermined directivity different from the first power supply signal transmitting means, The power supply received from each of the power supply signal receiving means provided in the in-subject introduction apparatus configured to receive the power supply signal and the first and second power supply signal transmitting means. Receiving intensity determination means provided in the in-subject introduction apparatus for determining the intensity of the signal for use and outputting a determination result signal; and modulating the determination result signal output from the reception intensity determination means to the subject And a determination result transmitting means provided in the in-subject introduction device for wireless transmission to the outside of the introduction device.
[0011]
According to a second aspect of the present invention, in the first aspect of the invention, the determination result receiving means provided in the external device configured to be capable of receiving the determination result signal transmitted from the determination result transmitting means, and the determination result A power supply status detecting unit that detects the power supply status from the first and second power supply signal transmitting units to the in-subject introduction device according to the determination result signal received by the receiving unit; It is characterized by that.
[0012]
According to a third aspect of the present invention, in the second aspect of the invention, the signal strength adjusting means for adjusting the strength of the power supply signal sent from the power source means based on the detection result of the power supply status detecting means, Furthermore, it is characterized by comprising.
[0013]
According to a fourth aspect of the present invention, in the second aspect of the present invention, based on the detection result of the power supply state detection means, the signal from at least one of the first power supply signal transmission means and the second power supply signal transmission means. And a switching control means for suppressing output of the power supply signal.
[0014]
According to a fifth aspect of the present invention, in the second aspect of the present invention, the power supply status detection means transmits the power supply signal transmitted from the first power supply signal transmission means and received by the in-subject introduction apparatus. And detecting that the signal intensity is higher than the power supply signal transmitted from the power supply signal and the second power supply signal transmission means and received by the intra-subject introduction apparatus.
[0015]
According to a sixth aspect of the present invention, in the fifth aspect of the invention, the switching control is performed so that the power supply signal is output only from the first power supply signal transmission unit based on the detection result of the power supply state detection unit. The means is controlled.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
[0017]
First, the system concept will be described. FIG. 1 is a system conceptual diagram of a capsule endoscope system which is an example of a wireless in-vivo information acquiring system according to the present invention. This capsule endoscope system wirelessly communicates various types of information between a pill (intra-subject introduction device) 1 introduced into a living body as a subject BDY and the pill 1 placed outside the living body. And a receiver 2 as an external device.
[0018]
Next, the pill 1 will be described. FIG. 2 is a block diagram showing the internal configuration of the pill according to the present embodiment. In FIG. 2, a pill 1 is an in-subject introduction apparatus that is introduced into the subject BDY. The pill 1 includes an LED 11 (function execution unit) as a light emitting element that emits illumination light that illuminates a test site of the subject BDY, an LED drive circuit 12 that sends an LED drive signal for driving the LED 11, and an LED 11 CCD 13 (function execution means) for capturing a subject image obtained by reflecting the illumination light from the region to be examined, a CCD drive circuit 14 for driving the CCD 13, and an imaging signal output from the CCD 13 are modulated. An RF transmission unit 15 (determination result transmission means) for making an RF signal, an RF antenna 16 as a transmission antenna for wirelessly transmitting the RF signal output from the RF transmission unit 15, and the like.
[0019]
The CCD 13 is normally driven at an imaging rate of about 2 fps, and the LED 11 repeats blinking at least including the imaging period of the CCD 13 or is always lit in the imaging state.
[0020]
The pill 1 further includes a power receiving antenna 17 (power feeding signal receiving means) that receives a radio signal transmitted from the receiver 2 and a separation that separates the power feeding signal from the signal received by the power receiving antenna 17. A circuit 18, a power regeneration circuit 19 that regenerates power from the power supply signal, and a level determination circuit 20 (reception strength determination means) that determines the level of the regenerated power and sends the determination result to the RF transmission unit 15. ), A booster circuit 21 that boosts the regenerated power, a capacitor 22 that stores the boosted power, and each unit in the pill 1 such as the CCD 13 and the LED 11 is controlled by the power stored in the capacitor 22. And a system control circuit 23 (function execution means). In order to acquire the in-subject information, the LED 11, the CCD 13, the RF transmission unit 15, and the system control circuit 23 perform predetermined functions of the pill 1.
[0021]
The CCD 13 sends the subject image acquired by emitting illumination light from the LED 11 as the light emitting element to the RF transmission unit 15 as an imaging signal which is an in-subject information signal. The RF transmission unit 15 modulates the in-subject information signal sent from the CCD 13 and wirelessly transmits it outside the pill 1 via the RF antenna 16 which is a transmission antenna.
[0022]
Here, an ADC (analog-to-digital converter) may be provided after the CCD 13, and a digital signal obtained by AD-converting the in-vivo information signal may be modulated and wirelessly transmitted. The CCD 13 is an example of a sensor means for acquiring in-subject information, and further an image pickup means for imaging in-subject information. Instead, it may be another image pickup element such as a CMOS sensor, or an image in a body cavity. Instead, any sensor means for acquiring other biological information such as temperature information and pH information may be used.
[0023]
The power receiving antenna 17 is composed of a single coil member, and receives a power feeding radio wave transmitted from the receiver 2 described later. After the power receiving antenna 17 receives the power feeding radio wave, the separation circuit 18 separates the power feeding signal from the power feeding radio wave, which is regenerated as power by the power regeneration circuit 19, and the boost circuit 21 supplies power to the battery 22. Is stored.
[0024]
Here, the capacity of the battery 22 continues for about 10 minutes in a state in which it cannot receive power (relative orientation of each antenna) depending on the direction of the power receiving antenna 17 with respect to each power feeding antenna on the receiver 2 side described later. Even if the power supply is interrupted, the capacity of the pill 1 is secured so as not to hinder the function. In addition, before introducing the pill 1 into the subject BDY, the capacitor 22 is kept in a fully charged state, thereby further suppressing problems when the power supply is interrupted.
[0025]
The system control circuit 23 controls the driving of each unit such as the LED 11 and the CCD 13 by using the electric power stored in the capacitor 22 and also controls the supply state of electric power for driving each unit. The level determination signal sent from the level determination circuit 20 to the RF transmission unit 15 is wirelessly transmitted to the outside of the pill 1 in the same manner as the in-subject information signal. Here, the timing of wireless transmission of the level determination signal by the RF transmission unit 15 is performed outside the wireless transmission period of the in-vivo information signal. Thereby, increase of power consumption can be suppressed and consumption of the electric power stored in the battery 22 can be suppressed. Note that if the in-subject information is wirelessly transmitted intermittently, the effect of suppressing power consumption can be further obtained.
[0026]
Here, there is a case where a control information signal for controlling various functions of the pill 1 is superimposed on the power supply signal by the receiver 2 and transmitted to the power supply signal. Therefore, a control information detection circuit 24 to which various control information signals that are superposed on the power feeding signal separated by the separation circuit 18 are input. The control information detection circuit 24 controls each unit in the pill 1 according to the input control information signal. That is, the control information detection circuit 24 detects a control information signal superimposed on the power supply signal supplied from the receiver 2, and based on the control information signal, the LED 11, the CCD 13, the RF transmission unit 15, and the system control described above. The drive of the circuit 23 is controlled.
[0027]
Next, the receiver 2 will be described. FIG. 3 is a block diagram showing the internal configuration of the receiver according to the present embodiment, FIG. 4 is an external view showing the overall configuration of the receiver according to the present embodiment, and FIG. 5 explains the power feeding antenna of the receiver according to the present embodiment. FIG. 6 and FIG. 6 are block diagrams showing a power supply unit for supplying power to each unit in the receiver according to the present embodiment.
[0028]
As shown in FIG. 3, the receiver 2 includes an antenna unit 31 for performing communication with the pill 1 and a receiver main body 32 for processing information communicated with the pill 1 via the antenna unit 31. In this Embodiment, the case where the receiver 2 is applied to the best is shown as an example.
[0029]
The antenna unit 31 includes a plurality of receiving antennas A1 to An (determination result receiving means) and a plurality of feeding antennas B1 to Bm. Here, n and m are natural numbers, respectively. Each antenna of the antenna unit 31 is disposed at a predetermined position on the outer surface of the antenna unit 31 when it is attached to a living body that is the subject BDY. In particular, when trying to acquire biological information from the stomach, small intestine, large intestine, or all of these parts from the esophagus of the living body, the antenna unit 31 is placed over the chest and abdomen of the living body or from the chest to the abdomen. Try to arrange.
[0030]
The receiver main body 32 is provided with an oscillator 41 (power source means) that generates a power feeding signal. Further, a control information input unit 42 is provided for an operator to input control information for controlling the function of the pill 1. Some information can be input from the control information input unit 42.
[0031]
In the present embodiment, the imaging rate of the CCD 13, that is, the frame number change information that is information for changing the number of imaging frames within a predetermined time, the LED lighting time information that changes the lighting time and lighting timing of the LED 11, and system control By controlling the circuit 23, an active mode in which power is supplied to each unit and acquisition of in-subject information is executed, and a standby in which acquisition of in-subject information is delayed by controlling power to each unit. Power ON / OFF information for switching between modes is input from the control information input unit 42.
[0032]
A superposition circuit 43 is provided at the subsequent stage of the oscillator 41. In the superimposing circuit 43, the control information input from the control information input unit 42 is superimposed on the power feeding signal output from the oscillator 41. Next, the power feeding signal on which the control information is superimposed is amplified by an amplifier circuit 44 (signal intensity adjusting means) provided at the subsequent stage of the superimposing circuit 43 and then output to the switching circuit 45 (switching control means). The amplification factor of the power feeding signal by the amplifier circuit 44 can be changed, and the changing process will be described later. The power feeding signal input to the switching circuit 45 is wirelessly transmitted from the power feeding antenna of the antenna unit 31.
[0033]
Here, for example, it is assumed that an instruction to change the imaging rate of the CCD 13 from the first imaging rate to the second imaging rate is input from the control information input unit 42. The frame number change information signal sent from the control information input unit 42 is superimposed on the power feeding signal by the superimposing circuit 43 and input to the amplifier circuit 34. Further, after being amplified by the amplification circuit 44 at a predetermined amplification factor, the switching circuit 35 sends the signal to the optimum power feeding antenna among the power feeding antennas B1 to Bm and wirelessly transmits from the power feeding antenna. .
[0034]
The power feeding signal thus wirelessly transmitted is received by the power receiving antenna 17 of the pill 1 as described above. A frame number change information signal as a control information signal separated from the power feeding signal by the separation circuit 18 is input to the control information detection circuit 24. Here, the frequency band of the control information signal is different from that of the power supply signal, and the frequency band of the control information signal is changed depending on the control content.
[0035]
As a result, radio signals can be wirelessly transmitted from the receiver 2 as multiplexed signals, and even the pill 1 can separate the input signal by the separation circuit 18 based on this frequency band, and the control information detection circuit 24 can control the control information. The contents of can be detected. The control information detection circuit 24 to which this control information signal is input detects that it is a frame number change information signal, and responds to the control content (change from the first imaging rate to the second imaging rate). Thus, the CCD drive circuit 14 is controlled so as to drive the CCD 13 at the second imaging rate.
[0036]
When the LED 11 is configured to blink in accordance with the imaging period of the CCD 13, the imaging of the CCD 13 that is changed according to the above-described control content (change from the first imaging rate to the second imaging rate). In accordance with the rate, the control information detection circuit 24 changes the lighting period from the first lighting period, which is the current lighting period, to the second lighting period suitable for the second imaging rate. A control signal may also be sent to the drive circuit 12.
[0037]
In addition, the control information detected by the control information detection circuit 24 includes an active mode in which power is supplied to each unit and acquisition of in-subject information is executed, and in-subject information is suppressed by suppressing power to each unit. In the case of the power ON / OFF information to be switched between the standby mode and the acquisition of the control signal, the control signal is sent to the system control circuit 23 to control it, and the mode is switched.
[0038]
In the superimposing circuit 43 described above, as long as no new information is input from the control information input unit 42, the same control information is continuously superimposed on the power supply signal for at least a predetermined time, so that the pill 1 only temporarily. Even if there is a period during which the power cannot be received well, the control information can be received by the pill 1. As described above, since the function of the pill 1 after being introduced into the subject BDY can be wirelessly controlled from the outside, a large amount of unnecessary in-subject information can be acquired or inadvertently obtained. Power is not consumed.
[0039]
By the way, it is preferable that the above-described antenna unit 31 is provided in advance in clothing such as a detachable vest 4 as shown in FIG. And if it is the antenna part 31 provided in such a vest 4, each antenna will be easily arrange | positioned in the most suitable position with respect to the subject BDY only by making the subject BDY wear this vest 4 Will be able to.
[0040]
In the case of FIG. 4, the antenna portion 31 is arranged on the front surface of the vest 4. However, the antenna portion 31 may be arranged similarly on the back surface, and each antenna can be arranged by using, for example, Velcro. May be detachable from the antenna unit 31, and the arrangement of the antennas may be appropriately changed according to the purpose of the inspection (particularly the site to be observed). The vest 4 is arranged on the surface side of the vest 4 so that electromagnetic waves from the outside are not received by the antenna of the antenna unit 31, that is, only signals from within the subject BDY are received by the antenna. A shield material (not shown) is provided.
[0041]
Each of the receiving antennas A1 to An is connected to the RF receiving unit 46 of the receiver 32. Further, each of the power feeding antennas B <b> 1 to Bm is connected to the switching circuit 45. The receiving antennas A1, A2,..., An are superimposed on the feeding antennas B1, B2,..., Bm, respectively, and are arranged at the same position with respect to the subject BDY. Therefore, in this embodiment, a relationship of n = m is obtained.
[0042]
Further, as shown in FIG. 5, the power feeding antenna B1 is a power feeding antenna that is two coil members with different directivities arranged so that the direction of a magnetic field generated by energization forms an angle of 90 °. The antenna b11 (first power feeding signal transmission means) and b12 (second power feeding signal transmission means) are provided, and the power feeding is not sufficiently performed depending on the direction of the power receiving antenna 17 on the pill 1 side. Is supposed to be resolved. The power feeding antenna B2 also includes power feeding antennas b21 and b22 which are two coil members, and the same applies to the power feeding antenna B2 and the subsequent parts. The power feeding antenna Bm includes power feeding antennas bm1 and bm2.
[0043]
Then, by operating the switching circuit 45, power feeding antennas that receive the power feeding signal and emit power feeding radio waves are fed at predetermined time intervals into power feeding antennas b11 and b12, power feeding antennas b21, b22,. -The power feeding antennas bm1 and bm2 are sequentially switched.
[0044]
Here, each feeding antenna is configured to have directivity in two directions as two coil members. However, the direction of the magnetic field of another coil member is set to the direction of the magnetic field of the other two coil members. You may make it give the directivity of 3 directions by providing so that it may orthogonally cross.
[0045]
The receiving antennas B1 to Bm receive the in-vivo information signal and the level determination signal wirelessly transmitted from the pill 1, respectively, and all the received signals are input to the RF receiving unit 46, respectively. . The RF receiving unit 46 is configured to demodulate the inputted in-vivo information signal and level determination signal. An image processing unit 47 and a power supply level detection circuit 48 (power supply status detection means) are connected to the subsequent stage of the RF reception unit 46. The in-vivo information signal demodulated by the RF receiving unit 46 is input to the former image processing unit 47, and a signal for detecting the power supply level is input from the RF receiving unit 46 to the latter power supply level detection circuit 48. .
[0046]
Here, in the image processing unit 47 to which the in-subject information signal is input, a predetermined process for imaging the in-subject information signal and transmitting the image signal is performed. A storage unit 49 such as a built-in hard disk drive or a portable compact flash (registered trademark) memory is connected to the subsequent stage of the image processing unit 47 to store the above-described image signal.
[0047]
On the other hand, the power feeding level detection circuit 48 sequentially switches the power feeding antennas as described above, and transmits from each power feeding antenna based on the level determination signals sequentially generated and transmitted on the pill 1 side. The power supply status of the pill 1 to the battery 22 by the supplied power supply radio wave is to be detected. The power supply level detection circuit 48 detects each power supply level to be fed by being wirelessly transmitted from each power supply antenna and received by the power receiving antenna 17 of the pill 1.
[0048]
Then, a power / directivity detection circuit 50 (power supply status detection means) provided in the subsequent stage of the power supply level detection circuit 48 amplifies the electric wave for power supply by the amplifier circuit 44 based on each detection result of the power supply level detection circuit 48. The rate is determined, and a control signal is sent to each of the switching circuits 45 so that the feeding antenna that can feed power most efficiently is selected. The amplifying circuit 44 performs an amplifying operation so as to amplify the power supply radio wave to an appropriate predetermined level set in advance according to the control signal from the power / directivity detecting circuit 50. In addition, the switching circuit 45 performs a switching operation on the feeding antenna that can feed power most efficiently in accordance with a control signal from the power / directivity detection circuit 50. In this case, for example, if the signal strength of the power supply antenna b11 is higher than that of the power supply antenna b12 based on the detection result of the power supply level detection circuit 48, the switching circuit 45 outputs the power supply signal only from the power supply antenna b11. Can be controlled.
[0049]
For example, it is assumed that the determination of power by the level determination circuit 20 of the pill 1 is set to be determined in five stages according to the magnitude of the power intensity. The five stages are divided into 5: maximum, 4: large, 3: appropriate, 2: small, 1: minute. In order to determine these five levels, different values are set in advance for the respective levels. Therefore, the intensity is determined by comparing each value with the power intensity. Here, only when the signal is transmitted from the power feeding antenna b11, the determination result by the level determination circuit 20 is “5”, and when the signal is transmitted from another power feeding antenna, the determination result is “4” or less. 2, the power / directivity detection circuit 50 causes the amplification circuit 44 to set an amplification factor such that the determination result of the level determination circuit 20 is “3”. A control signal is sent to the amplifier circuit 44, and a control signal for selecting the power feeding antenna b11 is sent to the switching circuit 45.
[0050]
In addition, even if the power is transmitted from any power supply antenna, if the determination result is “2” or less, the switching circuit 45 is controlled to sequentially switch the power supply antennas, and “3” is determined. The amplifier circuit 44 is controlled so as to increase the amplification factor until a power feeding antenna that produces a result is detected.
[0051]
In the above description, the determination result level of the level determination circuit 20 is set to five levels for convenience. However, the level determination circuit 20 is not necessarily limited to five levels or less.
[0052]
The receiver 2 is provided with a power supply unit 51 that supplies power to each unit. The power supply unit 51 is configured as shown in FIG. The power supply unit 51 is provided with a switching circuit 63 that selects a power supply that receives power supply from a plurality of power supplies. A main battery 61, a spare battery 62, and an AC power supply 64 are detachably connected to the switching circuit 63 as a plurality of power supplies.
[0053]
Further, a remaining amount detection circuit 65 for detecting the remaining amount of the battery selected as the power source from the electric power input through the switching circuit 63, and an LED for notifying the detection result by the remaining amount detection circuit 65, A notification unit 66 such as a speaker is provided at the subsequent stage of the switching circuit 63.
[0054]
The remaining amount detection circuit 65 detects the remaining amount of the battery connected to the switching circuit 63 in response to detecting that the remaining amount of the battery connected to the switching circuit 63 approaches a predetermined value such as 0 (zero). A signal is output from the remaining amount detection circuit 65 to the notification unit 66 such as LED blinking and voice output, and the operation of the notification unit 66 informs the operator of the remaining battery level. The switching circuit 63 selects the AC power source 64, the battery 61, and the battery 62 in order of priority when a plurality of power sources are connected.
[0055]
When the remaining battery level is detected by the remaining battery level detection circuit 65 as a result of detecting that the remaining battery level has approached a predetermined value such as 0 (zero), this information is fed back to the switching circuit 63 to A switching operation may be performed so as to switch to a battery or the like having a higher priority.
[0056]
When an AC power supply 64 is connected, each battery may be charged simultaneously with power feeding to each unit. When the AC power supply 64 is connected, power may be preferentially supplied from the AC power supply 64 by the switching circuit 63.
[0057]
As described above, according to the present embodiment, it is possible to efficiently supply power to an apparatus (intra-subject introduction apparatus) that is introduced into a subject like a pill, thereby suppressing power consumption on the external apparatus side. be able to. As a result, usability can be improved.
[0058]
Note that the capsule endoscope system has been described above as an example, but the present invention is not necessarily limited thereto, and can be applied without departing from the gist of the present invention.
[0059]
【The invention's effect】
As described above, according to the present invention, it is possible to suppress power consumption on the external device side by efficiently supplying power to a device (intra-subject introduction device) that is introduced into a subject like a pill. It is possible to provide an easy-to-use wireless in-subject information acquisition system.
[Brief description of the drawings]
FIG. 1 is a system conceptual diagram of a capsule endoscope system that is an example of a wireless in-vivo information acquiring system according to the present invention.
FIG. 2 is a block diagram showing an internal configuration of a pill according to the present embodiment.
FIG. 3 is a block diagram showing an internal configuration of a receiver according to the present embodiment.
FIG. 4 is an external view showing an overall configuration of a receiver according to the present embodiment.
FIG. 5 is a diagram illustrating a power feeding antenna of a receiver according to the present embodiment.
FIG. 6 is a block diagram of a power feeding unit for supplying power to each unit in the receiver according to the present embodiment.
[Explanation of symbols]
1 pill
2 receivers
4 Best
11 LED
12 LED drive circuit
13 CCD
14 CCD drive circuit
15 RF transmitter unit
16 RF antenna
17 Power receiving antenna
18 Separation circuit
19 Power regeneration circuit
20 level judgment circuit
21 Booster circuit
22 battery
23 System control circuit
24 Control information detection circuit
31 Antenna section
32 Receiver body
41 Oscillator
42 Control information input unit
43 Superposition circuit
44 Amplifier circuit
45 Switching circuit
46 RF receiver unit
47 Image processing unit
48 Power supply level detection circuit
49 Storage unit
50 Power and directivity detection circuit
61,62 battery
63 Switching circuit
64 AC power supply
65 Remaining amount detection circuit
66 Announcement Unit
A1, A2, An receiving antenna
B1, B2, Bm Feeding antenna
b11, b12, b21, b22, bm1, bm2 Feeding antenna

Claims (6)

An intra-subject introduction device introduced into the subject;
A function execution unit that is provided in the in-subject introduction apparatus and executes a predetermined function of the in-subject introduction apparatus for acquiring in-subject information;
An external device disposed outside the subject;
A power source means provided in the external device for transmitting a power supply signal having a predetermined intensity for wirelessly transmitting power to the intra-subject introduction device;
First power supply signal transmission means having a predetermined directivity configured to be able to wirelessly transmit the power supply signal transmitted from the power source means to the in-subject introduction apparatus;
Second power having a predetermined directivity different from that of the first power supply signal transmitting means configured to be able to wirelessly transmit the power supply signal transmitted from the power source means to the intra-subject introduction apparatus. A power transmission signal transmission means;
Power supply signal receiving means provided in the intra-subject introduction apparatus configured to be able to receive the power supply signal transmitted wirelessly from the first and second power supply signal transmitting means;
Reception intensity determination means provided in the intra-subject introduction apparatus for determining the intensity of the power supply signal received from each of the first and second power supply signal transmission means and outputting a determination result signal;
A determination result transmitting means provided in the in-subject introduction apparatus that modulates the determination result signal output from the reception intensity determination means and transmits the modulation result signal to the outside of the in-subject introduction apparatus;
A wireless in-vivo information acquiring system characterized by comprising: A determination result receiving means provided in the external device configured to be capable of receiving the determination result signal transmitted from the determination result transmitting means;
According to the determination result signal received by the determination result receiving means, a power supply status detecting means for detecting the power supply status from the first and second power supply signal transmitting means to the in-subject introduction device, respectively;
The wireless in-vivo information acquiring system according to claim 1, further comprising: Signal strength adjusting means for adjusting the strength of the power supply signal sent from the power source means based on the detection result of the power supply status detecting means;
The wireless in-vivo information acquiring system according to claim 2, further comprising: A switching control unit that suppresses output of a power supply signal from at least one of the first power supply signal transmission unit and the second power supply signal transmission unit, based on a detection result of the power supply state detection unit;
The wireless in-vivo information acquiring system according to claim 2, further comprising: The power supply status detection means transmits the power supply signal and the second power supply signal transmitted from the first power supply signal transmission means and received by the intra-subject introduction apparatus. 3. The wireless in-vivo information acquiring system according to claim 2, wherein a signal intensity is detected to be higher than a power supply signal transmitted from the means and received by the in-subject introduction apparatus. 6. The switching control unit is controlled to output the power supply signal only from the first power supply signal transmission unit based on a detection result of the power supply state detection unit. Wireless in-subject information acquisition system.

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