JP4763410B2 - Receiving apparatus and in-subject introduction system - Google Patents

Description

  The present invention is a receiving device that performs wireless communication with an in-subject introduction device such as a capsule endoscope that is used outside the subject and is introduced into the subject, and The present invention relates to an intra-subject introduction system including an intra-subject introduction device and a receiving device.

  In recent years, swallowable capsule endoscopes have appeared in the field of endoscopes. This capsule endoscope is provided with an imaging function and a wireless communication function. Capsule endoscopes are peristaltic in the body cavity, for example, the stomach, small intestine, etc., after being swallowed from the patient's mouth for observation (examination) and before being spontaneously discharged from the human body. It has the function to move according to and to image sequentially.

  While moving in the body cavity, image data captured inside the body by the capsule endoscope is sequentially transmitted to the outside by wireless communication and received via a receiving antenna provided outside. Then, based on the received wireless signal, the data is reproduced by a receiving device provided outside the subject, whereby it is possible to acquire an in-vivo image of the patient. When the patient carries the receiving device having the wireless communication function and the memory function, the patient can freely act even during the period from swallowing the capsule endoscope until it is discharged. Thereafter, 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 (see, for example, Patent Document 1).

  By the way, the frequency of the radio signal communicated between the capsule endoscope and the receiving device is limited by the frequency used in other electronic devices used around the subject, for example. That is, when wireless communication using a frequency band used in another electronic device or the like is performed between the capsule endoscope and the receiving device, there is a risk of causing a malfunction of the other electronic device or the like. In addition, a radio signal used for communication of other electronic devices or the like is received by the receiving device, and a failure such as an information transmission error occurs in the radio communication with the capsule endoscope.

  Therefore, in the conventional capsule endoscope system, as an example, it is conceivable to perform wireless communication using a frequency belonging to an empty channel frequency band that is not used by other wireless devices. As another example, in a conventional capsule endoscope system, wireless communication is performed using a frequency band that has been standardized in advance, and use of other electronic devices in the frequency band may be prohibited. It is done.

JP 2001-231186 A Special table 2003-526268 gazette JP 2001-353124 A

  However, the conventional capsule endoscope system has a problem that it is necessary to prepare capsule endoscopes having different transmission frequencies according to the use area such as the hospital location and the subject location.

  In other words, the frequency band used for electronic devices is often region-dependent, as is apparent from the transmission frequency of television broadcasting, for example. Therefore, the specific range of the vacant channel frequency band varies depending on the region. . In addition, when the frequency band used for capsule endoscopes is defined as a standard, for example, the subject of standardization differs in different countries, so it is guaranteed that the frequency band used will be the same throughout the world. However, in reality, it is expected that the transmission frequency band assigned to the capsule endoscope varies from country to country. From the above, when using a conventional capsule endoscope, the wireless communication means provided in the capsule endoscope is manufactured with a structure in which the transmission frequency used for transmission differs depending on the region of use. This is cumbersome and increases the manufacturing cost.

  The present invention has been made in view of the above, and it is not necessary to prepare an in-subject introduction device such as a capsule endoscope having a plurality of types of structures with different transmission frequencies for each region to be used. It is an object of the present invention to provide a receiving device capable of communicating with an internal introduction device and an in-subject introduction system.

In order to solve the above-described problems and achieve the object, a receiving apparatus according to the present invention is arranged outside a subject, and a transmission frequency of a radio signal used for communication is variable and introduced into the subject. Vacant channel search that performs wireless communication with an in-subject introduction device that is used in a performed state, and searches for a vacant channel by sweeping the reception frequency of a radio signal in a region where the receiving device is used Means, an empty channel storage unit that stores in advance an empty channel assigned to the use area of the receiving device, an empty channel searched by the empty channel search unit, and an empty channel stored in the empty channel storage unit Transmission frequency determining means for determining a transmission frequency to be used for wireless communication based on the match.

The receiving apparatus according to the present invention is characterized in that, in the above-mentioned invention, the receiving apparatus further comprises a radio signal transmitting means for transmitting a radio signal including information on the determined transmission frequency to the in-subject introducing apparatus.

An in-subject introduction system according to the present invention is a radio between an in-subject introduction apparatus to be used in a state of being introduced into a subject, and the in-subject introduction apparatus disposed outside the subject. An in-subject introduction system comprising a receiving device that performs communication, wherein the receiving device sweeps a reception frequency of a radio signal in a use region of the receiving device and searches for an empty channel; An empty channel storage unit that pre-stores an empty channel assigned to the use area of the receiving device, and an empty channel searched by the empty channel search means and an empty channel stored in the empty channel storage unit match. A transmission frequency determining means for determining a transmission frequency to be used for wireless communication, and a radio signal including information on the determined transmission frequency Wireless signal transmission means for transmitting to the in-subject introduction apparatus, wherein the in-subject introduction apparatus transmits a radio signal including information on the determined transmission frequency transmitted from the radio signal transmission means. Based on the frequency setting means for freely changing the transmission frequency of the radio signal used for communication, the transmission frequency of the radio signal used for communication is variable, and the radio signal of the transmission frequency set by the frequency setting means And a wireless communication means for performing wireless communication with the receiving device.

  According to the receiving apparatus and the in-subject introduction system according to the present invention, by sweeping the reception frequency of the radio signal in the usage region, a search is made for a different empty channel depending on the usage region, and the searched empty channel, Since the transmission frequency for the in-subject introduction device is determined based on the coincidence with the empty channel assigned to the use area of the receiving device and stored in advance in the empty channel storage unit, the transmission for the in-subject introduction device is performed. A free channel suitable for the use region stored in advance in the free channel storage unit can be selected from the free channels searched by sweeping the frequency in the actual use region, and the in-subject introduction apparatus is determined. By using a transmission frequency corresponding to this empty channel, it is possible to avoid interference with other electronic devices and other It is possible to use the transmission frequency in the frequency band that is not interfered by the slave device, etc., and it is not necessary to manufacture multiple types of in-subject introduction devices with different transmission frequencies for each destination in consideration of the area to be used, and the same structure The in-subject introduction apparatus can be used as appropriate in a plurality of regions.

  Embodiments of a receiving apparatus and an in-subject introduction system according to the present invention will be described below in detail with reference to the drawings. The present invention is not limited to the following embodiments, and various modified embodiments are possible without departing from the gist of the present invention.

(Embodiment)
FIG. 1 is a schematic diagram showing the overall configuration of the intra-subject introduction system according to the present embodiment. As shown in FIG. 1, the in-subject introduction system is introduced into the body of the receiving device 2 having a wireless reception function and the subject 1, captures an in-subject image, and transmits data to the receiving device 2. And a capsule endoscope 3 to be performed. In addition, the in-subject introduction system includes a display device 4 that displays an in-subject image based on data received by the receiving device 2, and a portable type for transferring data between the receiving device 2 and the display device 4. A recording medium 5. The receiving device 2 includes receiving antennas 6a to 6h and an external device 7 that performs predetermined processing on radio signals received via the receiving antennas 6a to 6h.

  The display device 4 is for displaying an image or the like in the subject 1 acquired by the capsule endoscope 3 and displays an image based on data supplied via the portable recording medium 5. It has a configuration such as a workstation. Specifically, the display device 4 may be configured to directly display an image by a CRT display, a liquid crystal display, or the like, or may be configured to output an image to another medium such as a printer.

  The portable recording medium 5 is detachably attached to the receiving device 2 and the display device 4 and has a structure capable of outputting and recording information when attached to both. Specifically, the portable recording medium 5 is attached to the receiving device 2 while the capsule endoscope 3 is moving in the body cavity of the subject 1, and stores information regarding the position of the capsule endoscope 3. Record. Specifically, it is attached to a storage unit (not shown) provided in the receiving device 2 and information is acquired via the storage unit. The portable recording medium 5 has a configuration in which after the capsule endoscope 3 is ejected from the subject 1, the portable recording medium 5 is taken out from the receiving device 2 and attached to the display device 4, and the recorded data is read out by the display device 4. Have. When data is transferred between the receiving device 2 and the display device 4 by a portable recording medium 5 such as a compact flash (registered trademark) memory, and the receiving device 2 and the display device 4 are connected by wire. Unlike the capsule endoscope 3, the subject 1 can freely move even when the capsule endoscope 3 is moving inside the subject 1.

  The receiving device 2 is for performing wireless communication with the capsule endoscope 3. FIG. 2 is a block diagram illustrating a configuration of the receiving device 2. As illustrated in FIG. 2, the reception device 2 includes reception antennas 6 a to 6 h and an external device 7.

  The receiving antennas 6a to 6h are used in a state of being electrically connected to the external device 7, and are disposed on the body surface of the subject 1 when in use, and the capsule endoscope 3 is connected to the subject 1. This is for receiving a radio signal transmitted from the capsule endoscope 3 while being introduced into the camera. In the first embodiment, eight receiving antennas 6a to 6h are provided as an example. However, the number of receiving antennas does not need to be particularly limited, and any number of receiving antennas may be used as long as it is plural. A number of receiving antennas may be used.

  The external device 7 is connected to the receiving antennas 6a to 6h, and selects an antenna suitable for reception from among a plurality of receiving antennas 6a to 6h, and the reception selected by the antenna selecting unit 10 A reception circuit 11 that performs demodulation processing or the like on a radio signal received via the antenna, a signal processing circuit 12 that performs predetermined processing on the signal output from the reception circuit 11, and a signal processing circuit 12. A storage unit 13 for storing the data and a control unit 14 for controlling these components. The external device 7 includes a power supply unit 15 that supplies driving power to the above-described components.

  The antenna selection unit 10 is connected to each of the plurality of reception antennas 6a to 6h, selects any one of the reception antennas 6a to 6h, and receives a radio signal received via the selected reception antenna as a reception circuit 11. It is for output to. Specifically, for example, the antenna selection unit 10 compares the strengths of radio signals received via the reception antennas 6a to 6h, and selects the reception antenna that has received the highest strength radio signal. Have

  The receiving circuit 11 is for performing demodulation processing or the like on the radio signal output from the antenna selection unit 10. The storage unit 13 is predetermined information generated based on radio signals transmitted from the capsule endoscope 3 and received via the receiving antennas 6a to 6h, in the example of the first embodiment, the subject 1 This is for storing an internal image. Specifically, the storage unit 13 has a function of outputting data to the portable recording medium 5.

Furthermore, the receiving apparatus 2 according to the present embodiment searches for an empty channel by sweeping the reception frequency in the area of use, determines the transmission frequency for the capsule endoscope 3 based on the searched empty channel, and determines the internal frequency of the capsule type. It has a function to transmit to the endoscope 3. Therefore, in addition to the above configuration, the receiving device 2 sweeps the reception frequency of the radio signal in the area where the receiving device 2 is used and searches for an empty channel, and the reception through the antenna selection unit 10. a selector 22 for selecting on the basis of whether a signal in a vacant channel search unit 21 to be output to the RF receiving circuit 11 to the mode switching signal, Tei use of Oite wireless devices are assigned to use the region of the receiving apparatus 2 The capsule endoscope 3 is based on the coincidence between the empty channel storage unit 23 that stores previously unused empty channels and the empty channels searched by the empty channel search unit 21 and the empty channels stored in the empty channel storage unit 23. A transmission frequency determination unit 24 that determines a transmission frequency used for wireless communication, and a signal that defines the transmission frequency. The frequency information signal generator 26 that generates a frequency information signal included in the radio signal transmitted to the capsule endoscope 3 based on the determined transmission frequency, and the generated frequency information signal A superimposing circuit 27 that synthesizes the signal generated by the oscillator 25, and an amplifying circuit 29 that amplifies the intensity of the signal synthesized by the superimposing circuit 27 and outputs the amplified signal to the transmitting antenna 28. In the present embodiment, the reception antennas 6a to 6h, the antenna selection unit 10, and the reception circuit 11 are collectively referred to as a radio signal reception unit 30a, and the oscillator 25, the superposition circuit 27, the amplification circuit 29, and the transmission antenna 28 are collectively referred to as a radio signal reception unit 30a. Are collectively referred to as a wireless signal transmitter 30b. Furthermore, the wireless receiving unit 30a and the wireless transmitting unit 30b are collectively referred to as a wireless communication unit 30.

For example, the empty channel searching unit 21 sequentially sweeps the channel 1ch to the channel 12ch for VHF within a certain time, and if there is a channel that cannot reproduce the video signal, the empty channel searching unit 21 sets the channel as an empty channel. This is for finding an empty channel in the area of use. Similarly, the UHF channel may be sequentially swept. The vacant channel storage unit 23 stores , for each receiving device 2, an optimal vacant channel that is not assigned to use a wireless device in advance for the area of use . The transmission frequency determination unit 24 does not determine the transmission frequency used for the wireless communication by the capsule endoscope 3 based only on the empty channel searched by the empty channel search unit 21, but the search is performed by the empty channel search unit 21. If there is an empty channel that matches the empty channel stored in the empty channel storage unit 23, it is determined that the capsule endoscope 3 is a more optimal empty channel in the use area, and the capsule endoscope 3 performs wireless communication. This is for determining the transmission frequency to be used.

  Next, the capsule endoscope 3 will be described. The capsule endoscope 3 functions as an example of an intra-subject introduction apparatus. The capsule endoscope 3 is introduced into the subject 1 and performs a predetermined function on the subject 1, and the outside of the subject 1 Wireless communication with the receiving device 2 arranged in the network. Specifically, the capsule endoscope 3 has an imaging function as a predetermined function, and also has a function of wirelessly transmitting captured data to the receiving device 2.

  FIG. 3 is a block diagram showing a configuration of the capsule endoscope. As shown in FIG. 3, the capsule endoscope 3 includes an LED 31 that functions as an illuminating unit for irradiating an imaging region when imaging the inside of the subject 1, and an LED driving circuit that controls the driving state of the LED 31. 32, a CCD 33 that functions as an imaging unit that captures a reflected light image from the region irradiated by the LED 31, and a CCD drive circuit 34 that controls the drive state of the CCD 33. The LED 31, the LED drive circuit 32, the CCD 33, and the CCD drive circuit 34 operate as a function execution unit that performs a predetermined function as a whole. The capsule endoscope 3 includes a transmission circuit 35 that modulates image data captured by the CCD 33 to generate a wireless signal, a transmission antenna 36 that wirelessly transmits an RF signal output from the transmission circuit 35, and A transmission frequency selection unit 37 that sets the transmission frequency of the radio signal output from the transmission circuit 35 in a freely changeable manner, and a control unit that controls driving of the LED drive circuit 32, the CCD drive circuit 34, the transmission circuit 35, and the transmission frequency selection unit 37. 38 and a power supply unit 39 that supplies driving power to each component. In the present embodiment, the LED 31, the LED drive circuit 32, the CCD 33, and the CCD drive circuit 34 are collectively referred to as a function execution unit 40. The transmission circuit 35 and the transmission antenna 36 are collectively referred to as a wireless signal transmission unit 41 a in the wireless communication unit 41.

  The transmission circuit 35 is for generating a radio signal having a predetermined transmission frequency based on the image data captured by the CCD 33. Here, the transmission circuit 35 has a configuration in which the transmission frequency of a radio signal used for communication is variable and is changed and set according to a selection signal from the transmission frequency selection unit 37. FIG. 4 is a block diagram illustrating a configuration example of the transmission circuit 35. As shown in FIG. 4, the transmission circuit 35 has a plurality of voltage control oscillators 50a, 50b, 50c indicated by VCO1 to VCO3 for varying the transmission frequency, and the input side of the voltage control oscillators 50a to 50c. Select the selector 51 that switches the image signal from the CCD 33 to be input according to the selection signal, and selects the transmission frequency that is positioned on the output side of the voltage controlled oscillators 50a to 50c. A selector 52 that switches according to the signal and an amplifier 53 that amplifies the image signal of the transmission frequency selected by the selector 52 are provided. In the present embodiment, for the sake of simplicity, for example, three voltage controlled oscillators 50a to 50c are provided. However, the number of voltage controlled oscillators is not particularly limited, and a plurality of voltage controlled oscillators need not be interpreted. If so, any number of voltage controlled oscillators may be used.

  The transmission frequency selection unit 37 functioning as a frequency setting means is for selecting and setting the transmission frequency of the radio signal output from the transmission circuit 35 to any one defined by the voltage controlled oscillators 50a to 50c. In the form, the capsule endoscope 3 has a wireless signal transmission / reception function in order to change the transmission frequency of the wireless signal by receiving the transmission frequency determined by the transmission frequency determination unit 24 of the receiving device 2. The communication unit 41 is provided. The wireless communication unit 41 has a configuration newly including a wireless signal receiving unit 42 for setting a transmission frequency based on an external input. The wireless signal receiving unit 42 includes a receiving antenna 43 and a receiving antenna 43. A reception circuit 44 that performs demodulation processing and the like on the wireless signal received via the wireless communication device.

  The capsule endoscope 3 extracts a frequency information signal related to the transmission frequency included in the radio signal by performing predetermined processing on the signal output from the receiving circuit 44, and the control unit 38 extracts the extracted frequency information signal. And a transmission frequency selection unit 37 that outputs a selection signal for selecting a transmission frequency output by the transmission circuit 35 based on the frequency information signal input to the control unit 38. That is, the transmission frequency selection unit 37 is configured to output a selection signal to the transmission circuit 35 in order to set the transmission frequency based on an instruction from the receiving device 2 side which is an external input. The transmission circuit 35 performs a frequency variable operation so as to transmit and output a radio signal having a transmission frequency selected according to a selection signal from the transmission frequency selection unit 37.

  The transmission frequency selection unit 37 outputs a selection signal that should correspond to the transmission frequency determined by the transmission frequency determination unit 24 of the reception device 2 to the selectors 51 and 52. Accordingly, in a certain region of use, the transmission frequency selection unit 37 outputs a selection signal so as to select the voltage-controlled oscillator (VCO1) 50a for the transmission frequency determined for the selectors 51 and 52, and within the capsule type The endoscope 3 transmits an image signal from the CCD 33 from the transmitting antenna 36 as a radio signal having a transmission frequency specified by the voltage controlled oscillator (VCO1) 50a. Similarly, in another certain use region, the transmission frequency selection unit 37 outputs a selection signal so as to select the voltage-controlled oscillator (VCO2) 50b for the transmission frequency determined for the selectors 51 and 52, The capsule endoscope 3 transmits and outputs an image signal from the CCD 33 from the transmission antenna 36 as a radio signal having a transmission frequency specified by the voltage controlled oscillator (VCO2) 50b. In still another use region, the transmission frequency selection unit 37 outputs a selection signal so as to select the voltage-controlled oscillator (VCO3) 50c for the transmission frequency determined for the selectors 51 and 52, and the capsule type The endoscope 3 transmits and outputs an image signal from the CCD 33 from the transmitting antenna 36 as a radio signal having a transmission frequency specified by the voltage controlled oscillator (VCO3) 50c.

  Next, the determination and setting operation of the transmission frequency of the capsule endoscope 3 in the intra-subject introduction system according to the present embodiment will be described. FIG. 5 illustrates transmission frequency determination and transmission operations executed by the empty channel search unit 21, the transmission frequency determination unit 24, the frequency information signal generation unit 26, and the radio signal transmission unit 30b under the control of the control unit 14. It is a schematic flowchart for doing.

  This process is performed by setting the receiving device 2 to the sweep mode in the use region (for example, hospital location) prior to the actual use of the intra-subject introduction system (step S1, Yes). When the sweep mode is set, the control unit 14 switches the output side of the selector 22 to the empty channel search unit 21 side (step S2). Then, as an empty channel search operation performed by the empty channel search unit 21, a frequency scan is performed to vary the reception frequency of the receiving device 2 in a predetermined frequency step (step S3), and an empty channel is swept by sweeping the reception frequency. Is searched (step S4). If an empty channel is found by the empty channel search operation, it is checked whether there is an empty channel that matches the empty channel stored in the empty channel storage unit 23 in the empty channel (step S5). If there is a vacant channel (step S5: Yes), the frequency corresponding to the vacant channel is determined by the transmission frequency determination unit 24 as the transmission frequency used by the capsule endoscope 3 at the location (step S6). If there is no matching empty channel (step S5: No), the receiving apparatus 2 is not suitable for the place of use, and thus the process ends without determining the transmission frequency. Then, the frequency information signal generator 26 and the radio signal transmitter 30b transmit and output a frequency information signal including information on the determined transmission frequency from the transmitting antenna 28 to the capsule endoscope 3 side (step S7).

  FIG. 6 shows, for example, the correspondence between the empty channel searched by the sweep of the empty channel searching unit 21 and the empty channel assigned to the use area of the receiving device 2 stored in advance in the empty channel storage unit 23. It is a figure which shows an example. As a result of sweeping the channels 1ch to 12ch of the VHF, channels 2ch, 5ch, 7ch, 9ch, and 11ch were searched as vacant channels in the use area. Since there are 9 channels, the transmission frequency determining unit 24 determines channel 7ch or 9ch as a channel for the transmission frequency as both matching empty channels.

  On the capsule endoscope 3 side, the radio signal including the frequency information signal transmitted from the transmission antenna 58 of the reception device 50 is received by the reception antenna 73, and the signal processing unit 75 determines that the radio signal is included in the radio signal. A frequency information signal related to the transmission frequency is extracted. Then, the control unit 38 sets a selection signal corresponding to the frequency information signal in the transmission frequency selection unit 37, and the transmission frequency selection unit 37 is a radio signal having a transmission frequency determined by the transmission circuit 35 on the receiving device 50 side. The transmission frequency is selected so as to be output.

  As described above, the in-subject introduction system according to the present embodiment sweeps the reception frequency of the radio signal in the actual use area, thereby searching for an empty channel that differs depending on the use area, Since the transmission frequency for the capsule endoscope 3 is determined based on the coincidence with the empty channel allocated to the use area of the receiving device 2 and stored in advance in the empty channel storage unit 23, the capsule endoscope Rather than extracting an arbitrary one from a plurality of empty channels searched by sweeping the transmission frequency for 3 in the actual use area, it is suitable for the use area stored in advance in the empty channel storage unit 23 An empty channel can be selected. The capsule endoscope 3 uses the transmission frequency corresponding to the empty channel determined as described above, so that it does not interfere with other electronic devices or the like and does not interfere with other electronic devices or the like. It is possible to use the transmission frequency of the band, and it is not necessary to manufacture a plurality of types of capsule endoscopes having different transmission frequencies for each destination in consideration of the area to be used, and the capsule endoscope 3 having the same structure is used. Can be used as appropriate in a plurality of regions.

(Modification 1)
In the present embodiment, the capsule endoscope 3 uses a plurality of voltage-controlled oscillators 50a to 50c to change the transmission frequency. However, the transmission frequency can be changed regardless of such a method. May be. FIG. 7 is a schematic block diagram showing a first modification for changing the transmission frequency of the capsule endoscope 3, and FIG. 8 is a conversion characteristic diagram showing the variable method. The capsule endoscope 3 according to the first modification includes a transmission circuit 60 that outputs a radio signal at a transmission frequency corresponding to the level of an input voltage, and a transmission circuit 60 provided from the transmission frequency selection unit 61 that is provided in the previous stage of the transmission circuit 60. And a level conversion circuit 62 that changes the level of the input voltage to the transmission circuit 60 in accordance with a selection signal indicating the frequency range.

  In the first modification, for example, as shown in FIG. 8, four stages of discrete frequency selection signals indicated by frequency ranges 1 to 4 are prepared for the transmission frequency selection unit 61, and according to each frequency selection signal. The level conversion circuit 62 is set so as to vary the level of the input voltage to the transmission circuit 60 so as to be a four-stage discrete value indicated by level ranges 1 to 4. In the first modification, the transmission frequency selection unit 61 outputs a frequency selection signal that is set in advance for each capsule endoscope 3 according to the area of use or the like to the level conversion circuit 62.

(Modification 2)
In order to vary the transmission frequency of the radio signal output from the capsule endoscope 3, the transmitting antenna 36 is configured by a parallel resonance circuit including a coil and a variable capacitor having a variable capacitance value. You may make it variably set the electrostatic capacitance value of a capacity | capacitance capacitor based on control of a frequency setting part. By changing the capacitance value of the variable capacitor, the resonance frequency of the parallel resonant circuit formed by the coil and the variable capacitor changes, so by adjusting the capacitance value of the variable capacitor, A radio signal having a transmission frequency set by the frequency setting unit 7 can be transmitted.

It is a schematic diagram which shows the whole structure of the in-subject introduction system which concerns on this Embodiment. It is a block diagram which shows the structure of a receiver. It is a block diagram which shows the structure of a capsule type | mold endoscope. It is a block diagram which shows the structural example of a transmission circuit. It is a schematic flowchart for demonstrating transmission frequency determination and transmission operation. It is a figure which shows an example of the correspondence of the empty channel searched by the sweep, and the empty channel allocated to the use area of the said receiving apparatus memorize | stored beforehand. It is a schematic block diagram which shows the modification 1 for variable transmission frequency of a capsule endoscope. It is a conversion characteristic figure which shows the variable system of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Subject 2 Receiving device 3 Capsule endoscope 21 Empty channel search part 23 Empty channel memory | storage part 24 Transmission frequency determination part 30b Wireless signal transmission part 31 Wireless communication part 37 Transmission frequency selection part

Claims (3)

A receiving device that is arranged outside the subject and that performs wireless communication with an in-subject introduction device that is used in a state where the transmission frequency of a wireless signal used for communication is variable and introduced into the subject. Because
And free channel search unit for searching for a free channel by sweeping the receiving frequency of the non-linear signal,
And free channel storage unit for use use of Oite wireless device region has previously stores a channel that is not allocated for the receiving device,
A transmission frequency determining means for determining a transmit frequency to be used for wireless communication based on a match between the found Ruchi Yan'neru a vacant channel said is stored in the empty channel storage unit by said vacant channel search unit,
A receiving apparatus comprising:   The receiving apparatus according to claim 1, further comprising a wireless signal transmitting unit configured to transmit a wireless signal including information on the determined transmission frequency to the intra-subject introduction apparatus. A subject provided with an in-subject introduction device to be used in a state of being introduced into the subject, and a receiving device that is arranged outside the subject and performs wireless communication with the in-subject introduction device. An internal introduction system,
The receiving device is:
And free channel search unit for searching for a free channel by sweeping the receiving frequency of the non-linear signal,
And free channel storage unit for use use of Oite wireless device region has previously stores a channel that is not allocated for the receiving device,
A transmission frequency determining means for determining a transmit frequency to be used for wireless communication based on a match between the found Ruchi Yan'neru a vacant channel said is stored in the empty channel storage unit by said vacant channel search unit,
A radio signal transmitting means for transmitting a radio signal including information of the determined transmission frequency to the in-subject introduction apparatus;
With
The in-subject introduction device comprises:
Frequency setting means for variably setting a transmission frequency of a radio signal used for communication based on a radio signal including information on the determined transmission frequency transmitted from the radio signal transmission means;
A wireless communication means for performing wireless communication with the receiving device using a wireless signal having a transmission frequency set by the frequency setting means, the transmission frequency of a wireless signal used for communication being variable;
Intra-subject introduction system characterized by comprising:

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