WO2007029570A1 - 受信装置 - Google Patents
受信装置 Download PDFInfo
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- WO2007029570A1 WO2007029570A1 PCT/JP2006/317007 JP2006317007W WO2007029570A1 WO 2007029570 A1 WO2007029570 A1 WO 2007029570A1 JP 2006317007 W JP2006317007 W JP 2006317007W WO 2007029570 A1 WO2007029570 A1 WO 2007029570A1
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- receiving
- disconnection
- antenna
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- signal
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00002—Operational features of endoscopes
- A61B1/00011—Operational features of endoscopes characterised by signal transmission
- A61B1/00016—Operational features of endoscopes characterised by signal transmission using wireless means
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00002—Operational features of endoscopes
- A61B1/00057—Operational features of endoscopes provided with means for testing or calibration
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
- A61B1/041—Capsule endoscopes for imaging
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
- H04B7/0805—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with single receiver and antenna switching
Definitions
- the present invention selects and switches a plurality of feed lines respectively connected to a plurality of reception antennas by a selection switching means, and transmits a transmission device that moves via the selection-switched feed lines and reception antennas.
- TECHNICAL FIELD The present invention relates to a receiving device that receives transmission information.
- capsule-type endoscopes which are swallowable endoscopes provided with an imaging function and a wireless communication function
- An in-subject information acquisition system has been developed that acquires image data in a subject imaged by an endoscope.
- the capsule endoscope is swallowed from the mouth of a subject such as a patient for observation (examination), and then the subject is naturally discharged from the subject.
- the inside of the specimen moves inside the organ such as the stomach or the small intestine according to the peristaltic movement, and functions to image the inside of the subject at a predetermined interval, for example, 0.5 second interval.
- image data captured by the capsule endoscope is sequentially transmitted to the outside by wireless communication, and received in a distributed manner outside the subject.
- the signal is received by the receiving device via the antenna.
- the receiving device demodulates the radio signal received via the receiving antenna into an image signal, performs predetermined image processing on the obtained image signal, and generates image data.
- the receiving device sequentially stores the image data generated in this way (that is, image information captured by the capsule endoscope) in a storage medium.
- the subject swallows the capsule endoscope until the capsule endoscope is discharged. Can act freely.
- a user such as a doctor or a nurse loads the image data stored in the storage medium of the receiving device into a workstation and displays the image in the subject on the display of the workstation.
- a specimen is diagnosed (see, for example, Patent Document 1).
- such a receiving apparatus generally has a plurality of receiving antennas that receive radio signals transmitted from a capsule endoscope and are distributed outside the body to reduce radio signal reception errors 1 Select and switch between two receiving antennas.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2003-19111
- the above-described receiving device reliably receives a radio signal from the capsule endoscope introduced into the subject and acquires as much image data in the subject as possible contained in the radio signal. It is requested. For this reason, when performing a capsule endoscopy in which a capsule endoscope is introduced into the subject and an image in the subject is acquired, the receiving device force S can acquire image data by the capsule endoscope. Check in advance whether it is in condition.
- the plurality of receiving antennas of the above-described receiving device are distributed and disposed in each part (a plurality of locations on the body surface) outside the subject, and each is connected to one receiving device main body by a coaxial cable.
- the multiple receiving antennas are repeatedly connected to the receiving device via the coaxial cable and repeatedly attached to the subject each time the capsule endoscopy is performed. For this reason, when the number of times of capsule endoscope inspection is increased, the coaxial cable is likely to be disconnected.
- the conventional receiving device detects disconnection of a plurality of receiving antennas before introducing the capsule endoscope into the subject, and whether or not each receiving antenna operates normally is determined. I confirmed.
- a dummy signal generator that emits a radio signal emitted from the capsule endoscope as a dummy signal is used, and the dummy signal generator is brought close to each receiving antenna so that the receiving state of the receiving device Had done by checking. For this reason, Capse There was a problem that it took a lot of work time to detect the disconnection of the receiving antenna in the R-type endoscopic inspection.
- the present invention has been made in view of the above, and an object of the present invention is to provide a receiving apparatus that can detect a disconnection of a feeder line in a short time and with a simple configuration.
- a receiving apparatus selects and switches a plurality of feed lines respectively connected to a plurality of receiving antennas by a selection switching unit, and the selected and switched feed lines and A receiving device that receives transmission information transmitted from a moving transmitting device via a receiving antenna! /, Branches the plurality of feed lines in the vicinity of the selection switching means, and each of the branched feed lines A detection selection switching means for selecting and switching, a grounding means for grounding the power supply line provided between the power supply line and the receiving antenna, and a power supply line selected and switched by the detection selection switching means.
- the receiving antenna is an open receiving antenna, and the feed line and the receiving antenna are connected by a transformer type balun.
- the power supply line side of the transformer type balun is grounded
- the receiving antenna is an open receiving antenna, and the feed line and the receiving antenna are connected by a short-circuit element, One end of the short-circuit element is grounded.
- the receiving antenna is a loop antenna, and one end where the feeding line and the receiving antenna are connected is grounded. It is characterized by that.
- the feeder is a coaxial cable, and an external conductor is grounded.
- the control means performs control to output a disconnection detection result.
- the plurality of feeder lines are respectively branched in the vicinity of the selection switching means for selectively switching the plurality of feeder lines respectively connected to the plurality of receiving antennas.
- a grounding means for grounding the feeder line is provided between the feeder line and the receiving antenna, and further, selection is performed by the detection selection switching means.
- a disconnection detecting means is provided for detecting the presence or absence of disconnection of the power supply line by applying a DC voltage to the switched power supply line and determining whether or not the power supply line voltage is a ground voltage. Since disconnection detection by the disconnection detecting means is performed in synchronization with the selection switching control of the switching means and the selection switching control, the disconnection of the feeder line can be detected reliably in a short time with a simple configuration. If you can!
- FIG. 1 is a block diagram showing a schematic configuration of a capsule endoscope system using a receiving apparatus according to a first embodiment of the present invention.
- FIG. 2 is a block diagram showing a schematic configuration of the receiving apparatus according to the first embodiment of the present invention.
- FIG. 3 is a diagram showing a connection relationship between the coaxial cable and the receiving antenna according to the first embodiment of the present invention.
- FIG. 4 is a block diagram showing a schematic configuration from the disconnection detection circuit to the receiving antenna when there is no disconnection in the coaxial cable.
- FIG. 5 is a block diagram showing a schematic configuration from the disconnection detection circuit to the reception antenna when the coaxial cable is disconnected.
- FIG. 6 is a diagram showing a connection relationship between the coaxial cable and the receiving antenna according to the second embodiment of the present invention.
- FIG. 7 is a diagram showing a connection relationship between the coaxial cable and the receiving antenna according to the third embodiment of the present invention.
- FIG. 8 is a schematic diagram showing an overall configuration of a wireless in-vivo information acquiring system according to a fourth embodiment of the present invention.
- FIG. 9 is a block diagram showing a configuration of the receiving apparatus shown in FIG.
- FIG. 10 is a block diagram showing a configuration of the display device shown in FIG.
- FIG. 11 is a diagram showing a change over time of the received field strength of a radio signal received by the receiving antenna without being disconnected.
- FIG. 12 is a diagram showing a change over time in received electric field strength of a radio signal received by a receiving antenna that is disconnected during reception.
- FIG. 13 is a diagram showing temporal changes in received electric field strength when a connection failure occurs due to disconnection.
- FIG. 14 is a schematic diagram schematically showing a configuration example of an in-vivo information acquiring system according to the ninth embodiment of the present invention.
- FIG. 15 is a block diagram schematically showing a configuration example of a receiving device and a monitoring device connected via a cable.
- FIG. 16 is a block diagram schematically showing a configuration example of a disconnection inspection apparatus for performing a disconnection inspection of a receiving antenna based on the disconnection inspection method according to the ninth embodiment of the present invention.
- FIG. 17 is a flowchart showing an example of a reception antenna disconnection inspection method according to the ninth embodiment of the present invention.
- FIG. 18 is a schematic diagram for explaining a method of initializing a receiving device to be inspected for disconnection.
- FIG. 19 is a schematic diagram for explaining a method for inspecting whether or not a receiving antenna is disconnected.
- FIG. 20 is a schematic diagram for explaining a modification of the disconnection inspection method according to the ninth embodiment of the present invention.
- FIG. 1 is a block diagram showing a schematic configuration of a capsule endoscope system using the receiving device 2 according to the first embodiment of the present invention.
- the capsule endoscope 3 images the inside of the subject as it moves in the subject 1, and the captured image signal is a radio signal.
- the captured image signal is a radio signal.
- the receiving device 2 is connected to a plurality of receiving antennas 8a to 8d distributed outside the body of the subject 1, coaxial cables 9a to 9d connected to the receiving antennas 8a to 8d, and coaxial cables 9a to 9d.
- a wireless unit 2a connected to the wireless unit 2a and a receiving body unit 2b connected to the wireless unit 2a.
- the image signals transmitted from the capsule endoscope 3 are received by the plurality of receiving antennas 8a to 8d, and the image signals are taken into the receiving main unit 2b via the wireless unit 2a.
- the receiving main unit 2b selects and receives the receiving antenna having the medium field strength of the receiving antennas 8a to 8d having the strongest receiving electric field strength, and sequentially receives the image signals received by this selection, and the capsule endoscope Fe the series of images until 3 is ejected from subject 1. .
- the portable recording medium 5 is detached from the receiver main unit 2b and attached to the display device 4.
- the display device 4 reads a series of images stored in the portable recording medium 5 and performs display processing.
- the capsule endoscope system including the capsule endoscope, the receiving device, and the display device as illustrated in FIG. 1 is configured to display an image in the subject captured by the capsule endoscope.
- a receiving device receives (acquires) via a receiving antenna, and a display device displays the acquired image in the subject.
- FIG. 2 is a block diagram showing a configuration of the receiving device 2.
- the wireless unit 2a is connected to the switching switches 20 and 22 that connect the receiving antennas 8a to 8d, the receiving circuit 21 that receives the received signal from the switching switch 20, and the switching switch 22, respectively. Disconnection detection circuit 23.
- the switching switch 20 When the switching signal S3 is input, the switching switch 20 is one instructed by the switching signal S3.
- the coaxial cable is selected from the coaxial cables 9a to 9d, and the receiving circuit 21 receives the image signal via the coaxial cable selected by the switching switch 20, and the baseband signal S1 including the image signal and the image signal are received.
- Received strength signal S2 indicating the received field strength is output to the receiving main unit 2b.
- the switching switch 22 converts the coaxial cable instructed by the switching signal S4 to the coaxial cables 9a to 9d.
- the selected coaxial cable is connected to the disconnection detection circuit 23.
- the disconnection detection circuit 23 checks the disconnection of the coaxial cable that has been selected and connected, and the result of this disconnection check is used as the detection signal S6 to receive unit 2b. Output to the side.
- the reception main unit 2b includes a signal processing circuit 24, an AZD conversion unit 25, a control unit 26 having a switching control unit 260, a display unit 27, a storage unit 28, and a removable portable recording medium. 5 and a power supply unit 29.
- the power supply unit 29 supplies power to each unit described above.
- the signal processing circuit 24 generates an image signal from the baseband signal S1 input from the receiving circuit 21 and outputs the image signal to the control unit 26.
- the AZD conversion unit 25 performs AZD conversion on the reception intensity signal S2 input from the reception circuit 21, and outputs the result to the control unit 26 as a digital signal indicating the reception electric field intensity.
- the control unit 26 records the image signal input from the signal processing circuit 24 in the portable recording medium 5, and performs processing control to display and output an image on the display unit 27 as necessary.
- the switching control unit 260 selects a receiving antenna having the maximum received electric field strength based on the digital signal indicating the received electric field strength input from the AZD conversion unit 25, and transmits the signal to the coaxial cable connecting the receiving antenna. Outputs switch signal S3 instructing switching to switch 20.
- the switching control unit 260 sends a switching signal S4 instructing switching of the coaxial cable for the disconnection check to the switching switch 22, and a control signal S5 instructing a disconnection check corresponding to the switching signal S4. Is output to the disconnection detection circuit 23 to obtain the detection signal S6.
- FIG. 3 is a block diagram showing a specific connection relationship between the receiving antenna 8a and the coaxial cable 9a.
- the receiving antenna 8a is an open antenna
- the coaxial cable 9a has a core wire 90a that is an inner conductor and an outer conductor 90A.
- the receiving antenna 8a and the coaxial cable 9a are connected by a transformer type balun 10.
- a coil is formed on each of the coaxial cable 9a side of the reception antenna 8a and the reception antenna 8a side of the coaxial cable 9a.
- the reception antenna 8a and the coaxial cable 9a are electromagnetically coupled to each other, and the reception antenna 8a that is a balanced line
- the leakage current caused by the connection with the coaxial cable 9a, which is an unbalanced line, is reduced.
- the coil on the coaxial cable 9a side is formed at the tip of the core wire 90a and grounded together with the outer conductor 90A.
- FIG. 4 is a block diagram showing a configuration centering on the disconnection detection circuit 23.
- the disconnection detection circuit 23 has a comparator 202 that compares an input voltage with a threshold voltage Vref and outputs the result as a detection signal S6.
- the threshold voltage Vrei3 ⁇ 4S is input to one input terminal of the comparator 202, and the core wire 90a is connected to the other input terminal.
- a DC power source 20 that outputs a DC voltage V via a switch 201 and a constant current source 203 is connected to the core wire 90a.
- the voltage V is the threshold
- a resistor may be used instead of the constant current source 203.
- the voltage between the input terminal and the ground is the ground voltage, and the voltage input to the other input terminal of the comparator 202 is equal to or lower than the threshold voltage Vref.
- the comparator 202 outputs a detection signal S6 indicating that the voltage input from the other input terminal is equal to or lower than the threshold voltage Vref, and the control unit 26 determines that there is no disconnection.
- This voltage V is directly applied to the other input terminal of the comparator 202.
- Comparator 202 has a threshold voltage (voltage V) input from the other input terminal.
- the detection signal S6 indicating that the value voltage is Vref or higher is output, and the control unit 26 determines that the circuit is disconnected.
- the control unit 26 outputs the switching signal S4, selects the next coaxial cable 9b, performs a disconnection check on the selected next coaxial cable 9b using the disconnection detection circuit 23, and similarly. Disconnection check for all the coaxial cables 9a to 9d. This Thus, the control unit 26 can immediately determine whether or not the coaxial cables 9a to 9d are disconnected and identify the coaxial cable that has been disconnected.
- control unit 26 may add a number to the coaxial cable in advance and display the number of the broken coaxial cable on the display unit 27. If no disconnection is detected, a message indicating that there is no disconnection may be displayed on the display unit 27.
- the switching control unit 260 of the control unit 26 described above makes the switching signals S3 and S4 the same signal and detects disconnection of the switched coaxial cable when the image signal is being received.
- the switching between the switching switches 20 and 22 may be separated in time to detect disconnection in a gap where reception processing is not performed.
- disconnection detection may be performed when the receiving device 2 is not performing reception processing, such as before inspection or after inspection.
- the control unit 26 may perform control without switching to the reception antenna connected to the disconnected coaxial cable.
- the coaxial cables 9a to 9d are branched, and a DC voltage can be applied to the branched coaxial cables to easily detect the presence or absence of the disconnection, and the disconnection of the coaxial cable can be quickly identified. It can be carried out.
- the force is not limited to the number of forces described by showing the four coaxial cables 9a to 9d.
- the result of the disconnection check may differ for each disconnection check.
- the control unit 26 stores the result of the disconnection check of each coaxial cable in the storage unit 28, and displays a warning display for prompting replacement on the display unit 27 when the disconnection is detected a predetermined number of times. You may do so.
- FIG. 6 is a diagram showing a connection relationship between the receiving antenna 81a corresponding to the receiving antenna 8a shown in FIG. 5 and the coaxial cable 9la corresponding to the coaxial cable 90A shown in FIG. As shown in FIG. 6, one end of the open receiving antenna 81a is connected to the core wire 91a, and the other end is connected to the grounded external conductor 91A.
- Other configurations are the same as those in the first embodiment, and the same components are denoted by the same reference numerals.
- the core wire 91a and the external conductor 91A are connected by the short-circuit element 10A, and the short-circuit element 10A is connected to the DC conductor from the core wire 91a to the external conductor 91A Forgive me for being grounded.
- the voltage between the core 91a and the ground is the ground voltage, and the voltage input to the other input terminal of the comparator 202 is equal to or lower than the threshold voltage Vref.
- the comparator 202 outputs a detection signal S6 indicating that the voltage input from the other input terminal is equal to or lower than the threshold voltage Vref, and the control unit 26 determines that there is no disconnection.
- this voltage V is applied to the other input terminal of the comparator 202 as it is.
- the voltage (voltage V) input from the other input terminal is equal to or higher than the threshold voltage Vref.
- a detection signal S6 indicating the presence is output, and the control unit 26 determines that there is a disconnection.
- the control unit 26 outputs the switching signal S4, selects the next coaxial cable 9b, performs a disconnection check on the selected next coaxial cable 9b using the disconnection detection circuit 23, and similarly. Disconnection check for all the coaxial cables 9a to 9d. As a result, the control unit 26 can immediately determine whether or not the coaxial cables 9a to 9d are disconnected and identify the coaxial cable that has been disconnected.
- the receiving antennas 8a and 8la are both open-type, and the core wires 90a and 9la are the forces that are grounded via the transformer-type balun 10 and the short-circuit element 10A, respectively.
- the receiving antenna is a loop type, and the core wire is grounded via the loop type receiving antenna.
- FIG. 7 is a diagram showing a connection relationship between the receiving antenna 82a and the coaxial cable 92a. As shown in FIG. 7, one end of the loop-type receiving antenna 82a is connected to the core wire 92a of the coaxial cable 9a, and the other end is connected to the grounded external conductor 92A. Other configurations are the same as those of the first and second embodiments, and the same components are denoted by the same reference numerals.
- the voltage V is applied to the core wire 92a via the constant current source 203 by "closing" the switch 201, and the loop-type receiving antenna 82a is connected.
- the voltage between the core wire 9 la and the ground is the ground voltage, and the voltage input to the other input terminal of the comparator 202 is equal to or lower than the threshold voltage Vref.
- the comparator 202 outputs a detection signal S6 indicating that the voltage input from the other input terminal is equal to or lower than the threshold voltage Vref, and the control unit 26 determines that there is no disconnection.
- this voltage V is applied to the other input terminal of the comparator 202 as it is.
- the voltage (voltage V) input from the other input terminal is equal to or higher than the threshold voltage Vref.
- a detection signal S6 indicating the presence is output, and the control unit 26 determines that there is a disconnection.
- the control unit 26 outputs the switching signal S4, selects the next coaxial cable 9b, performs a disconnection check on the selected next coaxial cable 9b using the disconnection detection circuit 23, and similarly. Disconnection check for all the coaxial cables 9a to 9d. As a result, the control unit 26 can immediately determine whether or not the coaxial cables 9a to 9d are disconnected and identify the coaxial cable that has been disconnected.
- FIG. 8 is a schematic diagram showing the overall configuration of a wireless in-vivo information acquiring system. As shown in FIG. 8, the wireless in-vivo information acquiring system is introduced into the body of the receiving device 102 having a wireless receiving function and the subject 1, and images a body cavity image as in-subject information.
- a capsule endoscope (in-vivo introducing device) 103 that transmits data such as a video signal to the receiving device 102 is provided.
- the wireless in-vivo information acquiring system includes a display device 104 that displays an image of a body cavity based on a video signal received by the receiving device 102, and data transfer between the receiving device 102 and the display device 104.
- the receiving device 102 includes a wireless unit 102a having a plurality of receiving antennas Al to An attached to the external surface of the subject 1 and a wireless signal received via the plurality of receiving antennas Al to An.
- a receiving body unit 102b that performs processing and the like, and these units are detachably connected via a connector or the like.
- Each of the receiving antennas Al to An is provided, for example, in a jacket on which the subject 1 can be worn, and the subject 1 wears the receiving antennas Al to An by wearing this jacket. Also good.
- the receiving antennas Al to An may be detachable from the jacket.
- the display device 104 is for displaying an in-vivo image captured by the capsule endoscope 103, and a workstation that displays an image based on data obtained by the portable recording medium 105. And so on.
- the display device 104 may be configured to directly display an image using 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 105 uses a Compact Flash (registered trademark) memory or the like, is detachable from the receiving main unit 102b and the display device 104, and outputs or records information when both are mounted. It has possible functions. Specifically, the portable recording medium 105 is inserted into the receiving body unit 102b and transmitted from the capsule endoscope 103 while the capsule endoscope 103 is moving in the body cavity of the subject 1. Data force to be recorded on portable recording medium 105. Then, after the capsule endoscope 103 is ejected from the subject 1, that is, after the imaging of the inside of the subject 1 is finished, the capsule endoscope 103 is taken out from the reception main body unit 102b and inserted into the display device 104, and displayed.
- a Compact Flash registered trademark
- Data recorded by device 104 is read Extruded.
- Data transfer between the receiving main unit 102b and the display device 104 is performed by a portable recording medium 105 such as a compact flash (registered trademark) memory, so that the receiving main unit 102b and the display device 104 are connected by wire.
- the subject 1 can move freely during imaging in the body cavity, and also contributes to shortening the time for transferring data to and from the display device 104.
- the power of using the portable recording medium 105 for data transfer between the receiving main unit 102b and the display device 104 is not necessarily limited to this.
- Other built-in recording devices are used for the receiving main unit 102b. In order to exchange data with the display device 104, both may be configured to be wired or wirelessly connected.
- FIG. 9 is a block diagram showing a configuration of receiving apparatus 102.
- the radio unit 102a receives the radio signal transmitted from the capsule endoscope 103 and demodulates it into a baseband signal.
- the wireless unit 102a is connected to a switching switch SW that performs connection switching processing for selectively switching any one of the receiving antennas Al to An, and is connected to the subsequent stage of the switching switch SW.
- a receiving circuit 111 for amplifying and demodulating radio signals from the receiving antennas Al to An that are switched and connected by the switch SW.
- Reception main body unit 102b receives and processes the baseband signal demodulated by radio unit 102a.
- the reception main unit 102b is configured to receive the image data processed by the signal processing circuit 112, the AZD conversion unit 113, and the signal processing circuit 112 connected to the subsequent stage of the reception circuit 111 and information on various input processes.
- Display unit 114 for displaying, storage unit 115 for storing various information, portable information recording medium 5, control unit C1 for controlling each of these components, and power supply to receiving main unit 102b and wireless unit 102a
- a power supply unit 116 is included.
- the control unit C1 includes a switching control unit C1a that performs antenna switching control.
- Receiving circuit 111 amplifies the high-frequency signal output from switching switch SW, outputs demodulated baseband signal S11 to signal processing circuit 112, and also receives a received intensity signal indicating the signal strength of the amplified high-frequency signal.
- S 12 is output to the AZD converter 113.
- Signal processing The image data processed by the circuit 112 is recorded on the portable recording medium 105 by the control unit CI and displayed on the display unit 114 as necessary.
- the reception intensity signal S12 converted into a digital signal by the AZD conversion unit 113 is taken into the control unit C1.
- the switching control unit Cla receives a receiving antenna received at the highest signal strength based on the received strength signal S12 obtained by sequentially switching the receiving antennas Al to An to obtain image data.
- a switching signal S13 instructing switching to this antenna is output to the switching switch SW.
- the control unit C1 records the signal strength received by each receiving antenna together with the image data in the portable recording medium 105 in association with the selected receiving antenna. The recorded signal strength of each receiving antenna is used for detecting the disconnection of the antenna, which will be described later, and for calculating the position of the capsule endoscope 103 in the body when the image data is received. Information.
- FIG. 10 is a block diagram showing the configuration of the display device 104.
- the display device 104 is realized by a personal computer or the like, further processes the image data recorded on the portable recording medium 105, performs patient diagnosis based on the processed series of image data, and further Can create diagnostic reports and more.
- the display device 104 is realized by a pointing device such as a keyboard and a mouse.
- the display device 104 is realized by an input unit 121 for inputting various information, a liquid crystal display, and various information such as processed image data.
- Display unit 122 for displaying and output, output unit 123 realized by a printer, storage unit 124 for storing various information including image data, removable portable recording medium 105, communication connection processing with external network Realized by external communication interface 12 5 and CPU, etc., and has control unit C2 that controls each unit described above
- the storage unit 124 performs statistical processing on statistical changes in the received electric field strength of the receiving antennas Al to An based on the arrangement of the receiving antennas Al to An at the time of acquiring past image data.
- Data 124a is stored.
- the control unit C2 has a disconnection detection processing unit C2a, and the disconnection detection processing unit C2a receives the reception electric field of each reception antenna Al to An added together with the image data acquired from the portable recording medium 105.
- Strength change over time Data and statistical data 124a are compared, and the receiving antennas Al to An used to acquire this image data are in a disconnected state! / ⁇ indicates that the receiving antenna and the switching switch are in a poor connection state. Is detected, and the result is output to the display unit 122 or the like.
- the received electric field strength changes with time as shown in the received electric field strength profile files 131 and 132 in FIG.
- the average value Avl to Avn of the total received electric field strength for each receiving antenna A1 to An is Sought and retained.
- the disconnection detection processing unit C2a obtains an average value RAvl to RAvn of the total received electric field strengths for each receiving antenna Al to An currently obtained, and calculates an average value Av 1 for each receiving antenna A 1 to An.
- ⁇ Avn and average values RAv 1 to RAvn are compared, and if there is a receiving antenna whose average values RAvl to RAvn are 50% or less of the average value Avl to Avn, this receiving antenna is disconnected or poorly connected. And the determination result is output to the display unit 122.
- the capsule endoscope 103 It takes about 8 hours for the capsule endoscope 103 to be introduced into the subject 1 and for the force to be discharged, but if the receiving antenna is disconnected during that time, the receiving antenna is switched. Without selection, the received electric field strength profile to be detected does not appear in the second half as shown in FIG. 12 (that is, the received electric field strength profile 141 appears only in the first half). This reduces the total received electric field strength of the disconnected receiving antenna, and as described above, the receiving antenna having an average value of the total received electric field strength equal to or lower than the threshold value is considered to be disconnected or poorly connected. To be judged.
- the average values Avl to Avn and RAvl to RAvn do not have to be for the period when the capsule endoscope 103 is introduced into the subject 1.
- the capsule endoscope 103 It is also possible to find the average value for a predetermined period that goes back from Sample 1 and compare them to detect disconnection or poor connection.
- this receiving antenna when there is a receiving antenna in which the temporal change of the received electric field strength in the receiving state changes greatly continuously for a predetermined period, this receiving antenna is connected as a precursor of disconnection. Since it is considered that a failure has occurred, this receiving antenna may be determined to be disconnected or defective. In this case, statistical data 124a is not necessarily required. Whether or not the received electric field strength changes greatly can be obtained by differentiating the temporal change of the received electric field strength.
- a typical time change profile of the reception electric field strength of each of the receiving antennas Al to An is held in the statistical data 124a, and the disconnection detection processing unit C2a receives the typical time change profile. Then, obtain the correlation with the time variation profile of the received electric field strength of each receiving antenna Al to An that is currently obtained, and based on this correlation value, determine that the receiving antenna is disconnected or poorly connected.
- the statistical data of the received electric field strength of each receiving antenna obtained in the past is compared with the received electric field strength data of each receiving antenna obtained in the past. Since it is possible to detect an antenna disconnection or poor connection, it is possible to easily check the antenna disconnection and increase the reliability of the antenna disconnection check. The reason why the reliability of this antenna disconnection check is increased is that it is possible to detect a disconnection of a strong receiving antenna that cannot be detected by another antenna disconnection check.
- a radio signal including in-subject information is converted into each received electric field strength using a plurality of antennas.
- the statistical data holding means holds the statistical data of the received electric field strength for each antenna
- the disconnection detecting means has the statistical data and Compared to the received field strength data for each antenna that is actually received, the disconnection detection processing for each antenna is performed, so disconnection detection can be performed as part of information acquisition such as detection, and simple In addition, the antenna disconnection can be detected in a short time.
- the disconnection detection is performed using the statistical data 124a.
- the received electric field strength of the receiving antenna actually obtained without using the statistical data 124a. Disconnection detection is performed based on the above data.
- the disconnection detection processing unit C2a acquires the received electric field strength data of each receiving antenna added together with the image data obtained from the portable recording medium 105, and acquires this data. If the receiving field strength of the receiving antenna is almost equal to zero, it is determined that the receiving antenna is disconnected or poorly connected.
- the disconnection detection may be performed using only the selection switching data of each receiving antenna rather than the data of the received electric field strength of each receiving antenna.
- the disconnection detection processing unit C2a determines that a receiving antenna that has never been selected is disconnected or has a poor connection.
- disconnection detection of each receiving antenna is performed based on the size of the obtained image data.
- the image data obtained by each of the receiving antennas Al to An is subjected to compression processing such as JPEG by the receiving main unit 102b, and is recorded on the portable recording medium 105.
- compression processing such as JPEG
- the receiving main unit 102b When a connection failure occurs in the receiving antennas Al to An, noise is mixed in the image data, and the image data size increases when image compression is performed.
- the disconnection detection processing unit C2a based on the obtained image data and the antenna selection information at the time of obtaining the image data, when the size of the obtained image data is outside a predetermined range, It is determined that the receiving antenna at the time of image data acquisition is disconnected or poorly connected.
- the receiving main unit 102b detects the disconnection of each receiving antenna based on the loss of synchronization of the video signal. Like to do.
- the high-frequency signal received by each of the receiving antennas Al to An is sent to the receiving main unit 102b as a baseband video signal by the wireless unit 102a, and the receiving main unit 102b receives the horizontal synchronization signal of this video signal. In this way, image data is generated while performing horizontal synchronization with the vertical synchronization signal and vertical synchronization with the vertical synchronization signal.
- the disconnection detection processing unit C2 a is disconnected when the total number of out-of-synchronizations for each reception antenna is greater than or equal to a predetermined value, or when there is a concentration of out-of-sync !, Determines that a connection failure has occurred.
- the synchronization loss can be counted by the receiving main unit 102b, and the counted value is recorded on the portable recording medium 105 together with the antenna selection information.
- the disconnection of each receiving antenna is detected based on the number of errors in the error detection signal included in the video signal.
- the receiving main unit 102b when the video signal transmitted from the capsule endoscope 103 includes an error detection signal, the receiving main unit 102b generates image data based on the video signal. Error detection processing is performed. The receiving main unit 102b records the number of error detections on the portable recording medium 105 together with the antenna selection information.
- the disconnection detection processing unit C2a determines a receiving antenna that has received the error detected image data based on the antenna selection information. When the determined receiving antenna is disconnected, it is determined that the connection is poor.
- the disconnection detection is performed on the display device 104 side.
- the present invention is not limited to this, and corresponds to the disconnection detection processing unit C2a on the reception body unit 102b side.
- a disconnection detection processing unit may be provided, and the disconnection detection result may be recorded in the portable recording medium 105.
- the switching control unit Cla controls the antenna that has been detected to be disconnected so as not to select this antenna by removing the antenna force to be selected and switched. Further, when this disconnection is detected, that fact may be displayed on the display unit 114 or the like or notified. As a result, it is possible to quickly find a useless inspection, and it is possible to take measures to avoid the useless inspection by exchanging the entire receiving antenna or the wireless unit 102a in which disconnection is detected.
- Embodiments 5 to 8 statistical data is not particularly used. However, data when a receiving antenna that is not disconnected or poorly connected and a receiving antenna that is disconnected or poorly connected are used.
- the threshold value for determining disconnection or poor connection may be obtained statistically based on the data at the time of failure.
- an in-subject information acquisition system for acquiring image data in a subject by introducing a capsule endoscope into the subject will be described, and then the capsule in the powerful in-subject information acquisition system will be described.
- a reception antenna disconnection inspection method (that is, an example of a disconnection inspection method according to the ninth embodiment of the present invention) included in a reception device that receives a radio signal of a type endoscopic force will be described.
- FIG. 14 is a schematic diagram schematically illustrating a configuration example of the in-vivo information acquiring system according to the ninth embodiment.
- the in-subject information acquisition system according to the ninth embodiment includes a capsule endoscope 302 that moves along the passage path in the subject 1 and images the inside of the subject 1.
- a receiver 303 that receives a radio signal including image data captured by the capsule endoscope 302, and an image in the subject 1 is displayed based on the image data captured by the capsule endoscope 302.
- Workstation 306 and receiving A portable recording medium 307 for transferring data between the communication device 303 and the workstation 306 is provided.
- the in-vivo information acquiring system includes a portable monitor device 309 that is connected to the receiving device 303 via the cable 308 and sequentially displays the image data acquired by the receiving device 303.
- the capsule endoscope 302 has a capsule-type housing structure that is easily introduced into the subject 1, and is obtained by imaging the inside of the subject 1 and an imaging function for imaging the inside of the subject 1. And a wireless communication function for transmitting the received image data to the external receiving device 303.
- the capsule endoscope 302 passes through the esophagus in the subject 1 by being swallowed by the subject 1, and advances in the body cavity by the peristalsis of the extinguishing lumen.
- the capsule endoscope 302 sequentially captures images in the body cavity of the subject 1 and sequentially transmits wireless signals including the obtained image data in the subject 1 to the receiving device 303.
- the receiving device 303 receives a radio signal from the capsule endoscope 302 introduced into the subject 1 and acquires image data from the capsule endoscope 302 based on the radio signal. belongs to. Specifically, the receiving device 303 includes an antenna unit 304 to which a plurality of receiving antennas 304a to 304f that receive radio signals from the capsule endoscope 302 are connected, and various processes for sequentially acquiring image data. It is realized by using the apparatus main body 305 that performs the above. The receiving device 303 receives a radio signal from the capsule endoscope 302 via any of the receiving antennas 304a to 304f, demodulates the radio signal into an image signal, and encapsulates based on the obtained image signal. Image data from the mold endoscope 302 is acquired. In this case, the receiving apparatus 303 sequentially stores the image data obtained by the capsule endoscope 302 in this manner in a portable recording medium 307 that is detachably inserted into the apparatus main body 305.
- the receiving antennas 304a to 304f are realized by using, for example, a loop antenna, and receive a radio signal transmitted by the capsule endoscope 302.
- the receiving antennas 304a to 304f are dispersedly arranged at predetermined positions on the body surface of the subject 1, for example, at positions corresponding to the passage route of the capsule endoscope 302 as shown in FIG.
- the receiving antennas 304a to 304f may be arranged at predetermined positions of a jacket worn by the subject 1.
- the receiving antennas 304a to 304f are arranged at predetermined positions on the body surface of the subject 1 when the subject 1 wears this jacket.
- subject 1 has one or more receiving antennas.
- a plurality of receiving antennas are arranged in a distributed manner. In this case, the number of receiving antennas is not particularly limited to six.
- the workstation 306 is for displaying an image in the subject 1 imaged by the capsule endoscope 302, and is used for image data obtained through the portable recording medium 307. Based on the image of the organ or the like in the subject 1 (that is, the image taken by the capsule endoscope 30 2).
- the workstation 306 has a processing function for a doctor or nurse to observe the image of an organ or the like in the subject 1 by the capsule endoscope 302 to diagnose the subject 1.
- the workstation 306 has an initialization processing function for initially setting the receiving device 303 as a receiving device for performing a capsule endoscope examination on the subject 1.
- the portable recording medium 307 is portable recording media such as CompactFlash (registered trademark).
- the portable recording medium 307 is detachable with respect to the apparatus main body 305 and the work station 306 of the receiving apparatus 303, and has a structure capable of outputting and recording data when inserted into both. Specifically, when the portable recording medium 307 is inserted into the receiving apparatus 303, the image data from the capsule endoscope 302 acquired in the receiving apparatus 303 is sequentially stored.
- the portable recording medium 307 is taken out from the receiving device 303 and inserted into the workstation 306 after the capsule endoscope 302 is ejected from the subject 1.
- the workstation 306 can capture various data such as image data in the subject 1 stored in the inserted portable recording medium 307.
- the portable device 307 uses the portable recording medium 307 to exchange data between the receiving device 303 and the workstation 306, so that the subject 1 can be connected to the receiving device 303 and the workstation 300 by a communication cable or the like. Unlike the case in which the capsule endoscope 302 is moving inside the subject 1, the receiving apparatus 303 can be freely moved even when the capsule endoscope 302 is moving inside the subject 1.
- the monitor device 309 is for displaying the image data acquired from the capsule endoscope 302 by the receiving device 303 in real time. Specifically, the monitor device 309 is connected to the device body 305 via the cable 308 and receives image data acquired by the receiving device 303 from the receiving device 303.
- the monitoring device 309 is The image data received from the receiving device 303 is sequentially displayed on the monitor. That is, the monitor device 309 acquires image data obtained by the capsule endoscope via the powerful receiving device 303, and sequentially displays the acquired image data on the monitor.
- the monitor device 309 has a wireless communication function for receiving a radio signal from the capsule endoscope without going through the receiving device 303, and image data from the capsule endoscope 302 based on the received radio signal. To get. In this case, the monitor device 309 sequentially displays and displays the image data obtained by the capsule endoscope 302 without passing through the receiving device 303.
- FIG. 15 is a block diagram schematically showing a configuration example of the receiving device 303 and the monitoring device 309 connected via the cable 308. As shown in FIG. With reference to FIG. 15, the configuration of receiving apparatus 303 will be described first, and then the configuration of monitoring apparatus 309 will be described.
- receiving device 303 is formed by connecting antenna unit 304 and device main body 305 via connector 330.
- the antenna unit 304 is connected to the plurality of receiving antennas 304a to 304f, and the antenna switching unit 331 that switches the receiving power of the receiving antennas 304a to 304f to a receiving antenna suitable for radio signal reception and the receiving antenna 304a.
- the radio signal received through any one of ⁇ 304f is decoded into an image signal, and the reception circuit 332 for detecting the reception electrolysis intensity of the radio signal and the reception electric field intensity detected by the reception circuit 332 are also obtained.
- a switching control circuit 333 for controlling the antenna switching operation of the antenna switching unit 331.
- the apparatus main body 305 is generated by a signal processing circuit 334 that generates image data by the capsule endoscope 302 based on the image signal demodulated by the receiving circuit 332 and a signal processing circuit 334.
- a storage unit 335 for storing image data and the like, an input unit 336 for inputting instruction information for instructing activation or various operations of the receiving device 303, and a display unit 337 for displaying information on the subject 1 or the like.
- the apparatus main body 305 includes a communication interface (IZF) 338 for transmitting image data and the like to the monitor device 309 via the cable 308, a control unit 339 that controls driving of each component of the reception device 303, A power supply unit 340 that supplies driving power to each component of the reception device 303.
- IZF communication interface
- the antenna switching unit 331 switches the medium power of a plurality of receiving antennas 304a to 304f.
- the receiving circuit 332 function to perform an antenna switching operation.
- the antenna switching unit 331 performs the antenna switching operation based on the control of the switching control circuit 333, and any of the receiving antennas 304a to 304f suitable for receiving the non-related signal from the capsule endoscope 302.
- the heel and the receiving circuit 332 are electrically connected.
- the powerful antenna switching unit 331 outputs the radio signal from the capsule endoscope 302 received via the reception antenna that has selected the medium power of the reception antennas 304 a to 304 f to the reception circuit 332.
- the receiving circuit 332 has a demodulation processing function for demodulating the radio signal input from the antenna switching unit 331 into a baseband signal, and a received intensity detecting function for detecting the received electric field strength of the radio signal. Specifically, the reception circuit 332 performs demodulation processing and the like on the radio signal input from the antenna switching unit 331, and demodulates the radio signal into an image signal that is a baseband signal. This image signal is a baseband signal including image data captured by the capsule endoscope 302. The receiving circuit 332 outputs the obtained image signal to the signal processing circuit 334.
- the receiving circuit 332 detects the received electric field strength of the strong radio signal, and sends a signal indicating the detected received electric field strength, for example, RSSI (Received Signa 1 Strength Indicator) to the switching control circuit 333. Output.
- RSSI Receiveived Signa 1 Strength Indicator
- the switching control circuit 333 is for controlling the antenna switching operation by the antenna switching unit 331 described above. Specifically, the switching control circuit 333 receives a radio signal from the plurality of reception antennas 304a to 304f based on a signal (for example, RSSI signal) indicating the reception electric field strength input from the reception circuit 332. The antenna switching operation of the antenna switching unit 331 is controlled so that the receiving antenna having the highest electric field strength is selected and the receiving antenna thus selected and the receiving circuit 332 are electrically connected.
- a signal for example, RSSI signal
- the signal processing circuit 334 is for generating image data based on the image signal demodulated by the receiving circuit 332. Specifically, the signal processing circuit 334 performs predetermined image processing or the like on the image signal demodulated by the reception circuit 332, and outputs image data from the capsule endoscope 302 based on the image signal. Generate. The signal processing circuit 334 outputs the obtained image data to the control unit 339.
- the storage unit 335 can removably insert the above-described portable recording medium 307, and data instructed to be stored by the control unit 339, for example, image data generated by the signal processing unit 34. Are sequentially stored in the portable recording medium 307.
- the storage unit 335 may be configured such that the storage unit 335 itself stores various types of information such as image data by having a memory IC such as a RAM or a flash memory!
- the input unit 336 is realized by using an input button for inputting instruction information to be instructed to the control unit 339. For example, an instruction to display information on the subject 1 on the display unit 337 according to an input operation by the user. Are input to the control unit 339.
- the display unit 337 is realized by using a thin display such as a liquid crystal display device or an organic EL panel, and displays information instructed to be displayed by the control unit 339, for example, information on the subject 1.
- the display unit 337 may have an information input function such as a touch panel, and may be configured to input instruction information to the control unit 339 instead of the input unit 336. In this case, the reception device 303 may not include the input unit 336.
- the communication IZF 338 is for transmitting the image data acquired by the receiving device 303 to the monitor device 309. Specifically, the communication I / F 338 is connected to the monitor device 309 via the cable 308, and the image data generated by the signal processing unit 34 (that is, image data captured by the capsule endoscope 302). Is transmitted to the monitor device 309.
- the control unit 339 is realized by using a CPU that executes a processing program, a ROM that stores processing programs and the like, and a RAM that stores calculation parameters or input information to the control unit 339.
- the drive of each component of the device 303 is controlled.
- the control unit 339 performs input / output control of information with respect to each component unit, and performs data storage operation, data read operation, and display for the storage unit 335 (specifically, the portable recording medium 307).
- the display operation by the unit 337 and the image data transmission operation to the monitor device 309 via the communication I / F 338 are controlled.
- Such a control unit 339 performs various processes based on the instruction information input by the input unit 336.
- control unit 339 has an operation confirmation unit 339a.
- the operation confirmation unit 339a performs a self-diagnosis process using the instruction information input from the input unit 336 as a trigger to confirm whether each component unit of the reception device 303 operates normally.
- the operation confirmation unit 339a includes the antenna switching unit 331, the reception circuit 332, the switching control circuit 333, the signal processing circuit 334, the storage 335, input unit 336, display unit 337, communication lZF338, control unit 339, and power supply unit 340 are determined to determine whether the power is normal, and each of these components operates normally. Diagnose whether it is possible.
- the operation check unit 339a also determines whether the monitor display operation of the monitor device 309 connected via the cable 308 is normally performed, that is, the image data generated by the signal processing circuit 334 is the monitor device 309. Diagnose whether or not the monitor can be displayed.
- the control unit 339 causes the display unit 337 to display the diagnosis result from the profitable operation confirmation unit 339a.
- the power supply unit 340 supplies drive power to each component of the receiving device 303 when a power switch (not shown) provided in the device main body 305 is switched to the on state.
- Examples of the power supply unit 340 include a dry battery, a lithium ion secondary battery, or a nickel metal hydride battery.
- the power supply unit 340 may be rechargeable.
- the monitor device 309 includes a reception antenna 390 for receiving a radio signal from the capsule endoscope 302, and a reception circuit that demodulates the radio signal received via the reception antenna 390 into an image signal. 391 and a signal processing circuit 392 that generates image data by the capsule endoscope 302 based on the image signal demodulated by the receiving circuit 391.
- the monitor device 309 also receives a connection detection unit 393 that detects a connection between the reception device 303 and the monitor device 309 via the cable 308, and image data from the reception device 303 via the cable 308.
- the monitor device 309 includes an input unit 396 that inputs instruction information for instructing the control unit 96, a display unit 397 that displays and displays image data and the like, and a control unit that controls driving of each component of the monitor device 309 398 and a power supply unit 399 that supplies driving power to each component of the monitor device 309.
- the reception antenna 390, the reception circuit 391, and the signal processing circuit 392 receive a radio signal from the capsule endoscope 302 when the reception device 303 and the monitor device 309 are not connected, and this radio To acquire image data from the capsule endoscope 302 based on the signal It is intended.
- the reception antenna 390 receives a radio signal from the capsule endoscope 302 and outputs the received radio signal to the reception circuit 391.
- the receiving circuit 391 demodulates the radio signal received via the receiving antenna 390 into an image signal, and outputs the obtained image signal to the signal processing circuit 392.
- the signal processing circuit 392 generates image data from the capsule endoscope 302 based on the image signal demodulated by the receiving circuit 391, and outputs the obtained image data to the switch circuit 395.
- the monitor device 309 acquires image data from the capsule endoscope 302 without passing through the reception device 303. This image data can be displayed on the monitor 397 on a monitor.
- the connection detection unit 393 is for detecting the connection between the reception device 303 and the monitor device 309. Specifically, the connection detection unit 393 detects the electrical continuity associated with the connection between the reception device 303 and the monitor device 309 via the cable 308, thereby connecting the reception device 303 and the monitor device 309. Detect the effect. When the connection detection unit 393 detects the connection between the reception device 303 and the monitor device 309, the connection detection unit 393 outputs a detection result indicating that the connection is detected to the control unit 398.
- Communication IZF 394 is for receiving image data transmitted from receiving device 303 via cable 308. Specifically, the communication IZF 394 is connected to the communication IZF 338 of the reception device 303 via the cable 308, and inputs image data output from the communication IZF 338, that is, image data acquired by the reception device 303. The communication IZF 394 outputs the obtained image data to the switch circuit 395.
- the switch circuit 395 performs a switching operation to electrically connect any one of the signal processing circuit 392 and the communication IZF 394 and the control unit 398 in response to the connection Z not connected between the reception device 303 and the monitor device 309. Do. Specifically, the switch circuit 395 electrically connects the communication IZF 394 and the control unit 398 based on the control of the control unit 398 when the reception device 303 and the monitor device 309 are connected, and When the monitor device 309 is not connected, the signal processing circuit 392 and the control unit 398 are electrically connected based on the control of the control unit 398. That is, in the switch circuit 395, the receiving device 303 and the monitoring device 309 are connected.
- the image data from the communication IZF 394 (image data acquired by the receiving device 303) is output to the control unit 398, and is generated by the signal processing circuit 392 when the receiving device 303 and the monitor device 309 are not connected.
- the image data is output to the control unit 398.
- the input unit 396 is realized by using an input button for inputting instruction information to be instructed to the control unit 398, and controls, for example, instruction information for instructing driving start of each component according to an input operation by the user. Enter in part 398.
- the display unit 397 is realized by using a thin display such as a liquid crystal display device or an organic EL panel, and information indicated by the control unit 398, for example, image data received from the reception device 303 via the cable 308 or reception The acquired image data or the like without using the device 303 is displayed on the monitor.
- the display unit 397 has an information input function such as a touch panel, and inputs instruction information for instructing the control unit 398 to the control unit 398.
- the control unit 398 is realized by using a CPU that executes a processing program, a ROM that stores processing programs and the like in advance, and a RAM that stores calculation parameters or input information to the control unit 398.
- the driving of each component of the device 309 is controlled.
- the control unit 398 performs input / output control of information with each component unit, and controls the monitor display operation by the display unit 397 and the detection operation of the connection detection unit 393.
- control unit 398 controls the switching operation of the switch circuit 395 described above. Specifically, when the control unit 398 receives a detection result indicating that the connection between the reception device 303 and the monitor device 309 is detected from the connection detection unit 393, the communication IZF394 and the control unit 398 are electrically connected. If the detection result indicating that the connection between the reception device 303 and the monitor device 309 is detected is not received from the connection detection unit 393, the signal processing circuit 392 and the control unit are controlled. The switching operation of the switch circuit 395 is controlled so that 398 is electrically connected.
- the power supply unit 399 supplies drive power to each component of the monitor device 309 when a power switch (not shown) provided in the monitor device 309 is turned on.
- Examples of the power supply unit 399 include a dry battery, a lithium ion secondary battery, or a nickel metal hydride battery.
- the power supply unit 399 may be rechargeable.
- the monitor device 309 adopting such a configuration is connected to a receiving device 303 via a cable 308. , The image data obtained by the capsule endoscope 302 is received via the receiving device 303, and the received image data, that is, the image data acquired by the receiving device 303 is sequentially displayed on a monitor in real time. It works as follows.
- FIG. 16 is a block diagram schematically showing a configuration example of a disconnection inspection apparatus for performing a disconnection inspection of a receiving antenna based on the disconnection inspection method according to the ninth embodiment of the present invention.
- the disconnection inspection device 310 includes an input unit 311 for inputting various instruction information, and an imaging unit 312 for capturing a natural image to be transmitted for performing a disconnection inspection of the receiving antenna.
- the image processing unit 313 generates an image signal including a natural image captured by the imaging unit 312, and the pattern image generation unit 314 generates an image signal including a pattern image of a predetermined pattern set in advance.
- the disconnection inspection device 310 is input via the switch circuit 315 and the switch circuit 315 for outputting the image signal from the image processing unit 313 or the image signal from the pattern image generation unit 314 to the transmission circuit 316.
- a transmission circuit 316 that modulates the image signal to generate a test radio signal (hereinafter referred to as a test radio signal), and a transmission antenna 317 that outputs the test radio signal generated by the transmission circuit to the outside.
- the disconnection inspection device 310 includes a control unit 318 that controls driving of each component of the disconnection inspection device 310 and a power supply unit 319 that supplies drive power to each component of the disconnection inspection device 310.
- the input unit 311 is realized by using an input button for inputting instruction information instructed to the control unit 318.
- instruction information instructed to the control unit 318 In response to an input operation by the user, for example, an instruction to start outputting a test radio signal to the outside or a test radio
- An instruction to switch the test image output by the signal to the above-described natural image or non-turn image is input to the control unit 318. Note that this test image is a shift between the natural image and the pattern image described above.
- the imaging unit 312 is transmitted as a test image for performing a disconnection inspection of the receiving antenna. It is for capturing natural images.
- the imaging unit 312 is realized using a light emitting element such as an LED, an imaging element such as a CCD or a CMOS, and an optical system such as a lens.
- the imaging unit 312 receives the reflected light from the subject by the illumination light irradiated on the desired imaging field, and captures a desired natural image by photoelectrically converting the received reflected light.
- the imaging unit 312 outputs the obtained natural image data to the image processing unit 313.
- the image processing unit 313 is for generating an image signal including image data of a natural image captured by the imaging unit 312. Specifically, the image processing unit 313 performs predetermined signal processing on the image data input from the imaging unit 312 to generate an image signal including natural image data. The image processing unit 313 outputs the obtained image signal to the switch circuit 315.
- the non-turn image generation unit 314 is for generating an image signal including a pattern image of a predetermined pattern set in advance as image data. Specifically, the pattern image generation unit 314 generates a pattern image having a pattern instructed by the control unit 318 to generate a plurality of types of patterns, and outputs image data of the generated pattern image. An image signal including the image signal is generated. The pattern image generation unit 314 outputs the obtained image signal to the switch circuit 315. Examples of the pattern image include a color bar formed by a predetermined color, a gray scale, a gradation gray scale based on a predetermined ramp waveform, a white image, and a black image.
- the switch circuit 315 is for switching the test image included in the test radio signal transmitted to the outside to either the natural image or the pattern image described above. Specifically, the switch circuit 315 electrically connects one of the image processing unit 313 and the pattern image generation unit 314 and the transmission circuit 316 under the control of the control unit 318 based on the instruction information input by the input unit 311. The switching operation connected to is performed. In this case, the switch circuit 315 performs an image signal from the image processing unit 313 (that is, an image signal of a natural image) and an image signal of the pattern image generation unit 314 by a switching operation based on the control of the powerful control unit 318. Any one (that is, an image signal of a pattern image) is output to the transmission circuit 316.
- the transmission circuit 316 is for modulating an image signal including image data of a test image into a test radio signal. Specifically, the transmission circuit 316 performs modulation processing and power amplification processing on the image signal received from the image processing unit 313 or the pattern image generation unit 314 via the switch circuit 315! ⁇ ⁇ Modulate this image signal into a test radio signal.
- the transmission circuit 316 outputs the obtained test radio signal to the transmission antenna 317.
- the transmission antenna 317 outputs the test radio signal generated by the transmission circuit 316 to the outside.
- the transmission antenna 317 preferably transmits a test radio signal having a frequency band almost the same as that of the radio signal transmitted by the capsule endoscope 302.
- the control unit 318 is realized using a CPU that executes a processing program, a ROM that stores processing programs and the like, and a RAM that stores calculation parameters or input information to the control unit 398.
- the drive of each component of the inspection apparatus 310 is controlled.
- the control unit 318 performs input / output control of information with respect to each component and controls driving of each component based on instruction information from the input unit 311.
- the control unit 318 controls the imaging operation of the imaging unit 312 and controls the image signal generation operation of the image processing unit 313 based on an imaging start instruction from the input unit 311.
- control unit 318 controls the pattern image generation operation and the image signal generation operation of the pattern image generation unit 314 based on the pattern image generation instruction from the input unit 311. Further, the control unit 318 controls the switching operation of the switch circuit so as to electrically connect the image processing unit 313 and the transmission circuit 316 based on the natural image transmission instruction from the input unit 311, and the image processing unit 313
- the transmission circuit 316 is controlled so as to modulate the image signal generated by the above to a test radio signal and transmit it to the outside.
- control unit 318 controls the switching operation of the switch circuit to electrically connect the pattern image generation unit 314 and the transmission circuit 316 based on the pattern image transmission instruction from the input unit 311, and
- the transmission circuit 316 is controlled so that the image signal generated by the pattern image generation unit 314 is modulated into a test radio signal and transmitted to the outside.
- the power supply unit 319 supplies drive power to each component of the disconnection inspection device 310 when a power switch (not shown) provided in the disconnection inspection device 310 is switched on.
- Examples of the power supply unit 319 include a dry battery, a lithium ion secondary battery, or a nickel hydride battery. Further, the power supply unit 319 may be rechargeable.
- the disconnection inspection device 310 employing such a configuration can transmit a test radio signal including a desired test image as image data. By using the disconnection inspection device 310 that transmits a powerful test radio signal, the disconnection inspection of the plurality of reception antennas 304a to 304f provided in the reception device 303 can be performed.
- FIG. 17 is a flowchart showing an example of the receiving antenna disconnection inspection method according to the ninth embodiment of the present invention.
- the receiving device 303 in which the disconnection inspection of the receiving antenna is performed by the disconnection inspection method according to the ninth embodiment of the present invention sets a battery or the like so that the power supply unit 340 can supply the driving power, and It is confirmed in advance that the diagnostic process is performed normally.
- step S 101 initialization processing by the workstation 306 is performed on the receiving device 303 having the receiving antennas 304a to 304f to be subjected to the disconnection inspection, so that the capsule endoscope for the subject 1
- This receiving device 303 is initially set as a receiving device for performing the mirror inspection (step S 101).
- the antenna unit 304 is removed from the receiving apparatus 303, and the receiving apparatus 303, that is, the apparatus main body 305 is mounted on the cradle 322 with the powerful antenna unit removed.
- Cradle 322 is connected to workstation 306 via cable 32 1.
- the workstation 306 is in a state in which an application for performing initialization processing for the reception device 303 is started in advance, and the reception device 303 is initialized based on this application.
- the apparatus main body 305 that has been subjected to a powerful initialization process is removed from the cradle 322, and the antenna unit 304 is connected to the apparatus main body 305 to form the receiving apparatus 303 (step S102).
- the receiving device 303 is in a state in which the above-described initialization process has been performed, and information related to the subject 1 (patient name, patient, examination date, etc.) is registered, for example.
- the monitor device 309 is connected to the receiving device 303 via the cable 308 (step S103), and the operation of the connected monitor device 309 is confirmed (step S104).
- the control unit 339 of the receiving device 303 is instructed to check the operation of the monitor device 309 by operating the input unit 336.
- the operation check unit 339a described above is connected to the signal processing circuit 3
- the display unit 397 of the monitor device 309 diagnoses whether or not the image data generated by 34 is in a state where it can be displayed on the monitor, and the control unit 339 displays the diagnosis result of the monitor device 309 by the powerful operation confirmation unit 339a. Displayed in Part 337.
- the user can check whether or not the monitor device 309 is in a state where the monitor device 309 can display the image data acquired by the reception device 303.
- the operation confirmation process in step S 104 the operation of the monitor device 309 may be confirmed, and the above-described self-diagnosis process of the reception device 303 may be performed.
- the receiving device 303 connected to the monitoring device 309 that has been confirmed to operate normally (monitor display) in the operation confirmation process in step S104 is inspected for a disconnection of the receiving antenna.
- a reception antenna subject to disconnection inspection is selected from the plurality of reception antennas 304a to 304f connected to the antenna unit 304 of the reception device 303 (step S105), and reception of the selected disconnection inspection subject is received.
- a test radio signal from the disconnection inspection device is transmitted to the antenna (step S106). In this case, for example, as shown in FIG.
- the disconnection inspection device 310 is brought close to the reception antenna 304a selected as the disconnection inspection target, and the test radio signal from the disconnection inspection device 310 is received only by the reception antenna 304a that is the disconnection inspection target. Put it in a state.
- the disconnection inspection device 310 transmits a test radio signal including a desired test image designated in advance by an input operation of the input unit 311 to the reception antenna 304a for a predetermined time.
- the time for transmitting the test radio signal is no disconnection, and is sufficient for the monitor device 309 to display the test image when the receiving device 303 acquires the test image via the receiving antenna. It is a thing.
- the disconnection inspection device 310 may be the natural image and the pattern image described above as the desired test image if the user knows what display content of the test image is transmitted by the test wireless signal. Send me a mistake.
- the test radio signal from the disconnection inspection device 310 transmitted to the reception antenna 304a subject to the disconnection inspection must be disconnected from the reception antenna 304a and the reception device 303.
- the signal is received by the receiving device 303 via the receiving antenna 304a.
- the reception device 303 demodulates the test radio signal received in this way into an image signal, acquires the image data of the test image based on the obtained image signal, and transmits the image data via the cable 308.
- the image data is transmitted to the monitor device 309.
- the monitor device 309 displays the test image P on the display unit 397 based on the image data received from the receiving device 303. Therefore, the user confirms that the test image P is displayed on the display unit 397 of the monitor device 309 in this way (step S107, Yes), and thus the receiving antenna 304a to be inspected for disconnection is disconnected and V ⁇ Can be determined in real time (step S108).
- the test radio signal from the disconnection inspection device 310 transmitted to the reception antenna 304a to be inspected for disconnection is not received by the reception device 303 if the reception antenna 304a and the reception device 303 are disconnected. .
- the receiving device 303 cannot acquire the test image included in the earned test radio signal. Therefore, the monitor device 309 does not display this test image on the display unit 397. Therefore, the user confirms that the test image is not displayed on the display unit 397 of the monitor device 309 in this way (step S 107, No), and thus the reception antenna 304a to be inspected for disconnection is disconnected (disconnected). Status) can be determined in real time (step S109).
- step S110 After that, if disconnection detection has not been completed for all the receiving antennas 304a to 304f of the receiving device 303 (step S110, No), the processing steps after step S105 described above are repeated. In this case, a receiving antenna subject to disconnection inspection is selected from the remaining receiving antennas 304b to 304f excluding the receiving antenna 304a that has been subjected to disconnection inspection, and the processing steps after step S106 described above are performed for the selected receiving antenna. repeat. In this way, when all of the receiving antennas 304a to 304f of the receiving device 303 are completed! /, And the above-described disconnection detection is completed (Yes in step S110), the receiving antennas 304a to 304f are disconnected. The presence or absence can be inspected.
- the reception device 303 having the powerful reception antennas 304a to 304f is connected to the capsule endoscope 302. It can be determined that the wireless signal can be normally received, and then the normal state receiving device 303 is carried by the subject 1 and the capsule endoscope. Inspection can be started immediately.
- the receiving device 303 having the strong receiving antennas 304a to 304f is caused by the disconnection of the receiving antenna. It can be determined that the radio signal from the capsule endoscope 302 is in an abnormal state where the radio signal cannot be normally received. In this case, it is possible to determine that the abnormal state of the powerful receiving device 303 is caused by the disconnection of the receiving antenna, and it is possible to easily identify the receiving antenna in the disconnected state. Accordingly, the receiving device 303 in this abnormal state is replaced by replacing the receiving antenna in a severe disconnection state with a normal receiving antenna without disconnection, or by replacing the antenna unit 304 with a normal one without disconnection. It can be easily restored to the normal state. As a result, the receiving device 303 that has returned to the normal state can be carried by the subject 1 and the capsule endoscopy can be started immediately.
- the test image P included in the test radio signal from the disconnection inspection device 310 is replaced by the display unit of the reception device 303 instead of the monitor device 309. 337 may be displayed.
- the processing steps after step S105 may be performed on the receiving device 303 that has undergone the above-described self-diagnosis processing and the processing steps of steps S101 and S102.
- the disconnection inspection device 310 is brought close to the reception antenna 304a selected as the disconnection inspection target from among the plurality of reception antennas 304a to 304f, and the disconnection inspection device 310 A test radio signal is transmitted to the receiving antenna 304a for a predetermined time.
- the receiving antenna 304a to which the test radio signal is transmitted is disconnected. If the test image P is not displayed on the display unit 337, it can be determined that the receiving antenna 304a to which the test radio signal is transmitted is in a disconnected state. By repeating such disconnection inspection for the remaining reception antennas 304b to 304f, disconnection inspection of all reception antennas 304a to 304f can be achieved.
- a receiving device is used in order to perform a disconnection inspection of the receiving antenna.
- the information related to the subject 1 was registered in the device 303 and initially set, but the present invention is not limited to this, and dummy subject information set for the disconnection inspection, such as dummy patient name and dummy patient ID, is not limited to this.
- the disconnection inspection date may be registered in the receiving device 303 and initialized.
- test image transmitted to the reception device 303 by the disconnection inspection may be stored in the storage unit 335 of the reception device 303, or displayed on the monitor device 309 or the display unit 337 and then by the control unit 339. It may be deleted.
- a receiving device and a portable monitor device are connected via a cable, and image data acquired by this receiving device is stored in this monitor device.
- the test radio signal by the disconnection inspection device is transmitted to the receiving antenna of this receiver for a predetermined time and the test image power included in this test radio signal is not displayed on this monitor device Therefore, the receiving antenna to which this test radio signal is transmitted is judged to be in a disconnected state. For this reason, even if the receiving device is not connected to a workstation that displays an image picked up by the capsule endoscope, the receiving device is in a normal state in which the wireless signal from the capsule endoscope can be normally received.
- the abnormal state of the receiving apparatus is caused by the disconnection of the receiving antenna.
- the receiving device can be connected to the capsule type. It is possible to easily check whether or not the radio power of the endoscope power can be received normally, and if it is determined to be abnormal, it is easy to check the disconnection state of the receiving antenna that caused the abnormal condition of the receiver. The effect is that it can be detected.
- a disconnected receiving antenna can be easily detected and identified from among a plurality of receiving antennas of the receiving device, it is possible to easily replace this disconnected receiving antenna with a normal receiving antenna. In addition, it is possible to easily return the receiving device that is determined to be in an abnormal state due to the disconnection of the receiving antenna to a normal state.
- a test radio signal is transmitted to each reception antenna of the reception device having the display unit for a predetermined time.
- transmitting it is possible to determine whether or not the receiving device is in a normal state without connecting the monitoring device described above to the receiving device, and if it is determined that the receiving device is in an abnormal state, It is possible to determine that the abnormal state of the receiving device is due to the disconnection of the receiving antenna, and it is possible to easily detect and identify the disconnecting receiving antenna from among a plurality of receiving antennas.
- Embodiments 1 to 9 described in the specification of the present application can be implemented in combination with each other.
- the disconnection detection device 310 and the receiving device 2 or the receiving device 102 described above may be used to detect the disconnection of the receiving antenna, or the receiving device 2 or the receiving device 102 and the monitoring device 309 may be connected.
- the reception device 2 or the reception device 102 may process the reception antenna disconnection detection result displayed on the monitor device 309.
- the control unit 339 of the receiving device 303 described above has a disconnection detection processing unit corresponding to the disconnection detection processing unit C2a, and the control unit 339 having a powerful disconnection detection processing unit is the fourth embodiment of the present invention.
- the disconnection detection of the receiving antenna may be performed in substantially the same manner as ⁇ 8.
- the antenna unit 304 of the receiving device 303 described above has a disconnection detection circuit corresponding to the disconnection detection circuit 23, and a switching switch for switching the connection state between the disconnection detection circuit and the reception antennas 304a to 304f (corresponding to the switching switch 22).
- the disconnection detection circuit may detect the disconnection of the receiving antenna.
- the switching control circuit 333 further controls the connection state between the disconnection detection circuit by the switching switch and the receiving antennas 304a to 304f, and the control unit 339 generates a detection signal S6 based on the strength of the disconnection detection circuit. Detect the disconnection of the receiving antenna! Industrial applicability
- the receiving apparatus receives a radio signal including image data captured by a capsule endoscope introduced into an organ of a subject from the capsule endoscope in the subject.
- a receiving antenna and a receiving device for receiving a radio signal from a capsule endoscope in a strong subject specifically, the receiving device and the receiving antenna are connected to each other.
- This is suitable for a receiving apparatus that can easily and quickly detect the disconnection of the connected feeder line.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2006800331968A CN101262810B (zh) | 2005-09-09 | 2006-08-29 | 接收装置 |
AU2006288410A AU2006288410B2 (en) | 2005-09-09 | 2006-08-29 | Receiver apparatus |
US11/571,418 US8175559B2 (en) | 2005-09-09 | 2006-08-29 | Receiving apparatus |
EP06796984A EP1922980A4 (en) | 2005-09-09 | 2006-08-29 | RECEIVER DEVICE |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005-262045 | 2005-09-09 | ||
JP2005262045A JP2007068895A (ja) | 2005-09-09 | 2005-09-09 | 断線検査方法 |
JP2005-306116 | 2005-10-20 | ||
JP2005306116A JP4827486B2 (ja) | 2005-10-20 | 2005-10-20 | 無線型被検体内情報取得システム |
JP2005-311663 | 2005-10-26 | ||
JP2005311663A JP4751696B2 (ja) | 2005-10-26 | 2005-10-26 | 受信装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007029570A1 true WO2007029570A1 (ja) | 2007-03-15 |
Family
ID=37835691
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/317007 WO2007029570A1 (ja) | 2005-09-09 | 2006-08-29 | 受信装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US8175559B2 (ja) |
EP (1) | EP1922980A4 (ja) |
AU (1) | AU2006288410B2 (ja) |
WO (1) | WO2007029570A1 (ja) |
Cited By (1)
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---|---|---|---|---|
JP5143313B2 (ja) * | 2010-11-29 | 2013-02-13 | オリンパスメディカルシステムズ株式会社 | 受信装置およびカプセル型内視鏡システム |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
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EP1790278B1 (en) * | 2004-09-07 | 2011-05-04 | Olympus Corporation | Reception device using an antenna unit |
JP4282680B2 (ja) * | 2006-03-29 | 2009-06-24 | 株式会社東芝 | 無線装置 |
KR100968970B1 (ko) * | 2007-12-29 | 2010-07-14 | 삼성전기주식회사 | 안테나 다이버시티 수신기 |
CN102176856B (zh) * | 2008-10-14 | 2013-11-06 | 奥林巴斯医疗株式会社 | 医疗系统 |
US8693957B2 (en) * | 2011-05-05 | 2014-04-08 | Mediatek Inc. | Signal transceiving module |
WO2012165349A1 (ja) | 2011-06-02 | 2012-12-06 | オリンパスメディカルシステムズ株式会社 | 受信装置およびカプセル型内視鏡システム |
IN2015DN00570A (ja) | 2013-09-19 | 2015-06-26 | Komatsu Mfg Co Ltd | |
JP2016087248A (ja) * | 2014-11-07 | 2016-05-23 | ソニー株式会社 | 観察装置及び観察システム |
DE112017005227T5 (de) | 2016-10-14 | 2019-07-11 | Olympus Corporation | Empfangsantenne, Empfangsantenneneinheit, Empfangssystem und Empfangseinrichtung |
WO2018105221A1 (ja) | 2016-12-07 | 2018-06-14 | オリンパス株式会社 | 内視鏡システム、受信装置、ワークステーション、設定方法およびプログラム |
WO2020202531A1 (ja) * | 2019-04-04 | 2020-10-08 | オリンパス株式会社 | 受信システム |
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- 2006-08-29 AU AU2006288410A patent/AU2006288410B2/en not_active Ceased
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- 2006-08-29 WO PCT/JP2006/317007 patent/WO2007029570A1/ja active Application Filing
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Also Published As
Publication number | Publication date |
---|---|
EP1922980A4 (en) | 2013-01-30 |
EP1922980A1 (en) | 2008-05-21 |
US8175559B2 (en) | 2012-05-08 |
AU2006288410B2 (en) | 2009-09-10 |
AU2006288410A1 (en) | 2007-03-15 |
US20080318540A1 (en) | 2008-12-25 |
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