JP2005080842A - Internal guide device for specimen and wireless type internal information acquisition system for specimen - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable efficient and sure taking of the images as desired restricting the power consumption after the device is guided into the specimen while restricting the useless radio wave radiation. <P>SOLUTION: A timer circuit 35 which counts the prescribed time after the closure of a power source switch 34a provided within a drive control part 34 and an RF switch 23a to start an RF transmission unit after the counting of the prescribed time with the timer circuit 35. The RF transmission unit 23 with a higher power consumption is started when the given time passes after the closure of the power source to restrict the consumption of the battery unit 30 and the useless radio wave radiation. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention is used in a state of being introduced into a subject, and performs an in-subject introduction device that performs a predetermined function inside the subject, and wireless in-subject information acquisition using the in-subject introduction device It is about the system.

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

  While moving inside the body cavity, image data imaged inside the body by the capsule endoscope is sequentially transmitted to the outside by wireless communication and stored in a memory provided in an external receiver. When the patient carries the receiver having the wireless communication function and the memory function, the patient can freely act even during the period from swallowing the capsule endoscope until it is discharged. Thereafter, the doctor or nurse can make a diagnosis by displaying an organ image on the display based on the image data stored in the memory.

  Such a capsule endoscope may have a configuration in which driving power is obtained from a built-in power supply source. However, in recent years, a configuration in which driving power is supplied from the outside to the capsule endoscope via wireless transmission has attracted attention. ing. Thus, by adopting a configuration in which electric power is supplied from the outside, it is possible to avoid that the capsule endoscope is unintentionally consumed and stops driving while moving inside the body cavity. Is possible.

  In addition, in order to control the driving of the capsule endoscope, a reed switch that is turned on / off by an external magnetic field is provided inside the capsule endoscope, and a permanent magnetic field supply is provided in a package that houses the capsule endoscope. A configuration with a magnet has been proposed. That is, the reed switch provided in the capsule endoscope has a structure in which the reed switch is kept off in an environment where an external magnetic field of a certain strength or higher is applied and is turned on when the strength of the external magnetic field is reduced. For this reason, while the capsule endoscope is not driven in the state of being accommodated in the package, the capsule endoscope is removed from the influence of the permanent magnet by being taken out of the package and starts to be driven. With such a configuration, it is possible to prevent the capsule endoscope from starting driving while being accommodated in the package (see, for example, Patent Document 1).

International Publication No. 01/35813 Pamphlet

  However, even when the mechanism for controlling the driving state of the capsule endoscope is provided as described above, there is a problem that the driving of the capsule endoscope outside the subject cannot always be prevented. That is, since it takes a certain amount of time to take out the capsule endoscope from the package and introduce it into the subject, the capsule endoscope starts to be driven before being introduced into the subject. There is a problem. Hereinafter, a problem that occurs when the capsule endoscope starts driving before being introduced into the subject will be described.

  First, since the capsule endoscope starts to be driven before being introduced into the subject, there is a problem in that useless image data that is not used for diagnosis or the like is acquired. The capsule endoscope is configured to start driving and start an imaging operation, and to start wireless transmission of the obtained image data.When the capsule endoscope is driven before being introduced into the subject, An imaging operation or the like is performed outside the subject.

  As a result, a lot of image data is acquired from when the capsule is opened until it is introduced into the subject, and doctors need to delete such useless image data and perform diagnosis and the like. Occurs. The imaging rate of the capsule endoscope is configured to capture, for example, about 2 images per second. Therefore, even if it is a short time of about several tens of seconds, the capsule endoscope is outside the subject. By driving, a large amount of unnecessary image data is acquired. Therefore, in order to avoid such useless acquisition of image data, it is necessary to prevent the capsule endoscope from starting driving before being introduced into the subject.

  In addition, since a certain amount of driving power is required to acquire such unnecessary image data, the capsule endoscope is driven outside the subject and accumulated inside the capsule endoscope. Electric power is wasted. Therefore, from the viewpoint of power consumption, it is necessary to prevent the capsule endoscope from starting before being introduced into the subject.

  Note that it is necessary to confirm the operation of the capsule endoscope before oral administration. In this case, it is desired to suppress the necessary minimum power consumption and unnecessary radio wave radiation.

  The present invention has been made in view of the above, and is capable of efficiently and reliably capturing a desired captured image while suppressing power consumption after being introduced into a subject, and suppressing unnecessary radio wave radiation. An object is to provide an in-subject introduction apparatus and a wireless in-subject information acquisition system.

  In order to solve the above-described problems and achieve the object, an in-subject introduction apparatus according to claim 1 is used in a state of being introduced into a subject, and performs a predetermined function inside the subject. Intra-sample introduction device, function execution means for executing the predetermined function, a timer for measuring a predetermined time after the power switch of the intra-subject introduction device is turned on, and the timer measuring the predetermined time Drive control means for controlling the drive of the function execution means.

  In the in-subject introduction apparatus according to claim 2, the function execution unit is a radio transmission unit, and the radio transmission unit includes a radio activation switch that switches activation of the radio transmission unit, and the drive control The means is characterized in that the wireless activation switch is turned on when the timer counts the predetermined time.

  According to a third aspect of the present invention, there is provided the in-subject introduction apparatus according to the above invention, wherein the function execution means is a wireless transmission means, and the wireless transmission means includes a low power consumption state and normal power consumption of the wireless transmission means. A wireless power supply changing means for switching the state, and the drive control means gives a change instruction to the wireless power supply changing means when the timer times the predetermined time to change the normal power consumption from the low power consumption state. It is characterized by switching to a power state.

  According to a fourth aspect of the present invention, in the in-subject introduction apparatus according to the above invention, the function execution unit is an imaging circuit, and the drive control unit performs control to drive at least the imaging circuit after the power switch is turned on. It is characterized by performing.

  According to a fifth aspect of the present invention, in the in-subject introduction device according to the above invention, the timer is provided in an imaging circuit.

  According to a sixth aspect of the present invention, in the in-vivo introduction device according to the above invention, the first imaging process with a predetermined frame rate and the second imaging process with a frame rate different from the first imaging process are changed. A frame rate changing unit that performs an instruction to cause the frame rate changing unit to perform imaging at a frame rate according to the first imaging process after turning on the power switch; and the timer When the predetermined time is counted, an instruction to perform imaging at a frame rate by the second imaging process is given.

  According to a seventh aspect of the present invention, there is provided a wireless intra-subject information acquisition system including an intra-subject introduction device that is introduced into a subject, and information obtained by the intra-subject introduction device that is disposed outside the subject. A wireless intra-subject information acquisition system including a receiving device that acquires via wireless communication, wherein the intra-subject introduction device performs a predetermined function based on supplied drive power A wireless means for receiving the supplied drive power and wirelessly transmitting the information obtained by the function executing means, a timer for measuring a predetermined time after turning on the power switch of the intra-subject introduction apparatus, and the timer Drive control means for controlling the drive of the function execution means when the predetermined time is measured, and the receiving device receives and receives information transmitted from the wireless means, And processing means for analyzing the information, characterized by comprising a.

  The wireless in-vivo information acquiring system according to claim 8 is the above-described invention, wherein the function executing unit includes an imaging unit that acquires image data inside the subject, and image data acquired by the imaging unit. Wireless transmission means for wirelessly transmitting to the outside, wherein the drive control means turns on a wireless switch that switches activation of the wireless transmission means when the timer times the predetermined time. To do.

  In the intra-subject introduction apparatus according to the present invention, after the power switch is turned on, the drive operation of the function execution means, particularly the wireless transmission means, is activated after a predetermined time has elapsed by the timer. In this way, it is possible to efficiently and surely capture a desired captured image while suppressing unnecessary radio wave radiation.

  A wireless in-vivo information acquiring system that is the best mode for carrying out the present invention will be described below.

(Embodiment 1)
First, the wireless in-vivo information acquiring system according to the first embodiment will be described. The wireless in-vivo information acquiring system according to the first embodiment will be described by taking a capsule endoscope as an example of the intra-subject introducing device.

  FIG. 1 is a schematic diagram showing an overall configuration of a wireless in-vivo information acquiring system according to the first embodiment. As shown in FIG. 1, the wireless in-vivo information acquisition system includes a transmission / reception device 2 having a wireless transmission / reception function, and driving power obtained from a wireless signal introduced into the body of the subject 1 and transmitted from the transmission / reception device 2. And a capsule endoscope (intra-subject introduction device) 3 that takes an image of a body cavity and transmits data to the transmission / reception device 2. In addition, the wireless in-vivo information acquiring system is configured to display data in the body cavity based on data received by the transmission / reception device 2 and to exchange data between the transmission / reception device 2 and the display device 4. A portable recording medium 5. The transmission / reception device 2 includes a transmission / reception jacket 2a worn by the subject 1 and an external device 2b that performs processing of radio signals transmitted / received via the transmission / reception jacket 2a.

  The display device 4 is for displaying an in-vivo image captured by the capsule endoscope 3, and has a configuration such as a workstation that displays an image based on data obtained by the portable recording medium 5. Have Specifically, the display device 4 may be configured to directly display an image by a CRT display, a liquid crystal display, or the like, or may be configured to output an image to another medium such as a printer.

  The portable recording medium 5 can be attached to and detached from the external device 2b and the display device 4, and has a structure capable of outputting or recording information when being inserted into both. Specifically, the portable recording medium 5 is inserted into the external device 2 b and transmitted from the capsule endoscope 3 while the capsule endoscope 3 is moving in the body cavity of the subject 1. Record the data. Then, after the capsule endoscope 3 is ejected from the subject 1, that is, after imaging of the inside of the subject 1 is finished, the capsule endoscope 3 is taken out from the external device 2b and inserted into the display device 4 to be attached to the display device. The data recorded by 4 is read out. When data is transferred between the external device 2b and the display device 4 by a portable recording medium 5 such as a compact flash (registered trademark) memory, and the external device 2b and the display device 4 are connected by wire. Unlike the above, the subject 1 can freely move during imaging in the body cavity.

  The transmission / reception device 2 has a function as a power feeding device that transmits power to the capsule endoscope 3 and also functions as a reception device that receives in-vivo image data wirelessly transmitted from the capsule endoscope 3. Also have. FIG. 2 is a block diagram schematically showing the configuration of the transmission / reception device 2. As shown in FIG. 2, the transmission / reception apparatus 2 has a shape that can be worn by the subject 1, and includes a transmission / reception jacket 2a including reception antennas A1 to An and feeding antennas B1 to Bm, and radio signals transmitted and received. And an external device 2b for performing the above processing.

  The external device 2b has a function of processing a radio signal transmitted from the capsule endoscope 3. Specifically, as shown in FIG. 2, the external device 2b performs predetermined processing such as demodulation on the radio signals received by the receiving antennas A1 to An, and the capsule-type endoscope from the radio signals. An RF receiving unit 11 that extracts and outputs image data acquired by the mirror 3, an image processing unit 12 that performs processing necessary for the output image data, and image data that has undergone image processing is recorded. And a storage unit 13. Note that image data is recorded on the portable recording medium 5 via the storage unit 13.

  The external device 2b has a function of generating a radio signal to be transmitted to the capsule endoscope 3. Specifically, the external device 2 b includes an oscillator 14 that generates a power feeding signal and defines an oscillation frequency, and a control information input unit that generates a control information signal for controlling the driving state of the capsule endoscope 3. 15, a superimposing circuit 16 that combines the power feeding signal and the control information signal, and an amplifier circuit 17 that amplifies the intensity of the combined signal. The signal amplified by the amplifier circuit 17 is sent to the power feeding antennas B <b> 1 to Bm and is sent to the capsule endoscope 3. The external device 2b includes a power supply unit 18 including a predetermined power storage device or an AC power adapter, and the constituent elements of the external device 2b use the power supplied from the power supply unit 18 as driving energy.

  Next, the capsule endoscope 3 will be described. FIG. 3 is a block diagram schematically showing the configuration of the capsule endoscope 3. As shown in FIG. 3, the capsule endoscope 3 includes an LED 19 as an illuminating unit for irradiating an imaging region when imaging the inside of the subject 1, and an LED driving circuit 20 that controls the driving state of the LED 19. And a CCD 21 as an image pickup means for picking up a reflected light image from a region irradiated by the LED 19, and a signal processing circuit 22 for processing an image signal output from the CCD 21 into image information of a desired format. The capsule endoscope 3 includes a CCD drive circuit 26 that controls the drive state of the CCD 21, an RF transmission unit 23 that is imaged by the CCD 21, modulates image data by the signal processing circuit 22, and generates an RF signal; A transmission antenna unit 24 as a wireless transmission unit that wirelessly transmits an RF signal output from the RF transmission unit 23, and a system control circuit 32 that controls the operation of the LED drive circuit 20, the CCD drive circuit 26, and the RF transmission unit 23. Prepare. The CCD 21, the signal processing circuit 22, and the CCD driving circuit 26 are collectively referred to as an imaging circuit 40.

  By providing these mechanisms, the capsule endoscope 3 acquires image information of the region to be examined illuminated by the LED 19 by the CCD 21 while being introduced into the subject 1. The acquired image information is subjected to signal processing by the signal processing circuit 22, converted into an RF signal by the RF transmission unit 23, and then transmitted to the outside via the transmission antenna unit 24.

  The capsule endoscope 3 includes a receiving antenna unit 25 that receives a radio signal transmitted from the transmission / reception device 2 and a separation circuit 27 that separates a power feeding signal from a signal received by the receiving antenna unit 25. . Furthermore, the capsule endoscope 3 includes a power regeneration circuit 28 that regenerates power from the separated power supply signal, a booster circuit 29 that boosts the regenerated power, and a capacitor 30 that stores the boosted power. Prepare. Further, the capsule endoscope 3 detects the content of the control information signal from the component separated from the power feeding signal by the separation circuit 27, and if necessary, the LED drive circuit 20, the CCD drive circuit 22, and the system control circuit 32. Is provided with a control information detection circuit 31 for outputting a control signal. The control information detection circuit 31 and the system control circuit 32 also have a function of distributing drive power supplied from the battery 30 to other components.

  Furthermore, the capsule endoscope 3 includes a sensor unit 33 that detects a predetermined signal such as magnetism, light, and radio waves, and a system control circuit 32, an RF transmission unit 23, based on a value detected by the sensor unit 33, A drive control unit (drive control means) 34 that controls the drive state of various function execution means such as the imaging circuit 40 is provided. The drive control unit 34 includes a power switch 34 a that is a main switch for the power supply of the entire capsule endoscope 3. As described above, the sensor unit 33 detects magnetism, light, radio waves, and the like, which are signals for turning the power switch 34 a on and off, and outputs the detection result to the drive control unit 34. The RF transmission unit 23 includes an RF switch 23 a that is a power switch for the entire RF transmission unit 23. The timer circuit 35 is provided between the drive control unit 34 and the RF switch 23a, starts measuring a predetermined time in response to an instruction from the drive control unit 34, and turns on the RF switch 23a at the same time as the RF transmission. The unit 23 is activated.

  By providing these mechanisms, the capsule endoscope 3 first receives a radio signal transmitted from the transmission / reception device 2 at the reception antenna unit 25, and then receives a power feeding signal and a control information signal from the received radio signal. To separate. The control information signal is output to the LED drive circuit 20, the CCD drive circuit 22 and the system control circuit 32 through the control information detection circuit 31, and is used for controlling the drive state of the LED 19, the CCD 21 and the RF transmission unit 23. On the other hand, the power feeding signal is regenerated as power by the power regeneration circuit 28, and the regenerated power is boosted to the potential of the capacitor 30 by the booster circuit 29 and then stored in the capacitor 30. The battery 30 has a configuration capable of supplying power to the system control circuit 32 and other components. Thus, the capsule endoscope 3 has a configuration in which power is supplied by wireless transmission from the transmission / reception device 2.

  Here, with reference to FIG. 4, the drive control procedure centering on the power supply management by the drive control part 34 is demonstrated. Note that at the start of this process, each component inside the capsule endoscope 3 is in an OFF state. However, it is assumed that the sensor unit 33 does not require a power source, and detects, for example, mechanical movement to turn on / off the power switch 34a.

  First, when the power switch 34a is activated (step S101), the timer circuit 35 is activated to start measuring a predetermined time (step S102). Thereafter, the drive control unit 34 activates the imaging circuit 40 via the system control circuit 32 (step S103). In this case, since the RF transmission unit 23 is not activated, what is imaged by the imaging circuit 40 is not transmitted to the outside.

  Thereafter, it is determined whether or not the time counted by the timer circuit 35 has become a predetermined time or more (step S104). If the time has exceeded the predetermined time (step S104, YES), the RF switch 23a of the RF transmission unit 23 is determined. Is turned on and the RF transmission unit 23 is activated (step S105). On the other hand, if it is not longer than the predetermined time (step S104, NO), the determination is repeated until the predetermined time is exceeded. Here, for example, when imaging the state of the small intestine, the predetermined time may be 3 hours in consideration of the staying time of the stomach. This is because the capsule endoscope 3 surely reaches the small intestine 3 hours after the oral administration after the power is turned on.

  After the RF transmission unit is activated (step S105), the image data imaged by the imaging circuit 40 is transmitted to the external device 2b via the RF transmission unit 23 and the transmission antenna unit 24 (step S106), and this process ends. To do. The transmitted image data is received by a receiving mechanism provided in the transmission / reception jacket 2a, and then supplied to the display device 4 via the portable recording medium 5, and displayed as an in-subject image on the screen of the display device 4. The

  In the first embodiment, the timer circuit 35 is used to turn on the RF transmission unit 23 having the largest power consumption after a predetermined time since the power switch 34a is turned on, so that efficient power consumption is performed. In addition, the battery life can be extended, unnecessary radio wave radiation can be eliminated, and an imaging target can be obtained reliably.

  Note that the timer circuit 35 may be provided at any location in the capsule endoscope 3. For example, a timer corresponding to the timer circuit 35 may be provided in the CCD driving circuit 26 using the clock in the CCD driving circuit 26.

  Alternatively, the sensor unit 33 may not be provided, and the power switch 34a may be turned on by a human operation.

  In the first embodiment described above, the imaging circuit 40 is activated after the power switch 34a is turned on. However, the present invention is not limited to this, and other circuits may be activated. This is because in the first embodiment, the RF transmission unit 23 may be activated after a predetermined time as an example of a circuit with high power consumption.

(Embodiment 2)
Next, a second embodiment of the present invention will be described. In the first embodiment described above, the RF transmission unit 23 is in the off state until a predetermined time has elapsed after the power switch 34a is turned on. In the second embodiment, the power switch 34a is turned on. At this point, it is designed to be in a low power consumption operating state that can output weak radio waves.

  FIG. 5 is a block diagram showing a configuration of a capsule endoscope according to the second embodiment of the present invention. As shown in FIG. 5, the RF transmission unit 23 includes an RF power supply switching change unit 23 b that switches between a low power consumption state and a normal power consumption state, and corresponds to the timer circuit 35 instead of the timer circuit 35. A timer 22 a is provided in the CCD drive circuit 22. Other configurations are the same as those of the first embodiment, and the same reference numerals are given to the same components.

  The RF power supply changing unit 23b reduces the power supply voltage consumed by the RF transmission unit 23 to a low power consumption state until receiving a time-out instruction from the timer 22a, and after receiving the time-out instruction from the timer 22a, the power supply voltage is changed. Normal voltage is used so that image data can be transmitted with normal transmission power. Here, the normal transmission power refers to power at which the external apparatus 2b can reliably receive image data in a state where the capsule endoscope 3 is present in the subject 1. Further, the low power consumption state refers to a state in which the minimum transmission power that can receive image data can be output in the vicinity of the capsule endoscope 3.

  Note that the RF power supply changing unit 23b changes the power supply voltage to switch between the low power consumption state and the normal power consumption state. However, the present invention is not limited to this, and the current value of the power supply can be changed to be low. The power consumption state and the normal power consumption state may be switched and changed.

  Here, with reference to FIG. 6, the drive control procedure centering on the power management by the drive control part 34 of Embodiment 2 is demonstrated. Note that at the start of this process, each component inside the capsule endoscope 3 is in an OFF state. However, it is assumed that the sensor unit 33 does not require a power source, and detects, for example, mechanical movement to turn on / off the power switch 34a.

  First, when the power switch 34a is activated (step S201), the drive control unit 34 activates the imaging circuit 40 via the system control circuit 32 (step S202), and then the timer 22a in the CCD drive circuit 22 is activated. It starts up and starts measuring time for a predetermined time (step S203). Further, the RF transmission unit 23 is activated in a low power consumption state (step S204).

  Thereafter, it is determined whether or not the time counted by the timer 22a is equal to or longer than a predetermined time (step S205). When the time is equal to or longer than the predetermined time (step S205, YES), the RF power supply changing unit 23b is normally A switching instruction to enter the power consumption state is performed (step S206), and the RF transmission unit 23 is changed to the normal power consumption state. On the other hand, when it is not longer than the predetermined time (step S205, NO), the determination is repeated until the predetermined time is exceeded. After the RF transmission unit 23 is changed to the normal power consumption state (step S206), the image data captured by the imaging circuit 40 is transmitted to the external device 2b via the RF transmission unit 23 and the transmission antenna unit 24 (step S206). S207), the process is terminated.

  In the second embodiment, image data can be transmitted in a low power consumption state at the same time as the power is turned on. Therefore, before the capsule endoscope 3 is orally administered, the capsule can be transmitted with only a minimum amount of radio wave radiation. The operation of the endoscope 3 can be checked, and after a predetermined time, it is changed to a normal power consumption state, so that efficient power consumption can be performed, battery life can be extended, and imaging can be performed. The target can be obtained reliably.

(Embodiment 3)
In the first and second embodiments described above, the circuits other than the RF transmission unit are activated at the same time as the power switch 34a is turned on. In the third embodiment, after the power switch 34a is turned on, the circuit is predetermined. All circuits are activated when time elapses.

  FIG. 7 is a block diagram showing a configuration of a capsule endoscope according to the third embodiment of the present invention. As shown in FIG. 7, a timer 34 b that counts a predetermined time after activation of the power switch 34 a is provided in the drive control unit 34. That is, the timer circuit 35 shown in the first embodiment measures a predetermined time for the activation of the RF transmission unit 23, but this timer 34 b is used for the entire circuit in the capsule endoscope 3. It measures the predetermined time. Other configurations are the same as those of the first embodiment, and the same reference numerals are given to the same components.

    Here, with reference to FIG. 8, the drive control procedure centering on the power management by the drive control part 34 of Embodiment 3 is demonstrated. Note that at the start of this process, each component inside the capsule endoscope 3 is in an OFF state. However, it is assumed that the sensor unit 33 does not require a power source, and detects, for example, mechanical movement to turn on / off the power switch 34a.

  First, when the power switch 34a is activated (step S301), the drive control unit 34 activates the timer 22a and starts measuring a predetermined time (step S302). Thereafter, it is determined whether or not the time counted by the timer 22a has reached a predetermined time or more (step S303). If the time has exceeded the predetermined time (step S303, YES), the imaging circuit 40 is activated (step S304). Further, the RF transmission unit 23 is activated (step S305), and the image data captured by the imaging circuit 40 is transmitted to the external device 2b via the RF transmission unit 23 and the transmission antenna unit 24 (step S306). The process ends. Note that the imaging circuit 40 and the RF transmission unit 23 are activated after a predetermined time has elapsed, but this is an example, and all of the capsule endoscope 3 is activated. Of course, only the minimum necessary circuit may be activated.

  In the third embodiment, since all the circuits in the capsule endoscope 3 are started after the power is turned on and a predetermined time has elapsed, efficient power consumption is realized and battery life is reduced. In addition to being able to extend, unnecessary radio wave radiation can be eliminated and an imaging target can be reliably obtained.

(Embodiment 4)
Next, a fourth embodiment of the present invention will be described. In the second embodiment described above, the RF transmission unit 23 is maintained in the low power consumption state until a predetermined time elapses after the power is turned on, and is changed to the normal power consumption state after the predetermined time elapses. In the fourth embodiment, the imaging frame rate by the imaging circuit 40 is further changed.

  FIG. 9 is a block diagram showing a configuration of a capsule endoscope according to the fourth embodiment of the present invention. As shown in FIG. 9, the system control circuit 32 sets the imaging frame rate by the imaging circuit 40 to a lower imaging frame rate than usual until there is an instruction from the power switch 34a, and there is an instruction from the power switch 34a. In addition, a rate changing unit 32a that changes the imaging frame rate of the imaging circuit 40 to the normal frame rate is provided. Other configurations are the same as those of the second embodiment, and the same components are denoted by the same reference numerals.

  Here, with reference to FIG. 10, the drive control procedure centering on the power management by the drive control part 34 of Embodiment 4 is demonstrated. Note that at the start of this process, each component inside the capsule endoscope 3 is in an OFF state. However, it is assumed that the sensor unit 33 does not require a power source, and detects, for example, mechanical movement to turn on / off the power switch 34a.

  First, when the power switch 34a is activated (step S401), the drive control unit 34 activates the imaging circuit 40 via the system control circuit 32 (step S402), and the rate changing unit 32a performs imaging frames by the imaging circuit 40. Set the rate to a lower imaging frame rate than normal. Thereafter, the timer 22a in the CCD drive circuit 22 is activated to start measuring a predetermined time (step S403). Further, the RF transmission unit 23 is activated in a low power consumption state (step S404).

  Thereafter, it is determined whether or not the time counted by the timer 22a is equal to or longer than a predetermined time (step S405). When the time is equal to or longer than the predetermined time (step S405, YES), the imaging circuit 40 is detected by the rate changing unit 32a. Is changed to a normal imaging frame rate (step S406), and a switching instruction to enter a normal power consumption state is issued to the RF power supply changing unit 23b (step S407), and the RF transmission unit 23 is set to normal. Change to the power consumption state. On the other hand, if it is not longer than the predetermined time (step S405, NO), the determination is repeated until the predetermined time is exceeded. After the imaging circuit 40 is changed to the normal imaging frame rate and the RF transmission unit 23 is changed to the normal power consumption state, image data captured by the imaging circuit 40 is transmitted via the RF transmission unit 23 and the transmission antenna unit 24. Is transmitted to the external device 2b (step S408), and this process ends.

  In the fourth embodiment, image data can be transmitted at a lower imaging frame rate than usual and in a low power consumption state at the same time as the power is turned on. Therefore, before the capsule endoscope 3 is orally administered, the minimum amount is required. The operation of the capsule endoscope 3 can be checked only by the radiation of the radio wave, and after a predetermined time, the normal imaging frame rate and the normal power consumption state are changed, so that efficient power consumption is performed. Thus, the battery life can be extended and the imaging target can be obtained with certainty.

It is a schematic diagram which shows the whole structure of the radio | wireless type in-vivo information acquisition system concerning Embodiment 1 of this invention. It is a block diagram which shows typically the structure of the transmission / reception apparatus which comprises the radio | wireless type in-vivo information acquisition system shown in FIG. It is a block diagram which shows typically the structure of the capsule endoscope which comprises the radio | wireless type in-vivo information acquisition system shown in FIG. 4 is a flowchart showing an operation processing procedure mainly for power management in the capsule endoscope shown in FIG. 3. It is a block diagram which shows the structure of the capsule type endoscope concerning Embodiment 2 of this invention. 6 is a flowchart showing an operation processing procedure mainly for power management in the capsule endoscope shown in FIG. 5. It is a block diagram which shows the structure of the capsule endoscope concerning Embodiment 3 of this invention. FIG. 8 is a flowchart showing an operation processing procedure mainly for power management in the capsule endoscope shown in FIG. 7. FIG. It is a block diagram which shows the structure of the capsule endoscope concerning Embodiment 4 of this invention. 10 is a flowchart showing an operation processing procedure mainly for power management in the capsule endoscope shown in FIG. 9.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Subject 2 Transmission / reception apparatus 2a Transmission / reception jacket 2b External apparatus 3 Capsule endoscope 4 Display apparatus 5 Portable recording medium 6 Coil for power supply 11 RF receiving unit 12 Image processing unit 13 Storage unit 14 Oscillator 15 Control information input unit 16 Superimposing circuit 17 Amplifying circuit 18 Power supply unit 19 LED
20 LED drive circuit 21 CCD
22 signal processing circuit 22a, 34b timer 23 RF transmission unit 23a RF switch 23b RF power supply changing unit 24 transmitting antenna unit 25 receiving antenna unit 26 CCD drive circuit 27 separation circuit 28 power regeneration circuit 29 booster circuit 30 capacitor 31 control information detection circuit 32 System control circuit 32a Rate changing unit 33 Sensor unit 34 Drive control unit 34a Power switch 35 Timer circuit 40 Imaging circuit A1 to An Receiving antenna B1 to Bm Feeding antenna

Claims (8)

An in-subject introduction apparatus that is used in a state of being introduced into a subject and performs a predetermined function inside the subject,
Function execution means for executing the predetermined function;
A timer for measuring a predetermined time after turning on the power switch of the intra-subject introduction apparatus;
Drive control means for controlling the drive of the function execution means when the timer times the predetermined time;
An intra-subject introduction apparatus characterized by comprising: The function execution means is wireless transmission means,
The wireless transmission means includes a wireless activation switch that switches activation of the wireless transmission means,
The in-subject introduction apparatus according to claim 1, wherein the drive control unit turns on the wireless activation switch when the timer measures the predetermined time. The function execution means is wireless transmission means,
The wireless transmission unit includes a wireless power supply changing unit that switches between a low power consumption state and a normal power consumption state of the wireless transmission unit,
2. The drive control means, when the timer measures the predetermined time, gives a change instruction to the wireless power supply changing means to switch from the low power consumption state to the normal power consumption state. 2. An intra-subject introduction apparatus according to 1. The function execution means is an imaging circuit,
The in-subject introduction apparatus according to claim 1, wherein the drive control unit performs control to drive at least the imaging circuit after the power switch is turned on.   The in-subject introduction apparatus according to claim 1, wherein the timer is provided in an imaging circuit. Frame rate changing means for changing the first imaging process at a predetermined frame rate and the second imaging process at a frame rate different from the first imaging process;
The drive control means instructs the frame rate changing means to perform imaging at the frame rate by the first imaging process after turning on the power switch, and when the timer times the predetermined time The in-subject introduction apparatus according to claim 1, wherein an instruction to perform imaging at a frame rate by the second imaging process is performed. A wireless subject including an intra-subject introduction device introduced into the subject and a receiving device that is disposed outside the subject and obtains information obtained by the intra-subject introduction device via wireless communication An internal information acquisition system,
The in-subject introduction device comprises:
Function execution means for executing a predetermined function based on the supplied drive power;
Wireless means for receiving the supplied drive power and wirelessly transmitting the information obtained by the function execution means;
A timer for measuring a predetermined time after turning on the power switch of the intra-subject introduction apparatus;
Drive control means for controlling the drive of the function execution means when the timer times the predetermined time,
The receiving device is:
Wireless receiving means for receiving information transmitted from the wireless means;
Processing means for analyzing the received information;
A wireless in-vivo information acquiring system comprising: The function execution means includes
Imaging means for acquiring image data inside the subject;
Wireless transmission means for wirelessly transmitting image data acquired by the imaging means to the outside;
With
8. The wireless in-vivo information acquisition according to claim 7, wherein the drive control means turns on a wireless switch that switches activation of the wireless transmission means when the timer measures the predetermined time. system.

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