Method and system for data communication in human body and sensor therefor
First Claim
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1. A method for transmitting a signal from a sensor put in a human body to the outside of the human body, the method comprising:
- generating electric potential difference between transmitting electrodes installed on the surface of the sensor, the sensor capable of being ingested and capable of traveling autonomously within the human body;
switching the transmitting electrodes according to information to be transmitted, to create;
a first state, wherein a first transmitting electrode has a higher electric potential and a second transmitting electrode has a lower electric potential; and
a second state, wherein the first transmitting electrode has a lower electric potential and the second transmitting electrode has a higher electric potential;
supplying a conduction current from the first transmitting electrode having the higher electric potential to an inside of the human body to flow a current through a surface of the human body back into the inside of the human body, and sinking the current to the second transmitting electrode having lower electric potential;
inducing a voltage between receiving electrodes installed on the surface of the human body by the current flowing through the surface of the human body; and
controlling an amount of the conduction current flowing through the body,wherein during the first state, a positive voltage is applied to the first transmitting electrode and the second transmitting electrode is grounded, andwherein during the second state, the first transmitting electrode is grounded and the positive voltage is applied to the second transmitting electrode.
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Abstract
The present invention provides method and system for data communication in the human body and a sensor therefor. The method and system transmit information through the human body to a receiver located outside the human body using low current and voltage polarity, so that they cause no damage to the human body and achieve low power consumption and better receiving sensitivity. In addition, the sensor contains a CMOS image sensor on which all circuits are integrated without radio transmitter and antenna, so that it achieves a low-priced and small-sized capsule type endoscope.
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Citations
21 Claims
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1. A method for transmitting a signal from a sensor put in a human body to the outside of the human body, the method comprising:
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generating electric potential difference between transmitting electrodes installed on the surface of the sensor, the sensor capable of being ingested and capable of traveling autonomously within the human body; switching the transmitting electrodes according to information to be transmitted, to create; a first state, wherein a first transmitting electrode has a higher electric potential and a second transmitting electrode has a lower electric potential; and a second state, wherein the first transmitting electrode has a lower electric potential and the second transmitting electrode has a higher electric potential; supplying a conduction current from the first transmitting electrode having the higher electric potential to an inside of the human body to flow a current through a surface of the human body back into the inside of the human body, and sinking the current to the second transmitting electrode having lower electric potential; inducing a voltage between receiving electrodes installed on the surface of the human body by the current flowing through the surface of the human body; and controlling an amount of the conduction current flowing through the body, wherein during the first state, a positive voltage is applied to the first transmitting electrode and the second transmitting electrode is grounded, and wherein during the second state, the first transmitting electrode is grounded and the positive voltage is applied to the second transmitting electrode. - View Dependent Claims (2, 3, 4, 5)
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6. A system for data communication in a human body, the system comprising:
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a sensor, which is put in the human body, and having transmitting electrodes installed on a surface of the sensor configured to be electrically isolated and configured to generate electric potential difference, the sensor capable of being ingested and capable of traveling autonomously within the human body, a coding circuit located in the sensor; a switching circuit that switches, based on an output from the coding circuit, the transmitting electrodes, to create; a first state, wherein a first transmitting electrode has a higher electric potential and a second transmitting electrode has a lower electric potential; and a second state, wherein the first transmitting electrode has a lower electric potential and the second transmitting electrode has a higher electric potential; a receiver installed on a surface of the human body to receive a conduction current generated by the electric potential difference through the human body; and a circuit to control an amount of the conduction current flowing through the body, wherein during the first state, the switching circuit applies a positive voltage to the first transmitting electrode and grounds the second transmitting electrode, and wherein during the second state, the switching circuit grounds the first transmitting electrode and applies the positive voltage to the second transmitting electrode. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for transmitting a signal from a capsule type endoscope put in a human body to an outside of the human body, the method comprising:
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generating electric potential difference between a first transmitting electrode and a second transmitting electrode installed on a surface of a capsule type endoscope, the capsule type endoscope capable of being ingested and capable of traveling autonomously within the human body; switching the transmitting electrodes according to information to be transmitted, to create; a first state, wherein the first transmitting electrode has a higher electric potential and the second transmitting electrode has a lower electric potential; and a second state, wherein the first transmitting electrode has a lower electric potential and the second transmitting electrode has a higher electric potential; supplying a conduction current from the first transmitting electrode having a higher electric potential to an inside of the human body to flow a current through a surface of the human body back into the inside of the human body and sinking the current to the second transmitting electrode having the lower electric potential; inducing a voltage between receiving electrodes installed on the surface of the human body by the current flowing through the surface of the human body; and controlling an amount of the conduction current flowing through the body, wherein the capsule type endoscope makes a current flow from one transmitting electrode to the other transmitting electrode when a signal to be transmitted is a digital signal “
1” and
makes a current flow from the other transmitting electrode to one transmitting electrode when a signal to be transmitted is a digital signal “
0.” - View Dependent Claims (20, 21)
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Specification