Proximate sensor using micro impulse waves for monitoring the status of an object, and monitoring system employing the same
First Claim
1. A proximity sensor provided in each wireless communication node which is installed inside of an object of surveillance for surveying the inside status of said object of surveillance, comprising:
- an output means to output microimpulse waves from the wireless communication node toward the three dimensional directions inside of said object of surveillance;
a receiving means to receive the reflected waves of said output microimpulse waves which are reflected on the articles loaded inside of said object of surveillance; and
a detecting means to detect a characteristic data in said received reflected waves received by said receiving means for surveying the inside status of said object of surveillance, wherein said detecting means shares said characteristic data with other proximity sensors provided in said object of surveillance for obtaining a network structure information of said object.
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Abstract
The objective of the present invention is to provide proximity sensors employing impulse waves to detect the characteristics of objects lying inside the object of surveillance, such as a container, including their distance, the reflection strength from an object, the speed an object is moving, etc., as well as to provide a status surveillance system which detects, from the data from the proximity sensors, that the inside of the container remains unchanged. To achieve the foregoing objectives, the present invention adds proximity sensor functions to wireless communication nodes inside of the object of surveillance, such as inside of a container. Said proximity sensors output microimpulse waves from the wireless communication nodes, and said communication nodes receive the reflections of those waves from nearby objects. The wave reception sampling is performed based upon the bit signals of the clock for the microimpulse transmissions and the local clock, and the analysis of the received signals enables the highly precise measurement of the distance to an object using simple circuitry. It is then possible to detect an abnormal occurrence inside the object of surveillance by comparing the characteristic data obtained from the initial environment with that data obtained during the period of surveillance. Further, the proximity sensing function is able to detect the direction of any penetration.
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Citations
13 Claims
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1. A proximity sensor provided in each wireless communication node which is installed inside of an object of surveillance for surveying the inside status of said object of surveillance, comprising:
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an output means to output microimpulse waves from the wireless communication node toward the three dimensional directions inside of said object of surveillance;
a receiving means to receive the reflected waves of said output microimpulse waves which are reflected on the articles loaded inside of said object of surveillance; and
a detecting means to detect a characteristic data in said received reflected waves received by said receiving means for surveying the inside status of said object of surveillance, wherein said detecting means shares said characteristic data with other proximity sensors provided in said object of surveillance for obtaining a network structure information of said object. - View Dependent Claims (2, 3, 4)
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5. A proximity sensor provided in each wireless communication node which is installed inside of the object of surveillance, said proximity sensor detecting a direction of unauthorized penetration in which an unauthorized article penetrates a wall of said object of surveillance, comprising:
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an output means to output two layered microimpulse waves from the wireless communication node towards the two dimensional directions parallel to the wall of said object of surveillance;
a receiving means to receive two reflected waves of said two layered microimpulse waves which are reflected on said unauthorized article penetrating said wall of said object of surveillance; and
a detecting means to detect a characteristic data in said two received reflected waves of said two layered microimpulse waves for detecting said direction of unauthorized penetration, wherein said detecting means shares said characteristic data with other proximity sensors provided in said object of surveillance for obtaining a network structure information of said object. - View Dependent Claims (6, 7)
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8. A status surveillance system to monitor the status of an object of surveillance using microimpulse waves, comprising:
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a first detecting means to detect a plurality of mutual distances between a plurality of communication nodes by outputting microimpulse waves toward the three dimensional directions inside of said object of surveillance, and obtain a network structure information of said object by said plurality of detected mutual distances; and
a second detection means to detect a characteristic data in a plurality of reflected waves which are reflected on the articles loaded inside of said object of surveillance;
wherein said status surveillance system monitors said status of said object of surveillance by said network structure information and said characteristic data. - View Dependent Claims (9, 10, 11)
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12. A status surveying method to survey the inside status of an object of surveillance, comprising the steps of:
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outputting microimpulse waves from a wireless communication node towards the three dimensional directions inside of said object of surveillance;
receiving the reflected waves of said output microimpulse waves which are reflected on the articles loaded inside of said object of surveillance;
detecting a characteristic data in said received reflected waves received by said receiving means for surveying the inside status of said object of surveillance; and
sharing said characteristic data with other proximity sensors provided in said object of surveillance for obtaining a network structure information of said object.
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13. A status surveying method to survey the inside status of an object of surveillance, comprising the steps of:
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detecting a plurality of mutual distances between a plurality of communication nodes by outputting microimpulse waves towards the three dimensional directions inside of said object of surveillance, and obtain a network structure information of said object by said plurality of detected mutual distances;
detecting a characteristic data in a plurality of reflected waves which are reflected on the articles loaded inside of said object of surveillance; and
monitoring said status of said object of surveillance by said network structure information and said characteristic data.
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Specification