KR20070067774A - Wireless Radio Identification System with Motion Sensor and Bluetooth Module - Google Patents

Abstract

         The present invention is a radio frequency identification system (RFID system) application field by first detecting the movement of the entry target by the motion sensor in the security zone and store the image information of the entry target, and then activates the RFID tag by operating the RFID tag Collect information from the Tag and decide whether or not to enter. According to this function, the RFID reader can shorten the time to emit unnecessary radio waves, reduce the electromagnetic interference (EMI), and can track the movement path by the detection position of the motion sensor. It is a system that secures the wireless transmission section in the RFID system by transmitting the data to the host computer and expands the security area and expands its availability.

  The motion sensor detects the movement of the moving object, captures the image information of the moving object using a CCD camera, and transfers the image information to the host computer through the Bluetooth module, and the RFID reader and host. It is a system for transmitting to a wireless communication section using Bluetooth in the data communication section between the host (Host Computer).

   This system constitutes a piconet, which is a network of minimum members consisting of one master and seven slaves. The information of the tag and the real-time image information captured by the motion sensor are transmitted to a host computer from a reader composed of a plurality of slaves, thereby securing reliability as information for location tracking. Wireless communication section between reader and host computer is secured to expand freely within the range that wireless communication is possible without additional installation of communication equipment and communication line required for wired communication section according to installation and expansion of radio wave identification system. Installation is possible. The Scatternet configuration that extends Piconet, the smallest unit in the Bluetooth Network configuration, facilitates the expansion of readers and does not require additional equipment due to the expansion of readers. It has the effect of reducing expenses.

Description

Radio wave identification system with motion sensor and Bluetooth module {Add on Motion detector and Bluetooth for RFID}

       1 is a system configuration diagram

       2 is a procedure for the radio wave recognition (RFID) operation process

3 is a flow chart of information processing flow and data classification by radio wave recognition

The present invention is an application field of a radio frequency identification system (RFID system) to detect an object moving in a security zone with a motion sensor and simultaneously capture the moving object with a CCD camera and store it as image information, and the leader of a radio frequency identification system. Tag is activated to recognize Tag information. Information data of the recognized tag and image information detected by motion sensor are transmitted to host computer through Ad-Hoc network using Bluetooth module to provide real-time location tracking and image information. A method of enabling storage is provided.

The present invention detects the motion of a moving object entering and leaving using an ultra-high frequency band (10.525 GHz) as a motion sensor, and detects the motion and captures image information on the moving object through a CCD camera. The motion detection signal of the motion sensor is used as a signal for switching to the active state of the RFID reader, and is used as a starting point for the RFID reader to collect information of the RFID tag at the time when the motion sensor achieves motion detection. Such a process prevents the unnecessary radio wave emission of the RFID reader. Real-time location tracking technology that transfers RFID tag information and image information taken by CCD camera to host computer through Bluetooth Ad-Hoc Network and uses it as information data for real-time location recognition and information recognition of moving objects to be.

The present invention detects the object moving to enter and exit the security zone in the motion sensor and captures the image information about the moving object through the CCD camera. At the same time, the image information and motion sensor of the detected object detects the moving object, activates the RFID reader, recognizes the tag, and collects the collected tag information into the Bluetooth Ad-Hoc. Sends to a host computer through a network. A small group wireless communication network is constructed using a Bluetooth Ad-Hoc network to form a piconet, which is a minimum network composed of one master and seven slaves. The motion sensor predicts the location of the moving object and collects the preliminary information on the moving object by storing the image information. In this process, information of a tag collected from a reader and information about a real-time location movement path of a moving object are collected to secure reliability of real-time location tracking information.

       The present invention detects information on a moving path of a moving object using a motion sensor and activates a radio frequency identification (RFID) reader to reduce the generation of unnecessary electromagnetic waves, and between the RFID reader and the host computer. By securing wireless communication section and transmitting image information, it is possible to freely expand and install it within the range of wireless communication without additional installation of communication equipment and communication line necessary for wired communication section according to installation and expansion of wireless radio identification system. To ensure the reliability of the real-time location tracking information. The reader can be easily expanded by constructing a small group wireless communication network with the Bluetooth Ad-Hoc network and expanding the scatternet network structure that extends the minimum unit of piconet. There is a function to secure the reliability of real-time location tracking information by reducing the cost of equipment expansion because no additional equipment is needed according to the reader extension.

   It is possible to prevent the power consumption of the tag by repetitive recognition in the process of recognizing a built-in power tag.

Claims (3)

             According to the present invention, a motion sensor detects a moving object, stores image information through a CCD camera, collects tag information after activating an RFID reader, and collects image information and tags. Data transmission using the Bluetooth module loaded with the information: Image information about the moving object detected by the motion sensor and tag information recognized by the RFID reader Is a structure for wirelessly transmitting data to a host computer.           According to claim 1, the motion sensor detects a moving object, switches the RFID reader to an active state, collects information on the tag, and measures the distance of the tag by using the detection function of the motion sensor. Calculation structure: After the motion sensor detects a moving object, it activates the RFID reader, and the reader collects the built-in information of the tag, and the motion sensor uses the Doppler effect to move the distance of the moving object. Is predicted and combined with the image information to track the real-time movement path of the tag and transmitted along with the collected tag information to the host computer through the Bluetooth module (Bluetooth) module.            Structure of tracking the distance information and position of the tag collected by the reader by the real-time movement path of the moving object and the position correction by the image information by using the sensing distance and the image information of the motion sensor according to claim 2: The distance information predicts the distance by the amount that changes according to the detected voltage level, and uses the information of the tag collected by the RFID reader as the data for distance measurement and position calculation and corrects the distance with the image information. It is a structure to secure the reliability of the measurement.

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