TWI398830B - Mobile smart RFID reader - Google Patents

Description

Mobile smart RFID reading device

The invention relates to a mobile intelligent RFID reading device, in particular to a Zigbee transmitting unit combined with an RFID mobile reader configured on the body, thereby utilizing the body to patrol and monitor the security status of the preserved item in a specific space.

In recent years, in the case of a social and economic downturn, thefts in homes, campus environments, and corporate companies have emerged in an endless stream. The successful cases of piracy expose the shortcomings of existing security personnel and surveillance imaging equipment. Even with a fixed camera, the intruder can dodge the camera's dead end or steal from an unexpected channel. Regulatory patrols can prevent fixed monitoring problems, but usually due to human error or fatigue. On the other hand, most of the control of valuables is still protected by locks. However, with high-tech door locks, thieves can also destroy or crack in a short time. After stealing items, they can be locked back. If there is no regular inspection, it is very It is difficult to detect if the item is lost.

Therefore, the Republic of China Patent No. M351695 "Unpowered Mobile Vehicle Improved Structure" discloses the vehicle body including the armrest frame, the seat portion and the mounting portion; the scaffolding, including the vertical bracket and the link The top end portion of the vertical support bracket is disposed on the carrier body, and the top frame portion is horizontally or obliquely disposed on the carrier body by the vertical bracket being raised a state in which the solar panel is disposed on the top frame of the scaffold; a battery is disposed on the carrier body, and the battery is electrically connected to the solar panel to accumulate the solar panel The generated electrical energy; thereby, the unpowered mobile vehicle can be used up to It has the function of shielding and self-power supply.

However, the disadvantage is that the above-mentioned system has disclosed the technical means that only the solar energy is converted into electric energy for movement, but for the preserved articles, the above patent cannot perform mobile patrol monitoring in a specific space, and there is no combination. The RFID reading device, so when the article is preserved, but is illegally opened to destroy the theft, the above patent can not play the role of preservation.

The present invention addresses the problem of being unable to perform item security on an RFID reading device in a particular space.

The invention relates to a mobile intelligent RFID reading device, comprising: a body, which is provided with a transmission component and a wheel set, wherein the transmission component is connected to the wheel set; and a processing unit is disposed inside the body , the RFID device is electrically connected to the processing unit, and is disposed on the body, and is electrically connected to the processing unit. The wireless communication unit is disposed in the interior of the body and is electrically connected to the processing unit. The wireless communication unit receives at least one control command through a wireless communication method, and transmits the control command to the processing unit, and the processing unit outputs a control signal to the transmission component to drive the wheel group to generate a corresponding action.

The present invention further includes at least three Zigbee sensors located at different positions and having the same radio frequency as the Zigbee transmitting unit, receiving the transmission signal of the Zigbee transmitting unit, and generating a signal through the received signal intensity localization rule. Location message.

The RFID mobile reader described above is relatively moved to the body.

The invention further includes a photographing unit disposed on the body and electrically connected to the processing unit.

The communication protocol used by the above wireless communication unit is Zigbee, Wi-Fi, Wi-max or Bluetooth.

The above wheel set has three wheels, the wheels are equidistantly disposed on a circumferential path, and each wheel rolls in any direction.

The advantages of the invention are:

1. The invention can utilize the body to sense the state of the preserved article in a specific space, and the movement mode is moved through the coordinates of the three Zigbee sensors, so that the body can know the position of the body at any time, thereby achieving the purpose of patrolling.

2. The invention applies the RFID identification technology as a security item management mechanism, and can wirelessly sense the security status of the item, and can grasp the state of the preserved item at any time.

3. The invention combines with the wireless communication unit to reduce geographical restrictions and transmit information through the network platform, and can monitor items at the near end or the far end.

4. The body of the present invention can replace the patrol of the maintenance personnel to avoid the problem of loopholes due to human error or fatigue.

5. The RFID mobile reader on the main body can perform reading operations on multiple RFID tags of the protected items at the same time, and perform one-to-many security monitoring.

6. In the present invention, a photographing unit is incorporated as a monitor for influencing monitoring, and a low-cost passive RFID tag can be used to achieve the function of anti-theft.

(1) ‧‧‧ Ontology

(11)‧‧‧Transmission components

(12) ‧‧‧ wheel sets

(121)‧‧‧ Wheels

(2) ‧‧‧Processing unit

(3) ‧‧‧RFID mobile reader

(4) ‧‧‧Zigbee launching unit

(5) ‧‧‧Wireless communication unit

(6A)‧‧‧First Zigbee Sensor

(6B)‧‧‧Second Zigbee Sensor

(6C)‧‧‧ Third Zigbee Sensor

(7) ‧‧‧Photographic unit

(A) ‧ ‧ preserved items

(B) ‧‧‧RFID tags

(C) ‧‧‧Server

The first figure is a schematic view of the appearance of the present invention.

The second figure is a plan view of the present invention.

The third figure is a block diagram of the device architecture of the present invention.

The fourth figure is a schematic diagram of the movement of the mobile unit according to the present invention according to the coordinate position.

The fifth figure is the mapping relationship between the signal intensity localization rule between the body and the Zigbee sensor.

The sixth picture is a flow chart of the photography unit monitoring system.

First, please refer to the first figure and the second figure, the invention is a mobile smart RFID The reading device includes:

A body (1) is provided with a transmission element (11) and a wheel set (12), wherein the transmission element (11) is connected to the wheel set (12), wherein the wheel set (12) has three wheels ( 121), the wheels (121) are equidistantly disposed on a circumferential path, and each wheel (121) rolls in any direction.

A processing unit (2) is disposed inside the body (1) and electrically connected to the transmission component (11).

An RFID mobile reader (3) is disposed on the body (1) and electrically connected to the processing unit (2), wherein the RFID mobile reader (3) is relatively moved to the body (1).

A Zigbee transmitting unit (4) is disposed on the body (1) and electrically connected to the processing unit (2) for transmitting a wireless signal to generate a location message.

A wireless communication unit (5) is disposed inside the body (1) and electrically connected to the processing unit (2), wherein the communication protocol used by the wireless communication unit (5) is Zigbee, Wi-Fi, Wi- Max or Bluetooth.

The wireless communication unit (5) receives at least one control command through wireless communication, and transmits the control command to the processing unit, and the processing unit (2) outputs a control signal to the transmission component (11) to drive the wheel. The group (12) generates a corresponding action, and further comprising at least three Zigbee sensors located at different locations and having the same radio frequency as the Zigbee transmitting unit (4) receiving the Zigbee transmitting unit (4) The transmitted signal is transmitted to receive a positional message by receiving a signal strength (Resived Signal Strength, RSS).

A photographing unit (7) is further disposed on the main body (1), and is electrically connected to the processing unit (2).

When implemented, please refer to the second, third and fourth figures, which is to place the body (1) in a specific space, such as an office space, a bank or a campus, etc., coordinates in the specific space ( x _A , y _A ) has a first Zigbee sensor (6A), a coordinate in a specific space ( x _B , y _B ) with a second Zigbee sensor (6B) and a coordinate in a specific space ( x _C , y _C ) a third Zigbee sensor (6C), the first Zigbee sensor (6A), the second Zigbee sensor (6B) and the third Zigbee sensor (6C) receive the Zigbee transmitting unit (4) of the body (1) the wireless signal, and (RSS) positioning rule received signal strength through, respectively the body (1) and the first inductor Zigbee (. 6A), Zigbee second sensor (6B) and the third sensor Zigbee distance r _a, r _B , r _C , and then obtain the position information of the body (1) in the specific space ( x _O , y _O ) (as shown in the fifth figure), the position message is transmitted to the wireless communication unit (5) to A servo terminal (C).

The servo end records in advance the coordinate information of each protected item (A). When it grasps the coordinates ( x _O , y _O ) of the main body (1), it wants to control the movement of the main body (1), the servo end (C Transmitting a control command to the wireless communication unit (5) wirelessly according to the current position information of the body (1) (ie, coordinates ( x _O , y _O )), the control command including moving the route, moving the speed, stopping the movement Or turning angle and direction parameters, and the wireless communication unit (5) transmits the control command to the processing unit (2), and the processing unit (2) outputs a control signal to the transmission component (11) to drive the wheel set (12) Generate corresponding mechanical actions. Thereby, the body (1) moves to the vicinity of the secured item (A), and detects the RFID tag (B) on the preserved item (A) through the RFID action reader (11), and the RFID action is read. The device (3) is configured to recognize the condition of the protected item (A) to which the RFID tag (B) to which the identification code is written is attached, and when the RFID mobile reader (3) scans the RFID tag is not integrated ( When the protected item (A) is B), the RFID mobile reader (3) transmits a message to the remote server (C) or the monitoring device via the wireless communication unit (5) via the processing unit (2).

The invention uses the photographing unit (7) as a monitor for image monitoring, and uses grayscale image processing technology. In the first step of image processing, the image obtained by the photographing unit (7) is converted from color to gray scale. Equation (2) is a conversion formula for converting color image RGB into Y, Cb, and Cr coordinate systems: In this formula, the Y value is the luminance value in the color image, the grayscale image used in the present invention, and the grayscale image which is the Y value component after the color coordinate conversion. In addition, edge information plays an important role in image processing. Most of the intrusion actions are divided into brightness or color information. The change of edge information is the basis for common intrusion messages. The present invention uses the Sobel edge detection algorithm to find the formula for calculating the maximum change in the gray value between pixels in an image. After obtaining the edge image, it is inevitable that its noise will be amplified along with the edge detection process. Therefore, a 3×3 median filter is executed to remove noise. The definition is as follows: The image index value is the grayscale value of the pixel in the image, and the grayscale value of the pixel after the mediation of M ( x, y ), k, l = -1 , 0 , 1.

After obtaining two color images in succession, two median grayscale edge images can be obtained through the image processing described above, and the images processed by the two images are used for image subtraction in the present invention. The result of the subtraction is the result of image motion detection, and the schematic diagram of the process processing is shown in the sixth figure and the annex.

The design of the invention can enhance the active protection measures of the preserved item (A), and the user can position the body (1) through the at least three Zigbee sensors (6) and make the body (1) in a specific space. The patrol investigation inside can replace the patrol of the maintenance personnel. It can avoid the problem of loopholes caused by human error or fatigue. If it is stolen, it will send abnormal information to the remote end through the network platform to perform instant preservation.

(1) ‧‧‧ Ontology

(11)‧‧‧Transmission components

(12) ‧‧‧ wheel sets

(121)‧‧‧ Wheels

(2) ‧‧‧Processing unit

(3) ‧‧‧RFID mobile reader

(4) ‧‧‧Zigbee launching unit

(5) ‧‧‧Wireless communication unit

(7) ‧‧‧Photographic unit

Claims (5)

A mobile intelligent RFID reading device for patrolling and monitoring a secured item in a specific space, comprising: a body having a transmission component and a wheel set, wherein the transmission component is connected to the wheel set a processing unit disposed inside the body and electrically connected to the transmission component; an RFID mobile reader disposed on the body and electrically connected to the processing unit; and an RFID tag disposed on the protected item a Zigbee transmitting unit is disposed on the body and electrically connected to the processing unit for transmitting a wireless signal to generate a location message to obtain a location of the body in the specific space; a wireless communication unit, setting Inside the main body, electrically connected to the processing unit, and output the position information; a servo end, the servo end records in advance the coordinate information of the secured item in the specific space, and receives the wireless a location message outputted by the communication unit; a camera unit disposed on the body and electrically connected to the processing unit; the server is based on the bit The message obtains the position of the body in the specific space, and then transmits a control command according to the coordinate information of the secured item in the specific space, the wireless communication unit accepts the control command by wireless communication, and The control command is transmitted to the processing unit, and the processing unit outputs a control signal to the transmission component to drive the wheel set to generate a corresponding action, thereby moving the body to the vicinity of the secured item and passing the RFID mobile reader Detecting the RFID tag on the protected item, when the RFID mobile reader scans the secured item combined with the RFID tag, the RFID mobile reader transmits the message to the wireless communication unit via the processing unit to The camera unit uses a grayscale image processing technology, the camera unit converts the obtained color image into a grayscale image, and the formula (2) converts the color image RGB into a Y, Cb, and Cr coordinate system. formula: In this formula, the Y value is the luminance value in the color image, and the grayscale image is the grayscale image of the Y value component after the color coordinate conversion; the Sobel edge detection algorithm is used to find the pixels in the image. If the gray value changes greatly, the formula for calculating the maximum amount of change is as follows: After the edge image is obtained, a 3×3 median filter is executed to remove the noise, which is defined as follows: Where x, y is the image index value, f(x, y) is the grayscale value of the pixel in the image, and the grayscale value of the pixel after the medianization of M(x, y), k, l=-1, 0, 1 After obtaining two color images in succession, two median grayscale edge images can be obtained through the image processing described above, and the images processed by the two image images are subtracted to obtain image variation detection results. The result of the detection is transmitted to the server through the wireless communication unit. The mobile intelligent RFID reading device of claim 1, further comprising at least three Zigbee sensors located at different positions and having the same radio frequency as the Zigbee transmitting unit It receives the transmission signal of the Zigbee transmitting unit and generates a position message by receiving the signal strength localization rule. A mobile intelligent RFID reading device as claimed in claim 1, wherein the RFID The action reader is relatively moved to the body. The mobile smart RFID reading device according to claim 1, wherein the communication protocol used by the wireless communication unit is Zigbee, Wi-Fi, Wi-max or Bluetooth. A mobile intelligent RFID reading device according to claim 1, wherein the wheel set has three wheels, the wheels are equidistantly disposed on a circumferential path, and each wheel rolls in any direction.