CN109978098B - RFID-based bridge fitting identification system - Google Patents

Abstract

The invention discloses an RFID-based bridge fitting identification system, comprising a reader module and a passive label module. The reader module is embedded in the online walking robot, and the passive tag module is fixedly arranged on the bridge fitting. The reader module is used to wirelessly transmit a preset high-frequency signal combination, the high-frequency signal combination includes a plurality of high-frequency signals whose transmission power is sequentially increased, and each high-frequency signal has a corresponding effective coverage distance. In the RFID-based bridge hardware identification system disclosed by the invention, before the online walking robot crosses the bridge, as long as the reader can read the label information and the handshake is successful, it can know that there is a corresponding obstacle in front, so that the robot can perform the corresponding operation. Complete the bridge. There is no need to judge the size and shape of the obstacle, and it is not necessary to measure the precise distance between the robot and the tower head in real time to complete the bridge-crossing action.

Description

RFID-based bridge fitting identification system

technical field

The invention belongs to the technical field of high-voltage transmission line communication, and in particular relates to an RFID-based bridge fitting identification system.

Background technique

RFID is radio frequency identification, which is a technology for automatic identification based on wireless communication electromagnetic waves with a certain frequency. RFID is a radio application technology that locates and tracks targets in a non-contact state, and reads and writes target information. RFID systems are widely used in many industries. For example, in the field of warehousing and logistics, the tracking management of the supply chain can be realized; in the supermarket retail industry, real-time management of commodities and consumption guidance can be realized; in the field of transportation, intelligent scheduling, access control and charging management can be realized; in the military field, material allocation and anti-counterfeiting can be realized Confidentiality; in the field of food and medicine, it can realize origin traceability and safety supervision; in the animal husbandry and mining industry, it can realize functions such as positioning and tracking.

The publication number is CN206656792U, the main name is the utility model patent of integrated RFID automatic weighing and settlement platform, and its technical scheme discloses "a load cell 2 is provided on the machine 1, and a load cell 2 is provided on the load cell 2. The weighing unpowered pallet 3 is also provided with an RFID card reader antenna 4 on the machine 1 and located on one side of the weighing unpowered pallet 3, and a control box 5 and a control box 5 are also provided on the machine 1. The display device 6, the load cell 2, the RFID card reading antenna 4 and the display device 6 are all electrically connected to the control box 5. A material frame detection device is also provided on the board of the RFID card reading antenna 4. Sensor 7, the material frame detection sensor 7 is signally connected to the control box 5. The support platform of the weighing unpowered pallet 3 is inclined from the incoming material to the outgoing direction. The supporting platform is composed of several rollers 8. A baffle plate 9 is provided at the discharge end of the support platform. A guardrail 10 is also provided on the machine table 1 and on the outside of the weighing unpowered pallet 3. A support is provided under the machine table 1 feet 11".

However, taking the above utility model patent as an example, the environment and objects containing metal and moisture will interfere with the practical application of RFID.

SUMMARY OF THE INVENTION

Aiming at the situation of the prior art, the present invention overcomes the above-mentioned defects, and provides an RFID-based bridge fitting identification system.

The present invention adopts the following technical solutions, and the RFID-based bridge fitting identification system is used to roughly measure the distance between the online walking robot and the bridge fitting, including:

a reader module, the reader module is embedded in the online walking robot;

a passive label module, the passive label module is fixedly arranged on the bridge fitting;

The reader module is used for wirelessly transmitting a preset high-frequency signal combination, the high-frequency signal combination includes a plurality of high-frequency signals whose transmission power is sequentially increased, and each high-frequency signal has a corresponding effective coverage distance;

The passive tag module is used to receive the above-mentioned high-frequency signal and wirelessly return the tag information built in the passive tag module;

The reader module is further configured to receive the above-mentioned tag information and determine and obtain a high-frequency signal with a minimum transmit power according to the above-mentioned tag information.

According to the above technical solution, as a further preferred technical solution of the above technical solution, the reader module is further configured to determine and obtain a high-frequency signal with the second minimum transmission power according to the tag signal, and the reader module is further configured to obtain a high-frequency signal with the second minimum transmission power according to the above-mentioned minimum transmission power. The high-frequency signal and the high-frequency signal of the second minimum transmission power are converted to obtain the distance interval between the reader and the passive tag module.

According to the above technical solution, as a further preferred technical solution of the above technical solution, the reader/writer module is used for docking the mainboard and the adapter board externally placed on the reader/writer module, and the reader/writer module includes a data transmission interface, a control unit, radio frequency module, reader antenna and power supply module, including:

the data transmission interface is electrically connected with the mainboard and establishes a communication connection;

The data transmission interface, the control unit, the radio frequency module and the reader antenna are electrically connected in sequence and a two-way communication connection is established;

The power module is electrically connected with the adapter board.

According to the above technical solution, as a further preferred technical solution of the above technical solution, the reader antenna is used to transmit electromagnetic energy to activate the tag chip located in the passive tag module, and at the same time receive the tag information returned from the tag chip in a wireless form.

According to the above technical solution, as a further preferred technical solution of the above technical solution, the radio frequency module is used for transmitting and receiving high frequency signals.

According to the above technical solution, as a further preferred technical solution of the above technical solution, the control unit is used to control the transmission and reception of the radio frequency module, and to encrypt and decrypt the communication process between the radio frequency module and the tag chip.

According to the above technical solution, as a further preferred technical solution of the above technical solution, the data transmission interface is used to establish a connection channel between the control unit and the application layer of the main board.

According to the above technical solution, as a further preferred technical solution of the above technical solution, the passive tag module includes a tag chip and a passive tag antenna, and the tag chip and the tag chip antenna are powered by high-frequency signals.

According to the above technical solution, as a further preferred technical solution of the above technical solution, the passive tag antenna is used for wirelessly transmitting tag information.

The RFID-based bridge hardware identification system disclosed by the invention has the beneficial effect that, before the online walking robot crosses the bridge, as long as the reader can read the label information and the handshake is successful, it can know that there is a corresponding obstacle ahead. So the robot performs the corresponding operation to complete the bridge. There is no need to judge the size and shape of the obstacle, and it is not necessary to measure the precise distance between the robot and the tower head in real time to complete the bridge-crossing action.

Description of drawings

FIG. 1 is a schematic diagram of a process control of an embodiment of the present invention.

FIG. 2 is a system block diagram of a reader module according to an embodiment of the present invention.

FIG. 3 is a system block diagram of a wireless tag module according to an embodiment of the present invention.

Reference numerals include: 10-mainboard; 20-adapter board; 100-reader module; 110-data transmission interface; 120-control unit; 130-radio frequency module; 140-reader antenna; 150-power module; 200-passive tag module; 210-passive tag chip; 220-passive tag antenna.

Detailed ways

The present invention discloses an RFID-based bridge fitting identification system. The specific implementation of the present invention will be further described below with reference to the preferred embodiments.

Referring to FIG. 1 to FIG. 3 of the accompanying drawings, FIG. 1 shows the process control mode of the RFID-based bridge fitting identification system, and FIG. 2 shows the correlation of the reader module of the RFID-based bridge fitting identification system. Structure, FIG. 3 shows the relevant structure of the passive tag module of the RFID-based bridge fitting identification system.

Preferred embodiment.

Preferably, referring to FIG. 2 and FIG. 3 of the accompanying drawings, the RFID-based bridge fitting identification system is used to roughly measure the distance between the online walking robot and the bridge fitting, and the RFID-based bridge fitting identification system include:

Reader module 100, the reader module 100 is embedded in a (movable) online walking robot (online robot/robot, not shown in the figure);

The passive tag module 200, the passive tag module 200 is fixedly arranged on the bridge fitting (not shown in the figure);

The reader module 100 is used to wirelessly transmit a preset high-frequency signal combination, the high-frequency signal combination includes a plurality of high-frequency signals whose transmission power is sequentially increased, and each high-frequency signal has a corresponding (and determined) Effective coverage distance;

The passive tag module 200 is configured to receive the above-mentioned high-frequency signal and wirelessly return the tag information built in the passive tag module 100 (using the high-frequency signal as the working power source);

The reader/writer module 100 is further configured to receive the above-mentioned tag information and determine and obtain a high-frequency signal with a minimum transmit power (that can successfully shake hands) according to the above-mentioned tag information.

It is worth mentioning that the reader module 100 can also obtain the effective coverage distance corresponding to the high-frequency signal according to the high-frequency signal conversion of the above-mentioned minimum transmission power, that is, to know the difference between the reader-writer 100 (online walking robot) and the wireless signal. Distance between source tag modules 200 (bridge fittings).

Further, since the actual corresponding effective coverage distance of each high-frequency signal of the above-mentioned high-frequency signal combination is a discrete value (the arrangement between discrete values is too dense will lead to unacceptable material cost or additional unnecessary interference), so In other words, the effective coverage distances corresponding to adjacent high-frequency signals will form corresponding distance intervals. In addition, because the technical problem to be solved by the patent application of the present invention does not require judging the size and shape of the obstacle, nor does it need to accurately measure the high-precision distance between the robot and the bridge fitting in real time, the patent application of the present invention can just judge the robot. Which distance range the distance from the bridge fittings falls into is sufficient to achieve the purpose of rough obstacle avoidance of the present invention.

Further, the reader module 100 is also used to determine and obtain a high-frequency signal of the second minimum transmission power (that can successfully shake hands) according to the tag signal, and the reader module 100 determines the high-frequency signal of the minimum transmission power according to the above-mentioned minimum transmission power. and the high-frequency signal of the second minimum transmission power to obtain the distance interval between the reader/writer 100 (online walking robot) and the passive tag module 200 (bridge fittings).

Further, the reader module 100 is used for docking with the main board 10 and the adapter board 20 externally placed on the reader module 100 , and the reader module 100 includes a data transmission interface 110 , a control unit 120 , and a radio frequency module 130 . , reader antenna 140 and power module 150, wherein:

The data transmission interface 110 is electrically connected to the mainboard 10 and establishes a communication connection;

The data transmission interface 110, the control unit 120, the radio frequency module 130 and the reader/writer antenna 140 are electrically connected in sequence and a two-way communication connection is established;

The power module 150 is electrically connected to the adapter board 20 and provides working power to other electrical appliances such as the radio frequency module 130 .

Further, the reader antenna 140 is used for emitting electromagnetic energy to activate the tag chip 210 located in the passive tag module 200 , and at the same time receiving the tag information returned from the tag chip 210 in a wireless form.

Further, the radio frequency module 130 is used for transmitting and receiving high frequency signals.

Further, the control unit 120 is used to control the transmission and reception of the radio frequency module 130 , and to encrypt and decrypt the communication process between the radio frequency module 130 and the tag chip 210 .

Further, the data transmission interface 110 is used to establish a connection channel between the control unit 120 and the application layer of the main board 10 .

Further, the passive tag module 200 includes a tag chip 210 and a passive tag antenna 220, and the tag chip 210 and the tag chip antenna 220 are powered by high-frequency signals.

Further, the passive tag antenna 220 is used to wirelessly transmit (return) tag information.

According to the above-mentioned preferred embodiment, the RFID-based bridge fitting identification system disclosed in the patent application of the present invention, referring to FIG. 1 of the accompanying drawings, its process control is explained as follows: the online walking robot normally travels to 3 meters from the bridge fitting A, The reader reads the passive tag 1 on the A side of the fitting, and then feeds it back to the main board. The main board controls the walking motor to decelerate and drive forward at a low speed. In the process of approaching end A, the reader will continue to send out signals to update the approximate distance between the robot and the hardware. When the robot starts to cross the bridge through the bridge fittings and travels a certain distance, the reader reads the information of the passive tag 2 on the B-side of the fittings, and updates the approximate distance to it in real time. After passing the B end of the fitting, the robot completes crossing the bridge, and still drives forward at a low speed to 3 meters away from the B end of the fitting. At this time, the passive tag 2 exceeds the reading range of the reader, and the two handshake and disconnect. The reader does not receive the tag 2 signal, and feeds it back to the main board. The main board controls the travel motor to accelerate and drive at the normal speed.

Specifically, the RFID reader is installed on the online robot and continuously sends out signals, while the passive tag is installed on the bridge fittings. When the robot is about to cross the bridge and get close to the hardware, the reader can read the information of the tag at a certain distance, so as to prompt the robot to cross the bridge at a certain distance in front of it. When crossing the bridge is completed, the robot cannot receive passive tag information after traveling a certain distance, so as to prompt the completion of crossing the bridge.

The approximate way of judging the distance between the RFID reader and the passive tag is to adjust the transmission power of the reader. For example, first determine the minimum transmission power F1, F2 and F3 of the reader when the distance between the reader and the passive tag is 1m, 2m and 3m, and then the reader sends 3 powers in turn. At 3 meters, only the transmission power of F3 can make it shake hands, at 2 meters, F2 and F3 can make it shake hands, and at 1 meter, F1, F2 and F3 can make it shake hands. By judging the minimum power of the transmit power handshake, the connection and distance can be roughly judged.

According to the above preferred embodiment, the RFID-based bridge fitting identification system disclosed in the patent application of the present invention provides an online walking robot with a mechanism that is easy to realize object identification, and realizes the robot's bridge-crossing action. Its beneficial effects are described as follows: Before the walking robot crosses the bridge, as long as the reader can read the tag information and the handshake is successful, it will know that there is a corresponding obstacle ahead, and the robot will perform the corresponding operation to complete the bridge crossing. There is no need to judge the size and shape of the obstacle, and it is not necessary to measure the precise distance between the robot and the tower head in real time to complete the bridge-crossing action.

For those skilled in the art, the technical solutions described in the foregoing embodiments can still be modified, or some technical features thereof can be equivalently replaced. Any modifications made within the spirit and principles of the present invention, Equivalent replacements, improvements, etc., should all be included in the protection scope of the present invention.

Claims (8)

1. an RFID-based bridge fitting identification system, for roughly measuring the distance between the online walking robot and the bridge fitting, is characterized in that, comprising: a reader module, the reader module is embedded in the online walking robot; a passive label module, the passive label module is fixedly arranged on the bridge fitting; The reader module is used to wirelessly transmit a preset high-frequency signal combination, the high-frequency signal combination includes a number of high-frequency signals with sequentially increasing transmission power, and each high-frequency signal has a corresponding effective coverage distance. The actual corresponding effective coverage distance of each high-frequency signal of the combination of high-frequency signals is a discrete value; The passive tag module is used to receive the above-mentioned high-frequency signal and wirelessly return the tag information built in the passive tag module; The reader module is also used for receiving the above-mentioned tag information and judging to obtain the high-frequency signal with the minimum transmission power according to the above-mentioned tag information; The reader module is also used to determine and obtain a high-frequency signal of the second minimum transmission power according to the tag signal, and the reader module is configured to obtain the high-frequency signal of the second minimum transmission power according to the high-frequency signal of the minimum transmission power and the high-frequency signal of the second minimum transmission power. Obtain the distance interval between the reader and the passive tag module by conversion; The distance judgment method between the reader module and the passive tag module is realized by adjusting the transmission power of the reader module. First, determine the first distance, the second distance and the distance between the reader module and the passive tag module. The minimum transmit power of the reader at the third distance is F1, F2 and F3, and then the reader module sends 3 powers in turn. When the two are at the third distance, only the transmit power of F3 can make it shake hands. At the second distance, F2 and F3 can shake hands. At the first distance, F1, F2 and F3 can shake hands. By judging the minimum power of the transmit power handshake, the reader module and the passive tag module can be judged. the distance. 2. RFID-based bridge fitting identification system according to claim 1, is characterized in that, described reader/writer module is used for docking the mainboard and adapter board that is externally placed on reader/writer module, and described reader/writer module The module includes a data transmission interface, a control unit, a radio frequency module, a reader/writer antenna and a power supply module, among which: the data transmission interface is electrically connected with the mainboard and establishes a communication connection; The data transmission interface, the control unit, the radio frequency module and the reader antenna are electrically connected in sequence and a two-way communication connection is established; The power module is electrically connected with the adapter board. 3. The RFID-based bridge fitting identification system according to claim 2, wherein the reader/writer antenna is used to transmit electromagnetic energy to activate the tag chip located in the passive tag module, and to receive the wireless tag chip from the tag chip at the same time. The label information returned by the form. 4. The RFID-based bridge fitting identification system according to claim 2, wherein the radio frequency module is used for transmitting and receiving high-frequency signals. 5 . The RFID-based bridge fitting identification system according to claim 2 , wherein the control unit is used to control the transmission and reception of the radio frequency module, and to encrypt and decrypt the communication process between the radio frequency module and the tag chip. 6 . 6 . The RFID-based bridge fitting identification system according to claim 2 , wherein the data transmission interface is used to establish a connection channel between the control unit and the application layer of the main board. 7 . 7. The RFID-based bridge fitting identification system according to claim 1, wherein the passive tag module comprises a tag chip and a passive tag antenna, and the tag chip and the tag chip antenna are supplied by a high-frequency signal. can. 8. The RFID-based bridge fitting identification system according to claim 7, wherein the passive tag antenna is used for wirelessly transmitting tag information.

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