Composite antenna

Abstract

The composite antenna provided by the invention is a 9MHz antenna based on an A5 interface of a general transponder message read-write tool, and comprises an 8-shaped antenna, a half-8-shaped single-ring rectangular antenna and a polygonal antenna, the antenna comprises an antenna unit and a switching control unit, the antenna unit is responsible for outputting a 9MHz antenna signal, and the switching control unit converts a command of a tool mainboard into a digital signal, controls a switching unit and realizes selection of an antenna loop; the antenna loop is selected in three modes: an 8-shaped antenna, a polygonal antenna and a half of a single-ring rectangular antenna of the 8-shaped antenna; the A5 interface function of a general transponder message read-write tool is realized for transponders with 8-shaped single-loop antennas and polygonal single-loop antennas. The 9 MHz antenna has the technical advantages that the 9 MHz antenna of a transponder message read-write tool is compatible with antennas of various types of transponders, the problem of diversification of the 9 MHz antenna is solved, and related functions of message writing, reading and rewriting are completed.

Description

Technical Field

[0001] The invention relates to a 9MHz antenna for a transponder message reading and writing tool, and in particular to the design and application of a 9MHz composite antenna for a reading and writing tool for transponders of multiple manufacturers and models. Background Art

[0002] The transponder is a key infrastructure in the modern railway communication signal system, and plays an important role in ensuring the safety of train operation and improving transportation efficiency. With the increase in the mileage of railway and subway lines, the types and quantity of transponder products are increasing. Since there is no unified standard for the A5 read and write interface of the transponder message, and the 9MHz antenna interface of qualified transponder manufacturers is different, on-site maintenance requires the use of special read and write tools provided by the transponder manufacturer, which brings great inconvenience to on-site operation and maintenance work.

[0003] The present invention proposes a 9 MHz composite antenna compatible with transponders of various manufacturers and models, which realizes the compatibility of the 9 MHz antenna of the transponder message reading and writing tool with the 9 MHz antenna of various types of transponders, reduces the on-site operation and maintenance investment, and provides a strong guarantee for the use and maintenance of transponder equipment. Summary of the invention

[0004] The present invention provides a 9 MHz composite antenna compatible with transponders of various manufacturers and models.

[0005] The present invention proposes a composite antenna, which is a 9MHz antenna based on the universal transponder message reading and writing tool A5 interface. The 9MHz antenna can realize the functions of communication and energy transfer.

[0006] The composite antenna comprises: an 8-shaped antenna, a single-loop rectangular antenna that is half of the 8-shaped antenna, and a polygonal antenna;

[0007] The antenna comprises an antenna unit and a switching control unit.

[0008] The antenna comprises an antenna unit and a switching control unit.

[0009] The antenna unit is responsible for outputting 9MHz antenna signals.

[0010] The switching control unit converts the command of the universal transponder message reading and writing tool main board into a digital signal, controls the switching unit, and realizes the selection of the antenna loop;

[0011] There are three ways to select the antenna loop: an 8-shaped antenna, a polygonal antenna, and a single-loop rectangular antenna that is half of the 8-shaped antenna;

[0012] The composite antenna realizes the A5 interface function of the universal transponder message reading and writing tool for transponders with "8"-shaped single-loop antennas and polygonal single-loop antennas.

[0013] The technical advantages of the present invention are as follows: the 9MHz antenna of the transponder message reading and writing tool is compatible with the 9MHz antennas of various types of transponders, the problem of 9MHz antenna diversity is solved, and the functions related to message writing, reading and rewriting are completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the structural diagram of the 9MHz composite antenna system;

[0015] Figure 2 Schematic diagram of 9MHz antenna of A5 interface of various transponder models;

[0016] Figure 3 This is a schematic diagram of the 9MHz interface antenna between the reading and writing tool and the transponder of the invention scheme 1;

[0017] Figure 4 This is a schematic diagram of the 9MHz interface antenna between the reading and writing tool and the transponder of Invention Solution 2;

[0018] Figure 5 This is a schematic diagram of the 9MHz interface antenna between the reading and writing tool and the transponder of Invention Solution 3; DETAILED DESCRIPTION

[0019] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, without departing from the inventive concept, several variations and improvements may be made, which all belong to the protection scope of the present invention.

[0020] This application is based on a 9MHz composite antenna with an A5 interface under a universal transponder message reading and writing tool (hereinafter referred to as the reading and writing tool). The antenna includes an antenna unit and a switching control unit. The system is composed as follows: Figure 1 shown.

[0021] The antenna signal is a 9 MHz signal with driving capability after the 9 MHz small signal is amplified. The antenna signal can drive the antenna unit.

[0022] The control signal is that the host board of the universal message reading and writing tool controls the generation of different level control signals according to transponders of different manufacturers to realize the control of the switching control unit.

[0023] The antenna unit is responsible for outputting 9MHz antenna signals and includes two types of antenna loops: figure-8 antenna and polygonal antenna. The 9MHz antenna can realize the functions of communication and energy transfer;

[0024] The switching control unit converts the command of the universal message reading and writing tool mainboard into a digital signal, controls the switching unit, and realizes the selection of the antenna loop. There are three ways to select the antenna loop: an 8-shaped antenna, a polygonal antenna, and a rectangular antenna with half the shape of an 8.

[0025] This solution is implemented through the following key technologies:

[0026] 1) Composite antenna compatibility design

[0027] The A5 interface includes two antennas, 27MHz and 9MHz. The 27MHz antenna adopts the standard A4 interface antenna specified by the railway standard. The present invention will not repeat it in detail. The compatibility design and application of the 9MHz composite antenna are the core of the present invention. The A5 interface 9MHz antenna of the transponder can be divided into two categories according to its shape and characteristics: the "8" single-loop antenna and the polygonal single-loop antenna. Figure 2 shown.

[0028] Model 1 transponder can realize A5 interface function by using figure 8 9MHz antenna and 27MHz antenna;

[0029] Model 2 transponder can achieve communication and energy transfer through polygonal single-loop 9MHz antenna, realizing A5 interface function;

[0030] The A5 interface 9MHz transmitting antenna of the universal transponder message reading and writing tool should meet the requirements of on-site maintenance work for different types of transponders. The composite antenna is invented, which includes: an 8-shaped antenna, a single-loop antenna with half of the 8-shaped shape, and a polygonal antenna. The following method is specifically adopted to achieve compatibility of the universal message reading and writing tool.

[0031] 9MHz antenna implementation solution 1: Use the host board of the universal message reading and writing tool to control the switching circuit and only use the 8-shaped antenna. Figure 2 For transponder model 1, a universal message reading and writing tool needs to be placed in the electrical center of the transponder for use.

[0032] For model 1 transponders, the universal message reading and writing tool controls the 9MHz figure-8 antenna to provide energy and communication, writes message data, or uses the figure-8 antenna as a trigger signal and cooperates with the 27MHz antenna to write message data, and uses the 27MHz and 4MHz antennas to read and verify; for model 2 transponders, the universal message reading and writing tool is used as Figure 3As shown in the placement, half of the 8-shaped 9MHz antenna is coupled to the transponder, and the universal message reading and writing tool controls the 9MHz antenna to provide energy and communication, writes the message data, and uses the 27MHz and 4MHz antennas to read and verify.

[0033] 9MHz antenna design solution 2: The switching circuit is controlled by the host board of the universal message reader and writer. Through the design of the switching circuit, only half of the 8-shaped antenna is used. Under the premise of ensuring sufficient antenna output energy, the universal message reader and writer is placed in the electrical center of the transponder to achieve the coupling requirements with the 8-shaped antenna and the polygonal antenna. Figure 2 The coupling between the figure-8 antenna of the reading and writing tool and the figure-8 receiving antenna of the transponder is satisfied. The specific use process is described in Scheme 1. The coupling state between half of the figure-8 antenna of the reading and writing tool and the polygonal receiving antenna of the transponder is as follows: Figure 4 As shown:

[0034] 9MHz antenna design solution 3: includes 8-shaped antenna and polygonal antenna, and controls the switching circuit through the host board of the universal message reading and writing tool to adapt to different transponders. Place the reading and writing tool at the electrical center of the transponder. For model 1 transponder, enable the use of the 8-shaped antenna of the reading and writing tool, and align the 8-shaped antenna of the reading and writing tool with the 8-shaped antenna of the transponder. For details, see the description in solution 1. For model 2 transponder, the reading and writing tool controls the switching circuit, enables the polygonal antenna to couple with the polygonal receiving antenna of the transponder, controls the 9MHz antenna to provide energy and communication, writes the message data, and uses the 27MHz and 4MHz antennas to read and verify. The layout is shown below. Figure 5 shown.

[0035] Through the above compatibility design, the universal transponder message reading and writing tool 9MHz antenna can be compatible with various types of transponders in reading, writing and rewriting messages.

[0036] The technical advantages of the present invention are:

[0037] It does not increase the equipment configuration, reduces the maintenance and management of equipment production, and realizes the compatibility of reading and writing tools.

[0038] The above embodiments are provided to persons familiar with the art to implement or use the present invention. Personnel familiar with the art may make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention, and these modifications or changes all fall within the protection scope of the present invention.

Claims

1. A composite antenna, which is a 9MHz antenna based on the universal transponder message reading and writing tool A5 interface, the 9MHz antenna can realize the functions of communication and energy transfer, The composite antenna comprises: an 8-shaped antenna, a single-loop rectangular antenna that is half of the 8-shaped antenna, and a polygonal antenna; The antenna comprises an antenna unit and a switching control unit. The antenna comprises an antenna unit and a switching control unit. The antenna unit is responsible for outputting 9MHz antenna signals. The switching control unit converts the command of the universal transponder message reading and writing tool main board into a digital signal, controls the switching unit, and realizes the selection of the antenna loop; There are three ways to select the antenna loop: an 8-shaped antenna, a polygonal antenna, and a single-loop rectangular antenna that is half of the 8-shaped antenna; The composite antenna realizes the A5 interface function of the universal transponder message reading and writing tool for transponders with "8"-shaped single-loop antennas and polygonal single-loop antennas.

2. The composite antenna according to claim 1, characterized in that: For a transponder with an 8-shaped single-loop antenna, the switching control unit is controlled by the host board of the universal transponder message reading and writing tool, and only the 8-shaped antenna is used, and the universal transponder message reading and writing tool is placed in the electrical center of the transponder for use; The tool controls the 9MHz figure-8 antenna to provide energy and communication, write message data, or the figure-8 antenna acts as a trigger signal and cooperates with the 27MHz antenna to write message data, and uses the 27MHz and 4MHz antennas to read and verify.

3. The composite antenna according to claim 1, characterized in that: For a transponder with a polygonal single-loop antenna, the tool is offset so that half of the figure-8 9MHz antenna is coupled to the transponder. The tool controls the 9MHz antenna to provide energy and communication, write message data, and use the 27MHz and 4MHz antennas to read and verify.

4. The composite antenna according to claim 1, characterized in that: The switching control unit is controlled by the main board of the tool. Through the design of the switching circuit, only a single-loop rectangular antenna that is half of the 8-shaped antenna is used. Under the premise of ensuring that the antenna output energy is sufficient, the universal message reading and writing tool is placed in the electrical center of the transponder to achieve the receiving coupling requirements with the 8-shaped antenna and the polygonal antenna.

5. The composite antenna according to claim 1, characterized in that: Place the tool at the electrical center of the transponder. For transponders with different antennas, control the switching control unit to select the 8-shaped antenna or polygonal antenna of the composite antenna to couple it with the receiving antenna of the transponder, control the 9MHz antenna to provide energy and communication, write message data, and use the 27MHz and 4MHz antennas to read and verify.

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