Combined vehicle antenna and cold chain logistics vehicle using the same

Abstract

The application provides a combined vehicle-mounted antenna, which comprises a three-axis magnetic antenna and a dual-polarized antenna, the three-axis magnetic antenna comprises a third magnetic antenna and mutually orthogonal first and second magnetic antennas; the dual-polarized antenna comprises a feeding network and a patch antenna; the vehicle-mounted antenna further comprises an upper PCB board for etching processing of the patch antenna and providing support for the third magnetic antenna, a lower PCB board and a metal layer for etching processing of the feeding network and providing support for the first and second magnetic antennas, and the combined vehicle-mounted antenna has the advantages of compact structure and small volume. The application further provides a cold-chain logistics vehicle, which is used for sending node information of the cold-chain logistics vehicle to the cloud to realize whole-process monitoring of the cold chain, the cold-chain logistics vehicle is provided with a vehicle-mounted terminal, the vehicle-mounted terminal comprises a combined vehicle-mounted antenna, and at least one cold-chain box provided with a sensing node is arranged in the cold-chain logistics vehicle. The cold-chain logistics vehicle can improve the accuracy of cold-chain monitoring.

Description

Technical Field

[0001] This invention belongs to the field of vehicle-mounted antenna technology, specifically relating to a combined vehicle-mounted antenna and a cold chain logistics vehicle using the antenna. Background Technology

[0002] Most vehicle-mounted antennas used for magnetic induction communication are magnetic antennas, consisting of two sets of unconnected coils wound around a magnetic rod. Their function is to receive electromagnetic waves from space. Magnetic antennas have good directivity, making the sound loudest when the radio is rotated in a certain direction while reducing noise. A key characteristic is that the loaded magnetic material has a certain permeability and dielectric constant.

[0003] With the continuous development of intelligent cold chain logistics, it is necessary to achieve full-process cold chain monitoring during cold chain transportation to avoid damage and deterioration of transported goods in the vehicle due to environmental and other issues. Currently, most existing intelligent cold chain logistics vehicles use RFID technology for cold chain logistics tag design. Traditional RFID radio frequency identification systems are often made of multi-turn planar coils. In order to improve the efficiency of the receiver, the cross-section of the coil is large. Moreover, due to the limitations of directionality and sensing distance, the transmitting coil is used for point-to-point data exchange at extremely short distances.

[0004] Therefore, it is necessary to improve the structural design of the communication identification system, i.e., the vehicle-mounted antenna, reduce the structural size, and improve the omnidirectionality and sensing distance of the vehicle-mounted antenna; in addition, it is also necessary to improve the way information is collected and transmitted by cold chain logistics vehicles. Summary of the Invention

[0005] In view of the above-mentioned problems in the prior art, the purpose of the present invention is to provide a combined vehicle-mounted antenna and a cold chain logistics vehicle using the antenna.

[0006] A combined vehicle-mounted antenna includes a triaxial magnetic antenna and a dual-polarized antenna, wherein the triaxial magnetic antenna includes...

[0007] A first magnetic antenna and a second magnetic antenna are orthogonal to each other, and the first magnetic antenna and the second magnetic antenna constitute a magnetic field in the X-axis direction and a magnetic field in the Y-axis direction, respectively.

[0008] The third magnetic antenna is used to form a magnetic field in the Z-axis direction;

[0009] The dual-polarized antenna includes at least two ports for receiving and transmitting mobile communication signals.

[0010] A power supply network layer, comprising a power supply network for receiving electrical signals from the device and transmitting them to the antenna vibrator circuitry;

[0011] The radiating layer, including patch antennas, is used to generate electromagnetic radiation;

[0012] The vehicle-mounted antenna also includes

[0013] The PCB board is used for etching the patch antenna and to provide structural support for the third magnetic antenna.

[0014] The lower PCB board is used for etching the feed network and providing structural support for the first and second magnetic antennas;

[0015] The metal layer is used to isolate the vehicle antenna from the external circuitry and to support the lower PCB board.

[0016] The third magnetic antenna is located outside the patch antenna, while the first and second magnetic antennas are located outside the feed network.

[0017] To construct a combined vehicle-mounted antenna structure, at least one metal rod runs through the upper PCB board and the lower PCB board, and the patch antenna is connected to the feed network through the metal rod.

[0018] To reduce AC resistance loss and increase the resonant circuit current, the third magnetic antenna includes a multi-turn loop coil, wherein the number of turns of the multi-turn loop coil is at least forty strands.

[0019] To facilitate resonant circuit matching, the first and second magnetic antennas each include a ferrite rod antenna, and the inductance of the first, second, and third magnetic antennas is the same.

[0020] The port includes a differential feed circuit to improve the isolation between the received and transmitted signals of the dual-polarized antenna.

[0021] To reduce spatial coupling and enhance their respective radiation capabilities, the distance between the third magnetic antenna and the patch antenna is greater than 10 mm.

[0022] A cold chain logistics vehicle is provided for transmitting node information of the cold chain logistics vehicle to the cloud via magnetic induction communication to achieve full-process monitoring of the cold chain. The cold chain logistics vehicle is equipped with an on-board terminal, which includes a combined on-board antenna as described above for communication transmission. The interior of the cold chain logistics vehicle contains at least one cold chain box for loading goods. The cold chain box is equipped with a sensing node for monitoring information at corresponding locations within the cold chain logistics vehicle and communicating with the on-board terminal via magnetic induction.

[0023] In order to collect and transmit information, the sensing node includes

[0024] The monitoring module includes a temperature and humidity acquisition device for collecting temperature and humidity information inside the cold chain box;

[0025] The communication module is used to transmit the information collected by the temperature and humidity sensor to the vehicle terminal.

[0026] The beneficial effects of this invention are:

[0027] The combined vehicle-mounted antenna proposed in this invention,

[0028] 1. A triaxial magnetic antenna composed of a third magnetic antenna and two mutually orthogonal first and second magnetic antennas can generate magnetic fields in the X, Y and Z directions in space. This triaxial magnetic antenna effectively combines two magnetic antenna structures, achieving the goal of compact structure and reasonable magnetic field distribution.

[0029] 2. The dual-polarized antenna and the triaxial magnetic antenna are integrated into a combined vehicle antenna structure between the upper and lower PCB boards. This reduces the size of the vehicle antenna while ensuring the high radiation capability of both magnetic induction communication and mobile communication antennas.

[0030] Based on the aforementioned combined vehicle-mounted antenna, the cold chain logistics vehicle proposed in this invention...

[0031] 1. By configuring multiple sensor nodes on the cold chain boxes, high-precision and three-dimensional temperature and humidity monitoring of cold chain logistics can be achieved, avoiding the drawbacks of inaccurate temperature and humidity information collection from a single cold chain sensor.

[0032] 2. It improves the existing methods of cold chain monitoring information collection and transmission. Relying on sensor nodes for information collection and magnetic induction communication, it can better penetrate cold chain boxes, reduce the adsorption of electromagnetic waves by the environment or materials such as ice and metal, improve the link stability between sensor nodes and vehicle terminals, effectively transmit temperature and humidity information to vehicle terminals, and send logistics process data to the cloud through communication technology, so as to achieve the goal of full-chain process visibility and source traceability of cold chain logistics. Attached Figure Description

[0033] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0034] Figure 1 This is a schematic diagram of the combined vehicle-mounted antenna of the present invention;

[0035] Figure 2 This is a top view of the combined vehicle-mounted antenna of the present invention;

[0036] Figure 3 This is a structural schematic diagram of the cold chain logistics vehicle of the present invention.

[0037] The following are labeled in the diagram: 1. First magnetic antenna; 2. Second magnetic antenna; 3. Third magnetic antenna; 4. Patch antenna; 5. Upper PCB board; 6. Lower PCB board; 7. Feed network; 8. Metal layer; 9. Metal rod. Detailed Implementation

[0038] like Figure 1 As shown, a combined vehicle-mounted antenna includes a triaxial magnetic antenna and a dual-polarized antenna. The triaxial magnetic antenna is a low-frequency magnetic antenna, and the dual-polarized antenna is a 5G antenna. The triaxial magnetic antenna includes a first magnetic antenna 1 and a second magnetic antenna 2 that are orthogonal to each other. The first magnetic antenna 1 and the second magnetic antenna 2 respectively form a magnetic field in the X-axis direction and a magnetic field in the Y-axis direction. The triaxial magnetic antenna also includes a third magnetic antenna 3, which is used to form a magnetic field in the Z-axis direction.

[0039] The third magnetic antenna 3 includes a multi-turn loop coil, with at least forty turns, in order to reduce AC resistance loss and improve the resonant circuit.

[0040] The first magnetic antenna 1 and the second magnetic antenna 2 each include a magnetic rod antenna. The first magnetic antenna 1, the second magnetic antenna 2 and the third magnetic antenna 3 have the same inductance in order to facilitate resonant circuit matching.

[0041] A triaxial magnetic antenna is formed by the first magnetic antenna 1, the second magnetic antenna 2, and the third magnetic antenna 3. This not only enables the generation of magnetic fields in the X, Y, and Z axes in space, but also effectively combines two types of magnetic antenna structures, reducing the volume of the triaxial magnetic antenna. This effectively improves the problems of large size of low-frequency magnetic induction multi-axis antennas and the difficulty in designing combinations of low-frequency magnetic antennas and 5G antennas.

[0042] like Figure 1 As shown, the dual-polarized antenna includes at least two ports for receiving and transmitting mobile communication signals. Each port includes a differential feed circuit to improve the isolation between the received and transmitted signals of the dual-polarized antenna. The impedance of the differential feed circuit can be 50 ohms.

[0043] like Figure 1 As shown, the dual-polarized antenna includes a feed network layer, which includes a feed network 7 for receiving electrical signals from the device and transmitting them to the antenna element circuit.

[0044] like Figure 1 As shown, the dual-polarized antenna includes a radiating layer, which includes a patch antenna 4 for generating electromagnetic radiation.

[0045] like Figure 1 and Figure 2As shown, the vehicle-mounted antenna also includes an upper PCB board 5 for etching the patch antenna 4, an upper PCB board 5 for providing structural support for the third magnetic antenna 3, an upper PCB board 6 for etching the feed network 7, a lower PCB board 6 for providing structural support for the first magnetic antenna 1 and the second magnetic antenna 2, and a metal layer 8 for isolating the vehicle-mounted antenna from the peripheral circuit and supporting the lower PCB board 6; at least one metal rod 9 passes through the upper PCB board 5 and the lower PCB board 6, and the patch antenna 4 is connected to the feed network 7 through the metal rod 9.

[0046] like Figure 1 and Figure 2 As shown, the third magnetic antenna 3 is located outside the patch antenna 4, and the first magnetic antenna 1 and the second magnetic antenna 2 are located outside the feed network 7.

[0047] The distance between the third magnetic antenna 3 and the patch antenna 4 is greater than 10 mm in order to reduce spatial coupling and improve the radiation capability of the third magnetic antenna 3 and the patch antenna 4.

[0048] A dual-polarized antenna structure is formed by connecting the power supply network 7, patch antenna 4, metal rod, upper PCB board, lower PCB board and metal plate 6 to realize 5G communication and complete information transmission.

[0049] like Figure 3 As shown, a cold chain logistics vehicle is used to send node information of the cold chain logistics vehicle to the cloud via magnetic induction communication to realize full-process monitoring of the cold chain. The vehicle communicates with sensor nodes via magnetic induction through an onboard terminal, sending node temperature and humidity information and interior temperature distribution information of the cold chain vehicle to the cloud. The cold chain logistics vehicle is equipped with an onboard terminal, which includes the aforementioned combined onboard antenna for communication transmission. At least one cold chain box is placed inside the cold chain logistics vehicle for loading goods. Sensor nodes are configured inside the cold chain box to monitor information at corresponding locations within the cold chain logistics vehicle and communicate magnetically with the onboard terminal.

[0050] To achieve magnetic induction communication, the sensing node includes a monitoring module. The monitoring module includes a temperature and humidity collector for collecting temperature and humidity information inside the cold chain box and a communication module for transmitting the information collected by the temperature and humidity collector to the vehicle terminal. The temperature and humidity collector collects the temperature and humidity at each location of the cold chain box in the cold chain logistics vehicle. In addition, the temperature distribution inside the vehicle can be analyzed through the information monitored by multiple sensing nodes. Then, the signal is transmitted to the vehicle terminal through the communication module, which can achieve high-efficiency and low-latency monitoring of the cold chain system.

[0051] The working principle of this cold chain logistics vehicle using a combined vehicle-mounted antenna is as follows: the goods to be transported by cold chain are loaded into the cold chain box. During the transportation process of the cold chain logistics vehicle, the temperature and humidity information of the corresponding location is monitored in real time by the temperature and humidity acquisition device of the sensing node in the cold chain box. The information is transmitted through magnetic induction communication between the communication module and the vehicle-mounted antenna. The received information is then sent to the cloud by the vehicle-mounted antenna to facilitate the whole process monitoring of cold chain logistics.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A cold chain logistics vehicle, used to transmit node information of the cold chain logistics vehicle to the cloud via magnetic induction communication to achieve full-process monitoring of the cold chain, characterized in that, The cold chain logistics vehicle is equipped with a vehicle-mounted terminal, which includes a combined vehicle-mounted antenna for communication transmission. The interior of the cold chain logistics vehicle contains at least one cold chain box for loading goods. The cold chain box is equipped with a sensing node for monitoring information at the corresponding location inside the cold chain logistics vehicle and communicating with the vehicle-mounted terminal via magnetic induction. The combined vehicle-mounted antenna includes a triaxial magnetic antenna and a dual-polarized antenna, wherein the triaxial magnetic antenna includes: The first magnetic antenna (1) and the second magnetic antenna (2) are orthogonal to each other. The first magnetic antenna (1) and the second magnetic antenna (2) respectively constitute the magnetic field in the X-axis direction and the magnetic field in the Y-axis direction. The third magnetic antenna (3) is used to form a magnetic field in the Z-axis direction; The dual-polarized antenna includes at least two ports for receiving and transmitting mobile communication signals. The dual-polarized antenna includes: The feed network layer includes a feed network (7) for receiving electrical signals from the device and transmitting them to the antenna vibrator circuit. The radiating layer includes a patch antenna (4) for generating electromagnetic radiation; The vehicle-mounted antenna also includes: The upper PCB board (5) is used for etching the patch antenna (4) and to provide structural support for the third magnetic antenna (3); The lower PCB board (6) is used for etching the feed network (7) and to provide structural support for the first magnetic antenna (1) and the second magnetic antenna (2); Metal layer (8) is used to isolate the vehicle antenna from the peripheral circuit and to support the lower PCB board (6). The third magnetic antenna (3) is located outside the patch antenna (4), and the first magnetic antenna (1) and the second magnetic antenna (2) are located outside the feed network (7); At least one metal rod (9) runs through the upper PCB board (5) and the lower PCB board (6), and the patch antenna (4) is connected to the feed network (7) through the metal rod (9); The third magnetic antenna (3) includes a multi-turn loop coil, wherein the number of turns of the multi-turn loop coil is at least forty strands; The first magnetic antenna (1) and the second magnetic antenna (2) each include a ferrite rod antenna, and the inductance of the first magnetic antenna (1), the second magnetic antenna (2) and the third magnetic antenna (3) are the same; The port includes a differential feed circuit to improve the isolation between the received and transmitted signals of the dual-polarized antenna; The distance between the third magnetic antenna (3) and the patch antenna (4) is greater than 10 mm.

2. The cold chain logistics vehicle according to claim 1, characterized in that, The sensing nodes include The monitoring module includes a temperature and humidity acquisition device for collecting temperature and humidity information inside the cold chain box; The communication module is used to transmit the information collected by the temperature and humidity sensor to the vehicle terminal.

Images