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Vehicle-mounted TBOX, antenna real-time switching method and device thereof and readable storage medium

An antenna and vehicle-mounted technology, which is applied in the field of vehicle-mounted terminals, can solve problems such as communication system failure and real-time detection, and achieve the effect of avoiding permanent damage to radio frequency link devices and enhancing performance

Inactive Publication Date: 2020-04-07
SHANGHAI ZTE SOFTWARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With this detection scheme, the two-way coupler can only be used to detect the reflected wave signal when the control system issues the antenna reflected wave detection command, that is, real-time detection cannot be realized, and the communication system cannot work when the reflected wave is detected.

Method used

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  • Vehicle-mounted TBOX, antenna real-time switching method and device thereof and readable storage medium
  • Vehicle-mounted TBOX, antenna real-time switching method and device thereof and readable storage medium
  • Vehicle-mounted TBOX, antenna real-time switching method and device thereof and readable storage medium

Examples

Experimental program
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Effect test

Embodiment 1

[0063] Please refer to Figure 5 .

[0064] An embodiment of the present invention provides a vehicle-mounted TBOX that can switch antennas in real time. The vehicle-mounted TBOX includes: an MCU control device 10, an antenna device 20, a measurement device 30, a WWAN communication module 40, and a vehicle-mounted dedicated interface 50, wherein:

[0065] In this embodiment, the antenna device 20 includes a first antenna 201 , a second antenna 202 , and an antenna switch 203 . The measuring device 30 includes: a bidirectional coupler 301 , an attenuator 302 , a wave detector 303 , and a comparator 304 .

[0066] The WWAN communication module 40 is connected with the antenna switch 203, the MCU control device 10, and the vehicle-specific interface 50, and is used for the wireless communication function of the vehicle-mounted TBOX; the WWAN module 40 can be connected through the first An antenna 201 and the second antenna 202 realize the wireless communication function; in the...

Embodiment 2

[0086] Please refer to Image 6 . An embodiment of the present invention provides a method for real-time switching of a vehicle-mounted TBOX antenna, the method comprising:

[0087] Step S101, receiving the incident wave power and reflected wave power when the coupling antenna device is working;

[0088] Step S102, attenuating the received incident wave power and reflected wave power to obtain attenuated incident wave signals and reflected wave signals;

[0089] Step S103, detecting the attenuated incident wave signal and reflected wave signal, and outputting an output detection voltage including a forward detection output voltage and a reverse detection output voltage;

[0090] Step S104, subtracting the output detection voltage including the forward detection output voltage and the reverse detection output voltage to obtain a functional relationship corresponding to the reflection coefficient;

[0091] Step S105, determining the real-time standing wave ratio according to ...

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Abstract

The invention discloses a vehicle-mounted TBOX and an antenna real-time switching method and device thereof, and a readable storage medium, and belongs to the field of vehicle-mounted terminals. The vehicle-mounted TBOX comprises an MCU control device, an antenna device and a measuring device. The measuring device is used for detecting incident wave power and reflected wave power when the antennadevice works and determining the real-time standing-wave ratio at the position of the antenna device; the MCU control device is used for determining the working state of the antenna device according to the standing-wave ratio and sending a control instruction to the antenna device; and the antenna device is used for switching internal antennas of the antenna device in real time according to control instructions. According to the embodiment of the invention, the standing-wave ratio is monitored in real time by detecting the incident wave power and the reflected wave power, and a second antennais switched in time when a first antenna is abnormal, it is guaranteed that the function of the vehicle-mounted TBOX communication system is not affected in real time, the performance and higher reliability of the antenna system are enhanced, and permanent damage, caused by total power reflection, to a radio frequency link device is avoided.

Description

technical field [0001] The invention relates to the field of vehicle-mounted terminals, in particular to a vehicle-mounted TBOX (Telematics BOX) and its antenna real-time switching method, device and readable storage medium. Background technique [0002] The vehicle-mounted TBOX can read CAN (Controller Area Network, Controller Area Network) bus data and private protocols, and can transmit the data to the cloud server through the network, providing vehicle condition reports, driving records, fuel consumption statistics, fault reminders, violation inquiries, driving Behavior, location track and other information to the mobile APP, you can also use the mobile APP to remotely start the vehicle, turn on the air conditioner, adjust the seat and other actions through the network. [0003] Therefore, the WWAN (Wireless Wide Area Network, wireless wide area network) wireless communication module in the vehicle-mounted TBOX must have good antenna performance and higher reliability. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/00H04B7/06H04B7/08H04W4/40H04B1/3822
CPCH04B17/00H04B7/0602H04B7/0802H04W4/40H04B1/3822H04B7/0805H04B17/103H04B17/102H04B17/18
Inventor 李军
Owner SHANGHAI ZTE SOFTWARE CO LTD
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