Intelligent vehicle-mounted radar device for reducing signal interference

• US 10,838,041 B2
• Filed: 12/31/2017
• Issued: 11/17/2020
• Est. Priority Date: 12/28/2017
• Status: Active Grant

• Current Assignee: Guohui Hu
• Original Assignee: Guohui Hu
• Inventors: Jiang, Huan
• Primary Examiner(s): Windrich, Marcus E
• Application Number:
  US15/859,521
• Publication Number:
  US 20190204412A1
• Time in Patent Office: 1,052 Days
• CPC Class Codes: G01S 13/60 wherein the transmitter and receiver are mounted on the moving object, e.g. for determining ground speed, drift angle, ground track G01S13/64 takes precedence
• CPC Class Codes: G01S 13/931 of land vehicles
• CPC Class Codes: G01S 7/023 Interference mitigation, e.g. reducing or avoiding non-intentional interference with other HF-transmitters, base station transmitters for mobile communication or other radar systems, e.g. using electro-magnetic interference [EMI] reduction techniques auxiliary means for detecting or identifying radar signals or the like G01S7/021; means for anti-jamming G01S7/36
• CPC Class Codes: G01S 7/0231 Avoidance by polarisation multiplex
• CPC Class Codes: G01S 7/024 using polarisation effects in waveguides H01P1/165; for aerials H01Q, e.g. H01Q15/22, H01Q15/24, H01Q19/195
• CPC Class Codes: G01S 7/4004 of parts of a radar system

Abstract

Disclosed is an intelligent vehicle-mounted radar device for reducing signal interference, wherein, the antenna module includes a dual-polarized antenna, namely, any polarized signal can be measured, and polarization information can be processed and extracted in real time by the polarization digital processor module, the present invention is featured by rapid and real-time. In addition, when the local oscillation module is turned on, the first rectifier diode, the first switch module, the first resistor, the second resistor and the second rectifier diode make the current flowing through the local oscillation module rise gradually to suppress signal interference, and thus improve the performance of the intelligent vehicle-mounted radar device.

Claims

1. An intelligent vehicle-mounted radar device for reducing signal interference, comprising a transmitting unit for transmitting radar waves and a receiving unit for receiving radar waves transmitted from an external object;

wherein

the receiving unit comprises an antenna module, two microwave front-end modules, a local oscillation module, two intermediate frequency (IF) amplification modules, two analog-to-digital conversion modules, a memory module, a polarization digital processor module, a polarization control module, a first resistor, a second resistor, a first capacitor, a first rectifier diode, a second rectifier diode and a first switch module;

the antenna module and the local oscillation module are both connected to the two microwave front-end modules, the two microwave front-end modules are connected to the two IF amplification modules, respectively, the two IF amplification modules are connected to the two analog-to-digital conversion modules, respectively, the two analog-to-digital conversion modules are both connected to the memory module, the memory module is connected to the polarization digital processor module, the polarization control module is connected to the antenna module, the local oscillation module is connected to the first rectifier diode, the first switch module and the second rectifier diode, respectively, the first resistor is connected to the first rectifier diode, the second resistor, the first capacitor and the first switch module, respectively, one end of the first capacitor is connected to the first resistor, the first switch module and the second resistor, respectively, the other end of the first capacitor is connected to the second resistor, the first switch module and the second rectifier diode, respectively;

a radar wave signal is received by the antenna module, the received radar wave signal is selected by a corresponding microwave front-end module, amplified to an intermediate frequency (IF) signal via the IF amplification module, converted to a digital signal via a corresponding analog-to-digital conversion module, and cached via the memory module, and polarization information is extracted by the polarization digital processor module from information cached by the memory module, when the local oscillation module is turned on, the first rectifier diode, the first switch module, the first resistor, the second resistor and the second rectifier diode make the current flowing through the local oscillation module rise gradually to suppress signal interference.

2. The intelligent vehicle-mounted radar device for reducing signal interference according to claim 1, further comprising:

a vehicle speed detection trigger module, a rectifier module, a crystal triode, a third resistor, a fourth resistor, a second capacitor, and a second switch module, wherein, the vehicle speed detection trigger module is connected to the third resistor, the second capacitor and a base of the crystal triode, a collector of the crystal triode is connected to the fourth resistor and the second switch module, the second switch module is connected to the polarization control module via the rectifier module;

when detecting a vehicle speed is greater than a first preset value, the vehicle speed detection trigger module triggers the second capacitor to discharge, causing the base of the crystal triode to cut off and the collector potential to increase, and thereby controls ON of the second switch module, the polarization control module controls the antenna module to perform polarization calibration.

3. The intelligent vehicle-mounted radar device for reducing signal interference according to claim 2, wherein, the first switch module and the second switch module are both thyristors.