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WO2019127178A1 - 一种降低极化损耗的智能车载雷达装置 - Google Patents

一种降低极化损耗的智能车载雷达装置 Download PDF

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Publication number
WO2019127178A1
WO2019127178A1 PCT/CN2017/119234 CN2017119234W WO2019127178A1 WO 2019127178 A1 WO2019127178 A1 WO 2019127178A1 CN 2017119234 W CN2017119234 W CN 2017119234W WO 2019127178 A1 WO2019127178 A1 WO 2019127178A1
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module
polarization
vehicle
vehicle speed
modules
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English (en)
French (fr)
Inventor
蒋欢
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Guangzhou Xingpu Electronic Technology Co Ltd
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Guangzhou Xingpu Electronic Technology Co Ltd
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Priority to PCT/CN2017/119234 priority Critical patent/WO2019127178A1/zh
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/28—Details of pulse systems
    • G01S7/285—Receivers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/40—Means for monitoring or calibrating

Definitions

  • the present invention relates to the field of in-vehicle radar technology, and more particularly to an intelligent vehicle-mounted radar device that reduces polarization loss.
  • the vehicle radar device can measure and display the distance of the vehicle's external obstacles from the vehicle. The detection is quick and convenient, the calculation is simple, and it is easy to control in real time. However, how to better improve the performance of the intelligent vehicle-mounted radar device is a problem faced by the industry.
  • the embodiments of the present invention provide an intelligent vehicle-mounted radar device that partially or completely solves the above problems, which can effectively reduce the polarization loss of the intelligent vehicle-mounted radar device, thereby improving the performance of the intelligent vehicle-mounted radar device.
  • An intelligent vehicle-mounted radar apparatus for reducing polarization loss includes: a transmitting unit that transmits a radar wave and a receiving unit that receives a radar wave transmitted from an external object, wherein
  • the receiving unit includes an antenna module, two microwave front end modules, a local oscillator module, two intermediate frequency amplifying modules, two analog to digital conversion modules, a memory module, a polarized digital processor module, a polarization control module, and a vehicle speed detection trigger.
  • the antenna module and the local oscillator module are both connected to two microwave front end modules, and the two microwave front end modules are respectively connected to two intermediate frequency amplifying modules, and the two intermediate frequency amplifying modules are respectively connected to two analog to digital conversion modules.
  • 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, and the vehicle speed detection trigger module and the first resistor a first capacitor and a base of the transistor are connected, a collector of the transistor is connected to the second resistor and the second switch module, and the second switch module is connected to the polarization control module through a rectifier module;
  • the radar wave signal After receiving the radar wave signal, the radar wave signal is selected by the corresponding microwave front end module, and is converted to the intermediate frequency by the intermediate frequency amplification module, and converted into a digital signal by the corresponding analog-to-digital conversion module, and the polarization digital processor module is passed through the memory module buffer.
  • Polarization information is extracted from the information of the memory buffer, and the vehicle speed detection trigger module detects the vehicle When the speed is greater than the first predetermined value, triggering the first capacitor discharge causes the base of the transistor to be turned off, the collector potential to rise, thereby controlling the first switch module to be turned on, and the polarization control module controls the antenna module to perform polarization calibration .
  • the antenna module can adopt a dual-polarized antenna, that is, can measure an arbitrary polarization signal, and can process and extract polarization information in real time through a polarization digital processor module, which has a fast In real time, in addition, the vehicle radar device has a certain polarization loss when the vehicle is driving at a high speed.
  • the invention can adjust the polarization loss formed by the resonance interference when the vehicle is running at a high speed, that is, the vehicle speed is detected by the vehicle speed detection trigger module.
  • the polarization control module controls the antenna module to perform polarization calibration, thereby reducing the polarization loss of the smart vehicle radar device, thereby improving the performance of the intelligent vehicle radar device.
  • FIG. 1 is a schematic diagram of the composition of an intelligent vehicle-mounted radar device according to the present invention.
  • FIG. 2 is a block diagram showing the composition of a receiving unit in an intelligent vehicle-mounted radar device according to the present invention
  • FIG. 3 is a schematic diagram of a polarization control module for controlling a polarization control module in an intelligent vehicle-mounted radar device according to the present invention
  • Figure 4 is a schematic illustration of the prevention of signal interference in a local oscillator module in an intelligent vehicle-mounted radar apparatus of the present invention.
  • a schematic diagram of a composition of an intelligent vehicle-mounted radar apparatus includes: a transmitting unit 1 that transmits a radar wave and a receiving unit 2 that receives a radar wave transmitted from an external object.
  • the receiving unit 2 includes an antenna module 201, two microwave front end modules 202, a local oscillator module 203, two intermediate frequency amplifying modules 204, two analog to digital conversion modules 205, and a memory module 206.
  • the polarization digital processor module 207 and the polarization control module 208 in addition, referring to FIG.
  • the vehicle-mounted radar device of the present invention further includes a vehicle speed detection trigger module 209, a rectifier module 210, and a first The switch module 211, the transistor VT, the first resistor R1, the second resistor R2, the first capacitor C1;
  • the antenna module 201 and the local oscillator module 203 are both connected to two microwave front end modules 202, and the two microwave front end modules 202 are respectively connected to two intermediate frequency amplifying modules 204, and two intermediate frequency amplifying modules 204.
  • Two analog-to-digital conversion modules 205 are respectively connected, and two analog-to-digital conversion modules 205 are connected to the memory module 206.
  • the memory module 206 is connected to the polarization digital processor module 207, and the polarization control module 208 is
  • the antenna module 201 is connected to the base, and the vehicle speed detecting trigger module 209 is connected to the first resistor R1, the first capacitor C1, and the base of the transistor VT.
  • the collector of the transistor VT and the second resistor R2 are The first switch module 211 is connected, and the first switch module 211 is connected to the polarization control module 208 through the rectification module 210;
  • the antenna module 201 is configured to receive a radar wave signal transmitted from an external object
  • the microwave front end module 202 is configured to select a signal received by the antenna module 201 and mix the local oscillator signal transmitted from the local oscillator module 203 into an intermediate frequency.
  • the signal, the intermediate frequency amplifying module 204 performs intermediate frequency amplification on the signal sent from the microwave front end module 202
  • the analog to digital conversion module 205 performs analog to digital conversion on the intermediate frequency amplified signal, and the analog to digital converted digital signal information passes through the memory module.
  • the antenna module 201 can adopt a dual-polarized antenna for receiving left-handed rotation. Circularly polarized signals and right-handed circularly polarized signals are not described here.
  • the vehicle speed detecting trigger module 209 detects that the vehicle speed is greater than the first predetermined value, the first capacitor C1 is triggered to discharge, the base of the transistor VT is turned off, the collector potential is raised, and the first switch module is controlled. 211 is turned on, and the polarization control module 208 controls the antenna module 201 to perform polarization calibration.
  • the first predetermined value may determine a vehicle speed value that generates resonance interference according to different types of antenna tests, and no specific value is limited herein.
  • the first switch module 211 in the present invention may be a device in which a thyristor or the like is triggered by a trigger signal to trigger its control electrode.
  • the vehicle speed detection trigger module 209 may include: a vehicle speed detector. a module and a switch control submodule, wherein the vehicle speed detecting submodule detects a vehicle of a vehicle in which the vehicle radar device is located The switch control submodule controls charging and discharging of the first capacitor according to a vehicle speed detected by the vehicle speed detecting submodule.
  • the vehicle speed detection trigger module 209 when the vehicle speed is less than the second predetermined value, the vehicle speed detection trigger module 209 When the detected vehicle speed is less than the second predetermined value, the charging of the first capacitor is controlled to turn off the polarization calibration.
  • the control module works for a period of time.
  • the control can be realized by the charging time of the first resistor R1 and the first capacitor C1, that is, when the output terminal voltage of the rectifier module charges the first capacitor C1 through the first resistor R1.
  • the charging time is the working time of the polarization control module, in order to ensure that it can be realized at least once.
  • the polarization calibration of the first resistor R1 and the first capacitor C1 in the present invention is: at least one of the polarization control modules controls an interval period for performing polarization calibration to ensure that the polarization control module can also Work at least one complete calibration cycle, so I won't go into details here.
  • the present invention further includes a third resistor R3 and a fourth resistor.
  • the second capacitor C2 the first rectifier diode VD1, the second rectifier diode VD2, and the second switch module 212, taking the second switch module as a thyristor as an example, when the circuit of the local oscillator module is turned on, due to the characteristics of the capacitor
  • the voltage across the second capacitor C2 cannot be abrupt, that is, the voltage across the second capacitor C2 is zero, and the thyristor as the second switch module 212 is turned off because there is no trigger voltage. Therefore, the current through the local oscillator module is passed through the second rectification.
  • the second capacitor C2 is charged by the first rectifier diode VD1 and the third resistor R3.
  • the voltage across the second capacitor C2 rises to the second switch module 212.
  • the turn-on level of the thyristor is turned on as the thyristor of the second switch module 212, that is, the current gradually rises, the influence of the sudden change of the current is small, and the signal interference to the local oscillator module is reduced.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

本发明公开了一种降低极化损耗的智能车载雷达装置，其天线模块可以采用双极化天线，即可以测量任意极化的信号，并且通过极化数字处理器模块实时处理和提取极化信息，具有快速实时的特点，另外，车辆在高速行驶时车载雷达装置会有一定的极化损耗，本发明可以在车辆高速行驶时针对共振干扰形成的极化损耗进行调整，即通过车速检测触发模块检测车速，当车速达到形成共振干扰的第一预定值时，由极化控制模块控制天线模块进行极化校准，从而降低智能车载雷达装置的极化损耗，进而提高智能车载雷达装置的性能。

Description

一种降低极化损耗的智能车载雷达装置 技术领域
本发明涉及车载雷达技术领域，更具体的说，本发明涉及一种降低极化损耗的智能车载雷达装置。
背景技术
随着车联网技术的发展，车载雷达技术应用空间越来越大，例如，高速公路上车辆繁多，各种意外情况经常发生，通过车载雷达装置能测量并显示汽车外部障碍物离汽车的距离，检测迅速、方便，计算简便，易于实时控制，但如何更好的提高智能车载雷达装置的性能是业界面临的问题。
发明内容
鉴于上述问题，本发明实施例提供了一种部分或全部解决上述问题的智能车载雷达装置，可以有效降低智能车载雷达装置的极化损耗，进而可提高智能车载雷达装置的性能。
为了解决上述技术问题，本申请采用如下技术方案：
根据本发明实施例的一种降低极化损耗的智能车载雷达装置，其包括：发送雷达波的发送单元和接收从外部对象发射的雷达波的接收单元，其中
所述接收单元包括有天线模块、两个微波前端模块、本振模块、两个中频放大模块、两个模数转换模块、存储器模块、极化数字处理器模块、极化控制模块、车速检测触发模块、整流模块、晶体三极管、第一电阻、第二电阻、第一电容、第一开关模块；
所述天线模块和所述本振模块均与两个微波前端模块相连，所述两个微波 前端模块分别与两个中频放大模块相连，两个中频放大模块分别与两个模数转换模块相连，两个模数转换模块均与存储器模块相连，所述存储器模块与极化数字处理器模块相连，所述极化控制模块与所述天线模块相连，所述车速检测触发模块与所述第一电阻、第一电容以及晶体三极管的基极相连，所述晶体三极管的集电极与所述第二电阻和第二开关模块相连，所述第二开关模块通过整流模块与极化控制模块相连；接收的雷达波信号通过天线模块接收后经由相应的微波前端模块进行天线信号选择，经中频放大模块变换到中频，由相应的模数转换模块变为数字信号，通过存储器模块缓存，极化数字处理器模块对存储器缓存的信息进行极化信息的提取，当车速检测触发模块检测到车速大于第一预定值时，触发所述第一电容放电使所述晶体三极管的基极截止、集电极电位上升进而控制第一开关模块导通，由极化控制模块控制天线模块进行极化校准。
根据本发明实施例的一种智能车载雷达装置，其天线模块可以采用双极化天线，即可以测量任意极化的信号，并且通过极化数字处理器模块实时处理和提取极化信息，具有快速实时的特点，另外，车辆在高速行驶时车载雷达装置会有一定的极化损耗，本发明可以在车辆高速行驶时针对共振干扰形成的极化损耗进行调整，即通过车速检测触发模块检测车速，当车速达到形成共振干扰的第一预定值时，由极化控制模块控制天线模块进行极化校准，从而降低智能车载雷达装置的极化损耗，进而提高智能车载雷达装置的性能。
附图说明
图1是本发明一种智能车载雷达装置的组成示意图；
图2是本发明一种智能车载雷达装置中接收单元的组成框图；
图3是本发明一种智能车载雷达装置中控制极化控制模块进行极化校准的示意图；
图4是本发明一种智能车载雷达装置中防止本振模块中信号干扰的示意 图。
具体实施方式
参考图1，本发明实施例的智能车载雷达装置的组成示意图，其包括：发送雷达波的发送单元1和接收从外部对象发射的雷达波的接收单元2，参考图2，为了实现极化信息的提取，作为一个具体实施例，所述接收单元2包括有天线模块201、两个微波前端模块202、本振模块203、两个中频放大模块204、两个模数转换模块205、存储器模块206、极化数字处理器模块207、极化控制模块208，另外，参考图3，为了实现极化干扰的控制，本发明的车载雷达装置中还包括车速检测触发模块209、整流模块210、第一开关模块211、晶体三极管VT、第一电阻R1、第二电阻R2、第一电容C1；
具体实现时，所述天线模块201和所述本振模块203均与两个微波前端模块202相连，所述两个微波前端模块202分别与两个中频放大模块204相连，两个中频放大模块204分别与两个模数转换模块205相连，两个模数转换模块205均与存储器模块206相连，所述存储器模块206与极化数字处理器模块207相连，所述极化控制模块208与所述天线模块201相连，而所述车速检测触发模块209与所述第一电阻R1、第一电容C1以及晶体三极管VT的基极相连，所述晶体三极管VT的集电极与所述第二电阻R2和第一开关模块211相连，所述第一开关模块211通过整流模块210与极化控制模块208相连；
具体工作时，天线模块201用于接收从外部对象发射的雷达波信号，微波前端模块202用于对天线模块201接收来的信号进行选择并与本振模块203传来的本振信号混合为中频信号，中频放大模块204对微波前端模块202发来的信号进行中频放大，而模数转换模块205对中频放大后的信号进行模数转换为数字信号，模数转换后的数字信号信息通过存储器模块206缓存，而极化数字处 理器模块207，而极化数字处理器模块207则对存储器模块206缓存的信息进行极化信息的提取，其中天线模块201可采用双极化天线，用于接收左旋圆极化信号和右旋圆极化信号，这里不再赘述。
需要说明的，当车速大于一定值时，很容易使车载雷达装置的天线形成共振，即对车载雷达装置的天线形成共振干扰，从而降低极化损耗，导致提取的极化信息偏差，为了解决该问题，本发明中当车速检测触发模块209检测到车速大于第一预定值时，触发所述第一电容C1放电使所述晶体三极管VT的基极截止、集电极电位上升进而控制第一开关模块211导通，由极化控制模块208控制天线模块201进行极化校准，具体实现时，第一预定值可根据不同类型的天线测试确定产生共振干扰的车速值，这里不做具体值的限定，另外，本发明中所述第一开关模块211可采用晶闸管等通过触发信号触发其控制极而导通的器件，另外，作为一个具体实施例，所述车速检测触发模块209可包括：车速检测子模块和开关控制子模块，所述车速检测子模块检测车载雷达装置所在车辆的车速，所述开关控制子模块根据所述车速检测子模块检测的车速控制所述第一电容的充放电。
需要说明的，当车速小于一定值时，共振干扰影响较小，即极化损耗也基本没有影响，需要关闭极化校准，本发明中当车速小于第二预定值时，即车速检测触发模块209检测车速小于第二预定值时，控制所述第一电容的充电，以关闭极化校准，但具体实现时，虽然车速已降低，但有可能共振干扰会持续一定时间，即还需要保持极化控制模块工作一段时间，为此，本发明中可通过第一电阻R1和第一电容C1的充电时间来实现控制，即当整流模块的输出端电压通过第一电阻R1对第一电容C1进行充电，当第一电容C1两端上的电压上升到足以使晶体三极管VT重新导通时，作为第一开关模块的晶闸管的控制极重新等效接地，无触发电压，即作为第一开关模块的晶闸管关断，极化控制模块不再工作，即充电时间即是极化控制模块的工作时间，为了保证可以实现至少一次完整的极化校准，本发明中所述第一电阻R1和第一电容C1的充电时间为：至少一个所述极化控制模块控制进行极化校准的间隔周期，以保证极化控制模块还可以工作一个至少一个完整的校准周期，这里不再赘述。
另外，参考图4，本振模块203在启动时，由于电路中电流突变，会对本振模块203形成较大的信号干扰，为了解决该问题，本发明中还包括第三电阻R3、第四电阻R4、第二电容C2、第一整流二极管VD1、第二整流二极管VD2和第二开关模块212，以第二开关模块为晶闸管为例，当本振模块所在的电路接通时，由于电容的特性，第二电容C2两端的电压不能突变，即第二电容C2两端的电压为零，作为第二开关模块212的晶闸管因为无触发电压而截至，因此，通过本振模块的电流是通过第二整流二极管VD2整流后的半波电流，此时，第二电容C2经第一整流二极管VD1与第三电阻R3充电，延迟一定时间后，第二电容C2两端电压上升到作为第二开关模块212的晶闸管的开启电平，作为第二开关模块212的晶闸管导通，即电流逐渐上升，电流突变影响较小，减小了对本振模块的信号干扰。

Claims (5)

  1. 一种降低极化损耗的智能车载雷达装置，其特征在于，包括：发送雷达波的发送单元和接收从外部对象发射的雷达波的接收单元，其中
    所述接收单元包括有天线模块、两个微波前端模块、本振模块、两个中频放大模块、两个模数转换模块、存储器模块、极化数字处理器模块、极化控制模块、车速检测触发模块、整流模块、晶体三极管、第一电阻、第二电阻、第一电容、第一开关模块；
    所述天线模块和所述本振模块均与两个微波前端模块相连，所述两个微波前端模块分别与两个中频放大模块相连，两个中频放大模块分别与两个模数转换模块相连，两个模数转换模块均与存储器模块相连，所述存储器模块与极化数字处理器模块相连，所述极化控制模块与所述天线模块相连，所述车速检测触发模块与所述第一电阻、第一电容以及晶体三极管的基极相连，所述晶体三极管的集电极与所述第二电阻和第一开关模块相连，所述第一开关模块通过整流模块与极化控制模块相连；接收的雷达波信号通过天线模块接收后经由相应的微波前端模块进行天线信号选择，经中频放大模块变换到中频，由相应的模数转换模块变为数字信号，通过存储器模块缓存，极化数字处理器模块对存储器缓存的信息进行极化信息的提取，当车速检测触发模块检测到车速大于第一预定值时，触发所述第一电容放电使所述晶体三极管的基极截止、集电极电位上升进而控制第一开关模块导通，由极化控制模块控制天线模块进行极化校准。
  2. 根据权利要求1所述的装置，其特征在于，所述车速检测触发模块包括：车速检测子模块和开关控制子模块，所述车速检测子模块检测车载雷达装置所在车辆的车速，所述开关控制子模块根据所述车速检测子模块检测的车速控制所述第一电容的充放电。
  3. 根据权利要求2所述的装置，其特征在于，所述第一电阻和第一电容的充电时间为：至少一个所述极化控制模块控制进行极化校准的间隔周期。
  4. 根据权利要求1所述的装置，其特征在于，所述天线模块采用双极化天线。
  5. 根据权利要求1所述的装置，其特征在于，所述第一开关模块为晶闸管。
PCT/CN2017/119234 2017-12-28 2017-12-28 一种降低极化损耗的智能车载雷达装置 Ceased WO2019127178A1 (zh)

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