WO2020258231A1 - 毫米波雷达组件安装角度的标定方法及系统、可移动平台 - Google Patents

毫米波雷达组件安装角度的标定方法及系统、可移动平台 Download PDF

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Publication number
WO2020258231A1
WO2020258231A1 PCT/CN2019/093624 CN2019093624W WO2020258231A1 WO 2020258231 A1 WO2020258231 A1 WO 2020258231A1 CN 2019093624 W CN2019093624 W CN 2019093624W WO 2020258231 A1 WO2020258231 A1 WO 2020258231A1
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WIPO (PCT)
Prior art keywords
wave radar
echo signal
millimeter wave
installation angle
angle
Prior art date
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Ceased
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PCT/CN2019/093624
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English (en)
French (fr)
Inventor
陆新飞
李怡强
王宇
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SZ DJI Technology Co Ltd
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SZ DJI Technology Co Ltd
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Publication date
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Priority to PCT/CN2019/093624 priority Critical patent/WO2020258231A1/zh
Priority to CN201980007916.0A priority patent/CN111566505B/zh
Publication of WO2020258231A1 publication Critical patent/WO2020258231A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO 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
    • G01S7/00Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/40Means for monitoring or calibrating
    • G01S7/4052Means for monitoring or calibrating by simulation of echoes
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO 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
    • G01S7/00Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO 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
    • G01S7/00Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/40Means for monitoring or calibrating
    • G01S7/4004Means for monitoring or calibrating of parts of a radar system
    • G01S7/4026Antenna boresight
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO 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
    • G01S7/00Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/41Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
    • G01S7/411Identification of targets based on measurements of radar reflectivity

Definitions

  • This application relates to the technical field of vehicle-mounted radars, in particular to a method for calibrating the installation angle of millimeter wave radar components, a system for calibrating the installation angle of millimeter wave radar components, a movable platform and a computer-readable storage medium .
  • vehicle-mounted millimeter-wave radar has become one of the indispensable sensors in the field of assisted driving and autonomous driving.
  • the main installation schemes of vehicle-mounted millimeter wave radars are 1+2 scheme and 1+4 scheme.
  • the 2 and 4 in the scheme refer to the number of corner radars. Because of their functional requirements, corner radars often use wider beam coverage.
  • a dual radar scheme is generally used. For example, when the number of corner radars is 2, two rearward corner radars can be installed symmetrically at the rear of the vehicle, which are mainly used to observe the rear area of the vehicle to achieve blind spot detection, lane change assistance, and backward collision warning.
  • two angular radars can be installed symmetrically at the front and rear of the vehicle. Since the angle radar is installed at a certain angle, in the case that an accurate horizontal installation angle cannot be obtained, the angle radar will not be able to provide accurate distance and speed of the target relative to the vehicle, and the related functions of the angle radar will be affected.
  • the traditional angle radar horizontal installation angle adopts a mechanical calibration scheme, and because the angle radar is generally installed inside the vehicle bumper, it is very troublesome to disassemble and assemble the bumper when calibrating the installation angle.
  • This application aims to solve at least one of the technical problems existing in the prior art or related technologies.
  • the first aspect of this application proposes a method for calibrating the installation angle of millimeter wave radar components.
  • the second aspect of the present application proposes a calibration system for the installation angle of millimeter wave radar components.
  • the third aspect of this application proposes a movable platform.
  • the fourth aspect of this application provides a computer-readable storage medium.
  • a method for calibrating the installation angle of millimeter wave radar components is provided.
  • the millimeter wave radar components are used for movable platforms.
  • the millimeter wave radar components include a first millimeter wave radar and a second millimeter wave radar. Wave radar, the first millimeter wave radar is used to transmit the first radar signal and receive the first echo signal, the second millimeter wave radar is used to transmit the second radar signal and receive the second echo signal, the first millimeter wave radar and the second The detection range of two millimeter wave radars has overlapping areas.
  • the method for calibrating the installation angle of millimeter wave radar components includes: controlling the first millimeter wave radar and the second millimeter wave radar to respectively transmit the first radar signal and the second radar signal; The first echo signal and the second echo signal; determine the first installation angle of the first millimeter wave radar and the second installation angle of the second millimeter wave radar according to the first echo signal and the second echo signal.
  • the method for calibrating the installation angle of the millimeter wave radar component in the above technical solution provided by this application may also have the following additional technical features:
  • the first installation angle and the second installation angle are installation angles in the same direction.
  • determining the first installation angle of the first millimeter wave radar and the second installation angle of the second millimeter wave radar according to the first echo signal and the second echo signal includes: An echo signal and a second echo signal respectively obtain corresponding detection information.
  • the detection information includes the relative distance and relative angle between the target object and the launch point; according to the distance between the first millimeter wave radar and the second millimeter wave radar, the first The geometric relationship between the relative distance and relative angle corresponding to an echo signal, the relative distance and relative angle corresponding to the second echo signal, the first installation angle and the second installation angle, to determine the first installation angle and the second installation angle .
  • the relative distance and relative angle corresponding to the first echo signal, and the relative distance and relative angle corresponding to the second echo signal includes: taking the direction of the connection line between the first millimeter wave radar and the second millimeter wave radar as the horizontal , Taking the horizontal and vertical direction as the vertical direction, the sum of the horizontal component of the relative distance corresponding to the first echo signal and the relative distance corresponding to the second echo signal in the horizontal direction is equal to the first millimeter wave radar and the second The distance of the millimeter wave radar, the longitudinal component of the relative distance corresponding to the first echo signal and the longitudinal component of the relative distance corresponding to the second echo signal are equal, and the first installation angle and the second installation angle are determined.
  • the method for calibrating the installation angle of the millimeter wave radar component further includes: determining the first installation angle and the second installation angle according to the first echo signal and the second echo signal of different frames, And/or repeat the steps of controlling the first millimeter wave radar and the second millimeter wave radar to respectively transmit the first radar signal and the second radar signal for target objects located at different positions, and determine the corresponding first installation angle and second installation angle Installation angle; calculate the average value of all first installation angles as the final first installation angle; calculate the average value of all second installation angles as the final second installation angle.
  • the target object moves between different positions in the overlapping area to obtain the first echo signal and the second echo signal of the target object in different positions.
  • the target object stays at each position for a preset period of time.
  • the number of target objects is multiple, and the first installation angle of the first millimeter wave radar and the second millimeter wave radar are determined according to the first echo signal and the second echo signal.
  • Installation angle including: determining the corresponding first installation angle and second installation angle for the first echo signal and second echo signal of each target object; calculating the average value of all the first installation angles as the final The first installation angle; calculate the average of all the second installation angles as the final second installation angle.
  • the target object is a corner reflector or a static object placed in an open environment; the movable platform is statically placed in an open environment.
  • acquiring the first echo signal and the second echo signal of the target object includes: receiving the first echo signal and the second echo signal of the same frame; according to the first echo signal And the second echo signal to obtain the corresponding detection information.
  • the detection information includes the relative distance and the relative angle between the target point and the launch point; it will simultaneously satisfy that the relative distance difference between the two is smaller than the radar distance resolution unit and the relative distance between the two The sum of the angles is less than the first angle threshold, and the deviation between the relative angles of the two and the respective rough estimated installation angles is less than the second angle threshold.
  • a first echo signal and a second echo signal are recorded as the first of the target object. The echo signal and the second echo signal.
  • the first angle threshold is related to the consistency of the installation angles of the first millimeter wave radar and the second millimeter wave radar; and/or the second angle threshold is related to the first millimeter wave radar and the second millimeter wave radar.
  • the installation angle consistency of millimeter wave radar is related.
  • the first angle threshold is less than 10°; and/or the second angle threshold is less than 10°.
  • the target object is an object detected by the movable platform during movement.
  • the method for calibrating the installation angle of the millimeter wave radar component further includes: detecting the first candidate object in the first echo signal and the second candidate object in the second echo signal; The first detection information of a candidate object, the first detection information includes the relative distance and the relative angle between the first candidate object and the first millimeter wave radar; the second detection information of the second candidate object is acquired, the second detection information includes the first The relative distance and relative angle between the two candidate objects and the second millimeter wave radar; according to the first detection information and the second detection information, it is determined that the first candidate object and the second candidate object are the same object and the target object.
  • determining that the first candidate object and the second candidate object are the same object and the target object according to the first detection information and the second detection information includes: 2. Detection information, the rough estimated installation angle of the first millimeter wave radar and the rough estimated installation angle of the second millimeter wave radar. Determine the positions of the first candidate object and the second candidate object; determine the first candidate object and the second candidate object whose distance is less than the preset distance The candidate object is the same object and is the target object.
  • a system for calibrating the installation angle of millimeter wave radar components is provided.
  • the millimeter wave radar components are used on a movable platform.
  • the millimeter wave radar components include a first millimeter wave radar and a second millimeter wave radar.
  • a millimeter wave radar is used to transmit the first radar signal and receive the first echo signal
  • the second millimeter wave radar is used to transmit the second radar signal and receive the second echo signal
  • the calibration system of the millimeter wave radar component includes a memory and a processor.
  • the memory is configured to store computer instructions; the processor is configured to execute computer instructions to achieve: control the first millimeter wave radar and the second millimeter wave
  • the radar transmits the first radar signal and the second radar signal respectively; obtains the first echo signal and the second echo signal of the target object; determines the first echo signal of the first millimeter wave radar according to the first echo signal and the second echo signal The installation angle and the second installation angle of the second millimeter wave radar.
  • system for calibrating the installation angle of millimeter-wave radar components in the above technical solution provided by this application may also have the following additional technical features:
  • the first installation angle and the second installation angle are installation angles in the same direction.
  • the first installation angle of the first millimeter wave radar and the second millimeter wave radar are determined according to the first echo signal and the second echo signal.
  • Installation angle including: obtaining corresponding detection information according to the first echo signal and the second echo signal, the detection information including the relative distance and relative angle between the target object and the launch point; according to the first millimeter wave radar and the first The distance between the two millimeter wave radars, the relative distance and relative angle corresponding to the first echo signal, the relative distance and relative angle corresponding to the second echo signal, the geometric relationship between the first installation angle and the second installation angle, determine the An installation angle and a second installation angle.
  • the processor executes computer instructions according to the distance between the first millimeter wave radar and the second millimeter wave radar, the relative distance and relative angle corresponding to the first echo signal, and the second return signal.
  • the geometric relationship between the relative distance and relative angle, the first installation angle, and the second installation angle corresponding to the wave signal to determine the first installation angle and the second installation angle includes: using the first millimeter wave radar and the second millimeter wave radar
  • the direction of the connection line is horizontal, and the vertical direction of the horizontal direction is vertical.
  • the sum of the components in the horizontal direction of the relative distance corresponding to the first echo signal and the relative distance of the second echo signal is equal to The distance between the first millimeter-wave radar and the second millimeter-wave radar, the longitudinal component of the relative distance corresponding to the first echo signal and the longitudinal component of the relative distance corresponding to the second echo signal are equal to determine the first installation angle And the second installation angle.
  • the processor when the processor executes the computer instructions, it also implements: determining the first installation angle and the second installation angle according to the first echo signal and the second echo signal of different frames, and/or For target objects located at different positions, repeat the steps of controlling the first millimeter wave radar and the second millimeter wave radar to respectively transmit the first radar signal and the second radar signal, and determine the corresponding first installation angle and second installation angle; The average value of all the first installation angles is calculated as the final first installation angle; the average value of all the second installation angles is calculated as the final second installation angle.
  • the target object moves between different positions in the overlapping area to obtain the first echo signal and the second echo signal of the target object in different positions.
  • the target object stays at each position for a preset period of time.
  • the number of target objects is multiple, and the first installation angle of the first millimeter wave radar is determined according to the first echo signal and the second echo signal when the processor executes computer instructions And the second installation angle of the second millimeter-wave radar, including: determining the corresponding first installation angle and second installation angle for the first echo signal and second echo signal of each target object; calculating all first installations The average value of the angles is used as the final first installation angle; the average value of all the second installation angles is calculated as the final second installation angle.
  • the target object is a corner reflector or a static object placed in an open environment; the movable platform is statically placed in an open environment.
  • acquiring the first echo signal and the second echo signal of the target object when the processor executes the computer instruction includes: receiving the first echo signal and the second echo signal of the same frame Signal; According to the first echo signal and the second echo signal to obtain the corresponding detection information, the detection information includes the relative distance and the relative angle between the target point and the launch point; it will simultaneously satisfy that the difference in the relative distance between the two is smaller than the radar
  • the distance resolving unit the sum of the relative angles of the two are less than the first angle threshold, and the deviation of the relative angles of the two and the respective rough estimated installation angles is less than the second angle threshold of a first echo signal and a second echo
  • the signals are recorded as the first echo signal and the second echo signal of the target object.
  • the first angle threshold is related to the consistency of the installation angles of the first millimeter wave radar and the second millimeter wave radar; and/or the second angle threshold is related to the first millimeter wave radar and the second millimeter wave radar.
  • the installation angle consistency of millimeter wave radar is related.
  • the first angle threshold is less than 10°; and/or the second angle threshold is less than 10°.
  • the target object is an object detected by the movable platform during movement.
  • the processor when the processor executes the computer instructions, it also implements: detecting the first candidate object in the first echo signal and the second candidate object in the second echo signal; acquiring the first candidate object
  • the first detection information of the first detection information includes the relative distance and the relative angle between the first candidate object and the first millimeter wave radar; the second detection information of the second candidate object is acquired, and the second detection information includes the second candidate object The relative distance and relative angle with the second millimeter wave radar; according to the first detection information and the second detection information, it is determined that the first candidate object and the second candidate object are the same object and are the target object.
  • the processor determines that the first candidate object and the second candidate object are the same object and the target object according to the first detection information and the second detection information when the computer instruction is executed, including : Determine the position of the first candidate object and the second candidate object according to the first detection information, the second detection information, the rough estimated installation angle of the first millimeter wave radar and the rough estimated installation angle of the second millimeter wave radar; determine that the distance is less than the preset distance
  • the first candidate object and the second candidate object of are the same object and are the target object.
  • a movable platform includes a millimeter wave radar component, a memory, and a processor.
  • the millimeter wave radar component includes a first millimeter wave radar and a second millimeter wave radar.
  • Wave radar is used to transmit the first radar signal and receive the first echo signal
  • the second millimeter wave radar is used to transmit the second radar signal and receive the second echo signal
  • the detection of the first millimeter wave radar and the second millimeter wave radar There is an overlapping area in the range
  • the memory is configured to store computer instructions
  • the processor is configured to execute computer instructions to achieve: control the first millimeter wave radar and the second millimeter wave radar to transmit the first radar signal and the second radar signal respectively; acquire the target The first echo signal and the second echo signal of the object; the first installation angle of the first millimeter wave radar and the second installation angle of the second millimeter wave radar are determined according to the first echo signal and the second echo signal.
  • the movable platform in the above technical solution provided by this application may also have the following additional technical features:
  • the first installation angle and the second installation angle are installation angles in the same direction.
  • the first installation angle of the first millimeter wave radar and the second millimeter wave radar are determined according to the first echo signal and the second echo signal.
  • Installation angle including: obtaining corresponding detection information according to the first echo signal and the second echo signal, the detection information including the relative distance and relative angle between the target object and the launch point; according to the first millimeter wave radar and the first The distance between the two millimeter wave radars, the relative distance and relative angle corresponding to the first echo signal, the relative distance and relative angle corresponding to the second echo signal, the geometric relationship between the first installation angle and the second installation angle, determine the An installation angle and a second installation angle.
  • the processor executes computer instructions according to the distance between the first millimeter wave radar and the second millimeter wave radar, the relative distance and relative angle corresponding to the first echo signal, and the second return signal.
  • the geometric relationship between the relative distance and relative angle, the first installation angle, and the second installation angle corresponding to the wave signal to determine the first installation angle and the second installation angle includes: using the first millimeter wave radar and the second millimeter wave radar
  • the direction of the connection line is horizontal, and the vertical direction of the horizontal direction is vertical.
  • the sum of the components in the horizontal direction of the relative distance corresponding to the first echo signal and the relative distance of the second echo signal is equal to The distance between the first millimeter-wave radar and the second millimeter-wave radar, the longitudinal component of the relative distance corresponding to the first echo signal and the longitudinal component of the relative distance corresponding to the second echo signal are equal to determine the first installation angle And the second installation angle.
  • the processor when the processor executes the computer instructions, it also implements: determining the first installation angle and the second installation angle according to the first echo signal and the second echo signal of different frames, and/or For target objects located at different positions, repeat the steps of controlling the first millimeter wave radar and the second millimeter wave radar to respectively transmit the first radar signal and the second radar signal, and determine the corresponding first installation angle and second installation angle; The average value of all the first installation angles is calculated as the final first installation angle; the average value of all the second installation angles is calculated as the final second installation angle.
  • the target object moves between different positions in the overlapping area to obtain the first echo signal and the second echo signal of the target object in different positions.
  • the target object stays at each position for a preset period of time.
  • the number of target objects is multiple, and the first installation angle of the first millimeter wave radar is determined according to the first echo signal and the second echo signal when the processor executes computer instructions And the second installation angle of the second millimeter-wave radar, including: determining the corresponding first installation angle and second installation angle for the first echo signal and second echo signal of each target object; calculating all first installations The average value of the angles is used as the final first installation angle; the average value of all the second installation angles is calculated as the final second installation angle.
  • the target object is a corner reflector or a static object placed in an open environment; the movable platform is statically placed in an open environment.
  • acquiring the first echo signal and the second echo signal of the target object when the processor executes the computer instruction includes: receiving the first echo signal and the second echo signal of the same frame Signal; According to the first echo signal and the second echo signal to obtain the corresponding detection information, the detection information includes the relative distance and the relative angle between the target point and the launch point; it will simultaneously satisfy that the difference in the relative distance between the two is smaller than the radar
  • the distance resolving unit the sum of the relative angles of the two are less than the first angle threshold, and the deviation of the relative angles of the two and the respective rough estimated installation angles is less than the second angle threshold of a first echo signal and a second echo
  • the signals are recorded as the first echo signal and the second echo signal of the target object.
  • the first angle threshold is related to the consistency of the installation angles of the first millimeter wave radar and the second millimeter wave radar; and/or the second angle threshold is related to the first millimeter wave radar and the second millimeter wave radar.
  • the installation angle consistency of millimeter wave radar is related.
  • the first angle threshold is less than 10°; and/or the second angle threshold is less than 10°.
  • the target object is an object detected by the movable platform during movement.
  • the processor when the processor executes the computer instructions, it also implements: detecting the first candidate object in the first echo signal and the second candidate object in the second echo signal; acquiring the first candidate object
  • the first detection information of the first detection information includes the relative distance and the relative angle between the first candidate object and the first millimeter wave radar; the second detection information of the second candidate object is acquired, and the second detection information includes the second candidate object The relative distance and relative angle with the second millimeter wave radar; according to the first detection information and the second detection information, it is determined that the first candidate object and the second candidate object are the same object and are the target object.
  • the processor determines that the first candidate object and the second candidate object are the same object and the target object according to the first detection information and the second detection information when the computer instruction is executed, including : Determine the position of the first candidate object and the second candidate object according to the first detection information, the second detection information, the rough estimated installation angle of the first millimeter wave radar and the rough estimated installation angle of the second millimeter wave radar; determine that the distance is less than the preset distance
  • the first candidate object and the second candidate object of are the same object and are the target object.
  • a computer-readable storage medium on which a computer program is stored.
  • the computer program is executed by a processor, the installation angle of the millimeter wave radar component as described in any of the technical solutions is realized. Steps of the calibration method.
  • the millimeter wave radar When the millimeter wave radar is set as a corner radar, due to its functional requirements, the beam is generally wider, so the diagonal radar usually has an overlapping area of beam coverage.
  • the embodiment of the present application provides a solution for calibrating the installation angle of the millimeter wave radar assembly, which uses the overlapping area of the detection range of the first millimeter wave radar and the second millimeter wave radar of the millimeter wave radar assembly.
  • the radar signal emitted by the millimeter-wave radar will be reflected to form an echo signal after encountering an obstacle.
  • the echo signal is affected by two factors, the position of the obstacle and the installation angle of the millimeter-wave radar. Any of these factors can be used To represent another factor, but when any one of the factors is uncertain, the other factor obtained is not accurate.
  • the method provided in this application obtains the first echo signal and the second echo signal of a target object in the above-mentioned overlapping area, and the first echo signal and the second echo signal reflect the same obstacle (that is, the The location of the target object), that is, the presence of the same location factor, can be used to analyze the first echo signal and the second echo signal, and obtain the first installation angle of the first millimeter wave radar and the second millimeter wave radar The second installation angle.
  • This application adopts a signal processing method to avoid the complicated operations of traditional mechanical calibration, thereby greatly simplifying the installation angle calibration process, greatly reducing the calibration complexity, and greatly reducing the required labor and time costs.
  • Fig. 1 shows a schematic flow chart of a method for calibrating the installation angle of millimeter wave radar components according to an embodiment of the present application
  • FIG. 2 shows a schematic diagram of a method for calibrating the installation angle of millimeter wave radar components according to an embodiment of the present application
  • Figure 3 shows a schematic structural diagram of a system for calibrating the installation angle of millimeter wave radar components according to an embodiment of the present application
  • Fig. 4 shows a schematic structural diagram of a movable platform according to an embodiment of the present application.
  • the embodiment of the first aspect of the present application provides a method for calibrating the installation angle of a millimeter wave radar component.
  • the millimeter wave radar component is used on a movable platform (such as a vehicle, an unmanned aerial vehicle, etc.).
  • the millimeter wave radar component includes a first millimeter wave Radar and second millimeter wave radar, the first millimeter wave radar is used to transmit the first radar signal and receive the first echo signal, the second millimeter wave radar is used to transmit the second radar signal and receive the second echo signal, the first The detection ranges of the millimeter wave radar and the second millimeter wave radar overlap.
  • the millimeter wave radar component when used in a vehicle, it can be two millimeter wave radars installed on the front left and right front of the vehicle, and the two millimeter wave radars are used to detect the environment in the front left and right front of the vehicle, respectively. In addition, there is an overlapping area directly in front of the vehicle, so that the situation in front of the vehicle can be completely detected without missing a specific area, and it can provide better environment perception for assisted driving or automatic driving of the vehicle.
  • the millimeter-wave radar component when used on an unmanned aerial vehicle, it can be two millimeter-wave radars installed in the front and bottom of the unmanned aerial vehicle. The two millimeter-wave radars are used to detect the front and rear of the unmanned aerial vehicle.
  • the millimeter wave radar component can also be used on other movable platforms, which is not limited in this application.
  • Fig. 1 shows a schematic flowchart of a method for calibrating the installation angle of a millimeter wave radar component according to an embodiment of the present application.
  • the calibration method for the installation angle of the millimeter wave radar component includes:
  • S104 Acquire a first echo signal and a second echo signal of the target object
  • S106 Determine the first installation angle of the first millimeter wave radar and the second installation angle of the second millimeter wave radar according to the first echo signal and the second echo signal.
  • the millimeter wave radar When the millimeter wave radar is set as a corner radar, due to its functional requirements, the beam is generally wider, so the diagonal radar usually has an overlapping area of beam coverage.
  • the method for calibrating the installation angle of the millimeter-wave radar component uses the overlapping area of the detection range of the first millimeter-wave radar and the second millimeter-wave radar of the millimeter-wave radar component.
  • the radar signal emitted by the millimeter-wave radar will be reflected to form an echo signal after encountering an obstacle.
  • the echo signal is affected by two factors, the position of the obstacle and the installation angle of the millimeter-wave radar. Any of these factors can be used To represent another factor, but when any one of the factors is uncertain, the other factor obtained is not accurate.
  • the method provided in this application obtains the first echo signal and the second echo signal of a target object in the above-mentioned overlapping area, and the first echo signal and the second echo signal reflect the same obstacle (that is, the The location of the target object), that is, the presence of the same location factor, can be used to analyze the first echo signal and the second echo signal, and obtain the first installation angle of the first millimeter wave radar and the second millimeter wave radar The second installation angle.
  • This application adopts a signal processing method to avoid the complicated operations of traditional mechanical calibration, thereby greatly simplifying the installation angle calibration process, greatly reducing the calibration complexity, and greatly reducing the required labor and time costs. It can be understood that this application is not limited to millimeter wave radars, but is applicable to the calibration of the installation angles of any two radars with overlapping areas.
  • the first installation angle and the second installation angle are installation angles in the same direction.
  • the installation angle of the radar is the deflection angle of the installation surface relative to a certain direction.
  • the two are the installation surface of the first millimeter wave radar and the installation surface of the second millimeter wave radar relative to the same
  • the deflection angle in one direction for example, as shown in Fig.
  • the first installation angle ⁇ M is the deflection angle of the installation surface of the first millimeter wave radar relative to the horizontal direction (that is, the x-axis in the figure), and the second installation angle ⁇ S is the first The deflection angle of the installation surface of the two millimeter wave radar relative to the horizontal direction helps to ensure the accuracy of the calibration result when the installation angle is calibrated using the overlapping area.
  • determining the first installation angle of the first millimeter wave radar and the second installation angle of the second millimeter wave radar according to the first echo signal and the second echo signal includes: according to the first echo signal and The second echo signal obtains corresponding detection information.
  • the detection information includes the relative distance and relative angle between the target object and the launch point; according to the distance between the first millimeter wave radar and the second millimeter wave radar, the first echo signal corresponds to The geometric relationship between the relative distance and relative angle of the second echo signal, the relative distance and relative angle corresponding to the second echo signal, the first installation angle, and the second installation angle determine the first installation angle and the second installation angle.
  • the target object in the overlapping area is simultaneously observed by the first millimeter wave radar and the second millimeter wave radar.
  • the relative distance and relative angle are measured by the radar, and combined with the geometric relationship, the two millimeter wave radars can be calculated. installation angle.
  • This embodiment accurately obtains the installation angle of the millimeter-wave radar through data processing and calculation, avoiding the complicated operations of traditional mechanical calibration, thereby greatly simplifying the installation angle calibration process, greatly reducing the calibration complexity, and greatly reducing the need Manpower and time costs.
  • the relative distance and relative angle corresponding to the first echo signal, the relative distance and relative angle corresponding to the second echo signal, the first installation The geometric relationship between the angle and the second installation angle to determine the first installation angle and the second installation angle includes: taking the connection direction between the first millimeter-wave radar and the second millimeter-wave radar as the horizontal direction, and the horizontal vertical The direction is the longitudinal direction.
  • the sum of the horizontal components of the relative distance corresponding to the first echo signal and the relative distance corresponding to the second echo signal in the horizontal direction is equal to the distance between the first millimeter wave radar and the second millimeter wave radar.
  • the longitudinal component of the relative distance corresponding to the first echo signal is equal to the longitudinal component of the relative distance corresponding to the second echo signal, and the first installation angle and the second installation angle are determined.
  • how to express the geometric position relationship between the first millimeter wave radar, the second millimeter wave radar and the target object is specifically defined.
  • the first millimeter wave radar, the second millimeter wave radar and the target object form a triangle in the same plane.
  • the distance between the first millimeter wave radar and the second millimeter wave radar reflects the length of the first side of the triangle.
  • the relative distances of the wave signal and the second echo signal respectively reflect the side lengths of the second side and the third side of the triangle.
  • the angle between the second side and the first side can use the relative angle corresponding to the first echo signal and the first installation
  • the included angle between the third side and the first side can be represented by the relative angle corresponding to the second echo signal and the second installation angle. Therefore, the first installation angle and the first installation angle can be calculated by the above geometric position relationship. 2. Installation angle.
  • the connection between the first millimeter wave radar and the second millimeter wave radar is the x axis of the vehicle body coordinate system
  • the vehicle’s own central axis is the y axis
  • d is the single millimeter wave radar to the vehicle body coordinate system.
  • ⁇ M is the first installation angle, that is, the angle between the installation surface of the first millimeter wave radar and the x axis
  • ⁇ S is the second installation angle, that is, the distance between the installation surface of the second millimeter wave radar and the x axis Angle.
  • (r M , ⁇ M ) and (r S , ⁇ S ) are the polar coordinates of the first millimeter wave radar and the second millimeter wave radar in the radar itself.
  • the relative distance and relative angle obtained under the system. According to the geometric relationship
  • Each angle is a value with a direction, that is, there are positive and negative points, not an absolute value.
  • the first equation is equivalent to expressing the relative distance corresponding to the first echo signal in the transverse direction -r M ⁇ sin( ⁇ M - ⁇ M ) and the relative distance corresponding to the second echo signal in the transverse direction
  • the sum of the components r S ⁇ sin( ⁇ S - ⁇ S ) is equal to the distance 2d between the first millimeter wave radar and the second millimeter wave radar.
  • the second equation expresses the relative distance corresponding to the first echo signal in the longitudinal direction
  • the component r M ⁇ cos ( ⁇ M- ⁇ M ) of the second echo signal corresponds to the longitudinal component r S ⁇ cos ( ⁇ S- ⁇ S ) of the relative distance.
  • determining the first installation angle of the first millimeter wave radar and the second installation angle of the second millimeter wave radar according to the first echo signal and the second echo signal includes: according to the first echo of different frames The wave signal and the second echo signal respectively determine the first installation angle and the second installation angle; calculate the average value of all the first installation angles as the final first installation angle; calculate the average value of all the second installation angles as the final The second installation angle.
  • the millimeter wave radar can continuously transmit radar signals, and then continuously receive echo signals.
  • first echo signal and the second echo signal received in different frames multiple groups of first installations can be determined respectively.
  • the angle and the second installation angle, and then the average of all calculation results are output as the final first installation angle and the second installation angle, which can reduce the installation angle deviation caused by the measurement error.
  • the method for calibrating the installation angle of the millimeter wave radar component further includes: for target objects located at different positions, repeatedly controlling the first millimeter wave radar and the second millimeter wave radar to transmit the first radar signal and the second radar, respectively Signal step, and determine the corresponding first installation angle and second installation angle; calculate the average value of all first installation angles as the final first installation angle; calculate the average value of all second installation angles as the final first installation angle 2. Installation angle.
  • the position of the target object is further changed, and multiple sets of the first installation angle and the second installation angle are calculated for the target objects at different positions, and then the average of all calculation results is used as the final first installation
  • the angle and the second installation angle output can reduce the installation angle deviation caused by measurement error.
  • first echo signal and the second echo signal of the target object at different positions in different frames can be combined to determine the first installation angle and the second installation angle.
  • the multi-frame results of multiple positions can be processed jointly. It can further reduce the installation angle deviation caused by measurement error.
  • the target object moves between different positions in the overlapping area to obtain the first echo signal and the second echo signal of the target object in different positions.
  • one target object by moving the target object between different positions in the overlapping area, one target object can be used to obtain multiple sets of first echo signals and second echo signals, and then multiple sets of first installation angles can be determined And the second installation angle, reduce the installation angle deviation caused by measurement error.
  • the target object stays at each location for a preset period of time.
  • the target object is further allowed to stay at each position for a preset period of time.
  • the automation of movement control is improved, and on the other hand, multi-frame results can be obtained at each position, which enriches the number of samples.
  • the preset duration of the target object staying at each position is equal, such as 10s or 15s, which is convenient for control and ensures that the number of calculation results obtained at each position is equal, so that the calculation results at different positions are final The influence of the calculation results is consistent.
  • the number of target objects is multiple, and the first installation angle of the first millimeter wave radar and the second installation angle of the second millimeter wave radar are determined according to the first echo signal and the second echo signal, including : For the first echo signal and second echo signal of each target object, determine the corresponding first installation angle and second installation angle; calculate the average value of all the first installation angles as the final first installation angle; Calculate the average of all the second installation angles as the final second installation angle.
  • the number of target objects is specifically limited.
  • multiple sets of first echo signals and second echo signals can be obtained at the same time, which is equivalent to performing calculations for target objects at different positions at the same time.
  • It can not only increase the number of samples per unit time, but also reduce the requirements on the surrounding environment, that is, it is not necessary to clean the overlapping area to ensure that there is only one target object.
  • the echo signals of different frames can be further combined to further increase the number of samples.
  • the target object is a corner reflector or a static object placed in an open environment; the vehicle is statically placed in an open environment.
  • both the target object and the vehicle are placed in an open environment, that is, this embodiment provides a static calibration solution for the installation angle of the millimeter wave radar component.
  • the target object may be a corner reflector to increase the strength of the echo signal, or it may be a normal static object. This solution is particularly suitable for the vehicle production test phase.
  • acquiring the first echo signal and the second echo signal of the target object includes: receiving the first echo signal and the second echo signal of the same frame; according to the first echo signal and the second echo signal
  • the signals obtain the corresponding detection information.
  • the detection information includes the relative distance and the relative angle between the target point and the launch point; it will simultaneously satisfy that the relative distance difference between the two is smaller than the radar range resolution unit, and the sum of the relative angles of the two is smaller than the first
  • a first echo signal and a second echo signal whose deviations between the relative angle of the two angle thresholds and the respective rough estimated installation angles are less than the second angle threshold are recorded as the first echo signal and the first echo signal of the target object.
  • This embodiment specifically defines a solution for determining a group of first echo signals and second echo signals.
  • receive the first echo signal and the second echo signal of the same frame to ensure the time consistency of the first echo signal and the second echo signal, and then screen out the first echo signal and the second echo signal for the same target object.
  • the second echo signal Specifically, the echo signal of the same frame is analyzed to obtain corresponding detection information, including the relative distance and relative angle between the target point and the emission point.
  • the target object is in the overlapping area, and the overlapping area is between the first millimeter wave radar and the second millimeter wave radar, and the range is not too large, it can be considered that the first echo signal and the second echo signal of the same target object
  • the detection information corresponding to the wave signal is approximately symmetrical with respect to the symmetry axis of the first millimeter wave radar and the second millimeter wave radar, that is, the relative distance difference between the two is very small, and the relative angle between the two should be the same because of the direction. Positive and negative, so the sum of the relative angles of the two is very small.
  • the radar range resolution unit also known as the radar range resolution
  • the minimum distance distinguished by the radar and the first angle threshold. It can be considered that the difference between the relative distance is smaller than the radar distance resolution unit, and the sum of the relative angles is smaller than the first angle threshold.
  • a first echo signal and a second echo signal It is the first echo signal and the second echo signal of the same target object.
  • the difference between the relative angle in the detection information and the installation angle of the corresponding radar should be equal to the angle between the line between the target point and the launch point and the aforementioned longitudinal direction, and overlap
  • the area is a small area between the first millimeter wave radar and the second millimeter wave radar, so the included angle should be a small value.
  • the first angle threshold is related to the installation angle consistency of the first millimeter wave radar and the second millimeter wave radar; and/or the second angle threshold is related to the installation angle of the first millimeter wave radar and the second millimeter wave radar Angular consistency is related.
  • the first angle threshold and/or the second angle threshold are related to the consistency of the installation angles of the first millimeter wave radar and the second millimeter wave radar.
  • the more consistent the installation angle of the first millimeter wave radar and the second millimeter wave radar, the more symmetrical the millimeter wave radars emitted by the first millimeter wave radar and the second millimeter wave radar, the first echo signal and the second echo signal The closer the corresponding relative angles are, the closer the rough installation angles of the first millimeter-wave radar and the second millimeter-wave radar are, and the smaller the value of the first angle threshold and/or the second angle threshold, the specific values can be combined with experiments get.
  • the first angle threshold is less than 10°.
  • the second angle threshold is less than 10°.
  • the target object is an object detected during the movement of the vehicle.
  • the vehicle is in a moving state
  • the target object is an object detected during the movement of the vehicle
  • this embodiment provides a dynamic calibration solution for the installation angle of the millimeter wave radar component.
  • the method for calibrating the installation angle of the millimeter-wave radar component further includes: detecting a first candidate object in the first echo signal and a second candidate object in the second echo signal; acquiring the first candidate object One detection information, the first detection information includes the relative distance and relative angle between the first candidate object and the first millimeter wave radar; the second detection information of the second candidate object is acquired, and the second detection information includes the second candidate object and the first The relative distance and relative angle between the two millimeter wave radars; according to the first detection information and the second detection information, it is determined that the first candidate object and the second candidate object are the same object and are the target object.
  • determining that the first candidate object and the second candidate object are the same object and the target object according to the first detection information and the second detection information includes: according to the first detection information, the second detection information, and the second The rough estimated installation angle of a millimeter wave radar and the rough estimated installation angle of a second millimeter wave radar determine the positions of the first candidate object and the second candidate object; determine that the first candidate object and the second candidate object whose distance is less than the preset distance are the same object , And is the target object.
  • the first candidate object and the second candidate object are the same object.
  • the first echo signal corresponding to each first echo signal can be calculated.
  • the positions of the first candidate object and the second candidate object that are the same object should coincide, but because of the calculation used
  • the installation angle is roughly estimated, so there will be errors in the calculation results, but the difference is not too large.
  • the distance between each first candidate object and each second candidate object is calculated separately, and the distance is smaller than the preset distance.
  • the first candidate object and the second candidate object are determined to be the same object, that is, the target object, which ensures the smooth operation of the scheme.
  • the calibration method of the installation angle of the millimeter wave radar component includes:
  • Step 1 Measure the distance d between the first millimeter wave radar or the second millimeter wave radar and the central axis of the vehicle body;
  • Step 2 Control the first millimeter wave radar and the second millimeter wave radar to respectively transmit the first radar signal and the second radar signal;
  • Step 3 Place corner reflectors at N positions near the center axis of the vehicle body from near and far, and stay at each position for 10s;
  • Step 4 Process the first echo signal and the second echo signal obtained at each location, and obtain detection information (r M , ⁇ M ) and (r S , ⁇ S ) respectively.
  • One detection information reflects a target Point location
  • Step 5 in each frame of results obtained at each position, find the target points that meet the following conditions at the same time
  • r ⁇ is the radar range resolution unit
  • a M ⁇ is the rough estimated installation angle of the first millimeter wave radar
  • a S ⁇ is the second millimeter wave radar
  • the rough estimation of the installation angle, ⁇ ⁇ and ⁇ ⁇ are the angle thresholds not exceeding 10°, and the specific value depends on the degree of consistency difference between the installation angles of the first millimeter wave radar and the second millimeter wave radar.
  • Step 7 Take the average of all I target processing results to obtain the first installation angle and the second installation angle
  • the embodiment of the second aspect of the present application provides a system for calibrating the installation angle of millimeter wave radar components.
  • the millimeter wave radar components are used for movable platforms (such as vehicles).
  • the millimeter wave radar components include a first millimeter wave radar and a second millimeter wave radar. Wave radar, the first millimeter wave radar is used to transmit the first radar signal and receive the first echo signal, the second millimeter wave radar is used to transmit the second radar signal and receive the second echo signal, the first millimeter wave radar and the second There is an overlapping area in the detection range of the two millimeter wave radar.
  • Fig. 3 shows a schematic structural diagram of a system for calibrating the installation angle of millimeter wave radar components according to an embodiment of the present application.
  • the system 100 for calibrating the installation angle of millimeter wave radar components includes:
  • the memory 102 is configured to store computer instructions
  • the processor 104 is configured to execute computer instructions to implement: control the first millimeter wave radar and the second millimeter wave radar to transmit the first radar signal and the second radar signal, respectively; obtain the first echo signal and the second echo signal of the target object Wave signal; Determine the first installation angle of the first millimeter wave radar and the second installation angle of the second millimeter wave radar according to the first echo signal and the second echo signal.
  • the system 100 for calibrating the installation angle of millimeter wave radar components utilizes the overlapping detection range of the first millimeter wave radar and the second millimeter wave radar of the millimeter wave radar component. Obtain the first echo signal and the second echo signal of a target object in the above-mentioned overlapping area, then the first echo signal and the second echo signal reflect the position of the same obstacle (that is, the target object) , That is, there are the same position factors, which can be used to analyze the first echo signal and the second echo signal, and obtain the first installation angle of the first millimeter wave radar and the second installation angle of the second millimeter wave radar.
  • This application adopts a signal processing method to avoid the complicated operations of traditional mechanical calibration, thereby greatly simplifying the installation angle calibration process, greatly reducing the calibration complexity, and greatly reducing the required labor and time costs. It can be understood that this application is not limited to millimeter wave radars, but is applicable to the calibration of the installation angles of any two radars with overlapping areas.
  • the first installation angle and the second installation angle are installation angles in the same direction.
  • the two are the installation surface of the first millimeter wave radar and the installation surface of the second millimeter wave radar relative to the same
  • the deflection angle in one direction helps to ensure the accuracy of the calibration result when the installation angle is calibrated using the overlapping area.
  • the processor 104 determines the first installation angle of the first millimeter wave radar and the second installation angle of the second millimeter wave radar according to the first echo signal and the second echo signal when the processor 104 executes the computer instructions, Including: obtain corresponding detection information according to the first echo signal and the second echo signal, the detection information includes the relative distance and relative angle between the target object and the launch point; according to the first millimeter wave radar and the second millimeter wave radar The distance, the relative distance and relative angle corresponding to the first echo signal, the relative distance and relative angle corresponding to the second echo signal, the geometric relationship between the first installation angle and the second installation angle, determine the first installation angle and The second installation angle.
  • the target object in the overlapping area is simultaneously observed by the first millimeter wave radar and the second millimeter wave radar.
  • the relative distance and relative angle are measured by the radar, and combined with the geometric relationship, the two millimeter wave radars can be calculated. installation angle.
  • This embodiment accurately obtains the installation angle of the millimeter-wave radar through data processing and calculation, avoiding the complicated operations of traditional mechanical calibration, thereby greatly simplifying the installation angle calibration process, greatly reducing the calibration complexity, and greatly reducing the need Manpower and time costs.
  • the processor 104 executes computer instructions according to the distance between the first millimeter wave radar and the second millimeter wave radar, the relative distance and relative angle corresponding to the first echo signal, and the second echo signal corresponding to the distance.
  • the geometric relationship between the relative distance and the relative angle, the first installation angle, and the second installation angle to determine the first installation angle and the second installation angle includes: the connection between the first millimeter wave radar and the second millimeter wave radar The line direction is horizontal, and the horizontal vertical direction is vertical.
  • the sum of the components of the relative distance corresponding to the first echo signal and the relative distance of the second echo signal in the horizontal direction is equal to the first millimeter wave
  • the distance between the radar and the second millimeter-wave radar, the longitudinal component of the relative distance corresponding to the first echo signal and the longitudinal component of the relative distance corresponding to the second echo signal are equal, the first installation angle and the second installation are determined angle.
  • how to express the geometric position relationship between the first millimeter wave radar, the second millimeter wave radar and the target object is specifically defined.
  • the first millimeter wave radar, the second millimeter wave radar and the target object form a triangle in the same plane.
  • the distance between the first millimeter wave radar and the second millimeter wave radar reflects the length of the first side of the triangle.
  • the relative distances of the wave signal and the second echo signal respectively reflect the side lengths of the second side and the third side of the triangle.
  • the angle between the second side and the first side can use the relative angle corresponding to the first echo signal and the first installation
  • the included angle between the third side and the first side can be represented by the relative angle corresponding to the second echo signal and the second installation angle. Therefore, the first installation angle and the first installation angle can be calculated by the above geometric position relationship. 2. Installation angle.
  • the processor 104 determines the first installation angle of the first millimeter wave radar and the second installation angle of the second millimeter wave radar according to the first echo signal and the second echo signal when the processor 104 executes the computer instructions, Including: determining the first installation angle and the second installation angle according to the first echo signal and the second echo signal of different frames; calculating the average value of all the first installation angles as the final first installation angle; calculating all the first installation angles The average of the two installation angles is used as the final second installation angle.
  • the millimeter wave radar can continuously transmit radar signals, and then continuously receive echo signals.
  • first echo signal and the second echo signal received in different frames multiple groups of first installations can be determined respectively.
  • the angle and the second installation angle, and then the average of all calculation results are output as the final first installation angle and the second installation angle, which can reduce the installation angle deviation caused by the measurement error.
  • the processor 104 when the processor 104 executes computer instructions, it also implements: for target objects located at different positions, repeatedly execute the control of the first millimeter wave radar and the second millimeter wave radar to transmit the first radar signal and the second radar signal, respectively. Step, and determine the corresponding first installation angle and second installation angle; calculate the average value of all first installation angles as the final first installation angle; calculate the average value of all second installation angles as the final second installation angle.
  • the position of the target object is further changed, and multiple sets of the first installation angle and the second installation angle are calculated for the target objects at different positions, and then the average of all calculation results is used as the final first installation
  • the angle and the second installation angle output can reduce the installation angle deviation caused by measurement error.
  • the target object moves between different positions in the overlapping area to obtain the first echo signal and the second echo signal of the target object in different positions.
  • one target object by moving the target object between different positions in the overlapping area, one target object can be used to obtain multiple sets of first echo signals and second echo signals, and then multiple sets of first installation angles can be determined And the second installation angle, reduce the installation angle deviation caused by measurement error.
  • the target object stays at each location for a preset period of time.
  • the target object is further allowed to stay at each position for a preset period of time, on the one hand, the automation of movement control is improved, on the other hand, multi-frame results can be obtained at each position, which enriches the number of samples.
  • the number of target objects is multiple, and the processor 104 determines the first installation angle and the second millimeter of the first millimeter wave radar according to the first echo signal and the second echo signal when the processor 104 executes computer instructions.
  • the second installation angle of the wave radar includes: determining the corresponding first installation angle and second installation angle for the first echo signal and second echo signal of each target object; calculating the average value of all the first installation angles , As the final first installation angle; calculate the average of all the second installation angles, as the final second installation angle.
  • the number of target objects is specifically limited.
  • multiple sets of first echo signals and second echo signals can be obtained at the same time, which is equivalent to performing calculations for target objects at different positions at the same time.
  • It can not only increase the number of samples per unit time, but also reduce the requirements on the surrounding environment, that is, it is not necessary to clean the overlapping area to ensure that there is only one target object.
  • the echo signals of different frames can be further combined to further increase the number of samples.
  • the target object is a corner reflector or a static object placed in an open environment; the vehicle is statically placed in an open environment.
  • both the target object and the vehicle are placed in an open environment, that is, this embodiment provides a static calibration solution for the installation angle of the millimeter wave radar component. At this time, there are no other interference obstacles in the environment, and the target object and the vehicle are in a stable resting state, which can improve the accuracy of the calibration result.
  • This solution is particularly suitable for the vehicle production test phase.
  • acquiring the first echo signal and the second echo signal of the target object when the processor 104 executes the computer instruction includes: receiving the first echo signal and the second echo signal of the same frame; One echo signal and the second echo signal respectively obtain corresponding detection information.
  • the detection information includes the relative distance and relative angle between the target point and the launch point; it will satisfy that the relative distance difference between the two is smaller than the radar distance resolution unit, The sum of the relative angles of the two is less than the first angle threshold, and the deviation of the relative angle between the two and the respective rough estimated installation angles is less than the second angle threshold.
  • a first echo signal and a second echo signal are recorded as the target The first echo signal and the second echo signal of the object.
  • This embodiment specifically defines a solution for determining a group of first echo signals and second echo signals.
  • receive the first echo signal and the second echo signal of the same frame to ensure the time consistency of the first echo signal and the second echo signal, and then screen out the first echo signal and the second echo signal for the same target object.
  • the second echo signal Specifically, the echo signal of the same frame is analyzed to obtain corresponding detection information, including the relative distance and relative angle between the target point and the emission point.
  • the target object is in the overlapping area, and the overlapping area is between the first millimeter wave radar and the second millimeter wave radar, and the range is not too large, it can be considered that the first echo signal and the second echo signal of the same target object
  • the detection information corresponding to the wave signal is approximately symmetrical with respect to the symmetry axis of the first millimeter wave radar and the second millimeter wave radar, that is, the relative distance difference between the two is very small, and the relative angle between the two should be the same because of the direction. Positive and negative, so the sum of the relative angles of the two is very small.
  • the radar range resolution unit and the first angle threshold are introduced respectively, and the difference of the relative distance can be considered to be smaller than the radar range resolution unit, and the sum of the relative angles is smaller than the first angle threshold
  • a first echo signal and a second echo signal of are the first echo signal and the second echo signal of the same target object.
  • the difference between the relative angle in the detection information and the installation angle of the corresponding radar should be equal to the angle between the line between the target point and the launch point and the aforementioned longitudinal direction, and overlap
  • the area is a small area between the first millimeter wave radar and the second millimeter wave radar, so the included angle should be a small value.
  • the first angle threshold is related to the installation angle consistency of the first millimeter wave radar and the second millimeter wave radar; and/or the second angle threshold is related to the installation angle of the first millimeter wave radar and the second millimeter wave radar Angular consistency is related.
  • the first angle threshold and/or the second angle threshold are related to the consistency of the installation angles of the first millimeter wave radar and the second millimeter wave radar.
  • the more consistent the installation angle of the first millimeter wave radar and the second millimeter wave radar, the more symmetrical the millimeter wave radars emitted by the first millimeter wave radar and the second millimeter wave radar, the first echo signal and the second echo signal The closer the corresponding relative angles are, the closer the rough installation angles of the first millimeter-wave radar and the second millimeter-wave radar are, and the smaller the value of the first angle threshold and/or the second angle threshold, the specific values can be combined with experiments get.
  • the first angle threshold is less than 10°
  • the second angle threshold is less than 10°.
  • the target object is an object detected during the movement of the vehicle.
  • the vehicle is in a moving state
  • the target object is an object detected during the movement of the vehicle
  • this embodiment provides a dynamic calibration solution for the installation angle of the millimeter wave radar component.
  • the processor 104 when the processor 104 executes the computer instructions, it also implements: detecting the first candidate object in the first echo signal and the second candidate object in the second echo signal; acquiring the first detection of the first candidate object Information, the first detection information includes the relative distance and relative angle between the first candidate object and the first millimeter wave radar; the second detection information of the second candidate object is acquired, and the second detection information includes the second candidate object and the second millimeter The relative distance and relative angle between wave radars; according to the first detection information and the second detection information, it is determined that the first candidate object and the second candidate object are the same object and the target object.
  • the first candidate object and the second candidate object are determined to be the same object and the target object according to the first detection information and the second detection information, including: The detection information, the second detection information, the rough estimated installation angle of the first millimeter wave radar and the rough estimated installation angle of the second millimeter wave radar determine the positions of the first candidate object and the second candidate object; determine the first candidate whose distance is less than the preset distance The object and the second candidate object are the same object and are the target object.
  • the first candidate object and the second candidate object are the same object.
  • the first echo signal corresponding to each first echo signal can be calculated.
  • the positions of the first candidate object and the second candidate object that are the same object should coincide, but because of the calculation used
  • the installation angle is roughly estimated, so there will be errors in the calculation results, but the difference is not too large.
  • the distance between each first candidate object and each second candidate object is calculated separately, and the distance is smaller than the preset distance.
  • the first candidate object and the second candidate object are determined to be the same object, that is, the target object, which ensures the smooth operation of the scheme.
  • the embodiment of the third aspect of the present application provides a movable platform (such as a vehicle).
  • Fig. 4 shows a schematic structural diagram of a movable platform according to an embodiment of the present application.
  • the movable platform 200 includes:
  • the millimeter wave radar component 202 includes a first millimeter wave radar and a second millimeter wave radar.
  • the first millimeter wave radar is used to transmit the first radar signal and receive the first echo signal
  • the second millimeter wave radar is used to transmit the second The radar signal and receiving the second echo signal, the detection range of the first millimeter wave radar and the second millimeter wave radar overlap;
  • the memory 204 is configured to store computer instructions
  • the processor 206 is configured to execute computer instructions to implement: control the first millimeter wave radar and the second millimeter wave radar to transmit the first radar signal and the second radar signal, respectively; obtain the first echo signal and the second echo signal of the target object Wave signal; Determine the first installation angle of the first millimeter wave radar and the second installation angle of the second millimeter wave radar according to the first echo signal and the second echo signal.
  • the movable platform 200 uses the overlapping area of the detection range of the first millimeter wave radar and the second millimeter wave radar of the millimeter wave radar assembly 202. Obtain the first echo signal and the second echo signal of a target object in the above-mentioned overlapping area, then the first echo signal and the second echo signal reflect the position of the same obstacle (that is, the target object) , That is, there are the same position factors, which can be used to analyze the first echo signal and the second echo signal, and obtain the first installation angle of the first millimeter wave radar and the second installation angle of the second millimeter wave radar.
  • This application adopts a signal processing method to avoid the complicated operations of traditional mechanical calibration, thereby greatly simplifying the installation angle calibration process, greatly reducing the calibration complexity, and greatly reducing the required labor and time costs. It can be understood that this application is not limited to millimeter wave radars, but is applicable to the calibration of the installation angles of any two radars with overlapping areas.
  • the first installation angle and the second installation angle are installation angles in the same direction.
  • the two are the installation surface of the first millimeter wave radar and the installation surface of the second millimeter wave radar relative to the same
  • the deflection angle in one direction helps to ensure the accuracy of the calibration result when the installation angle is calibrated using the overlapping area.
  • the processor 206 determines the first installation angle of the first millimeter wave radar and the second installation angle of the second millimeter wave radar according to the first echo signal and the second echo signal when the processor 206 executes the computer instructions, Including: obtain corresponding detection information according to the first echo signal and the second echo signal, the detection information includes the relative distance and relative angle between the target object and the launch point; according to the first millimeter wave radar and the second millimeter wave radar The distance, the relative distance and relative angle corresponding to the first echo signal, the relative distance and relative angle corresponding to the second echo signal, the geometric relationship between the first installation angle and the second installation angle, determine the first installation angle and The second installation angle.
  • the target object in the overlapping area is simultaneously observed by the first millimeter wave radar and the second millimeter wave radar.
  • the relative distance and relative angle are measured by the radar, and combined with the geometric relationship, the two millimeter wave radars can be calculated. installation angle.
  • This embodiment accurately obtains the installation angle of the millimeter-wave radar through data processing and calculation, avoiding the complicated operations of traditional mechanical calibration, thereby greatly simplifying the installation angle calibration process, greatly reducing the calibration complexity, and greatly reducing the need Manpower and time costs.
  • the processor 206 executes the computer instructions according to the distance between the first millimeter wave radar and the second millimeter wave radar, the relative distance and relative angle corresponding to the first echo signal, and the second echo signal corresponding to the distance.
  • the geometric relationship between the relative distance and the relative angle, the first installation angle, and the second installation angle to determine the first installation angle and the second installation angle includes: the connection between the first millimeter wave radar and the second millimeter wave radar The line direction is horizontal, and the horizontal vertical direction is vertical.
  • the sum of the components of the relative distance corresponding to the first echo signal and the relative distance of the second echo signal in the horizontal direction is equal to the first millimeter wave
  • the distance between the radar and the second millimeter-wave radar, the longitudinal component of the relative distance corresponding to the first echo signal and the longitudinal component of the relative distance corresponding to the second echo signal are equal, the first installation angle and the second installation are determined angle.
  • how to express the geometric positional relationship between the first millimeter wave radar, the second millimeter wave radar and the target object is specifically defined.
  • the first millimeter wave radar, the second millimeter wave radar and the target object form a triangle in the same plane.
  • the distance between the first millimeter wave radar and the second millimeter wave radar reflects the length of the first side of the triangle.
  • the relative distances of the wave signal and the second echo signal respectively reflect the side lengths of the second side and the third side of the triangle.
  • the angle between the second side and the first side can use the relative angle corresponding to the first echo signal and the first installation
  • the included angle between the third side and the first side can be represented by the relative angle corresponding to the second echo signal and the second installation angle. Therefore, the first installation angle and the first installation angle can be calculated by the above geometric position relationship. 2. Installation angle.
  • the processor 206 determines the first installation angle of the first millimeter wave radar and the second installation angle of the second millimeter wave radar according to the first echo signal and the second echo signal when the processor 206 executes the computer instructions, Including: determining the first installation angle and the second installation angle according to the first echo signal and the second echo signal of different frames; calculating the average value of all the first installation angles as the final first installation angle; calculating all the first installation angles The average of the two installation angles is used as the final second installation angle.
  • the millimeter wave radar can continuously transmit radar signals, and then continuously receive echo signals.
  • first echo signal and the second echo signal received in different frames multiple groups of first installations can be determined respectively.
  • the angle and the second installation angle, and then the average of all calculation results are output as the final first installation angle and the second installation angle, which can reduce the installation angle deviation caused by the measurement error.
  • the processor 206 when the processor 206 executes the computer instructions, it also implements: for target objects located at different positions, repeatedly execute the control of the first millimeter wave radar and the second millimeter wave radar to transmit the first radar signal and the second radar signal, respectively. Step, and determine the corresponding first installation angle and second installation angle; calculate the average value of all first installation angles as the final first installation angle; calculate the average value of all second installation angles as the final second installation angle.
  • the position of the target object is further changed, and multiple sets of the first installation angle and the second installation angle are calculated for the target objects at different positions, and then the average of all calculation results is used as the final first installation
  • the angle and the second installation angle output can reduce the installation angle deviation caused by measurement error.
  • the target object moves between different positions in the overlapping area to obtain the first echo signal and the second echo signal of the target object in different positions.
  • one target object by moving the target object between different positions in the overlapping area, one target object can be used to obtain multiple sets of first echo signals and second echo signals, and then multiple sets of first installation angles can be determined And the second installation angle, reduce the installation angle deviation caused by measurement error.
  • the target object stays at each location for a preset period of time.
  • the target object is further allowed to stay at each position for a preset period of time, on the one hand, the automation of movement control is improved, on the other hand, multi-frame results can be obtained at each position, which enriches the number of samples.
  • the processor 206 determines the first installation angle and the second millimeter of the first millimeter-wave radar according to the first echo signal and the second echo signal when the computer instruction is executed.
  • the second installation angle of the wave radar includes: determining the corresponding first installation angle and second installation angle for the first echo signal and second echo signal of each target object; calculating the average value of all the first installation angles , As the final first installation angle; calculate the average of all the second installation angles, as the final second installation angle.
  • the number of target objects is specifically limited.
  • multiple sets of first echo signals and second echo signals can be obtained at the same time, which is equivalent to performing calculations for target objects at different positions at the same time.
  • It can not only increase the number of samples per unit time, but also reduce the requirements on the surrounding environment, that is, it is not necessary to clean the overlapping area to ensure that there is only one target object.
  • the echo signals of different frames can be further combined to further increase the number of samples.
  • the target object is a corner reflector or a static object placed in an open environment; the movable platform 200 is statically placed in an open environment.
  • both the target object and the movable platform 200 are statically placed in an open environment, that is, this embodiment provides a static calibration solution for the installation angle of the millimeter wave radar component 202. At this time, there are no other interference obstacles in the environment, and both the target object and the movable platform 200 are in a stable static state, which can improve the accuracy of the calibration result.
  • This solution is particularly suitable for the production test stage of the movable platform 200.
  • acquiring the first echo signal and the second echo signal of the target object when the processor 206 executes the computer instruction includes: receiving the first echo signal and the second echo signal of the same frame; One echo signal and the second echo signal respectively obtain corresponding detection information.
  • the detection information includes the relative distance and relative angle between the target point and the launch point; it will satisfy that the relative distance difference between the two is smaller than the radar distance resolution unit, The sum of the relative angles of the two is less than the first angle threshold, and the deviation of the relative angle between the two and the respective rough estimated installation angles is less than the second angle threshold.
  • a first echo signal and a second echo signal are recorded as the target The first echo signal and the second echo signal of the object.
  • This embodiment specifically defines a solution for determining a group of first echo signals and second echo signals.
  • receive the first echo signal and the second echo signal of the same frame to ensure the time consistency of the first echo signal and the second echo signal, and then screen out the first echo signal and the second echo signal for the same target object.
  • the second echo signal Specifically, the echo signal of the same frame is analyzed to obtain corresponding detection information, including the relative distance and relative angle between the target point and the emission point.
  • the target object is in the overlapping area, and the overlapping area is between the first millimeter wave radar and the second millimeter wave radar, and the range is not too large, it can be considered that the first echo signal and the second echo signal of the same target object
  • the detection information corresponding to the wave signal is approximately symmetrical with respect to the symmetry axis of the first millimeter wave radar and the second millimeter wave radar, that is, the relative distance difference between the two is very small, and the relative angle between the two should be the same because of the direction. Positive and negative, so the sum of the relative angles of the two is very small.
  • the radar range resolution unit and the first angle threshold are introduced respectively, and the difference of the relative distance can be considered to be smaller than the radar range resolution unit, and the sum of the relative angles is smaller than the first angle threshold
  • a first echo signal and a second echo signal of are the first echo signal and the second echo signal of the same target object.
  • the difference between the relative angle in the detection information and the installation angle of the corresponding radar should be equal to the angle between the line between the target point and the launch point and the aforementioned longitudinal direction, and overlap
  • the area is a small area between the first millimeter wave radar and the second millimeter wave radar, so the included angle should be a small value.
  • the first angle threshold is related to the installation angle consistency of the first millimeter wave radar and the second millimeter wave radar; and/or the second angle threshold is related to the installation angle of the first millimeter wave radar and the second millimeter wave radar Angular consistency is related.
  • the first angle threshold and/or the second angle threshold are related to the consistency of the installation angles of the first millimeter wave radar and the second millimeter wave radar.
  • the more consistent the installation angle of the first millimeter wave radar and the second millimeter wave radar, the more symmetrical the millimeter wave radars emitted by the first millimeter wave radar and the second millimeter wave radar, the first echo signal and the second echo signal The closer the corresponding relative angles are, the closer the rough installation angles of the first millimeter-wave radar and the second millimeter-wave radar are, and the smaller the value of the first angle threshold and/or the second angle threshold, the specific values can be combined with experiments get.
  • the first angle threshold is less than 10°
  • the second angle threshold is less than 10°.
  • the target object is an object detected by the movable platform 200 during the movement.
  • the movable platform 200 is in a moving state, and the target object is an object detected by the movable platform 200 during its movement. That is, this embodiment provides a dynamic calibration solution for the installation angle of the millimeter wave radar component 202 .
  • the first echo signal and the second echo signal of the same frame are received, since the time difference between the corresponding radar signals reaching the obstacle is small, it can be approximated that the target object and the movable platform 200 are in a relatively static state, and Based on this, subsequent data processing is performed.
  • This solution can be run after the movable platform 200 is completed and put into use, which expands the applicable time.
  • the processor 206 when the processor 206 executes computer instructions, it also implements: detecting the first candidate object in the first echo signal and the second candidate object in the second echo signal; acquiring the first detection of the first candidate object Information, the first detection information includes the relative distance and relative angle between the first candidate object and the first millimeter wave radar; the second detection information of the second candidate object is acquired, and the second detection information includes the second candidate object and the second millimeter The relative distance and relative angle between wave radars; according to the first detection information and the second detection information, it is determined that the first candidate object and the second candidate object are the same object and the target object.
  • the first echo signal and second echo signal of the same frame need to be received first, and then the corresponding first detection information and second detection information are analyzed, and then the corresponding first candidate object and In the case of the second candidate object, if it is determined that the first candidate object and the second candidate object are the same object, it indicates that the corresponding first echo signal and second echo signal are both from the target object, and subsequent calibration calculations can be performed to ensure The accuracy of the calibration results.
  • the processor 206 determines that the first candidate object and the second candidate object are the same object and the target object according to the first detection information and the second detection information when the computer instruction is executed, including: The detection information, the second detection information, the rough estimated installation angle of the first millimeter wave radar and the rough estimated installation angle of the second millimeter wave radar determine the positions of the first candidate object and the second candidate object; determine the first candidate whose distance is less than the preset distance The object and the second candidate object are the same object and are the target object.
  • the first candidate object and the second candidate object are the same object.
  • the first echo signal corresponding to each first echo signal can be calculated.
  • the positions of the first candidate object and the second candidate object that are the same object should coincide, but because of the calculation used
  • the installation angle is roughly estimated, so there will be errors in the calculation results, but the difference is not too large.
  • the distance between each first candidate object and each second candidate object is calculated separately, and the distance is smaller than the preset distance.
  • the first candidate object and the second candidate object are determined to be the same object, that is, the target object, which ensures the smooth operation of the scheme.
  • the memory involved in the second aspect and the third aspect may include a large-capacity memory for data or instructions.
  • the storage may include hard disk drives (Hard Disk Drive, HDD), floppy disk drives, flash memory, optical disks, magneto-optical disks, magnetic tapes or Universal Serial Bus (USB) drives or two or more A combination of these.
  • the storage may include removable or non-removable (or fixed) media.
  • the memory can be inside or outside the integrated gateway disaster recovery device.
  • the memory is a non-volatile solid state memory.
  • the memory includes read only memory (ROM).
  • the ROM may be mask-programmed ROM, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), electrically rewriteable ROM (EAROM) or flash memory or A combination of two or more of these.
  • the processors involved in the second and third aspects may include a central processing unit (CPU), or a specific integrated circuit (Application Specific Integrated Circuit, ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application .
  • CPU central processing unit
  • ASIC Application Specific Integrated Circuit
  • the embodiment of the fourth aspect of the present application provides a computer-readable storage medium on which a computer program is stored.
  • the computer program is executed by a processor, the installation angle of the millimeter wave radar component as described in any of the embodiments is realized.
  • the steps of the calibration method have the beneficial effects of the calibration method of the installation angle of the millimeter wave radar component, and will not be repeated here.
  • a computer-readable storage medium may include any medium capable of storing or transmitting information.
  • Examples of computer-readable storage media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, and so on.
  • the code segment can be downloaded via a computer network such as the Internet, an intranet, etc.
  • the term “plurality” refers to two or more than two, unless specifically defined otherwise.
  • the terms “installed”, “connected”, “connected”, “fixed” and other terms should be understood in a broad sense.
  • “connected” can be a fixed connection, a detachable connection, or an integral connection;
  • “connected” can be It is directly connected or indirectly connected through an intermediary.
  • the specific meanings of the above terms in this application can be understood according to specific circumstances.

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Abstract

提供了一种毫米波雷达组件安装角度的标定方法及系统、可移动平台,其中,毫米波雷达组件(202)用于可移动平台(200),毫米波雷达组件(202)包括用于发射第一雷达信号及接收第一回波信号的第一毫米波雷达,以及用于发射第二雷达信号及接收第二回波信号的第二毫米波雷达,第一毫米波雷达和第二毫米波雷达的探测范围存在重叠区域,毫米波雷达组件(202)安装角度的标定方法包括:控制第一毫米波雷达和第二毫米波雷达分别发射第一雷达信号和第二雷达信号(S102);获取目标物体的第一回波信号和第二回波信号(S104);根据第一回波信号和第二回波信号确定第一毫米波雷达的第一安装角度和第二毫米波雷达的第二安装角度(S106)。该方案简化了安装角度标定的流程。

Description

毫米波雷达组件安装角度的标定方法及系统、可移动平台 技术领域
本申请涉及车载雷达技术领域,具体而言,涉及一种毫米波雷达组件安装角度的标定方法、一种毫米波雷达组件安装角度的标定系统、一种可移动平台及一种计算机可读存储介质。
背景技术
随着车载毫米波雷达相关技术的迅速发展,车载毫米波雷达已成为辅助驾驶和自动驾驶领域必不可少的传感器之一。目前车载毫米波雷达主要采用的安装方案有1+2方案和1+4方案,方案中的2和4指的是角雷达的数目,角雷达因其功能需求多采用较宽的波束覆盖范围,并且为了覆盖关注区域一般采用双雷达方案。例如,在角雷达的数目为2时,可在车尾对称安装两个后向角雷达,主要用于观测车辆后方区域,实现盲区检测、变道辅助、后向碰撞预警等;在角雷达的数目为4时,可在车头和车尾分别对称安装两个角雷达。由于角雷达安装有一定的角度,在无法获取准确的水平安装角度的情况下,角雷达将无法提供准确的目标相对于自车的距离及速度,角雷达相关功能将受到影响。
传统的角雷达水平安装角度采用机械校准方案,而由于角雷达一般装于车辆保险杆内部,标定安装角度时需拆装保险杆,非常麻烦。
发明内容
本申请旨在至少解决现有技术或相关技术中存在的技术问题之一。
为此,本申请的第一方面提出了一种毫米波雷达组件安装角度的标定方法。
本申请的第二方面提出了一种毫米波雷达组件安装角度的标定系统。
本申请的第三方面提出了一种可移动平台。
本申请的第四方面提出了一种计算机可读存储介质。
有鉴于此,根据本申请的第一方面,提供了一种毫米波雷达组件安装角度的标定方法,毫米波雷达组件用于可移动平台,毫米波雷达组件包括第一毫米波雷达和第二毫米波雷达,第一毫米波雷达用于发射第一雷达信号及接收第一回波信号,第二毫米波雷达用于发射第二雷达信号及接收第二回波信号,第一毫米波雷达和第二毫米波雷达的探测范围存在重叠区域,毫米波雷达组件安装角度的标定方法包括:控制第一毫米波雷达和第二毫米波雷达分别发射第一雷达信号和第二雷达信号;获取目标物体的第一回波信号和第二回波信号;根据第一回波信号和第二回波信号确定第一毫米波雷达的第一安装角度和第二毫米波雷达的第二安装角度。
另外,根据本申请提供的上述技术方案中的毫米波雷达组件安装角度的标定方法,还可以具有如下附加技术特征:
在上述技术方案中,优选地,第一安装角度和第二安装角度为同一方向上的安装角度。
在上述任一技术方案中,优选地,根据第一回波信号和第二回波信号确定第一毫米波雷达的第一安装角度和第二毫米波雷达的第二安装角度,包括:根据第一回波信号和第二回波信号分别获得相应的探测信息,探测信息包括目标物体与发射点之间的相对距离和相对角度;根据第一毫米波雷达和第二毫米波雷达的间距、第一回波信号对应的相对距离和相对角度、第二回波信号对应的相对距离和相对角度、第一安装角度、第二安装角度之间的几何关系,确定第一安装角度和第二安装角度。
在上述任一技术方案中,优选地,根据第一毫米波雷达和第二毫米波雷达的间距、第一回波信号对应的相对距离和相对角度、第二回波信号对应的相对距离和相对角度、第一安装角度、第二安装角度之间的几何关系,确定第一安装角度和第二安装角度,包括:以第一毫米波雷达和第二毫米波雷达之间的连线方向为横向,以横向的垂直方向为纵向,利用第一回波信号对应的相对距离在横向上的分量与第二回波信号对应的相对距离在横向上的分量之和等于第一毫米波雷达和第二毫米波雷达的间距,第一回波信号对应的相对距离在纵向上的分量与第二回波信号对应的相对距离在纵 向上的分量相等,确定第一安装角度和第二安装角度。
在上述任一技术方案中,优选地,毫米波雷达组件安装角度的标定方法还包括:根据不同帧的第一回波信号和第二回波信号分别确定第一安装角度和第二安装角度,和/或针对位于不同位置的目标物体,重复执行控制第一毫米波雷达和第二毫米波雷达分别发射第一雷达信号和第二雷达信号的步骤,并确定相应的第一安装角度和第二安装角度;计算全部第一安装角度的平均值,作为最终的第一安装角度;计算全部第二安装角度的平均值,作为最终的第二安装角度。
在上述任一技术方案中,优选地,目标物体在重叠区域内的不同位置之间移动,以获取不同位置的目标物体的第一回波信号和第二回波信号。
在上述任一技术方案中,优选地,目标物体在每个位置停留预设时长。
在上述任一技术方案中,优选地,目标物体的数量为多个,根据第一回波信号和第二回波信号确定第一毫米波雷达的第一安装角度和第二毫米波雷达的第二安装角度,包括:针对每个目标物体的第一回波信号和第二回波信号,确定相应的第一安装角度和第二安装角度;计算全部第一安装角度的平均值,作为最终的第一安装角度;计算全部第二安装角度的平均值,作为最终的第二安装角度。
在上述任一技术方案中,优选地,目标物体为置于空旷环境中的角反射器或静态物体;可移动平台静置于空旷环境中。
在上述任一技术方案中,优选地,获取目标物体的第一回波信号和第二回波信号包括:接收同一帧的第一回波信号和第二回波信号;根据第一回波信号和第二回波信号分别获得相应的探测信息,探测信息包括目标点与发射点之间的相对距离和相对角度;将同时满足二者的相对距离之差小于雷达距离分辨单元、二者的相对角度之和小于第一角度门限、二者的相对角度与各自对应的粗估安装角度的偏差均小于第二角度门限的一个第一回波信号和一个第二回波信号记为目标物体的第一回波信号和第二回波信号。
在上述任一技术方案中,优选地,第一角度门限与第一毫米波雷达和第二毫米波雷达的安装角一致性相关;和/或第二角度门限与第一毫米波雷 达和第二毫米波雷达的安装角一致性相关。
在上述任一技术方案中,优选地,第一角度门限小于10°;和/或第二角度门限小于10°。
在上述任一技术方案中,优选地,目标物体为可移动平台在移动过程中检测到的物体。
在上述任一技术方案中,优选地,毫米波雷达组件安装角度的标定方法还包括:检测第一回波信号中的第一候选物体和第二回波信号中的第二候选物体;获取第一候选物体的第一探测信息,第一探测信息包括第一候选物体与第一毫米波雷达之间的相对距离和相对角度;获取第二候选物体的第二探测信息,第二探测信息包括第二候选物体与第二毫米波雷达之间的相对距离和相对角度;根据第一探测信息和第二探测信息,确定第一候选物体和第二候选物体为同一物体,且为目标物体。
在上述任一技术方案中,优选地,根据第一探测信息和第二探测信息,确定第一候选物体和第二候选物体为同一物体,且为目标物体,包括:根据第一探测信息、第二探测信息、第一毫米波雷达的粗估安装角度和第二毫米波雷达的粗估安装角度确定第一候选物体和第二候选物体的位置;确定间距小于预设间距的第一候选物体和第二候选物体为同一物体,且为目标物体。
根据本申请的第二方面,提供了一种毫米波雷达组件安装角度的标定系统,毫米波雷达组件用于可移动平台,毫米波雷达组件包括第一毫米波雷达和第二毫米波雷达,第一毫米波雷达用于发射第一雷达信号及接收第一回波信号,第二毫米波雷达用于发射第二雷达信号及接收第二回波信号,第一毫米波雷达和第二毫米波雷达的探测范围存在重叠区域,毫米波雷达组件的标定系统包括存储器和处理器,存储器被配置为存储计算机指令;处理器被配置为执行计算机指令以实现:控制第一毫米波雷达和第二毫米波雷达分别发射第一雷达信号和第二雷达信号;获取目标物体的第一回波信号和第二回波信号;根据第一回波信号和第二回波信号确定第一毫米波雷达的第一安装角度和第二毫米波雷达的第二安装角度。
另外,根据本申请提供的上述技术方案中的毫米波雷达组件安装角度 的标定系统,还可以具有如下附加技术特征:
在上述技术方案中,优选地,第一安装角度和第二安装角度为同一方向上的安装角度。
在上述任一技术方案中,优选地,处理器执行计算机指令时实现的根据第一回波信号和第二回波信号确定第一毫米波雷达的第一安装角度和第二毫米波雷达的第二安装角度,包括:根据第一回波信号和第二回波信号分别获得相应的探测信息,探测信息包括目标物体与发射点之间的相对距离和相对角度;根据第一毫米波雷达和第二毫米波雷达的间距、第一回波信号对应的相对距离和相对角度、第二回波信号对应的相对距离和相对角度、第一安装角度、第二安装角度之间的几何关系,确定第一安装角度和第二安装角度。
在上述任一技术方案中,优选地,处理器执行计算机指令时实现的根据第一毫米波雷达和第二毫米波雷达的间距、第一回波信号对应的相对距离和相对角度、第二回波信号对应的相对距离和相对角度、第一安装角度、第二安装角度之间的几何关系,确定第一安装角度和第二安装角度,包括:以第一毫米波雷达和第二毫米波雷达之间的连线方向为横向,以横向的垂直方向为纵向,利用第一回波信号对应的相对距离在横向上的分量与第二回波信号对应的相对距离在横向上的分量之和等于第一毫米波雷达和第二毫米波雷达的间距,第一回波信号对应的相对距离在纵向上的分量与第二回波信号对应的相对距离在纵向上的分量相等,确定第一安装角度和第二安装角度。
在上述任一技术方案中,优选地,处理器执行计算机指令时还实现:根据不同帧的第一回波信号和第二回波信号分别确定第一安装角度和第二安装角度,和/或针对位于不同位置的目标物体,重复执行控制第一毫米波雷达和第二毫米波雷达分别发射第一雷达信号和第二雷达信号的步骤,并确定相应的第一安装角度和第二安装角度;计算全部第一安装角度的平均值,作为最终的第一安装角度;计算全部第二安装角度的平均值,作为最终的第二安装角度。
在上述任一技术方案中,优选地,目标物体在重叠区域内的不同位置 之间移动,以获取不同位置的目标物体的第一回波信号和第二回波信号。
在上述任一技术方案中,优选地,目标物体在每个位置停留预设时长。
在上述任一技术方案中,优选地,目标物体的数量为多个,处理器执行计算机指令时实现的根据第一回波信号和第二回波信号确定第一毫米波雷达的第一安装角度和第二毫米波雷达的第二安装角度,包括:针对每个目标物体的第一回波信号和第二回波信号,确定相应的第一安装角度和第二安装角度;计算全部第一安装角度的平均值,作为最终的第一安装角度;计算全部第二安装角度的平均值,作为最终的第二安装角度。
在上述任一技术方案中,优选地,目标物体为置于空旷环境中的角反射器或静态物体;可移动平台静置于空旷环境中。
在上述任一技术方案中,优选地,处理器执行计算机指令时实现的获取目标物体的第一回波信号和第二回波信号包括:接收同一帧的第一回波信号和第二回波信号;根据第一回波信号和第二回波信号分别获得相应的探测信息,探测信息包括目标点与发射点之间的相对距离和相对角度;将同时满足二者的相对距离之差小于雷达距离分辨单元、二者的相对角度之和小于第一角度门限、二者的相对角度与各自对应的粗估安装角度的偏差均小于第二角度门限的一个第一回波信号和一个第二回波信号记为目标物体的第一回波信号和第二回波信号。
在上述任一技术方案中,优选地,第一角度门限与第一毫米波雷达和第二毫米波雷达的安装角一致性相关;和/或第二角度门限与第一毫米波雷达和第二毫米波雷达的安装角一致性相关。
在上述任一技术方案中,优选地,第一角度门限小于10°;和/或第二角度门限小于10°。
在上述任一技术方案中,优选地,目标物体为可移动平台在移动过程中检测到的物体。
在上述任一技术方案中,优选地,处理器执行计算机指令时还实现:检测第一回波信号中的第一候选物体和第二回波信号中的第二候选物体;获取第一候选物体的第一探测信息,第一探测信息包括第一候选物体与第一毫米波雷达之间的相对距离和相对角度;获取第二候选物体的第二探测 信息,第二探测信息包括第二候选物体与第二毫米波雷达之间的相对距离和相对角度;根据第一探测信息和第二探测信息,确定第一候选物体和第二候选物体为同一物体,且为目标物体。
在上述任一技术方案中,优选地,处理器执行计算机指令时实现的根据第一探测信息和第二探测信息,确定第一候选物体和第二候选物体为同一物体,且为目标物体,包括:根据第一探测信息、第二探测信息、第一毫米波雷达的粗估安装角度和第二毫米波雷达的粗估安装角度确定第一候选物体和第二候选物体的位置;确定间距小于预设间距的第一候选物体和第二候选物体为同一物体,且为目标物体。
根据本申请的第三方面,提供了一种可移动平台,可移动平台包括毫米波雷达组件、存储器和处理器,毫米波雷达组件包括第一毫米波雷达和第二毫米波雷达,第一毫米波雷达用于发射第一雷达信号及接收第一回波信号,第二毫米波雷达用于发射第二雷达信号及接收第二回波信号,第一毫米波雷达和第二毫米波雷达的探测范围存在重叠区域;存储器被配置为存储计算机指令;处理器被配置为执行计算机指令以实现:控制第一毫米波雷达和第二毫米波雷达分别发射第一雷达信号和第二雷达信号;获取目标物体的第一回波信号和第二回波信号;根据第一回波信号和第二回波信号确定第一毫米波雷达的第一安装角度和第二毫米波雷达的第二安装角度。
另外,根据本申请提供的上述技术方案中的可移动平台,还可以具有如下附加技术特征:
在上述技术方案中,优选地,第一安装角度和第二安装角度为同一方向上的安装角度。
在上述任一技术方案中,优选地,处理器执行计算机指令时实现的根据第一回波信号和第二回波信号确定第一毫米波雷达的第一安装角度和第二毫米波雷达的第二安装角度,包括:根据第一回波信号和第二回波信号分别获得相应的探测信息,探测信息包括目标物体与发射点之间的相对距离和相对角度;根据第一毫米波雷达和第二毫米波雷达的间距、第一回波信号对应的相对距离和相对角度、第二回波信号对应的相对距离和相对角 度、第一安装角度、第二安装角度之间的几何关系,确定第一安装角度和第二安装角度。
在上述任一技术方案中,优选地,处理器执行计算机指令时实现的根据第一毫米波雷达和第二毫米波雷达的间距、第一回波信号对应的相对距离和相对角度、第二回波信号对应的相对距离和相对角度、第一安装角度、第二安装角度之间的几何关系,确定第一安装角度和第二安装角度,包括:以第一毫米波雷达和第二毫米波雷达之间的连线方向为横向,以横向的垂直方向为纵向,利用第一回波信号对应的相对距离在横向上的分量与第二回波信号对应的相对距离在横向上的分量之和等于第一毫米波雷达和第二毫米波雷达的间距,第一回波信号对应的相对距离在纵向上的分量与第二回波信号对应的相对距离在纵向上的分量相等,确定第一安装角度和第二安装角度。
在上述任一技术方案中,优选地,处理器执行计算机指令时还实现:根据不同帧的第一回波信号和第二回波信号分别确定第一安装角度和第二安装角度,和/或针对位于不同位置的目标物体,重复执行控制第一毫米波雷达和第二毫米波雷达分别发射第一雷达信号和第二雷达信号的步骤,并确定相应的第一安装角度和第二安装角度;计算全部第一安装角度的平均值,作为最终的第一安装角度;计算全部第二安装角度的平均值,作为最终的第二安装角度。
在上述任一技术方案中,优选地,目标物体在重叠区域内的不同位置之间移动,以获取不同位置的目标物体的第一回波信号和第二回波信号。
在上述任一技术方案中,优选地,目标物体在每个位置停留预设时长。
在上述任一技术方案中,优选地,目标物体的数量为多个,处理器执行计算机指令时实现的根据第一回波信号和第二回波信号确定第一毫米波雷达的第一安装角度和第二毫米波雷达的第二安装角度,包括:针对每个目标物体的第一回波信号和第二回波信号,确定相应的第一安装角度和第二安装角度;计算全部第一安装角度的平均值,作为最终的第一安装角度;计算全部第二安装角度的平均值,作为最终的第二安装角度。
在上述任一技术方案中,优选地,目标物体为置于空旷环境中的角反 射器或静态物体;可移动平台静置于空旷环境中。
在上述任一技术方案中,优选地,处理器执行计算机指令时实现的获取目标物体的第一回波信号和第二回波信号包括:接收同一帧的第一回波信号和第二回波信号;根据第一回波信号和第二回波信号分别获得相应的探测信息,探测信息包括目标点与发射点之间的相对距离和相对角度;将同时满足二者的相对距离之差小于雷达距离分辨单元、二者的相对角度之和小于第一角度门限、二者的相对角度与各自对应的粗估安装角度的偏差均小于第二角度门限的一个第一回波信号和一个第二回波信号记为目标物体的第一回波信号和第二回波信号。
在上述任一技术方案中,优选地,第一角度门限与第一毫米波雷达和第二毫米波雷达的安装角一致性相关;和/或第二角度门限与第一毫米波雷达和第二毫米波雷达的安装角一致性相关。
在上述任一技术方案中,优选地,第一角度门限小于10°;和/或第二角度门限小于10°。
在上述任一技术方案中,优选地,目标物体为可移动平台在移动过程中检测到的物体。
在上述任一技术方案中,优选地,处理器执行计算机指令时还实现:检测第一回波信号中的第一候选物体和第二回波信号中的第二候选物体;获取第一候选物体的第一探测信息,第一探测信息包括第一候选物体与第一毫米波雷达之间的相对距离和相对角度;获取第二候选物体的第二探测信息,第二探测信息包括第二候选物体与第二毫米波雷达之间的相对距离和相对角度;根据第一探测信息和第二探测信息,确定第一候选物体和第二候选物体为同一物体,且为目标物体。
在上述任一技术方案中,优选地,处理器执行计算机指令时实现的根据第一探测信息和第二探测信息,确定第一候选物体和第二候选物体为同一物体,且为目标物体,包括:根据第一探测信息、第二探测信息、第一毫米波雷达的粗估安装角度和第二毫米波雷达的粗估安装角度确定第一候选物体和第二候选物体的位置;确定间距小于预设间距的第一候选物体和第二候选物体为同一物体,且为目标物体。
根据本申请的第四方面,提供了一种计算机可读存储介质,其上存储有计算机程序,计算机程序被处理器执行时实现如所述任一技术方案所述的毫米波雷达组件安装角度的标定方法的步骤。
毫米波雷达设置为角雷达时,因其功能需求,一般波束较宽,因此一对角雷达通常存在波束覆盖范围重叠区域。本申请实施例提供了一种毫米波雷达组件安装角度的标定方案,正是利用了毫米波雷达组件的第一毫米波雷达和第二毫米波雷达的探测范围重叠区域。毫米波雷达发射的雷达信号在遇到障碍物后会反射形成回波信号,回波信号同时受到障碍物的位置和毫米波雷达的安装角度这两个因素的影响,可利用其中的任一因素来表示另一因素,但在其中任一因素不确定的情况下,所得到的另一因素并不准确。本申请提供的方法获取上述重叠区域内的一个目标物体的第一回波信号和第二回波信号,则第一回波信号和第二回波信号所反映的就是同一个障碍物(即该目标物体)的位置,也就是存在相同的位置因素,可借此分析第一回波信号和第二回波信号,并得出第一毫米波雷达的第一安装角度和第二毫米波雷达的第二安装角度。本申请采用信号处理方式,避免了传统机械校准的复杂操作,从而大幅简化了安装角度标定的流程,大为降低了标定复杂程度,大大降低所需人力及时间成本。
本申请的附加方面和优点将在下面的描述部分中变得明显,或通过本申请的实践了解到。
附图说明
本申请的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解,其中:
图1示出了本申请的一个实施例的毫米波雷达组件安装角度的标定方法的示意流程图;
图2示出了本申请的一个实施例的毫米波雷达组件安装角度的标定方法的原理图;
图3示出了本申请的一个实施例的毫米波雷达组件安装角度的标定系统的结构示意图;
图4示出了本申请的一个实施例的可移动平台的结构示意图。
具体实施方式
为了能够更清楚地理解本申请的上述目的、特征和优点,下面结合附图和具体实施方式对本申请进行进一步的详细描述。需要说明的是,在不冲突的情况下,本申请的实施例及实施例中的特征可以相互组合。
在下面的描述中阐述了很多具体细节以便于充分理解本申请,但是,本申请还可以采用其他不同于在此描述的其他方式来实施,因此,本申请的保护范围并不受下面公开的具体实施例的限制。
本申请第一方面的实施例提供了一种毫米波雷达组件安装角度的标定方法,毫米波雷达组件用于可移动平台(例如车辆、无人飞行器等),毫米波雷达组件包括第一毫米波雷达和第二毫米波雷达,第一毫米波雷达用于发射第一雷达信号及接收第一回波信号,第二毫米波雷达用于发射第二雷达信号及接收第二回波信号,第一毫米波雷达和第二毫米波雷达的探测范围存在重叠区域。例如,当毫米波雷达组件用于车辆上时,其可以为安装于车左前方和车右前方的两个毫米波雷达,该两个毫米波雷达分别用于探测车辆左前方和右前方的环境状况,并且在车辆正前方存在着重叠区域,从而可以完整地探测车辆前方的状况而不遗漏特定的区域,为车辆的辅助驾驶或自动驾驶提供更好的环境感知功能。当毫米波雷达组件用于无人飞行器上时,其可以为安装在无人飞行器前下方和后下方的两个毫米波雷达,该两个毫米波雷达分别用于探测无人飞行器前下方和后下方的环境状况,并且在无人飞行器正下方存在着重叠区域,从而可以完整地探测无人飞行器下方的环境而不遗漏特定的区域,为无人飞行器的飞行控制提供更好的环境感知功能。可以理解的是,毫米波雷达组件也可以用于其他可移动平台上,本申请对此并不作限制。
下文将以车辆为例,具体对本申请的实施例进行说明。
图1示出了本申请的一个实施例的毫米波雷达组件安装角度的标定方法的示意流程图。
如图1所示,该毫米波雷达组件安装角度的标定方法包括:
S102,控制第一毫米波雷达和第二毫米波雷达分别发射第一雷达信号和第二雷达信号;
S104,获取目标物体的第一回波信号和第二回波信号;
S106,根据第一回波信号和第二回波信号确定第一毫米波雷达的第一安装角度和第二毫米波雷达的第二安装角度。
毫米波雷达设置为角雷达时,因其功能需求,一般波束较宽,因此一对角雷达通常存在波束覆盖范围重叠区域。本申请实施例提供的毫米波雷达组件安装角度的标定方法,正是利用了毫米波雷达组件的第一毫米波雷达和第二毫米波雷达的探测范围重叠区域。毫米波雷达发射的雷达信号在遇到障碍物后会反射形成回波信号,回波信号同时受到障碍物的位置和毫米波雷达的安装角度这两个因素的影响,可利用其中的任一因素来表示另一因素,但在其中任一因素不确定的情况下,所得到的另一因素并不准确。本申请提供的方法获取上述重叠区域内的一个目标物体的第一回波信号和第二回波信号,则第一回波信号和第二回波信号所反映的就是同一个障碍物(即该目标物体)的位置,也就是存在相同的位置因素,可借此分析第一回波信号和第二回波信号,并得出第一毫米波雷达的第一安装角度和第二毫米波雷达的第二安装角度。本申请采用信号处理方式,避免了传统机械校准的复杂操作,从而大幅简化了安装角度标定的流程,大为降低了标定复杂程度,大大降低所需人力及时间成本。可以理解的是,本申请并不限于毫米波雷达,而适用于任何两个存在重叠区域的雷达的安装角度的标定。
在一些实施例中,第一安装角度和第二安装角度为同一方向上的安装角度。
雷达的安装角度是其安装面相对于某一方向的偏转角度。在该实施例中,通过限定第一安装角度和第二安装角度在方向上的一致性,也就是限定了二者是第一毫米波雷达的安装面和第二毫米波雷达的安装面相对于同一个方向的偏转角度,例如图2所述,第一安装角度β M就是第一毫米波雷达的安装面相对于水平方向(即图中的x轴)的偏转角度,第二安装角度β S就是第二毫米波雷达的安装面相对于水平方向的偏转角度,有助于确保利 用重叠区域进行安装角度标定时的标定结果的准确性。
在一些实施例中,根据第一回波信号和第二回波信号确定第一毫米波雷达的第一安装角度和第二毫米波雷达的第二安装角度,包括:根据第一回波信号和第二回波信号分别获得相应的探测信息,探测信息包括目标物体与发射点之间的相对距离和相对角度;根据第一毫米波雷达和第二毫米波雷达的间距、第一回波信号对应的相对距离和相对角度、第二回波信号对应的相对距离和相对角度、第一安装角度、第二安装角度之间的几何关系,确定第一安装角度和第二安装角度。
在该实施例中,重叠区域内的目标物体被第一毫米波雷达和第二毫米波雷达同时观测到,利用雷达测量相对距离和相对角度,结合几何关系,可以解算出两个毫米波雷达的安装角度。该实施例通过数据处理解算的方式准确获取毫米波雷达的安装角度,避免了传统机械校准的复杂操作,从而大幅简化了安装角度标定的流程,大为降低了标定复杂程度,大大降低所需人力及时间成本。
在一些实施例中,根据第一毫米波雷达和第二毫米波雷达的间距、第一回波信号对应的相对距离和相对角度、第二回波信号对应的相对距离和相对角度、第一安装角度、第二安装角度之间的几何关系,确定第一安装角度和第二安装角度,包括:以第一毫米波雷达和第二毫米波雷达之间的连线方向为横向,以横向的垂直方向为纵向,利用第一回波信号对应的相对距离在横向上的分量与第二回波信号对应的相对距离在横向上的分量之和等于第一毫米波雷达和第二毫米波雷达的间距,第一回波信号对应的相对距离在纵向上的分量与第二回波信号对应的相对距离在纵向上的分量相等,确定第一安装角度和第二安装角度。
在该实施例中,具体限定了如何表达第一毫米波雷达、第二毫米波雷达和目标物体之间的几何位置关系。第一毫米波雷达、第二毫米波雷达和目标物体在同一平面内围成一个三角形,第一毫米波雷达和第二毫米波雷达的间距反映三角形的第一条边的边长,第一回波信号和第二回波信号各自对应的相对距离则分别反映三角形的第二条边和第三条边的边长。由于三角形的任意两条边在另一边上的投影长度之和等于另一边的长度,而第 二条边与第一条边的夹角可以利用第一回波信号对应的相对角度和第一安装角度来表示,第三条边与第一条边的夹角可以利用第二回波信号对应的相对角度和第二安装角度来表示,因此可以通过上述几何位置关系计算出第一安装角度和第二安装角度。
接下来结合图2介绍上述计算原理。如图2所示,以第一毫米波雷达和第二毫米波雷达之间的连线为车身坐标系的x轴,以车辆自身中轴线为y轴,d为单个毫米波雷达至车身坐标系原点o的距离,β M为第一安装角度,即第一毫米波雷达的安装面与x轴的夹角,β S为第二安装角度,即第二毫米波雷达的安装面与x轴的夹角。假设一个目标物体位于车身坐标系下的(x,y)点,(r MM)和(r SS)分别为第一毫米波雷达和第二毫米波雷达在雷达自身极坐标系下获取的相对距离及相对角度。根据几何关系可得
Figure PCTCN2019093624-appb-000001
其中的各个角度为带有方向的值,即有正负之分,并非绝对值。
联合上式可得
Figure PCTCN2019093624-appb-000002
其中,第一个等式相当于表达了第一回波信号对应的相对距离在横向上的分量-r M×sin(α MM)与第二回波信号对应的相对距离在横向上的分量r S×sin(α SS)之和等于第一毫米波雷达和第二毫米波雷达的间距2d,第二个等式表达了第一回波信号对应的相对距离在纵向上的分量r M×cos(α MM)与第二回波信号对应的相对距离在纵向上的分量r S×cos(α SS)相等。
经过变换可得
Figure PCTCN2019093624-appb-000003
显然,上式中除了β M和β S外,其余信息均可通过简单测量获得。
在一些实施例中,根据第一回波信号和第二回波信号确定第一毫米波雷达的第一安装角度和第二毫米波雷达的第二安装角度,包括:根据不同帧的第一回波信号和第二回波信号分别确定第一安装角度和第二安装角度;计算全部第一安装角度的平均值,作为最终的第一安装角度;计算全部第二安装角度的平均值,作为最终的第二安装角度。
在该实施例中,毫米波雷达可以连续发射雷达信号,进而连续接收回波信号,利用在不同帧接收到的第一回波信号和第二回波信号,可以分别确定出多组第一安装角度和第二安装角度,再将所有计算结果的平均值作为最终的第一安装角度和第二安装角度输出,可以降低测量误差带来的安装角度偏差。
在一些实施例中,毫米波雷达组件安装角度的标定方法还包括:针对位于不同位置的目标物体,重复执行控制第一毫米波雷达和第二毫米波雷达分别发射第一雷达信号和第二雷达信号的步骤,并确定相应的第一安装角度和第二安装角度;计算全部第一安装角度的平均值,作为最终的第一安装角度;计算全部第二安装角度的平均值,作为最终的第二安装角度。
在该实施例中,进一步改变目标物体的位置,针对位于不同位置的目标物体,分别计算出多组第一安装角度和第二安装角度,再将所有计算结果的平均值作为最终的第一安装角度和第二安装角度输出,可以降低测量误差带来的安装角度偏差。
可以想到的是,可结合不同位置的目标物体在不同帧的第一回波信号和第二回波信号来确定第一安装角度和第二安装角度,此时多个位置多帧结果联合处理,可进一步降低测量误差带来的安装角度偏差。
在一些实施例中,目标物体在重叠区域内的不同位置之间移动,以获取不同位置的目标物体的第一回波信号和第二回波信号。
在该实施例中,通过令目标物体在重叠区域内的不同位置之间移动,可以利用一个目标物体获得多组第一回波信号和第二回波信号,进而确定出多组第一安装角度和第二安装角度,降低测量误差带来的安装角度偏差。
在一些实施例中,目标物体在每个位置停留预设时长。
在该实施例中,进一步令目标物体在每个位置停留预设时长,一方面 提高了移动控制的自动化,另一方面可在每个位置获得多帧结果,丰富了样本数量。可选地,目标物体在每个位置停留的预设时长均相等,例如10s或15s,既便于控制,又保证了每个位置处得到的计算结果数量相等,使得不同位置处的计算结果对最终的计算结果的影响一致。
在一些实施例中,目标物体的数量为多个,根据第一回波信号和第二回波信号确定第一毫米波雷达的第一安装角度和第二毫米波雷达的第二安装角度,包括:针对每个目标物体的第一回波信号和第二回波信号,确定相应的第一安装角度和第二安装角度;计算全部第一安装角度的平均值,作为最终的第一安装角度;计算全部第二安装角度的平均值,作为最终的第二安装角度。
在该实施例中,具体限定了目标物体的数量为多个的情况,此时可同时得到多组第一回波信号和第二回波信号,相当于同时针对不同位置的目标物体执行了计算,既可提高单位时间内的采样数量,又降低了对周围环境的要求,即不必清理重叠区域,以保证只存在一个目标物体。同上,可进一步结合不同帧的回波信号,进一步增加采样数量。
在一些实施例中,目标物体为置于空旷环境中的角反射器或静态物体;车辆静置于空旷环境中。
在该实施例中,目标物体和车辆均静置于空旷环境中,即该实施例提供了一种毫米波雷达组件的安装角度的静态标定方案。此时环境中没有其他干扰障碍物,且目标物体和车辆都处于稳定的静置状态,可以提高标定结果的准确度。具体地,目标物体可以为角反射器,以提高回波信号的强度,也可以为普通的静态物体。该方案尤其适合于车辆生产测试阶段。
在一些实施例中,获取目标物体的第一回波信号和第二回波信号包括:接收同一帧的第一回波信号和第二回波信号;根据第一回波信号和第二回波信号分别获得相应的探测信息,探测信息包括目标点与发射点之间的相对距离和相对角度;将同时满足二者的相对距离之差小于雷达距离分辨单元、二者的相对角度之和小于第一角度门限、二者的相对角度与各自对应的粗估安装角度的偏差均小于第二角度门限的一个第一回波信号和一个第二回波信号记为目标物体的第一回波信号和第二回波信号。
在该实施例中,即使采用上述静态标定方案,也可能存在其他障碍物反射回的噪音信号,该实施例具体限定了确定一组第一回波信号和第二回波信号的方案。首先接收同一帧的第一回波信号和第二回波信号,保证了第一回波信号和第二回波信号的时间一致性,后续则筛选出针对同一目标物体的第一回波信号和第二回波信号。具体而言,对同一帧回波信号进行分析,以获得相应的探测信息,包括目标点与发射点之间的相对距离和相对角度。由于目标物体处在重叠区域内,而重叠区域位于第一毫米波雷达和第二毫米波雷达之间,且范围不至于过大,因此可以认为同一目标物体的第一回波信号和第二回波信号对应的探测信息相对于第一毫米波雷达和第二毫米波雷达的对称轴近似对称,也就是二者的相对距离差值很小,二者的相对角度由于存在方向,其值应一正一负,因此二者的相对角度之和很小,此时分别引入雷达距离分辨单元(又称为雷达距离分辨率,是当两个目标位于同一方位角但与雷达的距离不同时,二者被雷达区分出来的最小距离)和第一角度门限,可认为相对距离之差小于雷达距离分辨单元、相对角度之和小于第一角度门限的一个第一回波信号和一个第二回波信号为同一目标物体的第一回波信号和第二回波信号。此外,受到几何关系影响,理论上来说,探测信息中的相对角度与相应的雷达的安装角度之差应等于目标点和发射点之间的连线与前述的纵向之间的夹角,而重叠区域是位于第一毫米波雷达和第二毫米波雷达之间的小范围区域,所以该夹角应为一个较小的值。通过将第一回波信号对应的相对角度与第一毫米波雷达的粗估安装角度做对比,将第二回波信号对应的相对角度与第二毫米波雷达的粗估安装角度做对比,并要求对比所得的偏差小于第二角度门限,可以过滤掉重叠区域以外的障碍物反射的回波信号,实现噪音过滤。其中,粗估安装角度的误差为正负5°。
在一些实施例中,第一角度门限与第一毫米波雷达和第二毫米波雷达的安装角一致性相关;和/或第二角度门限与第一毫米波雷达和第二毫米波雷达的安装角一致性相关。
在该实施例中,具体限定了第一角度门限和/或第二角度门限与第一毫米波雷达和第二毫米波雷达的安装角一致性相关。第一毫米波雷达和第二 毫米波雷达的安装角一致性越高,第一毫米波雷达和第二毫米波雷达发射的毫米波雷达越对称,则第一回波信号和第二回波信号对应的相对角度越接近,第一毫米波雷达和第二毫米波雷达的粗估安装角度也越接近,第一角度门限和/或第二角度门限的取值越小,其具体取值可结合试验得到。
在一些实施例中,第一角度门限小于10°。
在一些实施例中,第二角度门限小于10°。
在一些实施例中,目标物体为车辆在移动过程中检测到的物体。
在该实施例中,车辆处于移动状态,目标物体是车辆在移动过程中检测到的物体,即该实施例提供了一种毫米波雷达组件的安装角度的动态标定方案。在接收到同一帧第一回波信号和第二回波信号时,由于相应的各个雷达信号到达障碍物的时间差别较小,可近似认为目标物体与车辆处于相对静止的状态,并基于此进行后续的数据处理。该方案可以在车辆完成生产并投入使用后运行,拓展了适用时机。
在一些实施例中,毫米波雷达组件安装角度的标定方法还包括:检测第一回波信号中的第一候选物体和第二回波信号中的第二候选物体;获取第一候选物体的第一探测信息,第一探测信息包括第一候选物体与第一毫米波雷达之间的相对距离和相对角度;获取第二候选物体的第二探测信息,第二探测信息包括第二候选物体与第二毫米波雷达之间的相对距离和相对角度;根据第一探测信息和第二探测信息,确定第一候选物体和第二候选物体为同一物体,且为目标物体。
在该实施例中,当采用上述动态标定方案时,车辆周围的障碍物较多,如何确定一个第一回波信号和一个第二回波信号均来自目标物体,即来自同一物体,非常重要。与静态标定时类似,需先接收同一帧的第一回波信号和第二回波信号,再分析出相应的第一探测信息和第二探测信息,则可得到各自对应的第一候选物体和第二候选物体的情况,若确定第一候选物体和第二候选物体为同一物体,则表明相应的第一回波信号和第二回波信号均来自目标物体,可执行后续标定计算,确保了标定结果的准确性。
在一些实施例中,根据第一探测信息和第二探测信息,确定第一候选物体和第二候选物体为同一物体,且为目标物体,包括:根据第一探测信 息、第二探测信息、第一毫米波雷达的粗估安装角度和第二毫米波雷达的粗估安装角度确定第一候选物体和第二候选物体的位置;确定间距小于预设间距的第一候选物体和第二候选物体为同一物体,且为目标物体。
在该实施例中,具体限定了如何确定第一候选物体和第二候选物体为同一物体。首先,利用第一探测信息和第二探测信息中的相对距离、相对角度,以及第一毫米波雷达和第二毫米波雷达的粗估安装角度,可以计算出每个第一回波信号对应的第一候选物体的位置,和每个第二回波信号对应的第二候选物体的位置,理论上来说,为同一物体的第一候选物体和第二候选物体的位置应重合,但由于计算时使用的是粗估安装角度,因此计算结果会存在误差,但差别不至于过大,此时分别计算各个第一候选物体与各个第二候选物体的间距,并将间距小于预设间距时对应的一组第一候选物体和第二候选物体确定为同一物体,即为目标物体,保证了方案的顺利运行。
可以理解的是,由于车辆移动过程中,处于第一毫米波雷达和第二毫米波雷达的重叠区域内的障碍物可能不止一个,也就对应前文中目标物体的数量为多个的情况。当然,也可能出现重叠区域内不存在障碍物的情况,此时只需继续接收下一帧的回波信号。
接下来继续结合图2中的标号介绍一个具体实施例。该毫米波雷达组件安装角度的标定方法包括:
步骤1,测量第一毫米波雷达或第二毫米波雷达距车身中轴线的距离d;
步骤2,控制第一毫米波雷达和第二毫米波雷达分别发射第一雷达信号和第二雷达信号;
步骤3,在车身中轴线附近由近及远N个位置分别放置角反射器,每个位置停留10s;
步骤4,对每个位置获取的第一回波信号和第二回波信号进行处理,分别获取探测信息(r MM)和(r SS),一个探测信息反映了一个目标点的位置;
步骤5,在每个位置获得的每帧结果里寻找同时满足如下条件的目标 点
Figure PCTCN2019093624-appb-000004
认为是第一毫米波雷达和第二毫米波雷达同时观测的相同目标,其中,r ε为雷达距离分辨单元,a 为第一毫米波雷达的粗估安装角度,a 为第二毫米波雷达的粗估安装角度,α ε和α 为不超过10°的角度门限,具体值取决于第一毫米波雷达和第二毫米波雷达的安装角的一致性差别程度。
步骤6,对满足上述条件的目标点i(i=1,2...I)分别代入
Figure PCTCN2019093624-appb-000005
步骤7,对所有I个目标处理结果取平均即可获得第一安装角度和第二安装角度
Figure PCTCN2019093624-appb-000006
由于雷达测量过程必不可少地会混入量测噪声,这里采用多个位置多帧结果求平均,以避免单次测量造成的误差偏差较大。
本申请第二方面的实施例提供了一种毫米波雷达组件安装角度的标定系统,毫米波雷达组件用于可移动平台(例如车辆),毫米波雷达组件包括第一毫米波雷达和第二毫米波雷达,第一毫米波雷达用于发射第一雷达信号及接收第一回波信号,第二毫米波雷达用于发射第二雷达信号及接收第二回波信号,第一毫米波雷达和第二毫米波雷达的探测范围存在重叠区域。
图3示出了本申请的一个实施例的毫米波雷达组件安装角度的标定系统的结构示意图。如图3所示,该毫米波雷达组件安装角度的标定系统100 包括:
存储器102,被配置为存储计算机指令;
处理器104,被配置为执行计算机指令以实现:控制第一毫米波雷达和第二毫米波雷达分别发射第一雷达信号和第二雷达信号;获取目标物体的第一回波信号和第二回波信号;根据第一回波信号和第二回波信号确定第一毫米波雷达的第一安装角度和第二毫米波雷达的第二安装角度。
本申请实施例提供的毫米波雷达组件安装角度的标定系统100,利用了毫米波雷达组件的第一毫米波雷达和第二毫米波雷达的探测范围重叠区域。获取上述重叠区域内的一个目标物体的第一回波信号和第二回波信号,则第一回波信号和第二回波信号所反映的就是同一个障碍物(即该目标物体)的位置,也就是存在相同的位置因素,可借此分析第一回波信号和第二回波信号,并得出第一毫米波雷达的第一安装角度和第二毫米波雷达的第二安装角度。本申请采用信号处理方式,避免了传统机械校准的复杂操作,从而大幅简化了安装角度标定的流程,大为降低了标定复杂程度,大大降低所需人力及时间成本。可以理解的是,本申请并不限于毫米波雷达,而适用于任何两个存在重叠区域的雷达的安装角度的标定。
在一些实施例中,第一安装角度和第二安装角度为同一方向上的安装角度。
在该实施例中,通过限定第一安装角度和第二安装角度在方向上的一致性,也就是限定了二者是第一毫米波雷达的安装面和第二毫米波雷达的安装面相对于同一个方向的偏转角度,有助于确保利用重叠区域进行安装角度标定时的标定结果的准确性。
在一些实施例中,处理器104执行计算机指令时实现的根据第一回波信号和第二回波信号确定第一毫米波雷达的第一安装角度和第二毫米波雷达的第二安装角度,包括:根据第一回波信号和第二回波信号分别获得相应的探测信息,探测信息包括目标物体与发射点之间的相对距离和相对角度;根据第一毫米波雷达和第二毫米波雷达的间距、第一回波信号对应的相对距离和相对角度、第二回波信号对应的相对距离和相对角度、第一安装角度、第二安装角度之间的几何关系,确定第一安装角度和第二安装角 度。
在该实施例中,重叠区域内的目标物体被第一毫米波雷达和第二毫米波雷达同时观测到,利用雷达测量相对距离和相对角度,结合几何关系,可以解算出两个毫米波雷达的安装角度。该实施例通过数据处理解算的方式准确获取毫米波雷达的安装角度,避免了传统机械校准的复杂操作,从而大幅简化了安装角度标定的流程,大为降低了标定复杂程度,大大降低所需人力及时间成本。
在一些实施例中,处理器104执行计算机指令时实现的根据第一毫米波雷达和第二毫米波雷达的间距、第一回波信号对应的相对距离和相对角度、第二回波信号对应的相对距离和相对角度、第一安装角度、第二安装角度之间的几何关系,确定第一安装角度和第二安装角度,包括:以第一毫米波雷达和第二毫米波雷达之间的连线方向为横向,以横向的垂直方向为纵向,利用第一回波信号对应的相对距离在横向上的分量与第二回波信号对应的相对距离在横向上的分量之和等于第一毫米波雷达和第二毫米波雷达的间距,第一回波信号对应的相对距离在纵向上的分量与第二回波信号对应的相对距离在纵向上的分量相等,确定第一安装角度和第二安装角度。
在该实施例中,具体限定了如何表达第一毫米波雷达、第二毫米波雷达和目标物体之间的几何位置关系。第一毫米波雷达、第二毫米波雷达和目标物体在同一平面内围成一个三角形,第一毫米波雷达和第二毫米波雷达的间距反映三角形的第一条边的边长,第一回波信号和第二回波信号各自对应的相对距离则分别反映三角形的第二条边和第三条边的边长。由于三角形的任意两条边在另一边上的投影长度之和等于另一边的长度,而第二条边与第一条边的夹角可以利用第一回波信号对应的相对角度和第一安装角度来表示,第三条边与第一条边的夹角可以利用第二回波信号对应的相对角度和第二安装角度来表示,因此可以通过上述几何位置关系计算出第一安装角度和第二安装角度。
在一些实施例中,处理器104执行计算机指令时实现的根据第一回波信号和第二回波信号确定第一毫米波雷达的第一安装角度和第二毫米波雷 达的第二安装角度,包括:根据不同帧的第一回波信号和第二回波信号分别确定第一安装角度和第二安装角度;计算全部第一安装角度的平均值,作为最终的第一安装角度;计算全部第二安装角度的平均值,作为最终的第二安装角度。
在该实施例中,毫米波雷达可以连续发射雷达信号,进而连续接收回波信号,利用在不同帧接收到的第一回波信号和第二回波信号,可以分别确定出多组第一安装角度和第二安装角度,再将所有计算结果的平均值作为最终的第一安装角度和第二安装角度输出,可以降低测量误差带来的安装角度偏差。
在一些实施例中,处理器104执行计算机指令时还实现:针对位于不同位置的目标物体,重复执行控制第一毫米波雷达和第二毫米波雷达分别发射第一雷达信号和第二雷达信号的步骤,并确定相应的第一安装角度和第二安装角度;计算全部第一安装角度的平均值,作为最终的第一安装角度;计算全部第二安装角度的平均值,作为最终的第二安装角度。
在该实施例中,进一步改变目标物体的位置,针对位于不同位置的目标物体,分别计算出多组第一安装角度和第二安装角度,再将所有计算结果的平均值作为最终的第一安装角度和第二安装角度输出,可以降低测量误差带来的安装角度偏差。
在一些实施例中,目标物体在重叠区域内的不同位置之间移动,以获取不同位置的目标物体的第一回波信号和第二回波信号。
在该实施例中,通过令目标物体在重叠区域内的不同位置之间移动,可以利用一个目标物体获得多组第一回波信号和第二回波信号,进而确定出多组第一安装角度和第二安装角度,降低测量误差带来的安装角度偏差。
在一些实施例中,目标物体在每个位置停留预设时长。
在该实施例中,进一步令目标物体在每个位置停留预设时长,一方面提高了移动控制的自动化,另一方面可在每个位置获得多帧结果,丰富了样本数量。
在一些实施例中,目标物体的数量为多个,处理器104执行计算机指令时实现的根据第一回波信号和第二回波信号确定第一毫米波雷达的第一 安装角度和第二毫米波雷达的第二安装角度,包括:针对每个目标物体的第一回波信号和第二回波信号,确定相应的第一安装角度和第二安装角度;计算全部第一安装角度的平均值,作为最终的第一安装角度;计算全部第二安装角度的平均值,作为最终的第二安装角度。
在该实施例中,具体限定了目标物体的数量为多个的情况,此时可同时得到多组第一回波信号和第二回波信号,相当于同时针对不同位置的目标物体执行了计算,既可提高单位时间内的采样数量,又降低了对周围环境的要求,即不必清理重叠区域,以保证只存在一个目标物体。同上,可进一步结合不同帧的回波信号,进一步增加采样数量。
在一些实施例中,目标物体为置于空旷环境中的角反射器或静态物体;车辆静置于空旷环境中。
在该实施例中,目标物体和车辆均静置于空旷环境中,即该实施例提供了一种毫米波雷达组件的安装角度的静态标定方案。此时环境中没有其他干扰障碍物,且目标物体和车辆都处于稳定的静置状态,可以提高标定结果的准确度。该方案尤其适合于车辆生产测试阶段。
在一些实施例中,处理器104执行计算机指令时实现的获取目标物体的第一回波信号和第二回波信号包括:接收同一帧的第一回波信号和第二回波信号;根据第一回波信号和第二回波信号分别获得相应的探测信息,探测信息包括目标点与发射点之间的相对距离和相对角度;将同时满足二者的相对距离之差小于雷达距离分辨单元、二者的相对角度之和小于第一角度门限、二者的相对角度与各自对应的粗估安装角度的偏差均小于第二角度门限的一个第一回波信号和一个第二回波信号记为目标物体的第一回波信号和第二回波信号。
在该实施例中,即使采用上述静态标定方案,也可能存在其他障碍物反射回的噪音信号,该实施例具体限定了确定一组第一回波信号和第二回波信号的方案。首先接收同一帧的第一回波信号和第二回波信号,保证了第一回波信号和第二回波信号的时间一致性,后续则筛选出针对同一目标物体的第一回波信号和第二回波信号。具体而言,对同一帧回波信号进行分析,以获得相应的探测信息,包括目标点与发射点之间的相对距离和相 对角度。由于目标物体处在重叠区域内,而重叠区域位于第一毫米波雷达和第二毫米波雷达之间,且范围不至于过大,因此可以认为同一目标物体的第一回波信号和第二回波信号对应的探测信息相对于第一毫米波雷达和第二毫米波雷达的对称轴近似对称,也就是二者的相对距离差值很小,二者的相对角度由于存在方向,其值应一正一负,因此二者的相对角度之和很小,此时分别引入雷达距离分辨单元和第一角度门限,可认为相对距离之差小于雷达距离分辨单元、相对角度之和小于第一角度门限的一个第一回波信号和一个第二回波信号为同一目标物体的第一回波信号和第二回波信号。此外,受到几何关系影响,理论上来说,探测信息中的相对角度与相应的雷达的安装角度之差应等于目标点和发射点之间的连线与前述的纵向之间的夹角,而重叠区域是位于第一毫米波雷达和第二毫米波雷达之间的小范围区域,所以该夹角应为一个较小的值。通过将第一回波信号对应的相对角度与第一毫米波雷达的粗估安装角度做对比,将第二回波信号对应的相对角度与第二毫米波雷达的粗估安装角度做对比,并要求对比所得的偏差小于第二角度门限,可以过滤掉重叠区域以外的障碍物反射的回波信号,实现噪音过滤。
在一些实施例中,第一角度门限与第一毫米波雷达和第二毫米波雷达的安装角一致性相关;和/或第二角度门限与第一毫米波雷达和第二毫米波雷达的安装角一致性相关。
在该实施例中,具体限定了第一角度门限和/或第二角度门限与第一毫米波雷达和第二毫米波雷达的安装角一致性相关。第一毫米波雷达和第二毫米波雷达的安装角一致性越高,第一毫米波雷达和第二毫米波雷达发射的毫米波雷达越对称,则第一回波信号和第二回波信号对应的相对角度越接近,第一毫米波雷达和第二毫米波雷达的粗估安装角度也越接近,第一角度门限和/或第二角度门限的取值越小,其具体取值可结合试验得到。可选地,第一角度门限小于10°,第二角度门限小于10°。
在一些实施例中,目标物体为车辆在移动过程中检测到的物体。
在该实施例中,车辆处于移动状态,目标物体是车辆在移动过程中检测到的物体,即该实施例提供了一种毫米波雷达组件的安装角度的动态标 定方案。在接收到同一帧第一回波信号和第二回波信号时,由于相应的各个雷达信号到达障碍物的时间差别较小,可近似认为目标物体与车辆处于相对静止的状态,并基于此进行后续的数据处理。该方案可以在车辆完成生产并投入使用后运行,拓展了适用时机。
在一些实施例中,处理器104执行计算机指令时还实现:检测第一回波信号中的第一候选物体和第二回波信号中的第二候选物体;获取第一候选物体的第一探测信息,第一探测信息包括第一候选物体与第一毫米波雷达之间的相对距离和相对角度;获取第二候选物体的第二探测信息,第二探测信息包括第二候选物体与第二毫米波雷达之间的相对距离和相对角度;根据第一探测信息和第二探测信息,确定第一候选物体和第二候选物体为同一物体,且为目标物体。
在该实施例中,当采用上述动态标定方案时,车辆周围的障碍物较多,如何确定一个第一回波信号和一个第二回波信号均来自目标物体,即来自同一物体,非常重要。与静态标定时类似,需先接收同一帧的第一回波信号和第二回波信号,再分析出相应的第一探测信息和第二探测信息,则可得到各自对应的第一候选物体和第二候选物体的情况,若确定第一候选物体和第二候选物体为同一物体,则表明相应的第一回波信号和第二回波信号均来自目标物体,可执行后续标定计算,确保了标定结果的准确性。
在一些实施例中,处理器104执行计算机指令时实现的根据第一探测信息和第二探测信息,确定第一候选物体和第二候选物体为同一物体,且为目标物体,包括:根据第一探测信息、第二探测信息、第一毫米波雷达的粗估安装角度和第二毫米波雷达的粗估安装角度确定第一候选物体和第二候选物体的位置;确定间距小于预设间距的第一候选物体和第二候选物体为同一物体,且为目标物体。
在该实施例中,具体限定了如何确定第一候选物体和第二候选物体为同一物体。首先,利用第一探测信息和第二探测信息中的相对距离、相对角度,以及第一毫米波雷达和第二毫米波雷达的粗估安装角度,可以计算出每个第一回波信号对应的第一候选物体的位置,和每个第二回波信号对应的第二候选物体的位置,理论上来说,为同一物体的第一候选物体和第 二候选物体的位置应重合,但由于计算时使用的是粗估安装角度,因此计算结果会存在误差,但差别不至于过大,此时分别计算各个第一候选物体与各个第二候选物体的间距,并将间距小于预设间距时对应的一组第一候选物体和第二候选物体确定为同一物体,即为目标物体,保证了方案的顺利运行。
本申请第三方面的实施例提供了一种可移动平台(例如车辆)。
图4示出了本申请的一个实施例的可移动平台的结构示意图。如图4所示,该可移动平台200包括:
毫米波雷达组件202,其包括第一毫米波雷达和第二毫米波雷达,第一毫米波雷达用于发射第一雷达信号及接收第一回波信号,第二毫米波雷达用于发射第二雷达信号及接收第二回波信号,第一毫米波雷达和第二毫米波雷达的探测范围存在重叠区域;
存储器204,被配置为存储计算机指令;
处理器206,被配置为执行计算机指令以实现:控制第一毫米波雷达和第二毫米波雷达分别发射第一雷达信号和第二雷达信号;获取目标物体的第一回波信号和第二回波信号;根据第一回波信号和第二回波信号确定第一毫米波雷达的第一安装角度和第二毫米波雷达的第二安装角度。
本申请实施例提供的可移动平台200,利用了毫米波雷达组件202的第一毫米波雷达和第二毫米波雷达的探测范围重叠区域。获取上述重叠区域内的一个目标物体的第一回波信号和第二回波信号,则第一回波信号和第二回波信号所反映的就是同一个障碍物(即该目标物体)的位置,也就是存在相同的位置因素,可借此分析第一回波信号和第二回波信号,并得出第一毫米波雷达的第一安装角度和第二毫米波雷达的第二安装角度。本申请采用信号处理方式,避免了传统机械校准的复杂操作,从而大幅简化了安装角度标定的流程,大为降低了标定复杂程度,大大降低所需人力及时间成本。可以理解的是,本申请并不限于毫米波雷达,而适用于任何两个存在重叠区域的雷达的安装角度的标定。
在一些实施例中,第一安装角度和第二安装角度为同一方向上的安装角度。
在该实施例中,通过限定第一安装角度和第二安装角度在方向上的一致性,也就是限定了二者是第一毫米波雷达的安装面和第二毫米波雷达的安装面相对于同一个方向的偏转角度,有助于确保利用重叠区域进行安装角度标定时的标定结果的准确性。
在一些实施例中,处理器206执行计算机指令时实现的根据第一回波信号和第二回波信号确定第一毫米波雷达的第一安装角度和第二毫米波雷达的第二安装角度,包括:根据第一回波信号和第二回波信号分别获得相应的探测信息,探测信息包括目标物体与发射点之间的相对距离和相对角度;根据第一毫米波雷达和第二毫米波雷达的间距、第一回波信号对应的相对距离和相对角度、第二回波信号对应的相对距离和相对角度、第一安装角度、第二安装角度之间的几何关系,确定第一安装角度和第二安装角度。
在该实施例中,重叠区域内的目标物体被第一毫米波雷达和第二毫米波雷达同时观测到,利用雷达测量相对距离和相对角度,结合几何关系,可以解算出两个毫米波雷达的安装角度。该实施例通过数据处理解算的方式准确获取毫米波雷达的安装角度,避免了传统机械校准的复杂操作,从而大幅简化了安装角度标定的流程,大为降低了标定复杂程度,大大降低所需人力及时间成本。
在一些实施例中,处理器206执行计算机指令时实现的根据第一毫米波雷达和第二毫米波雷达的间距、第一回波信号对应的相对距离和相对角度、第二回波信号对应的相对距离和相对角度、第一安装角度、第二安装角度之间的几何关系,确定第一安装角度和第二安装角度,包括:以第一毫米波雷达和第二毫米波雷达之间的连线方向为横向,以横向的垂直方向为纵向,利用第一回波信号对应的相对距离在横向上的分量与第二回波信号对应的相对距离在横向上的分量之和等于第一毫米波雷达和第二毫米波雷达的间距,第一回波信号对应的相对距离在纵向上的分量与第二回波信号对应的相对距离在纵向上的分量相等,确定第一安装角度和第二安装角度。
在该实施例中,具体限定了如何表达第一毫米波雷达、第二毫米波雷 达和目标物体之间的几何位置关系。第一毫米波雷达、第二毫米波雷达和目标物体在同一平面内围成一个三角形,第一毫米波雷达和第二毫米波雷达的间距反映三角形的第一条边的边长,第一回波信号和第二回波信号各自对应的相对距离则分别反映三角形的第二条边和第三条边的边长。由于三角形的任意两条边在另一边上的投影长度之和等于另一边的长度,而第二条边与第一条边的夹角可以利用第一回波信号对应的相对角度和第一安装角度来表示,第三条边与第一条边的夹角可以利用第二回波信号对应的相对角度和第二安装角度来表示,因此可以通过上述几何位置关系计算出第一安装角度和第二安装角度。
在一些实施例中,处理器206执行计算机指令时实现的根据第一回波信号和第二回波信号确定第一毫米波雷达的第一安装角度和第二毫米波雷达的第二安装角度,包括:根据不同帧的第一回波信号和第二回波信号分别确定第一安装角度和第二安装角度;计算全部第一安装角度的平均值,作为最终的第一安装角度;计算全部第二安装角度的平均值,作为最终的第二安装角度。
在该实施例中,毫米波雷达可以连续发射雷达信号,进而连续接收回波信号,利用在不同帧接收到的第一回波信号和第二回波信号,可以分别确定出多组第一安装角度和第二安装角度,再将所有计算结果的平均值作为最终的第一安装角度和第二安装角度输出,可以降低测量误差带来的安装角度偏差。
在一些实施例中,处理器206执行计算机指令时还实现:针对位于不同位置的目标物体,重复执行控制第一毫米波雷达和第二毫米波雷达分别发射第一雷达信号和第二雷达信号的步骤,并确定相应的第一安装角度和第二安装角度;计算全部第一安装角度的平均值,作为最终的第一安装角度;计算全部第二安装角度的平均值,作为最终的第二安装角度。
在该实施例中,进一步改变目标物体的位置,针对位于不同位置的目标物体,分别计算出多组第一安装角度和第二安装角度,再将所有计算结果的平均值作为最终的第一安装角度和第二安装角度输出,可以降低测量误差带来的安装角度偏差。
在一些实施例中,目标物体在重叠区域内的不同位置之间移动,以获取不同位置的目标物体的第一回波信号和第二回波信号。
在该实施例中,通过令目标物体在重叠区域内的不同位置之间移动,可以利用一个目标物体获得多组第一回波信号和第二回波信号,进而确定出多组第一安装角度和第二安装角度,降低测量误差带来的安装角度偏差。
在一些实施例中,目标物体在每个位置停留预设时长。
在该实施例中,进一步令目标物体在每个位置停留预设时长,一方面提高了移动控制的自动化,另一方面可在每个位置获得多帧结果,丰富了样本数量。
在一些实施例中,目标物体的数量为多个,处理器206执行计算机指令时实现的根据第一回波信号和第二回波信号确定第一毫米波雷达的第一安装角度和第二毫米波雷达的第二安装角度,包括:针对每个目标物体的第一回波信号和第二回波信号,确定相应的第一安装角度和第二安装角度;计算全部第一安装角度的平均值,作为最终的第一安装角度;计算全部第二安装角度的平均值,作为最终的第二安装角度。
在该实施例中,具体限定了目标物体的数量为多个的情况,此时可同时得到多组第一回波信号和第二回波信号,相当于同时针对不同位置的目标物体执行了计算,既可提高单位时间内的采样数量,又降低了对周围环境的要求,即不必清理重叠区域,以保证只存在一个目标物体。同上,可进一步结合不同帧的回波信号,进一步增加采样数量。
在一些实施例中,目标物体为置于空旷环境中的角反射器或静态物体;可移动平台200静置于空旷环境中。
在该实施例中,目标物体和可移动平台200均静置于空旷环境中,即该实施例提供了一种毫米波雷达组件202的安装角度的静态标定方案。此时环境中没有其他干扰障碍物,且目标物体和可移动平台200都处于稳定的静置状态,可以提高标定结果的准确度。该方案尤其适合于可移动平台200生产测试阶段。
在一些实施例中,处理器206执行计算机指令时实现的获取目标物体的第一回波信号和第二回波信号包括:接收同一帧的第一回波信号和第二 回波信号;根据第一回波信号和第二回波信号分别获得相应的探测信息,探测信息包括目标点与发射点之间的相对距离和相对角度;将同时满足二者的相对距离之差小于雷达距离分辨单元、二者的相对角度之和小于第一角度门限、二者的相对角度与各自对应的粗估安装角度的偏差均小于第二角度门限的一个第一回波信号和一个第二回波信号记为目标物体的第一回波信号和第二回波信号。
在该实施例中,即使采用上述静态标定方案,也可能存在其他障碍物反射回的噪音信号,该实施例具体限定了确定一组第一回波信号和第二回波信号的方案。首先接收同一帧的第一回波信号和第二回波信号,保证了第一回波信号和第二回波信号的时间一致性,后续则筛选出针对同一目标物体的第一回波信号和第二回波信号。具体而言,对同一帧回波信号进行分析,以获得相应的探测信息,包括目标点与发射点之间的相对距离和相对角度。由于目标物体处在重叠区域内,而重叠区域位于第一毫米波雷达和第二毫米波雷达之间,且范围不至于过大,因此可以认为同一目标物体的第一回波信号和第二回波信号对应的探测信息相对于第一毫米波雷达和第二毫米波雷达的对称轴近似对称,也就是二者的相对距离差值很小,二者的相对角度由于存在方向,其值应一正一负,因此二者的相对角度之和很小,此时分别引入雷达距离分辨单元和第一角度门限,可认为相对距离之差小于雷达距离分辨单元、相对角度之和小于第一角度门限的一个第一回波信号和一个第二回波信号为同一目标物体的第一回波信号和第二回波信号。此外,受到几何关系影响,理论上来说,探测信息中的相对角度与相应的雷达的安装角度之差应等于目标点和发射点之间的连线与前述的纵向之间的夹角,而重叠区域是位于第一毫米波雷达和第二毫米波雷达之间的小范围区域,所以该夹角应为一个较小的值。通过将第一回波信号对应的相对角度与第一毫米波雷达的粗估安装角度做对比,将第二回波信号对应的相对角度与第二毫米波雷达的粗估安装角度做对比,并要求对比所得的偏差小于第二角度门限,可以过滤掉重叠区域以外的障碍物反射的回波信号,实现噪音过滤。
在一些实施例中,第一角度门限与第一毫米波雷达和第二毫米波雷达 的安装角一致性相关;和/或第二角度门限与第一毫米波雷达和第二毫米波雷达的安装角一致性相关。
在该实施例中,具体限定了第一角度门限和/或第二角度门限与第一毫米波雷达和第二毫米波雷达的安装角一致性相关。第一毫米波雷达和第二毫米波雷达的安装角一致性越高,第一毫米波雷达和第二毫米波雷达发射的毫米波雷达越对称,则第一回波信号和第二回波信号对应的相对角度越接近,第一毫米波雷达和第二毫米波雷达的粗估安装角度也越接近,第一角度门限和/或第二角度门限的取值越小,其具体取值可结合试验得到。可选地,第一角度门限小于10°,第二角度门限小于10°。
在一些实施例中,目标物体为可移动平台200在移动过程中检测到的物体。
在该实施例中,可移动平台200处于移动状态,目标物体是可移动平台200在移动过程中检测到的物体,即该实施例提供了一种毫米波雷达组件202的安装角度的动态标定方案。在接收到同一帧第一回波信号和第二回波信号时,由于相应的各个雷达信号到达障碍物的时间差别较小,可近似认为目标物体与可移动平台200处于相对静止的状态,并基于此进行后续的数据处理。该方案可以在可移动平台200完成生产并投入使用后运行,拓展了适用时机。
在一些实施例中,处理器206执行计算机指令时还实现:检测第一回波信号中的第一候选物体和第二回波信号中的第二候选物体;获取第一候选物体的第一探测信息,第一探测信息包括第一候选物体与第一毫米波雷达之间的相对距离和相对角度;获取第二候选物体的第二探测信息,第二探测信息包括第二候选物体与第二毫米波雷达之间的相对距离和相对角度;根据第一探测信息和第二探测信息,确定第一候选物体和第二候选物体为同一物体,且为目标物体。
在该实施例中,当采用上述动态标定方案时,可移动平台200周围的障碍物较多,如何确定一个第一回波信号和一个第二回波信号均来自目标物体,即来自同一物体,非常重要。与静态标定时类似,需先接收同一帧的第一回波信号和第二回波信号,再分析出相应的第一探测信息和第二探 测信息,则可得到各自对应的第一候选物体和第二候选物体的情况,若确定第一候选物体和第二候选物体为同一物体,则表明相应的第一回波信号和第二回波信号均来自目标物体,可执行后续标定计算,确保了标定结果的准确性。
在一些实施例中,处理器206执行计算机指令时实现的根据第一探测信息和第二探测信息,确定第一候选物体和第二候选物体为同一物体,且为目标物体,包括:根据第一探测信息、第二探测信息、第一毫米波雷达的粗估安装角度和第二毫米波雷达的粗估安装角度确定第一候选物体和第二候选物体的位置;确定间距小于预设间距的第一候选物体和第二候选物体为同一物体,且为目标物体。
在该实施例中,具体限定了如何确定第一候选物体和第二候选物体为同一物体。首先,利用第一探测信息和第二探测信息中的相对距离、相对角度,以及第一毫米波雷达和第二毫米波雷达的粗估安装角度,可以计算出每个第一回波信号对应的第一候选物体的位置,和每个第二回波信号对应的第二候选物体的位置,理论上来说,为同一物体的第一候选物体和第二候选物体的位置应重合,但由于计算时使用的是粗估安装角度,因此计算结果会存在误差,但差别不至于过大,此时分别计算各个第一候选物体与各个第二候选物体的间距,并将间距小于预设间距时对应的一组第一候选物体和第二候选物体确定为同一物体,即为目标物体,保证了方案的顺利运行。
具体地,第二方面和第三方面涉及的存储器可以包括用于数据或指令的大容量存储器。举例来说而非限制,存储器可包括硬盘驱动器(Hard Disk Drive,HDD)、软盘驱动器、闪存、光盘、磁光盘、磁带或通用串行总线(Universal Serial Bus,USB)驱动器或者两个或更多个以上这些的组合。在合适的情况下,存储器可包括可移除或不可移除(或固定)的介质。在合适的情况下,存储器可在综合网关容灾设备的内部或外部。在特定实施例中,存储器是非易失性固态存储器。在特定实施例中,存储器包括只读存储器(ROM)。在合适的情况下,该ROM可以是掩模编程的ROM、可编程ROM(PROM)、可擦除PROM(EPROM)、电可擦除PROM(EEPROM)、 电可改写ROM(EAROM)或闪存或者两个或更多个以上这些的组合。
第二方面和第三方面涉及的处理器可以包括中央处理器(CPU),或者特定集成电路(Application Specific Integrated Circuit,ASIC),或者可以被配置成实施本申请实施例的一个或多个集成电路。
本申请第四方面的实施例提供了一种计算机可读存储介质,其上存储有计算机程序,计算机程序被处理器执行时实现如所述任一实施例所述的毫米波雷达组件安装角度的标定方法的步骤,因而具备该毫米波雷达组件安装角度的标定方法的有益效果,在此不再赘述。
具体地,计算机可读存储介质可以包括能够存储或传输信息的任何介质。计算机可读存储介质的例子包括电子电路、半导体存储器设备、ROM、闪存、可擦除ROM(EROM)、软盘、CD-ROM、光盘、硬盘、光纤介质、射频(RF)链路,等等。代码段可以经由诸如因特网、内联网等的计算机网络被下载。
在本申请中,术语“多个”则指两个或两个以上,除非另有明确的限定。术语“安装”、“相连”、“连接”、“固定”等术语均应做广义理解,例如,“连接”可以是固定连接,也可以是可拆卸连接,或一体地连接;“相连”可以是直接相连,也可以通过中间媒介间接相连。对于本领域的普通技术人员而言,可以根据具体情况理解上述术语在本申请中的具体含义。
在本说明书的描述中,术语“一个实施例”、“一些实施例”、“具体实施例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或特点包含于本申请的至少一个实施例或示例中。在本说明书中,对上述术语的示意性表述不一定指的是相同的实施例或实例。而且,描述的具体特征、结构、材料或特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
以上所述仅为本申请的优选实施例而已,并不用于限制本申请,对于本领域的技术人员来说,本申请可以有各种更改和变化。凡在本申请的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本申请的保护范围之内。

Claims (43)

  1. 一种毫米波雷达组件安装角度的标定方法,其中,所述毫米波雷达组件用于可移动平台,所述毫米波雷达组件包括第一毫米波雷达和第二毫米波雷达,所述第一毫米波雷达用于发射第一雷达信号及接收第一回波信号,所述第二毫米波雷达用于发射第二雷达信号及接收第二回波信号,所述第一毫米波雷达和所述第二毫米波雷达的探测范围存在重叠区域,所述毫米波雷达组件安装角度的标定方法包括:
    控制所述第一毫米波雷达和所述第二毫米波雷达分别发射所述第一雷达信号和所述第二雷达信号;
    获取目标物体的所述第一回波信号和所述第二回波信号;
    根据所述第一回波信号和所述第二回波信号确定所述第一毫米波雷达的第一安装角度和所述第二毫米波雷达的第二安装角度。
  2. 根据权利要求1所述的毫米波雷达组件安装角度的标定方法,其中,所述第一安装角度和所述第二安装角度为同一方向上的安装角度。
  3. 根据权利要求1所述的毫米波雷达组件安装角度的标定方法,其中,所述根据所述第一回波信号和所述第二回波信号确定所述第一毫米波雷达的第一安装角度和所述第二毫米波雷达的第二安装角度,包括:
    根据所述第一回波信号和所述第二回波信号分别获得相应的探测信息,所述探测信息包括所述目标物体与发射点之间的相对距离和相对角度;
    根据所述第一毫米波雷达和所述第二毫米波雷达的间距、所述第一回波信号对应的相对距离和相对角度、所述第二回波信号对应的相对距离和相对角度、所述第一安装角度、所述第二安装角度之间的几何关系,确定所述第一安装角度和所述第二安装角度。
  4. 根据权利要求3所述的毫米波雷达组件安装角度的标定方法,其中,所述根据所述第一毫米波雷达和所述第二毫米波雷达的间距、所述第一回波信号对应的相对距离和相对角度、所述第二回波信号对应的相对距离和相对角度、所述第一安装角度、所述第二安装角度之间的几何关系,确定所述第一安装角度和所述第二安装角度,包括:
    以所述第一毫米波雷达和所述第二毫米波雷达之间的连线方向为横向,以横向的垂直方向为纵向,利用所述第一回波信号对应的相对距离在横向上的分量与所述第二回波信号对应的相对距离在横向上的分量之和等于所述第一毫米波雷达和所述第二毫米波雷达的间距,所述第一回波信号对应的相对距离在纵向上的分量与所述第二回波信号对应的相对距离在纵向上的分量相等,确定所述第一安装角度和所述第二安装角度。
  5. 根据权利要求1至4中任一项所述的毫米波雷达组件安装角度的标定方法,其中,所述毫米波雷达组件安装角度的标定方法还包括:
    根据不同帧的所述第一回波信号和所述第二回波信号分别确定所述第一安装角度和所述第二安装角度,和/或针对位于不同位置的目标物体,重复执行所述控制所述第一毫米波雷达和所述第二毫米波雷达分别发射所述第一雷达信号和所述第二雷达信号的步骤,并确定相应的所述第一安装角度和所述第二安装角度;
    计算全部所述第一安装角度的平均值,作为最终的所述第一安装角度;
    计算全部所述第二安装角度的平均值,作为最终的所述第二安装角度。
  6. 根据权利要求1至4中任一项所述的毫米波雷达组件安装角度的标定方法,其中,
    所述目标物体在所述重叠区域内的不同位置之间移动,以获取不同位置的所述目标物体的所述第一回波信号和所述第二回波信号。
  7. 根据权利要求1至4中任一项所述的毫米波雷达组件安装角度的标定方法,其中,所述目标物体的数量为多个,所述根据所述第一回波信号和所述第二回波信号确定所述第一毫米波雷达的第一安装角度和所述第二毫米波雷达的第二安装角度,包括:
    针对每个所述目标物体的所述第一回波信号和所述第二回波信号,确定相应的所述第一安装角度和所述第二安装角度;
    计算全部所述第一安装角度的平均值,作为最终的所述第一安装角度;
    计算全部所述第二安装角度的平均值,作为最终的所述第二安装角度。
  8. 根据权利要求1至4中任一项所述的毫米波雷达组件安装角度的标定方法,其中,
    所述目标物体为置于空旷环境中的角反射器或静态物体;
    所述可移动平台静置于所述空旷环境中。
  9. 根据权利要求8所述的毫米波雷达组件安装角度的标定方法,其中,所述获取目标物体的所述第一回波信号和所述第二回波信号包括:
    接收同一帧的所述第一回波信号和所述第二回波信号;
    根据所述第一回波信号和所述第二回波信号分别获得相应的探测信息,所述探测信息包括目标点与发射点之间的相对距离和相对角度;
    将同时满足二者的相对距离之差小于雷达距离分辨单元、二者的相对角度之和小于第一角度门限、二者的相对角度与各自对应的粗估安装角度的偏差均小于第二角度门限的一个所述第一回波信号和一个所述第二回波信号记为所述目标物体的所述第一回波信号和所述第二回波信号。
  10. 根据权利要求9所述的毫米波雷达组件安装角度的标定方法,其中,
    所述第一角度门限与所述第一毫米波雷达和所述第二毫米波雷达的安装角一致性相关;和/或
    所述第二角度门限与所述第一毫米波雷达和所述第二毫米波雷达的安装角一致性相关。
  11. 根据权利要求9所述的毫米波雷达组件安装角度的标定方法,其中,
    所述第一角度门限小于10°;和/或
    所述第二角度门限小于10°。
  12. 根据权利要求1至4中任一项所述的毫米波雷达组件安装角度的标定方法,其中,
    所述目标物体为可移动平台在移动过程中检测到的物体。
  13. 根据权利要求12所述的毫米波雷达组件安装角度的标定方法,其中,所述毫米波雷达组件安装角度的标定方法还包括:
    检测所述第一回波信号中的第一候选物体和所述第二回波信号中的第二候选物体;
    获取所述第一候选物体的第一探测信息,所述第一探测信息包括所述 第一候选物体与所述第一毫米波雷达之间的相对距离和相对角度;
    获取所述第二候选物体的第二探测信息,所述第二探测信息包括所述第二候选物体与所述第二毫米波雷达之间的相对距离和相对角度;
    根据所述第一探测信息和所述第二探测信息,确定所述第一候选物体和所述第二候选物体为同一物体,且为所述目标物体。
  14. 根据权利要求13所述的毫米波雷达组件安装角度的标定方法,其中,所述根据所述第一探测信息和所述第二探测信息,确定所述第一候选物体和所述第二候选物体为同一物体,且为所述目标物体,包括:
    根据所述第一探测信息、所述第二探测信息、所述第一毫米波雷达的粗估安装角度和所述第二毫米波雷达的粗估安装角度确定所述第一候选物体和所述第二候选物体的位置;
    确定间距小于预设间距的所述第一候选物体和所述第二候选物体为同一物体,且为所述目标物体。
  15. 一种毫米波雷达组件安装角度的标定系统,其中,所述毫米波雷达组件用于可移动平台,所述毫米波雷达组件包括第一毫米波雷达和第二毫米波雷达,所述第一毫米波雷达用于发射第一雷达信号及接收第一回波信号,所述第二毫米波雷达用于发射第二雷达信号及接收第二回波信号,所述第一毫米波雷达和所述第二毫米波雷达的探测范围存在重叠区域,所述毫米波雷达组件的标定系统包括:
    存储器,被配置为存储计算机指令;及
    处理器,被配置为执行所述计算机指令以实现:
    控制所述第一毫米波雷达和所述第二毫米波雷达分别发射所述第一雷达信号和所述第二雷达信号;
    获取目标物体的所述第一回波信号和所述第二回波信号;
    根据所述第一回波信号和所述第二回波信号确定所述第一毫米波雷达的第一安装角度和所述第二毫米波雷达的第二安装角度。
  16. 根据权利要求15所述的毫米波雷达组件安装角度的标定系统,其中,所述第一安装角度和所述第二安装角度为同一方向上的安装角度。
  17. 根据权利要求15所述的毫米波雷达组件安装角度的标定系统,其 中,所述处理器执行所述计算机指令时实现的所述根据所述第一回波信号和所述第二回波信号确定所述第一毫米波雷达的第一安装角度和所述第二毫米波雷达的第二安装角度,包括:
    根据所述第一回波信号和所述第二回波信号分别获得相应的探测信息,所述探测信息包括所述目标物体与发射点之间的相对距离和相对角度;
    根据所述第一毫米波雷达和所述第二毫米波雷达的间距、所述第一回波信号对应的相对距离和相对角度、所述第二回波信号对应的相对距离和相对角度、所述第一安装角度、所述第二安装角度之间的几何关系,确定所述第一安装角度和所述第二安装角度。
  18. 根据权利要求17所述的毫米波雷达组件安装角度的标定系统,其中,所述处理器执行所述计算机指令时实现的所述根据所述第一毫米波雷达和所述第二毫米波雷达的间距、所述第一回波信号对应的相对距离和相对角度、所述第二回波信号对应的相对距离和相对角度、所述第一安装角度、所述第二安装角度之间的几何关系,确定所述第一安装角度和所述第二安装角度,包括:
    以所述第一毫米波雷达和所述第二毫米波雷达之间的连线方向为横向,以横向的垂直方向为纵向,利用所述第一回波信号对应的相对距离在横向上的分量与所述第二回波信号对应的相对距离在横向上的分量之和等于所述第一毫米波雷达和所述第二毫米波雷达的间距,所述第一回波信号对应的相对距离在纵向上的分量与所述第二回波信号对应的相对距离在纵向上的分量相等,确定所述第一安装角度和所述第二安装角度。
  19. 根据权利要求15至18中任一项所述的毫米波雷达组件安装角度的标定系统,其中,所述处理器执行所述计算机指令时还实现:
    根据不同帧的所述第一回波信号和所述第二回波信号分别确定所述第一安装角度和所述第二安装角度,和/或针对位于不同位置的目标物体,重复执行所述控制所述第一毫米波雷达和所述第二毫米波雷达分别发射所述第一雷达信号和所述第二雷达信号的步骤,并确定相应的所述第一安装角度和所述第二安装角度;
    计算全部所述第一安装角度的平均值,作为最终的所述第一安装角度;
    计算全部所述第二安装角度的平均值,作为最终的所述第二安装角度。
  20. 根据权利要求15至18中任一项所述的毫米波雷达组件安装角度的标定系统,其中,
    所述目标物体在所述重叠区域内的不同位置之间移动,以获取不同位置的所述目标物体的所述第一回波信号和所述第二回波信号。
  21. 根据权利要求15至18中任一项所述的毫米波雷达组件安装角度的标定系统,其中,所述目标物体的数量为多个,所述处理器执行所述计算机指令时实现的所述根据所述第一回波信号和所述第二回波信号确定所述第一毫米波雷达的第一安装角度和所述第二毫米波雷达的第二安装角度,包括:
    针对每个所述目标物体的所述第一回波信号和所述第二回波信号,确定相应的所述第一安装角度和所述第二安装角度;
    计算全部所述第一安装角度的平均值,作为最终的所述第一安装角度;
    计算全部所述第二安装角度的平均值,作为最终的所述第二安装角度。
  22. 根据权利要求15至18中任一项所述的毫米波雷达组件安装角度的标定系统,其中,
    所述目标物体为置于空旷环境中的角反射器或静态物体;
    所述可移动平台静置于所述空旷环境中。
  23. 根据权利要求22所述的毫米波雷达组件安装角度的标定系统,其中,所述处理器执行所述计算机指令时实现的所述获取目标物体的所述第一回波信号和所述第二回波信号包括:
    接收同一帧的所述第一回波信号和所述第二回波信号;
    根据所述第一回波信号和所述第二回波信号分别获得相应的探测信息,所述探测信息包括目标点与发射点之间的相对距离和相对角度;
    将同时满足二者的相对距离之差小于雷达距离分辨单元、二者的相对角度之和小于第一角度门限、二者的相对角度与各自对应的粗估安装角度的偏差均小于第二角度门限的一个所述第一回波信号和一个所述第二回波信号记为所述目标物体的所述第一回波信号和所述第二回波信号。
  24. 根据权利要求23所述的毫米波雷达组件安装角度的标定系统,其 中,
    所述第一角度门限与所述第一毫米波雷达和所述第二毫米波雷达的安装角一致性相关;和/或
    所述第二角度门限与所述第一毫米波雷达和所述第二毫米波雷达的安装角一致性相关。
  25. 根据权利要求23所述的毫米波雷达组件安装角度的标定系统,其中,
    所述第一角度门限小于10°;和/或
    所述第二角度门限小于10°。
  26. 根据权利要求15至18中任一项所述的毫米波雷达组件安装角度的标定系统,其中,
    所述目标物体为可移动平台在移动过程中检测到的物体。
  27. 根据权利要求26所述的毫米波雷达组件安装角度的标定系统,其中,所述处理器执行所述计算机指令时还实现:
    检测所述第一回波信号中的第一候选物体和所述第二回波信号中的第二候选物体;
    获取所述第一候选物体的第一探测信息,所述第一探测信息包括所述第一候选物体与所述第一毫米波雷达之间的相对距离和相对角度;
    获取所述第二候选物体的第二探测信息,所述第二探测信息包括所述第二候选物体与所述第二毫米波雷达之间的相对距离和相对角度;
    根据所述第一探测信息和所述第二探测信息,确定所述第一候选物体和所述第二候选物体为同一物体,且为所述目标物体。
  28. 根据权利要求27所述的毫米波雷达组件安装角度的标定系统,其中,所述处理器执行所述计算机指令时实现的所述根据所述第一探测信息和所述第二探测信息,确定所述第一候选物体和所述第二候选物体为同一物体,且为所述目标物体,包括:
    根据所述第一探测信息、所述第二探测信息、所述第一毫米波雷达的粗估安装角度和所述第二毫米波雷达的粗估安装角度确定所述第一候选物体和所述第二候选物体的位置;
    确定间距小于预设间距的所述第一候选物体和所述第二候选物体为同一物体,且为所述目标物体。
  29. 一种可移动平台,其中,所述可移动平台包括:
    毫米波雷达组件,所述毫米波雷达组件包括第一毫米波雷达和第二毫米波雷达,所述第一毫米波雷达用于发射第一雷达信号及接收第一回波信号,所述第二毫米波雷达用于发射第二雷达信号及接收第二回波信号,所述第一毫米波雷达和所述第二毫米波雷达的探测范围存在重叠区域;
    存储器,被配置为存储计算机指令;及
    处理器,被配置为执行所述计算机指令以实现:
    控制所述第一毫米波雷达和所述第二毫米波雷达分别发射所述第一雷达信号和所述第二雷达信号;
    获取目标物体的所述第一回波信号和所述第二回波信号;
    根据所述第一回波信号和所述第二回波信号确定所述第一毫米波雷达的第一安装角度和所述第二毫米波雷达的第二安装角度。
  30. 根据权利要求29所述的可移动平台,其中,所述第一安装角度和所述第二安装角度为同一方向上的安装角度。
  31. 根据权利要求30所述的可移动平台,其中,所述处理器执行所述计算机指令时实现的所述根据所述第一回波信号和所述第二回波信号确定所述第一毫米波雷达的第一安装角度和所述第二毫米波雷达的第二安装角度,包括:
    根据所述第一回波信号和所述第二回波信号分别获得相应的探测信息,所述探测信息包括所述目标物体与发射点之间的相对距离和相对角度;
    根据所述第一毫米波雷达和所述第二毫米波雷达的间距、所述第一回波信号对应的相对距离和相对角度、所述第二回波信号对应的相对距离和相对角度、所述第一安装角度、所述第二安装角度之间的几何关系,确定所述第一安装角度和所述第二安装角度。
  32. 根据权利要求31所述的可移动平台,其中,所述处理器执行所述计算机指令时实现的所述根据所述第一毫米波雷达和所述第二毫米波雷达的间距、所述第一回波信号对应的相对距离和相对角度、所述第二回波信 号对应的相对距离和相对角度、所述第一安装角度、所述第二安装角度之间的几何关系,确定所述第一安装角度和所述第二安装角度,包括:
    以所述第一毫米波雷达和所述第二毫米波雷达之间的连线方向为横向,以横向的垂直方向为纵向,利用所述第一回波信号对应的相对距离在横向上的分量与所述第二回波信号对应的相对距离在横向上的分量之和等于所述第一毫米波雷达和所述第二毫米波雷达的间距,所述第一回波信号对应的相对距离在纵向上的分量与所述第二回波信号对应的相对距离在纵向上的分量相等,确定所述第一安装角度和所述第二安装角度。
  33. 根据权利要求29至32中任一项所述的可移动平台,其中,所述处理器执行所述计算机指令时还实现:
    根据不同帧的所述第一回波信号和所述第二回波信号分别确定所述第一安装角度和所述第二安装角度,和/或针对位于不同位置的目标物体,重复执行所述控制所述第一毫米波雷达和所述第二毫米波雷达分别发射所述第一雷达信号和所述第二雷达信号的步骤,并确定相应的所述第一安装角度和所述第二安装角度;
    计算全部所述第一安装角度的平均值,作为最终的所述第一安装角度;
    计算全部所述第二安装角度的平均值,作为最终的所述第二安装角度。
  34. 根据权利要求29至32中任一项所述的可移动平台,其中,
    所述目标物体在所述重叠区域内的不同位置之间移动,以获取不同位置的所述目标物体的所述第一回波信号和所述第二回波信号。
  35. 根据权利要求29至32中任一项所述的可移动平台,其中,所述目标物体的数量为多个,所述处理器执行所述计算机指令时实现的所述根据所述第一回波信号和所述第二回波信号确定所述第一毫米波雷达的第一安装角度和所述第二毫米波雷达的第二安装角度,包括:
    针对每个所述目标物体的所述第一回波信号和所述第二回波信号,确定相应的所述第一安装角度和所述第二安装角度;
    计算全部所述第一安装角度的平均值,作为最终的所述第一安装角度;
    计算全部所述第二安装角度的平均值,作为最终的所述第二安装角度。
  36. 根据权利要求29至32中任一项所述的可移动平台,其中,
    所述目标物体为置于空旷环境中的角反射器或静态物体;
    所述可移动平台静置于所述空旷环境中。
  37. 根据权利要求36所述的可移动平台,其中,所述处理器执行所述计算机指令时实现的所述获取目标物体的所述第一回波信号和所述第二回波信号包括:
    接收同一帧的所述第一回波信号和所述第二回波信号;
    根据所述第一回波信号和所述第二回波信号分别获得相应的探测信息,所述探测信息包括目标点与发射点之间的相对距离和相对角度;
    将同时满足二者的相对距离之差小于雷达距离分辨单元、二者的相对角度之和小于第一角度门限、二者的相对角度与各自对应的粗估安装角度的偏差均小于第二角度门限的一个所述第一回波信号和一个所述第二回波信号记为所述目标物体的所述第一回波信号和所述第二回波信号。
  38. 根据权利要求37所述的可移动平台,其中,
    所述第一角度门限与所述第一毫米波雷达和所述第二毫米波雷达的安装角一致性相关;和/或
    所述第二角度门限与所述第一毫米波雷达和所述第二毫米波雷达的安装角一致性相关。
  39. 根据权利要求37所述的可移动平台,其中,
    所述第一角度门限小于10°;和/或
    所述第二角度门限小于10°。
  40. 根据权利要求29至32中任一项所述的可移动平台,其中,
    所述目标物体为可移动平台在移动过程中检测到的物体。
  41. 根据权利要求40所述的可移动平台,其中,所述处理器执行所述计算机指令时还实现:
    检测所述第一回波信号中的第一候选物体和所述第二回波信号中的第二候选物体;
    获取所述第一候选物体的第一探测信息,所述第一探测信息包括所述第一候选物体与所述第一毫米波雷达之间的相对距离和相对角度;
    获取所述第二候选物体的第二探测信息,所述第二探测信息包括所述 第二候选物体与所述第二毫米波雷达之间的相对距离和相对角度;
    根据所述第一探测信息和所述第二探测信息,确定所述第一候选物体和所述第二候选物体为同一物体,且为所述目标物体。
  42. 根据权利要求41所述的可移动平台,其中,所述处理器执行所述计算机指令时实现的所述根据所述第一探测信息和所述第二探测信息,确定所述第一候选物体和所述第二候选物体为同一物体,且为所述目标物体,包括:
    根据所述第一探测信息、所述第二探测信息、所述第一毫米波雷达的粗估安装角度和所述第二毫米波雷达的粗估安装角度确定所述第一候选物体和所述第二候选物体的位置;
    确定间距小于预设间距的所述第一候选物体和所述第二候选物体为同一物体,且为所述目标物体。
  43. 一种计算机可读存储介质,其上存储有计算机程序,其中,所述计算机程序被处理器执行时实现如权利要求1至14中任一项所述的毫米波雷达组件安装角度的标定方法的步骤。
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