WO2022116213A1 - 提高雷达系统激光测距能力的方法、装置及存储介质 - Google Patents

提高雷达系统激光测距能力的方法、装置及存储介质 Download PDF

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Publication number
WO2022116213A1
WO2022116213A1 PCT/CN2020/134096 CN2020134096W WO2022116213A1 WO 2022116213 A1 WO2022116213 A1 WO 2022116213A1 CN 2020134096 W CN2020134096 W CN 2020134096W WO 2022116213 A1 WO2022116213 A1 WO 2022116213A1
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Prior art keywords
laser
operating temperature
center wavelength
current
critical value
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PCT/CN2020/134096
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English (en)
French (fr)
Inventor
黄周敏
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深圳市速腾聚创科技有限公司
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Priority to CN202080004457.3A priority Critical patent/CN115136426A/zh
Priority to PCT/CN2020/134096 priority patent/WO2022116213A1/zh
Publication of WO2022116213A1 publication Critical patent/WO2022116213A1/zh

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/13Stabilisation of laser output parameters, e.g. frequency or amplitude
    • H01S3/136Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling devices placed within the cavity
    • H01S3/137Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling devices placed within the cavity for stabilising of frequency

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  • an embodiment of the present application provides a method for improving the laser ranging capability of a radar system, including:
  • a second determining module configured to determine the current center wavelength of the laser based on the current operating temperature of the laser
  • an embodiment of the present application provides an electronic device, including: a processor and a memory; wherein, the memory stores a computer program, and the computer program is adapted to be loaded by the processor and execute the second embodiment of the present application The method steps provided by the aspect.
  • FIG. 5 is another schematic flowchart of improving the laser ranging capability of a radar system according to an embodiment of the present application
  • FIG. 6 is still another schematic flowchart of improving the laser ranging capability of a radar system according to an embodiment of the present application.
  • the laser 11 can be used as the emission light source of the radar system 10.
  • the center wavelengths of the lasers commonly used in radar system ranging are 905 nm, 1064 nm, and 1550 nm.
  • the optical filter 12 is used for receiving reflected light and filtering out noise such as ambient light and stray light.
  • the drive module can be used to drive the laser to emit laser pulse signals
  • the temperature detection module can be used to detect the current working temperature of the laser and feed back the detected current working temperature of the laser to the control module.
  • the current operating temperature determines whether a temperature compensation control signal needs to be sent.
  • the temperature compensation module can be used to adjust the current operating temperature of the laser according to the received temperature compensation control signal to stabilize it within a preset temperature range.
  • the normal operating temperature range of a radar system is -45°C to 85°C.
  • the minimum critical value of the preset operating temperature range of the laser is increased to avoid the optical filter from receiving excess optical noise.
  • the laser can be The preset operating temperature range is set between 25°C and 85°C.
  • the minimum threshold value can be further adjusted according to the use environment of the radar system. For example, if the radar system is used in a country with a high ambient temperature near the equator, the preset working of the laser can be adjusted. The temperature range is set at 30°C to 85°C. If the radar system is used in a country with a low ambient temperature near the poles, the preset operating temperature range of the laser can be set at 10°C to 85°C.
  • the bandwidth of the optical filter in the embodiment of the present application may be fixed, that is, the filter is configured with a bandwidth determined according to the preset operating temperature range of the laser and the temperature change rate of the center wavelength of the laser, and the filter is used to build a radar. system.
  • the center wavelength of the laser is 905nm
  • the operating temperature of the center wavelength of the laser is 25°C
  • the preset operating temperature range of the laser is 25°C ⁇ 85°C
  • the temperature change rate of the center wavelength of the laser is 5nm/°C
  • the center wavelength of the laser is 905nm
  • the operating temperature of the center wavelength of the laser is 25°C
  • the current operating temperature of the laser is 30°C
  • the embodiment of the present application Consider setting up a temperature compensation module to heat the laser to ensure that the current center wavelength of the laser pulse emitted by the laser is within the bandwidth of the optical filter.
  • the temperature compensation module may include heating units, such as but not limited to heating resistors, heating resistance wire, etc.
  • the control module in the radar system can send a heating command to the temperature compensation module, and the temperature compensation module is used to adjust the current operating temperature of the laser from 15°C to the minimum critical value of the preset operating temperature range of 25°C, so that the center of the laser The drift of the wavelength can be reduced to 0 nm.
  • the current center wavelength of the laser diode is 905 nm, which is equal to the minimum critical value of the bandwidth of the optical filter of 905 nm.
  • the echo pulse reflected by the laser pulse emitted by the laser can pass through smoothly after irradiating the target object. optical filter.
  • the current operating temperature of the laser, the preset operating temperature range of the laser, and the temperature change rate of the laser's center wavelength can be obtained; based on the preset operating temperature range of the laser and the center wavelength temperature change rate of the laser, the optical filter can be determined. the bandwidth of the optical filter, and build the radar system based on the bandwidth of the optical filter; determine the current center wavelength of the laser based on the current operating temperature of the laser; when the current operating temperature of the laser is less than the minimum critical value of the preset operating temperature range, heat the laser Until the current operating temperature of the laser reaches at least the minimum critical value of the preset operating temperature range, so that the current center wavelength of the laser is not less than the minimum critical value of the bandwidth of the optical filter. Therefore, the embodiments of the present application can reduce the light noise such as ambient light incident on the radar system by maintaining the operating temperature of the laser, thereby improving the anti-interference ability and ranging ability of the radar system.
  • the embodiments of the present application may stop heating the laser when the current operating temperature of the laser is greater than the minimum critical value of the preset operating temperature range.
  • a technical solution of low temperature heating + normal temperature heat dissipation may be considered: when the temperature detection module detects that the laser is currently When the working ambient temperature is lower than the minimum critical value of the preset working temperature range, the temperature compensation module is used to heat the laser. When the temperature detection module detects that the current working ambient temperature of the laser is greater than the minimum critical value of the preset working temperature range, The heating is stopped, and further, the ambient temperature at which the laser is currently working is maintained by the heat emitted by each module in the radar system during operation.
  • the application adopts the combination of low-temperature heating and normal-temperature heat dissipation to maintain the ambient temperature of the laser operation, which can not only reduce the cost of the temperature compensation module, but also avoid the system aging that may be caused by the modules in the radar system being under too high temperature. Too fast and so on.
  • a flowchart of a method for improving the laser ranging capability of a radar system is provided.
  • the method for improving the laser ranging capability of a radar system may include the following steps:
  • S401 is consistent with S301, and details are not repeated here.
  • the nominal temperature is used to represent the operating temperature corresponding to the center wavelength of the laser.
  • S403 Determine the first temperature difference based on the nominal temperature of the laser and the minimum critical value in the preset operating temperature range of the laser.
  • 0.
  • 60°C.
  • the nominal temperature of the laser is 25°C
  • the preset operating temperature range of the laser is 25°C to 85°C
  • the first temperature difference is 0°C
  • the second temperature difference is 60°C
  • the temperature change rate of the center wavelength of the laser is 6nm/°C
  • the center wavelength drift of the laser is ⁇ 1, ⁇ 2, and the center wavelength of the laser is ⁇ , then the center wavelength of the laser varies from ⁇ 1 to ⁇ 2. Further, the bandwidth of the optical filter can be set to ⁇ ⁇ 1 to ⁇ 2.
  • the center wavelength of the laser is 905nm
  • the operating temperature of the center wavelength of the laser is 25°C
  • the preset operating temperature range of the laser is 30°C to 85°C
  • S407 is consistent with S303, and details are not repeated here.
  • S408 is consistent with S304, and details are not repeated here.
  • a flowchart of a method for improving the laser ranging capability of a radar system is provided.
  • the method for improving the laser ranging capability of a radar system may include the following steps:
  • S501 is consistent with S301, and details are not repeated here.
  • S502 is the same as S302, and details are not repeated here.
  • the third temperature difference ⁇ T3
  • the temperature change rate of the center wavelength of the laser is 6 nm/°C
  • the current center wavelength of the laser is ⁇ 3.
  • the center wavelength of the laser is 905nm
  • the center wavelength of the laser The drift is 30nm
  • S506 is consistent with S304, and details are not repeated here.
  • a flowchart of a method for improving the laser ranging capability of a radar system is provided.
  • the method for improving the laser ranging capability of a radar system may include the following steps:
  • S601 is consistent with S301, and details are not repeated here.
  • S602 Determine the bandwidth of the optical filter based on the preset operating temperature range of the laser and the temperature change rate of the center wavelength of the laser.
  • S602 is consistent with S302, and details are not repeated here.
  • S603 is consistent with S303, and details are not repeated here.
  • a cooling unit may be considered in the temperature compensation module to cool the laser, so as to ensure that the current center wavelength of the laser pulse emitted by the laser is within the incident light of the optical filter. within the range.
  • the maximum critical value is 1205nm, and the echo pulse reflected by the laser pulse emitted by the laser after irradiating the target object can smoothly pass through the optical filter.
  • the temperature compensation module may include a cooling unit, for example, including but not limited to a TEC control circuit (Thermo Electric Cooler, semiconductor refrigerator), a start-up air cooling unit, and the like.
  • the device for improving the laser ranging capability of the radar system executes the method for improving the laser ranging capability of the radar system
  • only the division of the above functional modules is used as an example. If necessary, the above-mentioned function distribution is completed by different function modules, that is, the internal structure of the device is divided into different function modules, so as to complete all or part of the functions described above.
  • the device for improving the laser ranging capability of the radar system provided in the above embodiments and the method embodiment for improving the laser ranging capability of the radar system belong to the same concept, and the implementation process of the device is described in the method embodiment, which will not be repeated here.
  • FIG. 7 is a schematic structural diagram of an apparatus 70 for improving the laser ranging capability of a radar system provided by an exemplary embodiment of the present application.
  • the apparatus 70 for improving the laser ranging capability of a radar system may be set in electronic equipment such as a terminal device and a server, and execute the method for improving the laser ranging capability of a radar system according to any of the above-mentioned embodiments of the present application.
  • the radar system includes a laser for emitting laser light and an optical filter for receiving echo light.
  • the device 70 for improving the laser ranging capability of the radar system includes:
  • an acquisition module 71 configured to acquire the preset operating temperature range of the laser, the temperature change rate of the center wavelength of the laser, and the current operating temperature of the laser;
  • Establishing module 72 configured to determine the bandwidth of the optical filter based on the preset operating temperature range of the laser and the temperature change rate of the center wavelength of the laser, and establish the radar system based on the bandwidth of the optical filter ;
  • a determination module 73 configured to determine the current center wavelength of the laser based on the current operating temperature of the laser
  • a heating module 74 configured to heat the laser until the current operating temperature of the laser reaches at least the preset operating temperature when the current operating temperature of the laser is less than the minimum critical value of the preset operating temperature range The minimum critical value of the range so that the current center wavelength of the laser is not less than the minimum critical value of the bandwidth of the optical filter.
  • the current operating temperature of the laser, the preset operating temperature range of the laser, and the temperature change rate of the laser's center wavelength can be obtained; based on the preset operating temperature range of the laser and the center wavelength temperature change rate of the laser, the optical filter can be determined. the bandwidth of the optical filter, and build the radar system based on the bandwidth of the optical filter; determine the current center wavelength of the laser based on the current operating temperature of the laser; when the current operating temperature of the laser is less than the minimum critical value of the preset operating temperature range, heat the laser Until the current operating temperature of the laser reaches at least the minimum critical value of the preset operating temperature range, so that the current center wavelength of the laser is not less than the minimum critical value of the bandwidth of the optical filter. Therefore, the embodiments of the present application can reduce the light noise such as ambient light incident on the radar system by maintaining the operating temperature of the laser, thereby improving the anti-interference ability and ranging ability of the radar system.
  • the apparatus further includes: a first stopping module, configured to stop the operation of the laser diode when the current operating temperature of the laser diode is greater than a minimum critical value of the preset operating temperature range The laser heats up.
  • the establishing module 72 includes:
  • an acquisition unit configured to acquire the nominal temperature of the laser; wherein the nominal temperature is used to represent the operating temperature corresponding to the center wavelength of the laser;
  • a first determining unit configured to determine a first temperature difference based on a nominal temperature of the laser and a minimum critical value in a preset operating temperature range of the laser
  • a second determining unit configured to determine a second temperature difference based on the nominal temperature of the laser and the maximum critical value in the preset operating temperature range of the laser
  • a third determining unit configured to determine the center wavelength drift of the laser based on the first temperature difference, the second temperature difference, and the temperature change rate of the center wavelength of the laser
  • the fourth determination unit is configured to determine the bandwidth of the optical filter based on the center wavelength shift of the laser.
  • the determining module 73 includes:
  • a fifth determining unit configured to determine a third temperature difference based on the nominal temperature of the laser and the current operating temperature of the laser
  • a sixth determination unit configured to determine the drift amount of the center wavelength based on the third temperature difference and the center wavelength temperature change rate of the laser
  • a seventh determination unit configured to determine the current center wavelength of the laser based on the center wavelength and the drift amount of the center wavelength.
  • the acquiring module 71 specifically configured to acquire the current operating temperature of the laser unit, includes: acquiring the current operating temperature of the laser at preset time intervals.
  • the apparatus further includes: a cooling module, configured to cool the laser until the current operating temperature of the laser is greater than a maximum critical value of the preset operating temperature range The current operating temperature of the laser reaches at least the maximum critical value of the preset operating temperature range, so that the current center wavelength of the laser is not greater than the maximum critical value of the bandwidth of the optical filter.
  • a cooling module configured to cool the laser until the current operating temperature of the laser is greater than a maximum critical value of the preset operating temperature range The current operating temperature of the laser reaches at least the maximum critical value of the preset operating temperature range, so that the current center wavelength of the laser is not greater than the maximum critical value of the bandwidth of the optical filter.
  • the apparatus further includes: a second stop module, configured to stop the laser operation when the current operating temperature of the laser is less than the maximum critical value of the preset operating temperature range Cool down.
  • the electronic device 80 may include: at least one processor 801 , at least one network interface 804 , user interface 803 , memory 805 , and at least one communication bus 802 .
  • the communication bus 802 is used to realize the connection and communication between these components.
  • the user interface 803 may include a display screen (Display) and a camera (Camera), and the optional user interface 803 may also include a standard wired interface and a wireless interface.
  • Display display screen
  • Camera Camera
  • the optional user interface 803 may also include a standard wired interface and a wireless interface.
  • the network interface 804 may optionally include a standard wired interface and a wireless interface (eg, a WI-FI interface).
  • the processor 801 may include one or more processing cores.
  • the processor 801 uses various excuses and lines to connect various parts of the entire electronic device 80, and executes by running or executing the instructions, programs, code sets or instruction sets stored in the memory 805, and calling the data stored in the memory 805.
  • Various functions of the electronic device 80 and processing data may adopt at least one of digital signal processing (Digital Signal Processing, DSP), field-programmable gate array (Field-Programmable Gate Array, FPGA), and programmable logic array (Programmable Logic Array, PLA). implemented in a hardware form.
  • DSP Digital Signal Processing
  • FPGA Field-Programmable Gate Array
  • PLA programmable logic array
  • the processor 801 may integrate one or a combination of a central processing unit (Central Processing Unit, CPU), a graphics processor (Graphics Processing Unit, GPU), a modem, and the like.
  • CPU Central Processing Unit
  • GPU Graphics Processing Unit
  • the CPU mainly handles the operating system, user interface and application programs, etc.
  • the GPU is used for rendering and drawing the content that needs to be displayed on the display screen
  • the modem is used to handle wireless communication. It can be understood that, the above-mentioned modem may not be integrated into the processor 801, but is implemented by a single chip.
  • the memory 805 may include random access memory (Random Access Memory, RAM), or may include read-only memory (Read-Only Memory).
  • the memory 805 includes a non-transitory computer-readable storage medium.
  • Memory 805 may be used to store instructions, programs, codes, sets of codes, or sets of instructions.
  • the memory 805 may include a stored program area and a stored data area, wherein the stored program area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playback function, an image playback function, etc.), Instructions and the like used to implement the above method embodiments; the storage data area may store the data and the like involved in the above method embodiments.
  • the memory 805 can optionally also be at least one storage device located away from the aforementioned processor 801 .
  • the memory 805 as a computer storage medium may include an operating system, a network communication module, a user interface module, and an application program for improving the laser ranging capability of the radar system.
  • the user interface 803 is mainly used to provide an input interface for the user to obtain the data input by the user; and the processor 801 can be used to call the improved laser ranging capability of the radar system stored in the memory 805 application, and specifically do the following:
  • the processor 810 is further configured to perform: in the case that the current operating temperature of the laser diode is greater than the minimum critical value of the preset operating temperature range, stop the operation of the laser heating.
  • the processor 810 when the processor 810 determines the bandwidth of the optical filter based on the preset operating temperature range of the laser and the temperature change rate of the center wavelength of the laser, the processor 810 specifically executes:
  • the nominal temperature is used to represent the operating temperature corresponding to the center wavelength of the laser;
  • the bandwidth of the optical filter is determined based on the center wavelength shift of the laser.
  • the processor 810 when the processor 810 executes the determining of the current center wavelength of the laser based on the current operating temperature of the laser, the processor 810 specifically executes:
  • the current center wavelength of the laser is determined.
  • the processor 810 when the processor 810 acquires the current operating temperature of the laser, the processor 810 specifically executes: acquiring the current operating temperature of the laser according to a preset time interval.
  • the processor 810 is further configured to perform: when the current operating temperature of the laser is greater than the maximum critical value of the preset operating temperature range, cooling the laser until the The current operating temperature of the laser reaches at least the maximum critical value of the preset operating temperature range, so that the current center wavelength of the laser is not greater than the maximum critical value of the bandwidth of the optical filter.
  • the processor 810 is further configured to perform: when the current operating temperature of the laser is less than the maximum critical value of the preset operating temperature range, stop cooling the laser .
  • Embodiments of the present application further provide a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the computer or processor is run on a computer or a processor, the computer or the processor is made to execute the steps shown in FIGS. 3 to 6 above. one or more steps in an example embodiment. If each component module of the device for improving the laser ranging capability of a radar system is implemented in the form of software functional units and sold or used as an independent product, it can be stored in the computer-readable storage medium.
  • the above-mentioned embodiments it may be implemented in whole or in part by software, hardware, firmware or any combination thereof.
  • software it can be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated.
  • the computer may be a general purpose computer, special purpose computer, computer network, or other programmable device.
  • the computer instructions may be stored in or transmitted over a computer-readable storage medium.
  • the computer instructions can be sent from a website site, computer, server, or data center via wired (eg, coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.) another website site, computer, server or data center for transmission.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes an integration of one or more available media.
  • the available media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, Digital Versatile Disc (DVD)), or semiconductor media (eg, Solid State Disk, SSD)) etc.
  • the aforementioned storage medium includes: a system memory (Read Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk or an optical disk and other media that can store program codes.
  • ROM Read Only Memory
  • RAM Random Access Memory
  • magnetic disk or an optical disk and other media that can store program codes.

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Abstract

一种提高雷达系统激光测距能力的方法、装置及存储介质,该方法包括:通过获取激光器的当前工作温度、激光器的预设工作温度范围、以及激光器的中心波长温度变化率(S301);基于激光器的预设工作温度范围和激光器的中心波长温度变化率,确定光学滤波片的带宽,并基于光学滤波片的带宽建立雷达系统(S302);基于激光器的当前工作温度确定激光器的当前中心波长(S303);在激光器的当前工作温度小于预设工作温度范围的最小临界值的情况下,加热激光器直到激光器的当前工作温度至少达到预设工作温度范围的最小临界值(S304)。本方法可以通过维持激光器的工作温度的方式,减少入射到雷达系统的环境光等光噪声,从而提高雷达系统的抗干扰能力和测距能力。

Description

提高雷达系统激光测距能力的方法、装置及存储介质 技术领域
本申请涉及测量领域,具体涉及一种提高雷达系统激光测距能力的方法和装置、电子设备和存储介质。
背景技术
目前,在使用雷达系统进行激光测距时,普遍存在激光二极管(Laser diode,LD)的中心波长随温度变化而漂移的现象。当激光二极管在全温范围内进行工作时,激光二极管的中心波长漂移范围较宽,需要的光学滤波片的带宽也相应变宽,导致雷达系统接收到更多的环境光噪声,雷达系统的抗干扰能力下降了。
发明内容
本申请实施例提供了一种提高雷达系统激光测距能力的方法和装置、电子设备和存储介质。
第一方面,本申请实施例提供了一种提高雷达系统激光测距能力的方法,包括:
所述雷达系统包括用于发射光源的激光器和用于接收回波脉冲的光学滤波片,所述方法包括:
获取所述激光器的当前工作温度、所述激光器的预设工作温度范围、以及所述激光器的中心波长温度变化率;
基于所述激光器的预设工作温度范围和所述激光器的中心波长温度变化率,确定所述光学滤波片的带宽;
基于所述激光器的当前工作温度确定所述激光器的当前中心波长;
在所述激光器的当前工作温度小于所述预设工作温度范围的最小临界值的情况下,加热所述激光器直到所述激光器的当前工作温度达到所述预设工作温度范围的最小临界值,以使所述激光器的当前中心波长不小于所述光学滤波片的带宽的最小临界值。
第二方面,本申请实施例提供了一种提高雷达系统激光测距能力的装置,包括:
所述雷达系统包括用于发射激光的激光器和用于接收返射激光的光学滤波片,所述装置包括:
获取模块,用于获取所述激光器的预设工作温度范围、所述激光器的中心波长温度变化率、以及所述激光器的当前工作温度;
第一确定模块,用于基于所述激光器的预设工作温度范围和所述激光器的中心波长温度变化率,确定所述光学滤波片的带宽;
第二确定模块,用于基于所述激光器的当前工作温度确定所述激光器的当前中心波长;
加热模块,用于在所述激光器的当前工作温度小于所述预设工作温度范围的最小临界值的情况下,加热所述激光器直到所述激光器的当前工作温度达到所述预设工作温度范围的最小临界值,以使所述激光器的当前中心波长不小于所述光学滤波片的带宽的最小临界值。
第三方面,本申请实施例提供了一种电子设备,包括:处理器和存储器;其中,所述存储器存储有计算机程序,所述计算机程序适于由处理器加载并执行本申请实施例第二方面提供的方法步骤。
第四方面,本申请实施例提供了一种电子设备,包括:处理器和存储器;其中,所述存储器存储有计算机程序,所述计算机程序适于由处理器加载并执行本申请实施例第三方面提供的方法步骤。
本申请一些实施例提供的技术方案带来的有益效果至少包括:
在本申请实施例中通过获取激光器的当前工作温度、激光器的预设工作温度范围、以及激光器的中心波长温度变化率;基于激光器的预设工作温度范围和激光器的中心波长温度变化率,确定光学滤波片的带宽;基于激光器的当前工作温度确定激光器的当前中心波长;在激光器的当前工作温度小于预设工作温度范围的最小临界值的情况下,加热激光器直到激光器的当前工作温度达到预设工作温度范围的最小临界值,以使激光器的当前中心波长不小于光学滤波片的带宽的最小临界值。由此,本申请实施例可以通过维持激光器的工作温度的方式,减少入射到雷达系统的环境光等光噪声,从而提高雷达系统的抗干扰 能力和测距能力。
附图说明
为了更清楚地说明本申请实施例中的技术方案,下面将对实施例中所需使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本申请的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为本申请实施例提供的一种雷达系统的应用场景图;
图2为本申请实施例提供的一种雷达系统的结构图;
图3为本申请实施例提供的一种提高雷达系统激光测距能力的流程示意图;
图4为本申请实施例提供的另一种提高雷达系统激光测距能力的流程示意图;
图5为本申请实施例提供的又一种提高雷达系统激光测距能力的流程示意图;
图6为本申请实施例提供的再一种提高雷达系统激光测距能力的流程示意图;
图7为本申请实施例提供的一种提高雷达系统激光测距能力的装置的结构示意图;
图8为本申请实施例提供的一种电子设备的结构示意图。
具体实施方式
下面的描述涉及附图时,除非另有表示,不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本申请相一致的所有实施方式。相反,它们仅是如所附权利要求书中所详述的、本申请的一些方面相一致的装置和方法的例子。
在本申请的描述中,需要理解的是,术语“第一”、“第二”等仅用于描述目的,而不能理解为指示或暗示相对重要性。对于本领域的普通技术人员而言,可以具体情况理解上述术语在本申请中的具体含义。此外,在本申请的描 述中,除非另有说明,“多个”是指两个或两个以上。“和/或”,描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。
图1示例性示出了本申请实施例提供的雷达系统的应用场景图。如图1所示,雷达系统10可以包括:激光器11和光学滤波片12。其中:
激光器11可以用作该雷达系统10的发射光源,目前,常用于雷达系统测距的激光器的中心波长有905nm、1064nm和1550nm等。光学滤波片12用于接收反射光并滤除环境光和杂散光等噪声。
具体地,将激光器11对准视场发射一个激光脉冲,然后通过光学滤波片12接收从目标反射回来的回波脉冲(回波光),通过测定脉冲往返的飞行时间和已知光速,计算待测目标的距离。
图2示例性示出了本申请实施例提供的雷达系统的结构示意图。如图2所示,雷达系统可以包括:激光器、驱动模块、温度补偿模块、温度检测模块、以及控制模块。其中:
驱动模块可以用于驱动激光器发射激光脉冲信号,温度检测模块可以用于检测激光器的当前工作温度并将检测到的激光器的当前工作温度反馈至控制模块,控制模块可以用于根据检测到的激光器的当前工作温度确定是否需要发送温度补偿控制信号。温度补偿模块可以用于根据接收到的温度补偿控制信号调节激光器的当前工作温度以将其稳定在预设温度范围内。
接下来接合图1介绍的雷达系统的应用场景及图2介绍的雷达系统的结构,来介绍本申请实施例提供的提高雷达系统激光测距能力的方法,该方法可由上述雷达系统执行。
在一个实施例中,图3所示,提供了一种提高雷达系统激光测距能力的方法流程图。如图3所示,该提高雷达系统激光测距能力的方法可以包括如下步骤:
S301,获取激光器的当前工作温度、激光器的预设工作温度范围、以及激光器的中心波长温度变化率。
其中,激光器的当前工作温度可以通过设于温度检测模块中的温度传感器 或热敏电阻等获得。激光器的中心波长温度变化率λ 0一般在3nm/℃~7nm/℃。
一般情况下,雷达系统的正常工作温度范围在-45℃~85℃,本申请将激光器的预设工作温度范围的最小临界值提高以避免光学滤波片接收多余的光噪声,例如,可以将激光器的预设工作温度范围设置在25℃~85℃。
此外,由于使用雷达系统的地理环境不同,还可以根据雷达系统的使用环境对最小临界值做进一步调整,例如,如果雷达系统应用在赤道附近环境温度较高的国家,可以将激光器的预设工作温度范围设置在30℃~85℃,如果雷达系统应用在极地附近环境温度较低的国家,可以将激光器的预设工作温度范围设置在10℃~85℃。
优选地,本申请实施例还可以按照预设时间间隔获取激光器的当前工作温度,例如,在温度检测模块中设置定时器,每隔0.01s获取激光器的当前工作温度。
S302,基于激光器的预设工作温度范围和激光器的中心波长温度变化率,确定光学滤波片的带宽,并基于光学滤波片的带宽建立雷达系统。
可能地,本申请实施例中光学滤波片的带宽可以是固定的,即采用根据激光器的预设工作温度范围和激光器的中心波长温度变化率确定的带宽配置滤波片,并利用该滤波片建立雷达系统。
可能地,本申请实施例中光学滤波片是可调滤波片的,即雷达系统中的滤波片的带宽可以通过控制信号进行调节;雷达系统可以根据当前的工作环境调整激光器的预设工作温度范围,再由激光器的预设工作温度范围和激光器的中心波长温度变化率确定当前状态下滤波片的最佳带宽,此时通过控制信号调节可调滤波片的带宽,使可调滤波片的带宽匹配最佳带宽。
例如,若激光器的中心波长为905nm,激光器的中心波长的工作温度为25℃,激光器的预设工作温度范围为25℃~85℃,激光器的中心波长温度变化率5nm/℃,则激光器的中心波长随温度的漂移量为(85-25)℃*5nm/℃=300nm,则光学滤波片的带宽可以设置在905nm~1205nm。
可能地,本申请实施例可以考虑光学滤波片的折射率误差等因素,光学滤波片设置时带有一定余量,例如将光学滤波片的带宽可以设置在(905±5)nm~(1205±5)nm。
S303,基于激光器的当前工作温度确定激光器的当前中心波长。
举例来说,假设激光器的中心波长为905nm,激光器的中心波长的工作温度为25℃,激光器的当前工作温度为30℃,则激光器的中心波长随温度的漂移量为(30-25)℃*5nm/℃=25nm,激光器的当前中心波长为:905+25=930nm。
S304,在激光器的当前工作温度小于预设工作温度范围的最小临界值的情况下,加热激光器直到激光器的当前工作温度达到预设工作温度范围的最小临界值,以使激光器的当前中心波长不小于光学滤波片的带宽的最小临界值。
具体地,在激光器的当前工作温度小于预设工作温度范围的最小临界值的情况下,由于激光脉冲的中心波长随温度产生漂移量,导致激光器发出的激光脉冲的当前中心波长不在光学滤波片的带宽范围内,激光脉冲对应的回波脉冲无法穿过光学滤波片进入雷达系统,使得雷达系统无法接收到回波脉冲,从而无法测量当前位置与目标物体之间的距离,因此,本申请实施例可以考虑设置温度补偿模块,对激光器进行加热,以确保激光器发出的激光脉冲的当前中心波长在光学滤波片的带宽范围内,其中,温度补偿模块可以包括加热单元,例如但不限于发热电阻、发热电阻丝等。
例如,假设激光器的预设工作温度范围25℃~85℃,光学滤波片的带宽905nm~1205nm,激光器的当前工作温度为15℃,激光器的中心波长的工作温度为25℃,激光器的中心波长为905nm,激光器的中心波长温度变化率5nm/℃,则激光器的当前中心波长为905-(25-15)*5=855nm,低于光学滤波片的带宽最小临界值905nm,激光器的回波脉冲无法通过光学滤波片,雷达系统中的控制模块可以向温度补偿模块发出升温指令,利用温度补偿模块将激光器的当前工作温度15℃调整到预设工作温度范围的最小临界值25℃,这样激光器的中心波长的漂移量就可以缩减到0nm,激光二极管的当前中心波长为905nm,等于光学滤波片的带宽的最小临界值905nm,激光器发出的激光脉冲在照射到目标物体后反射的回波脉冲可以顺利通过光学滤波片。
本申请实施例可以通过获取激光器的当前工作温度、激光器的预设工作温度范围、以及激光器的中心波长温度变化率;基于激光器的预设工作温度范围和激光器的中心波长温度变化率,确定光学滤波片的带宽,并基于光学滤波片的带宽建立雷达系统;基于激光器的当前工作温度确定激光器的当前中心波长; 在激光器的当前工作温度小于预设工作温度范围的最小临界值的情况下,加热激光器直到激光器的当前工作温度至少达到预设工作温度范围的最小临界值,以使激光器的当前中心波长不小于光学滤波片的带宽的最小临界值。由此,本申请实施例可以通过维持激光器的工作温度的方式,减少入射到雷达系统的环境光等光噪声,从而提高雷达系统的抗干扰能力和测距能力。
在一些可能的实施方式中,本申请实施例可以在激光器的当前工作温度大于预设工作温度范围的最小临界值的情况下,停止对激光器进行加热。
具体地,由于雷达系统自身的运行也会产生一定的热量,使得激光器工作的环境温度上升,因此,本申请实施例可以考虑采用低温加热+常温散热的技术方案:当温度检测模块检测到激光器当前工作的环境温度低于预设工作温度范围的最小临界值时,使用温度补偿模块对激光器进行加热,当温度检测模块检测到激光器当前工作的环境温度大于预设工作温度范围的最小临界值时,停止加热,进一步地,通过雷达系统中各模块在运行时散发的热量维持激光器当前工作的环境温度。
本申请采用低温加热和常温散热进行配合的方式来维持激光器工作的环境温度,不仅可以降低温度补偿模块的成本,还可以避免雷达系统中的各模块处于过高的温度下,可能导致的系统老化过快等问题。
在一个实施例中,图4所示,提供了一种提高雷达系统激光测距能力的方法流程图。如图4所示,该提高雷达系统激光测距能力的方法可以包括如下步骤:
S401,获取激光器的当前工作温度、激光器的预设工作温度范围、以及激光器的中心波长温度变化率。
具体地,S401与S301一致,此处不再赘述。
S402,获取激光器的标称温度。
其中,标称温度用于表示激光器的中心波长对应的工作温度。
S403,基于激光器的标称温度和激光器的预设工作温度范围中的最小临界值,确定第一温差。
具体地,若激光器的标称温度T0,激光器的预设工作温度范围T1~T2,则第一温差为ΔΤ1=|T1-T0|。
例如,假设激光器的标称温度25℃,激光器的预设工作温度范围25℃~85℃,则第一温差为ΔΤ1=|25℃-25℃|=0。
S404,基于激光器的标称温度和激光器的预设工作温度范围中的最大临界值,确定第二温差。
具体地,若激光器的标称温度T0,激光器的预设工作温度范围T1~T2,则第二温差为ΔΤ2=|T2-T0|。
例如,假设激光器的标称温度25℃,激光器的预设工作温度范围25℃~85℃,则第二温差为ΔΤ2=|85℃-25℃|=60℃。
S405,基于第一温差、第二温差、以及激光器的中心波长的温度变化率,确定激光器的中心波长漂移量。
具体地,若第一温差为ΔΤ1、第二温差为ΔΤ2,激光器的中心波长的温度变化率为λ 0,则激光器的中心波长漂移量Δλ1=ΔΤ1×λ 0,Δλ2=ΔΤ2×λ 0
例如,假设激光器的标称温度25℃,激光器的预设工作温度范围25℃~85℃,则第一温差为0℃,第二温差为60℃,激光器的中心波长温度变化率6nm/℃,光器的中心波长漂移量为6nm/℃x0℃=0nm、6nm/℃x60℃=360nm。
S406,基于激光器的中心波长漂移量确定光学滤波片的带宽。
具体地,激光器的中心波长漂移量为Δλ1、Δλ2,激光器的中心波长为λ,则激光器的中心波长变化范围在λ±Δλ1~λ±Δλ2,进一步地,可以将光学滤波片的带宽设置为λ±Δλ1~λ±Δλ2。
例如,若激光器的中心波长为905nm,激光器的中心波长的工作温度为25℃,激光器的预设工作温度范围为30℃~85℃,则第一温差为30℃-25℃=5℃,第二温差为85℃-25℃=60℃,若激光器的中心波长温度变化率6nm/℃,则激光器的中心波长漂移量为5℃*6nm/℃=30nm,60℃*6nm/℃=360nm,激光器的中心波长变化范围在(905+30=935)nm~(905+360=1265)nm,进一步地,光学滤波片的带宽可以设置在935nm~1265nm。
S407,基于激光器的当前工作温度确定激光器的当前中心波长。
具体地,S407与S303一致,此处不再赘述。
S408,在激光器的当前工作温度小于预设工作温度范围的最小临界值的情况下,加热激光器直到所述激光器的当前工作温度达到预设工作温度范围的最 小临界值,以使激光器的当前中心波长不小于光学滤波片的带宽的最小临界值。
具体地,S408与S304一致,此处不再赘述。
在一个实施例中,图5所示,提供了一种提高雷达系统激光测距能力的方法流程图。如图5所示,该提高雷达系统激光测距能力的方法可以包括如下步骤:
S501,获取激光器的当前工作温度、激光器的预设工作温度范围、以及激光器的中心波长温度变化率。
具体地,S501与S301一致,此处不再赘述。
S502,基于激光器的预设工作温度范围和激光器的中心波长温度变化率,确定光学滤波片的带宽,并基于所述光学滤波片的带宽建立所述雷达系统。
具体地,S502与S302一致,此处不再赘述。
S503,基于激光器的标称温度和激光器的当前工作温度,确定第三温差。
具体地,假设激光器的当前工作温度T,激光器的标称温度T0,则第三温差ΔΤ3=|T-T0|,例如,激光器的当前工作温度20℃,激光器的中心波长对应的工作温度25℃,则第三温差为(25-20)=5℃。
S504,基于第三温差和激光器的中心波长温度变化率,确定中心波长的漂移量。
具体地,若第三温差为ΔΤ3,激光器的中心波长的温度变化率为λ 0,则激光器的中心波长漂移量Δλ3=λ 0×ΔΤ3,例如,若激光器的中心波长温度变化率6nm/℃,第三温差为5℃,则激光器的中心波长的漂移量为6nm/℃*5℃=30nm。
S505,基于中心波长和中心波长的漂移量,确定激光器的当前中心波长。
具体地,若激光器的中心波长漂移量为Δλ3,激光器的中心波长为λ,则激光器的当前中心波长为λ±Δλ3,例如,激光器的中心波长为905nm,激光器的中心波长的漂移量为30nm,则激光器的当前中心波长为:905-30=875nm。
S506,在激光器的当前工作温度小于预设工作温度范围的最小临界值的情况下,加热激光器直到激光器的当前工作温度至少达到预设工作温度范围的最小临界值,以使激光器的当前中心波长不小于光学滤波片的带宽的最小临界值。
具体地,S506与S304一致,此处不再赘述。
在一个实施例中,图6所示,提供了一种提高雷达系统激光测距能力的方法流程图。如图6所示,该提高雷达系统激光测距能力的方法可以包括如下步骤:
S601,获取激光器的当前工作温度、激光器的预设工作温度范围、以及激光器的中心波长温度变化率。
具体地,S601与S301一致,此处不再赘述。
S602,基于激光器的预设工作温度范围和激光器的中心波长温度变化率,确定光学滤波片的带宽。
具体地,S602与S302一致,此处不再赘述。
S603,基于激光器的当前工作温度确定激光器的当前中心波长。
具体地,S603与S303一致,此处不再赘述。
S604,在激光器的当前工作温度大于预设工作温度范围的最大临界值的情况下,冷却激光器直到激光器的当前工作温度至少达到预设工作温度范围的最大临界值,以使激光器的当前中心波长不大于光学滤波片的带宽的最大临界值。
具体地,在激光器的当前工作温度大于预设工作温度范围的最大临界值的情况下,激光器发出的激光脉冲的当前中心波长不在光学滤波片的入射光范围内,这样就会导致雷达系统无法测量当前位置与目标物体之间的距离,因此,本申请实施例可以考虑在温度补偿模块内设置冷却单元,对激光器进行冷却,以确保激光器发出的激光脉冲的当前中心波长在光学滤波片的入射光范围内。
例如,当激光器的当前工作温度为90℃时,激光器的当前中心波长为(90-25)×5+905=1280nm,超过光学滤波片的带宽最大临界值(85-25)×5+905=1205nm,激光器的回波脉冲无法通过光学滤波片,则雷达系统中的控制模块可以向温度补偿模块发出冷却指令,利用温度补偿模块将激光器的当前工作温度调整到预设工作温度范围的最大临界值85℃,这样激光器的中心波长的漂移量就可以缩减到(85-25)℃*5nm/℃=300nm,激光器的当前中心波长为905+300=1205nm,等于光学滤波片的带宽605nm~1205nm的最大临界值1205nm,激光器发出的激光脉冲在照射到目标物体后反射的回波脉冲可以顺利通过光学滤波片。其中,温度补偿模块可以包括冷却单元,例如包括但不限于TEC控制电路(Thermo Electric Cooler,半导体制冷器)、启动风冷单元 等。
需要说明的是,上述实施例提供的提高雷达系统激光测距能力的装置在执行提高雷达系统激光测距能力的方法时,仅以上述各功能模块的划分进行举例说明,实际应用中,可以根据需要而将上述功能分配由不同的功能模块完成,即将设备的内部结构划分成不同的功能模块,以完成以上描述的全部或者部分功能。另外,上述实施例提供的提高雷达系统激光测距能力的装置与提高雷达系统激光测距能力的方法实施例属于同一构思,其体现实现过程详见方法实施例,这里不再赘述。
上述本申请实施例序号仅仅为了描述,不代表实施例的优劣。
图7是本申请一示例性实施例提供的提高雷达系统激光测距能力的装置70的结构示意图。该提高雷达系统激光测距能力的装置70可以设置于终端设备、服务器等电子设备中,执行本申请上述任一实施例的提高雷达系统激光测距能力的方法。其中,所述雷达系统包括用于发射激光的激光器和用于接收回波光的光学滤波片,如图7所示,该提高雷达系统激光测距能力的装置70包括:
获取模块71,用于获取所述激光器的预设工作温度范围、所述激光器的中心波长温度变化率、以及所述激光器的当前工作温度;
建立模块72,用于基于所述激光器的预设工作温度范围和所述激光器的中心波长温度变化率,确定所述光学滤波片的带宽,并基于所述光学滤波片的带宽建立所述雷达系统;;
确定模块73,用于基于所述激光器的当前工作温度确定所述激光器的当前中心波长;
加热模块74,用于在所述激光器的当前工作温度小于所述预设工作温度范围的最小临界值的情况下,加热所述激光器直到所述激光器的当前工作温度至少达到所述预设工作温度范围的最小临界值,以使所述激光器的当前中心波长不小于所述光学滤波片的带宽的最小临界值。
本申请实施例可以通过获取激光器的当前工作温度、激光器的预设工作温度范围、以及激光器的中心波长温度变化率;基于激光器的预设工作温度范围 和激光器的中心波长温度变化率,确定光学滤波片的带宽,并基于光学滤波片的带宽建立雷达系统;基于激光器的当前工作温度确定激光器的当前中心波长;在激光器的当前工作温度小于预设工作温度范围的最小临界值的情况下,加热激光器直到激光器的当前工作温度至少达到预设工作温度范围的最小临界值,以使激光器的当前中心波长不小于光学滤波片的带宽的最小临界值。由此,本申请实施例可以通过维持激光器的工作温度的方式,减少入射到雷达系统的环境光等光噪声,从而提高雷达系统的抗干扰能力和测距能力。
在一些可能的实施例中,所述装置还包括:第一停止模块,用于在所述激光二极管的当前工作温度大于所述预设工作温度范围的最小临界值的情况下,停止对所述激光器进行加热。
在一些可能的实施例中,所述建立模块72,包括:
获取单元,用于获取所述激光器的标称温度;其中,所述标称温度用于表示所述激光器的中心波长对应的工作温度;
第一确定单元,用于基于所述激光器的标称温度和所述激光器的预设工作温度范围中的最小临界值确定第一温差;
第二确定单元,用于基于所述激光器的标称温度和所述激光器的预设工作温度范围中的最大临界值确定第二温差;
第三确定单元,用于基于所述第一温差、所述第二温差、以及激光器的中心波长的温度变化率,确定所述激光器的中心波长漂移量;
第四确定单元,用于基于所述激光器的中心波长漂移量确定光学滤波片的带宽。
在一些可能的实施例中,所述确定模块73,包括:
第五确定单元,用于基于所述激光器的标称温度和所述激光器的当前工作温度确定第三温差;
第六确定单元,用于基于所述第三温差和所述激光器的中心波长温度变化率,确定所述中心波长的漂移量;
第七确定单元,用于基于所述中心波长和所述中心波长的漂移量,确定所述激光器的当前中心波长。
在一些可能的实施例中,所述获取模块71,具体用于所述获取所述激光 单元的当前工作温度,包括:按照预设时间间隔获取所述激光器的当前工作温度。
在一些可能的实施例中,所述装置还包括:冷却模块,用于在所述激光器的当前工作温度大于所述预设工作温度范围的最大临界值的情况下,冷却所述激光器直到所述激光器的当前工作温度至少达到所述预设工作温度范围的最大临界值,以使所述激光器的当前中心波长不大于所述光学滤波片的带宽的最大临界值。
在一些可能的实施例中,所述装置还包括:第二停止模块,用于在所述激光器的当前工作温度小于所述预设工作温度范围的最大临界值的情况下,停止对所述激光器进行冷却。
请参见图8,为本申请实施例提供了一种电子设备的结构示意图。如图8所示,所述电子设备80可以包括:至少一个处理器801,至少一个网络接口804,用户接口803,存储器805,至少一个通信总线802。
其中,通信总线802用于实现这些组件之间的连接通信。
其中,用户接口803可以包括显示屏(Display)、摄像头(Camera),可选用户接口803还可以包括标准的有线接口、无线接口。
其中,网络接口804可选的可以包括标准的有线接口、无线接口(如WI-FI接口)。
其中,处理器801可以包括一个或者多个处理核心。处理器801利用各种借口和线路连接整个电子设备80内的各个部分,通过运行或执行存储在存储器805内的指令、程序、代码集或指令集,以及调用存储在存储器805内的数据,执行电子设备80的各种功能和处理数据。可选的,处理器801可以采用数字信号处理(Digital Signal Processing,DSP)、现场可编程门阵列(Field-Programmable Gate Array,FPGA)、可编程逻辑阵列(Programmable Logic Array,PLA)中的至少一种硬件形式来实现。处理器801可集成中央处理器(Central Processing Unit,CPU)、图像处理器(Graphics Processing Unit,GPU)和调制解调器等中的一种或几种的组合。其中,CPU主要处理操作系统、用户界面和应用程序等;GPU用于负责显示屏所需要显示的内容的渲染 和绘制;调制解调器用于处理无线通信。可以理解的是,上述调制解调器也可以不集成到处理器801中,单独通过一块芯片进行实现。
其中,存储器805可以包括随机存储器(Random Access Memory,RAM),也可以包括只读存储器(Read-Only Memory)。可选的,该存储器805包括非瞬时性计算机可读介质(non-transitory computer-readable storage medium)。存储器805可用于存储指令、程序、代码、代码集或指令集。存储器805可包括存储程序区和存储数据区,其中,存储程序区可存储用于实现操作系统的指令、用于至少一个功能的指令(比如触控功能、声音播放功能、图像播放功能等)、用于实现上述各个方法实施例的指令等;存储数据区可存储上面各个方法实施例中涉及到的数据等。存储器805可选的还可以是至少一个位于远离前述处理器801的存储装置。如图8所示,作为一种计算机存储介质的存储器805中可以包括操作系统、网络通信模块、用户接口模块以及提高雷达系统激光测距能力应用程序。
在图8所示的电子设备80中,用户接口803主要用于为用户提供输入的接口,获取用户输入的数据;而处理器801可以用于调用存储器805中存储的提高雷达系统激光测距能力应用程序,并具体执行以下操作:
获取所述激光器的当前工作温度、所述激光器的预设工作温度范围、以及所述激光器的中心波长温度变化率;
基于所述激光器的预设工作温度范围和所述激光器的中心波长温度变化率,确定所述光学滤波片的带宽,并基于所述光学滤波片的带宽建立所述雷达系统;
基于所述激光器的当前工作温度确定所述激光器的当前中心波长;
在所述激光器的当前工作温度小于所述预设工作温度范围的最小临界值的情况下,加热所述激光器直到所述激光器的当前工作温度至少达到所述预设工作温度范围的最小临界值,以使所述激光器的当前中心波长不小于所述光学滤波片的带宽的最小临界值。
在一种可能的实施例中,所述处理器810还用于执行:在所述激光二极管的当前工作温度大于所述预设工作温度范围的最小临界值的情况下,停止对所述激光器进行加热。
在一种可能的实施例中,所述处理器810在执行基于所述激光器的预设工作温度范围和所述激光器的中心波长的温度变化率,确定光学滤波片的带宽时,具体执行:
获取所述激光器的标称温度;其中,所述标称温度用于表示所述激光器的中心波长对应的工作温度;
基于所述激光器的标称温度和所述激光器的预设工作温度范围中的最小临界值确定第一温差;
基于所述激光器的标称温度和所述激光器的预设工作温度范围中的最大临界值确定第二温差;
基于所述第一温差、所述第二温差、以及激光器的中心波长的温度变化率,确定所述激光器的中心波长漂移量;
基于所述激光器的中心波长漂移量确定光学滤波片的带宽。
在一种可能的实施例中,所述处理器810在执行所述基于所述激光器的当前工作温度确定所述激光器的当前中心波长时,具体执行:
基于所述激光器的标称温度和所述激光器的当前工作温度确定第三温差;
基于所述第三温差和所述激光器的中心波长温度变化率,确定所述中心波长的漂移量;
基于所述中心波长和所述中心波长的漂移量,确定所述激光器的当前中心波长。
在一种可能的实施例中,所述处理器810在所述获取所述激光器的当前工作温度时,具体执行:按照预设时间间隔获取所述激光器的当前工作温度。
在一种可能的实施例中,所述处理器810还用于执行:在所述激光器的当前工作温度大于所述预设工作温度范围的最大临界值的情况下,冷却所述激光器直到所述激光器的当前工作温度至少达到所述预设工作温度范围的最大临界值,以使所述激光器的当前中心波长不大于所述光学滤波片的带宽的最大临界值。
在一种可能的实施例中,所述处理器810还用于执行:在所述激光器的当前工作温度小于所述预设工作温度范围的最大临界值的情况下,停止对所述激光器进行冷却。
本申请实施例还提供了一种计算机可读存储介质,该计算机可读存储介质中存储有指令,当其在计算机或处理器上运行时,使得计算机或处理器执行上述图3-图6所示实施例中的一个或多个步骤。上述提高雷达系统激光测距能力装置的各组成模块如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在所述计算机可读取存储介质中。
在上述实施例中,可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时,可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时,全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中,或者通过所述计算机可读存储介质进行传输。所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(Digital Subscriber Line,DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质,(例如,软盘、硬盘、磁带)、光介质(例如,数字多功能光盘(Digital Versatile Disc,DVD))、或者半导体介质(例如,固态硬盘(Solid State Disk,SSD))等。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程,可以通过计算机程序来指令相关的硬件来完成,该程序可存储于计算机可读取存储介质中,该程序在执行时,可包括如上述各方法的实施例的流程。而前述的存储介质包括:制度存储器(Read Only Memory,ROM)、随机存取存储器(Random Access Memory,RAM)、磁碟或者光盘等各种可存储程序代码的介质。在不冲突的情况下,本实施例和实施方案中的技术特征可以任意组合。
以上所述的实施例仅仅是本申请的优选实施例方式进行描述,并非对本申请的范围进行限定,在不脱离本申请的设计精神的前提下,本领域普通技术人员对本申请的技术方案作出的各种变形及改进,均应落入本申请的权利要求书 确定的保护范围内。

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  1. 一种提高雷达系统激光测距能力的方法,其特征在于,所述雷达系统包括用于发射光源的激光器和用于接收回波光的光学滤波片,所述方法包括:
    获取所述激光器的当前工作温度、所述激光器的预设工作温度范围、以及所述激光器的中心波长温度变化率;
    基于所述激光器的预设工作温度范围和所述激光器的中心波长温度变化率,确定所述光学滤波片的带宽,并基于所述光学滤波片的带宽建立所述雷达系统;
    基于所述激光器的当前工作温度确定所述激光器的当前中心波长;
    在所述激光器的当前工作温度小于所述预设工作温度范围的最小临界值的情况下,加热所述激光器直到所述激光器的当前工作温度至少达到所述预设工作温度范围的最小临界值,以使所述激光器的当前中心波长不小于所述光学滤波片的带宽的最小临界值。
  2. 根据权利要求1所述的方法,其特征在于,所述方法还包括:在所述激光二极管的当前工作温度大于所述预设工作温度范围的最小临界值的情况下,停止对所述激光器进行加热。
  3. 根据权利要求1所述的方法,其特征在于,所述基于所述激光器的预设工作温度范围和所述激光器的中心波长的温度变化率,确定光学滤波片的带宽,包括:
    获取所述激光器的标称温度;其中,所述标称温度用于表示所述激光器的中心波长对应的工作温度;
    基于所述激光器的标称温度和所述激光器的预设工作温度范围中的最小临界值确定第一温差;
    基于所述激光器的标称温度和所述激光器的预设工作温度范围中的最大临界值确定第二温差;
    基于所述第一温差、所述第二温差、以及激光器的中心波长的温度变化率, 确定所述激光器的中心波长漂移量;
    基于所述激光器的中心波长漂移量确定光学滤波片的带宽。
  4. 根据权利要求3所述的方法,其特征在于,所述基于所述激光器的当前工作温度确定所述激光器的当前中心波长,包括:
    基于所述激光器的标称温度和所述激光器的当前工作温度确定第三温差;
    基于所述第三温差和所述激光器的中心波长温度变化率,确定所述中心波长的漂移量;
    基于所述中心波长和所述中心波长的漂移量,确定所述激光器的当前中心波长。
  5. 根据权利要求1所述的方法,其特征在于,所述获取所述激光器的当前工作温度,包括:按照预设时间间隔获取所述激光器的当前工作温度。
  6. 根据权利要求1所述的方法,其特征在于,所述方法还包括:在所述激光器的当前工作温度大于所述预设工作温度范围的最大临界值的情况下,冷却所述激光器直到所述激光器的当前工作温度至少达到所述预设工作温度范围的最大临界值,以使所述激光器的当前中心波长不大于所述光学滤波片的带宽的最大临界值。
  7. 根据权利要求6所述的方法,其特征在于,所述方法还包括:在所述激光器的当前工作温度小于所述预设工作温度范围的最大临界值的情况下,停止对所述激光器进行冷却。
  8. 一种提高激光测距能力的装置,其特征在于,所述雷达系统包括用于发射激光的激光器和用于接收回波光的光学滤波片,所述装置包括:
    获取模块,用于获取所述激光器的预设工作温度范围、所述激光器的中心波长温度变化率、以及所述激光器的当前工作温度;
    建立模块,用于基于所述激光器的预设工作温度范围和所述激光器的中心 波长温度变化率,确定所述光学滤波片的带宽,并基于所述光学滤波片的带宽建立所述雷达系统;
    确定模块,用于基于所述激光器的当前工作温度确定所述激光器的当前中心波长;
    加热模块,用于在所述激光器的当前工作温度小于所述预设工作温度范围的最小临界值的情况下,加热所述激光器直到所述激光器的当前工作温度至少达到所述预设工作温度范围的最小临界值,以使所述激光器的当前中心波长不小于所述光学滤波片的带宽的最小临界值。
  9. 一种计算机存储介质,其特征在于,所述计算机存储介质存储有多条指令,所述指令适于由处理器加载并执行如权利要求1-7任一项的方法步骤。
  10. 一种电子设备,其特征在于,包括:处理器和存储器;其中,所述存储器存储有计算机程序,所述计算机程序适于由处理器加载并执行如权利要求1-7任一项的方法步骤。
PCT/CN2020/134096 2020-12-04 2020-12-04 提高雷达系统激光测距能力的方法、装置及存储介质 WO2022116213A1 (zh)

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