CN-122017800-A - Laser radar emission control circuit and method

CN122017800ACN 122017800 ACN122017800 ACN 122017800ACN-122017800-A

Abstract

The application provides a laser radar emission control circuit and a method, which belong to the technical field of radars, wherein the radar emission control circuit comprises a first control unit, a laser driving circuit and a second control unit, wherein the first control unit is used for sending digital gating signals and luminous triggering signals to the laser driving circuit, the laser driving circuit comprises a second control unit and a driving unit, the second control unit is used for receiving the digital gating signals and the luminous triggering signals, an output port is determined and gated in response to the digital gating signals, and the luminous triggering signals are provided for the driving unit through the gated output port.

Inventors

LI XUE
WANG PANYI
ZHANG GUOWEI

Assignees

武汉万集光电技术有限公司

Dates

Publication Date: 20260512
Application Date: 20241112

Claims (10)

1. A lidar emission control circuit, comprising: the first control unit is used for generating and transmitting a digital gating signal and a light-emitting trigger signal; the laser driving circuit is used for receiving the digital gating signals and the light-emitting trigger signals, and comprises a second control unit and a driving unit, wherein the second control unit responds to the digital gating signals to determine and gate the output ports, and the light-emitting trigger signals are provided for the driving unit through the gated output ports.
2. The lidar transmission control circuit of claim 1, wherein the second control unit comprises a strobe recognition module and a light emission synchronization processing module, wherein, The gating identification module is used for receiving and identifying the digital gating signals and transmitting the identified digital gating signals to the luminous synchronous processing module; The luminous synchronous processing module is used for determining an output port needing gating in the second control unit according to the identified digital gating signal, communicating the output end of the luminous synchronous processing module with the determined output port needing gating, receiving and identifying the luminous triggering signal, and transmitting the identified luminous triggering signal to the output port needing gating in the second control unit.
3. The lidar emission control circuit of claim 1, wherein the driving unit comprises a plurality of driving branches, the driving branches are connected with the output end of the second control unit in a one-to-one correspondence manner, and the driving branches are used for receiving and generating driving pulse signals according to the light-emitting trigger signals.
4. The lidar emission control circuit of claim 3, further comprising a light-emitting unit; The light-emitting unit comprises a plurality of light-emitting circuits, wherein the light-emitting circuits are connected with the driving circuits in a one-to-one correspondence manner, and are used for receiving the driving pulse signals and emitting light according to the driving pulse signals.
5. The lidar transmission control circuit of claim 1, wherein the digital strobe signal and the light-emitting trigger signal are any one of LVDS, CAN, SPI, IIC signals.
6. The lidar transmission control circuit of claim 2, wherein the first control unit and the second control unit are field programmable gate arrays or complex programmable logic devices.
7. The lidar emission control circuit according to any of claims 1 to 4, wherein the digital strobe signal and the light-emitting trigger signal are transmitted separately or the digital strobe signal and the light-emitting trigger signal share a set of signal lines.
8. The lidar transmission control circuit according to claim 7, wherein an and gate is provided in the laser driving circuit in a case where the digital strobe signal and the light emission trigger signal share a set of signal lines, the second control unit supplies a high level signal to one input terminal of the and gate according to the recognized digital strobe signal, the other input terminal of the and gate receives the light emission trigger signal supplied from the first control unit, and when the light emission trigger signal is high level, the and gate outputs the light emission trigger signal to the second control unit so that the light emission trigger signal is supplied to the driving light emitting unit through the output port of the strobe.
9. The lidar transmission control circuit of claim 8, wherein the and gate is built out of the second control unit or is provided in the second control unit using a discrete device.
10. A lidar emission control method implemented by using the lidar emission control circuit according to any of claims 1 to 9, comprising: generating and transmitting a digital gating signal to a laser driving circuit through a first control unit; A second control unit in the laser driving circuit determines and gates an output port in response to the digital gate signal; Generating a light-emitting trigger signal through the first control unit and sending the light-emitting trigger signal to the laser driving circuit; The second control unit in the laser driving circuit supplies the light emission trigger signal to the driving unit through a gated output port.

Description

Laser radar emission control circuit and method Technical Field The application belongs to the technical field of radars, and particularly relates to a laser radar emission control circuit and method. Background The traditional high-beam laser radar transmitting circuit generally has two design ideas, one is a one-to-one control mode, namely, one light emitting unit corresponds to one FPGA (Field Programmable GATE ARRAY ) pin, so that consumed FPGA resources are huge, and if 128 lines, 192 lines and the like of a main-stream high-beam radar, the light emitting control occupies the same number of IO pins, which is obviously unacceptable. The other is to adopt the idea of multiplexing, for example, the number of occupied FPGA pins can be greatly reduced by using the 8-1-select and 16-select 1 multiplexers, but the control of the light emitting units is fixed and inflexible, and the light emitting units cannot be flexibly adjusted. Disclosure of Invention In order to solve the defects in the prior art, the application provides a laser radar emission control circuit and a laser radar emission control method. In a first aspect, the present application proposes a lidar emission control circuit comprising: The first control unit is used for generating a digital gating signal and a light-emitting trigger signal and sending the digital gating signal and the light-emitting trigger signal to the laser driving circuit; the laser driving circuit is used for receiving the digital gating signals and the light-emitting trigger signals, and comprises a second control unit and a driving unit, wherein the second control unit responds to the digital gating signals to determine and gate the output ports, and the light-emitting trigger signals are provided for the driving unit through the gated output ports. Optionally, the second control unit comprises a gating identification module and a light emitting synchronous processing module, wherein, The gating identification module is used for receiving and identifying the digital gating signals and transmitting the identified digital gating signals to the luminous synchronous processing module; The luminous synchronous processing module is used for determining an output port needing gating in the second control unit according to the identified digital gating signal, communicating the output end of the luminous synchronous processing module with the determined output port needing gating, receiving and identifying the luminous triggering signal, and transmitting the identified luminous triggering signal to the output port needing gating in the second control unit. Optionally, the driving unit includes a plurality of driving branches, where the driving branches are connected with the output ends of the second control unit in a one-to-one correspondence manner, and the driving branches are used to receive and generate driving pulse signals according to the light-emitting trigger signals. Optionally, the LED display device further comprises a light emitting unit, wherein the light emitting unit comprises a plurality of light emitting circuits, and the light emitting circuits are connected with the driving circuits in a one-to-one correspondence manner and are used for receiving the driving pulse signals and emitting light according to the driving pulse signals. Optionally, the digital strobe signal and the light-emitting trigger signal are any one of LVDS, CAN, SPI, IIC signals. Optionally, the first control unit and the second control unit are field programmable gate arrays or complex programmable logic devices. Alternatively, the digital strobe signal is transmitted separately from the light emission trigger signal or the digital strobe signal and the light emission trigger signal share a set of signal lines. Optionally, under the condition that the digital gating signal and the light-emitting triggering signal share a group of signal lines for transmission, an AND gate is arranged in the laser driving circuit, the second control unit provides a high-level signal to one input end of the AND gate according to the identified digital gating signal, the other input end of the AND gate receives the light-emitting triggering signal provided by the first control unit, and when the light-emitting triggering signal is at the high level, the AND gate outputs the light-emitting triggering signal to the second control unit so that the light-emitting triggering signal is provided for the driving light-emitting unit through the gated output port. Optionally, the and gate is built outside the second control unit or is arranged inside the second control unit by adopting a discrete device. In a second aspect, a laser radar emission control method is provided, where the method is implemented by using the laser radar emission control circuit in the first aspect, and the method includes: Transmitting a digital gating signal to a laser driving circuit through a first control unit; the second control unit in