Vehicle-mounted ranging laser radar system

A laser radar and radar system technology, applied in the field of vehicle radar, can solve the problems of high cost of scanning mirror system, restricting the popularization of vehicle ranging laser radar, etc., and achieve the effect of easy installation, small size and lower system cost.

Inactive Publication Date: 2014-08-13
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the high cost of the scanning mirror system,

Method used

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  • Vehicle-mounted ranging laser radar system
  • Vehicle-mounted ranging laser radar system
  • Vehicle-mounted ranging laser radar system

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Example Embodiment

[0018] like Figure 1-4 As shown, the present invention is divided into a transmitting part and a receiving part. The transmitting part includes: a power supply module 1 , a single-chip microcomputer 2 , a transmitting circuit 3 , an transmitting diode 4 , and a diffraction grating 5 . The power module 1 supplies power to the whole system, the single-chip microcomputer 2 sends pulses to the transmitting circuit 3, the transmitting circuit 3 sends high-power narrow pulses to the transmitting diode 4, and the transmitting diode 4 emits laser light. After passing through the diffraction grating 5, it is divided into three beams of light waves, covering the front. three azimuth areas.

[0019] The receiving part includes: a receiving lens 6 , a PIN tube group 7 , a signal processing circuit 8 , a multiplexer 9 , and a timing chip 10 . When the target object 11 is encountered in the area, the partially reflected laser beam is transmitted to the PIN tube group 7 through the receivi...

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Abstract

The invention discloses a vehicle-mounted ranging laser radar system. The vehicle-mounted ranging laser radar system is characterized in that the radar system is divided into a transmitting part and a receiving part; a single-chip microcomputer of the transmitting part sends pulses to a transmitting circuit, the transmitting circuit sends high-power narrow pulses to an emitting diode, the emitting diode emits a laser, the laser is split into three beams of light waves after passing through a diffraction grating, and front areas in three orientations are covered with the three beams of light waves; when the light waves encounter a target object in one area, part of the reflected laser is transmitted to a PIN transistor set through a receiving lens of the receiving part and then transmitted to a multiplexer after passing through a signal processing circuit, a certain channel is opened up by the multiplexer every certain time and allows echo signals in a certain orientation to pass through, and the signals which have passed through the channel are further transmitted to a timing chip. Because the structure is adopted, an existing scanning mirror system is replaced with the multiplexer, and the cost of the system is substantially reduced; the whole system is small in size and convenient to install.

Description

technical field [0001] The invention relates to the field of vehicle radar, in particular to a vehicle ranging laser radar system. Background technique [0002] At present, the laser ranging system widely used in automobiles can be divided into non-imaging laser radar and imaging laser radar. Non-imaging lidar determines distance based on laser beam travel time. Its working principle is: the laser pulse emitted from the high-power narrow-pulse laser is focused into a beam of a certain shape by the emitting objective lens, scanned left and right by the scanning mirror, emitted to the space, and irradiated on the vehicle or other targets in front, and the reflected light passes through The scanning mirror, receiving objective lens and return fiber are introduced into the photodiode in the signal processing device, and the target distance can be obtained by counting the time difference between the start pulse of the laser diode and the receiving pulse of the photodiode by usin...

Claims

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Application Information

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IPC IPC(8): G01S17/93
CPCG01S17/931
Inventor 段山保严伟徐海峰
Owner CHERY AUTOMOBILE CO LTD
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