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Laser phase ranging system and method based on FPGA

A phase ranging and laser technology, applied in the field of laser detection, can solve the problems of insufficient measurement accuracy, high production cost, low output rate, etc., and achieve the effects of high effective power and illumination, light weight and small volume

Pending Publication Date: 2020-07-31
陕西高速星展科技有限公司
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Problems solved by technology

[0004] At present, the output rate of the equipment in the non-contact solution for related distance measurement is low, time-consuming and labor-intensive, the production cost is high, and the measurement accuracy seriously fails to meet the requirements, and it cannot be used under certain lighting conditions, etc.

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  • Laser phase ranging system and method based on FPGA
  • Laser phase ranging system and method based on FPGA
  • Laser phase ranging system and method based on FPGA

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Embodiment Construction

[0031] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and fully convey the concept of example embodiments to those skilled in the art. The described features or characteristics may be combined in any suitable manner in one or more embodiments.

[0032] The invention is based on FPGA (Field Programmable Gate Array) laser phase ranging system, and FPGA (Field Programmable Gate Array) is a product further developed on the basis of PAL, GAL, CPLD and other programmable devices. It emerged as a semi-custom circuit in the field of application-specific integrated circuits (ASIC), which not only solves the shortcomings of custom circuits, but also overcomes the shortcomings of the limited number of original prog...

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Abstract

The invention provides a laser phase ranging system and method based on an FPGA. The system is characterized in that a signal system control processing unit controls a phase digital frequency synthesis source to generate and output signals of two frequencies at the same time, wherein one signal is used as a ranging signal, the ranging signal passes through a first low-pass filter and then is sentto a laser modulation circuit to modulate emitted laser, and the generated laser is reflected back by a measured target, captured and amplified by a laser receiving circuit and then enters a second mixer; and the other signal is used as a reference signal, the signal conditioning circuit completes data acquisition of a ranging signal, and the ranging signal is sent to a signal system control processing unit through an A / D conversion circuit for calculation to realize high-precision ranging. The system is advantaged in that laser ranging efficiency is high, precision is high, a use value is high, and a false alarm rate is low; design is carried out based on phase method frequency mixing, and low-cost rapid distance measurement in a hundred-meter range can be realized; error caused by inaccurate atmospheric refractive index is avoided by correcting, developing and correcting the system.

Description

technical field [0001] The invention belongs to the field of laser detection, and in particular relates to an FPGA-based laser phase ranging system and method. Background technique [0002] Laser is widely used in the detection field, and its impact on social production and life is also very obvious. Laser ranging is one of the earliest applications of laser, because laser has many advantages such as strong directionality, high brightness, and good monochromaticity. The basic principle of using laser transit time to measure distance is to determine the target distance by measuring the time required for the laser to travel back and forth to the target. Although the principle and structure of laser ranging are simple in the market, they were mainly used in civilian applications in the past, but they are rarely seen in industrial automation because the price of laser ranging sensors is too high. [0003] The laser ranging scheme currently used in the market is the traditional...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/36G01S17/32
CPCG01S17/36
Inventor 刘波邵永军王小雄杨超张鑫马红军单勇
Owner 陕西高速星展科技有限公司
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