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TDC laser ranging method based on FPGA

A technology of laser distance measurement and laser transmitter, which is applied in the direction of measuring devices, electromagnetic wave re-radiation, radio wave measurement systems, etc., can solve problems such as complex control interfaces, improve measurement accuracy, enhance data stability, and achieve follow-up results Effect of treatment

Active Publication Date: 2017-05-31
无锡长元新能源电动车科技发展有限公司
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Problems solved by technology

However, the use of general-purpose TDC chips to achieve time difference measurement also has the disadvantages of complex control interfaces, and the need to cooperate with microcontroller or FPGA logic to realize the configuration of the chip and the readout of measurement results.

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  • TDC laser ranging method based on FPGA
  • TDC laser ranging method based on FPGA
  • TDC laser ranging method based on FPGA

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Embodiment Construction

[0022] It is easy to understand that, according to the technical solution of the present invention, without changing the essence of the present invention, those skilled in the art can imagine various implementations of the FPGA-based TDC laser ranging method of the present invention. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the entirety of the present invention or as a limitation or limitation on the technical solution of the present invention.

[0023] In the present invention, the TDC-based pulse time-of-flight measurement, that is, the measurement of the time difference between the start signal and the cut-off signal, is jointly completed by FPGA and TDC. TDC is used to accurately calculate the time difference between the received start signal and cut-off signal; FPGA is used to provide the pulse signal emitted by the laser, and is also used to ...

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Abstract

The invention provides a TDC laser ranging method based on an FPGA. The FPGA and a TDC are used to complete work together. The TDC is used for calculating a time difference between a beginning signal and a cut-off signal. The FPGA is used for providing a pulse signal and converting a TDC time difference into distance information. The pulse signal is used for driving a laser emitter and the beginning signal which is used to trigger the TDC to carry out time difference measurement. The TDC is a TDC-GP2. By using the method of the invention, measurement precision is increased, data stability is enhanced and distance information can be acquired in real time.

Description

technical field [0001] The invention belongs to the technical field of laser or infrared pulse distance measurement, and in particular relates to an FPGA-based TDC laser distance measurement method, which can be applied to laser radar vehicle intelligent collision avoidance, remote sensing imaging and the like. Background technique [0002] Laser ranging systems calculate the distance by measuring the time between when the laser is emitted and when it returns. in such as figure 1 In the pulsed laser ranging as shown, the time difference measurement has become the most critical factor affecting the entire measurement accuracy. Generally, there are two basic ways to complete the time difference measurement: one is to use a programmable gate array, such as FPGA or CPLD, to program and develop by yourself, and the other is to use a commercialized general-purpose TDC chip. [0003] The advantage of using the programmable gate array to program the time difference measurement is ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/08
Inventor 顾国华唐彦琴周玉蛟杨成章
Owner 无锡长元新能源电动车科技发展有限公司