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A distance measurement method and system based on laser pulse waveform frontier detection

A technology of laser pulse and ranging method, which is used in radio wave measurement systems, electromagnetic wave re-radiation, measurement devices, etc. Secondary echo ranging accuracy, achieving the effect of contour scanning

Active Publication Date: 2018-04-13
BEIJING WATCH DATA SYST
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  • Description
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  • Application Information

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Problems solved by technology

However, due to the large dynamic range of echo energy, it is necessary to use a self-gain control amplifier to ensure the consistency of the detection waveform
However, the self-gain control amplifier needs a certain tracking time, so it is not suitable for dynamic scanning applications based on single-echo ranging, because the echo energy changes quickly, and the self-gain amplifier cannot keep up

Method used

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  • A distance measurement method and system based on laser pulse waveform frontier detection
  • A distance measurement method and system based on laser pulse waveform frontier detection
  • A distance measurement method and system based on laser pulse waveform frontier detection

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Embodiment Construction

[0052]The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0053] The invention is suitable for detecting the front edge of the laser pulse waveform and calculating the distance by using the time difference of the pulse waveform front edge between the reference wave and the echo.

[0054] Such as figure 1 As shown, a ranging method based on the detection of the leading edge of the laser pulse waveform includes the following steps:

[0055] (1) Using high-speed ADC to sample the reference wave and echo of the pulse signal;

[0056] (2) Convert the analog waveform into a digital waveform signal;

[0057] (3) Digital signal processing is used to calculate the echo time delay, so as to calculate the distance.

[0058] In step (1), the sampling rate of the ADC is more than 7 times greater than the bandwidth of the pulse signal, and the sampling data bit width is more than 7 bits.

[0059] In the step (3), the e...

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Abstract

The invention relates to a range finding method based on laser pulse shape leading edge detection and a system thereof and belongs to the laser pulse range finding technology field. In the invention, a high speed ADC is used to sample a reference wave and an echo of a pulse signal. A simulation waveform is converted into a digital waveform signal. And then a digital signal processing mode is used to carry out echo time delay calculating so that a distance is calculated. When a laser pulse range finding mode is used to carry out object outline scanning and during a high-speed dynamic scanning process, monopulse echo range finding precision is increased and high-precision outline scanning is realized.

Description

technical field [0001] The invention belongs to the technical field of laser pulse distance measurement, and in particular relates to a distance measurement method and system based on detection of the front edge of laser pulse waveform. Background technique [0002] Laser distance measuring (laser distance measuring) uses a laser as a light source for distance measurement. According to the way the laser works, it is divided into continuous laser and pulsed laser. Gas lasers such as helium-neon, argon ions, and krypton-cadmium work in a continuous output state and are used for phase laser ranging; double heterogeneous gallium arsenide semiconductor lasers are used for infrared ranging; solid-state lasers such as ruby ​​and neodymium glass are used for Pulsed laser ranging. Laser pulse ranging technology has a very wide range of applications, such as ranging applications, object contour scanning applications and so on. Compared with photoelectric ranging, laser ranging can ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S17/10
CPCG01S17/10
Inventor 吴限
Owner BEIJING WATCH DATA SYST
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