Accumulating short and medium range finding method with pulse laser

A pulsed laser ranging and integral accumulation technology, which is used in measurement devices, radio wave measurement systems, and electromagnetic wave re-radiation, etc. Low cost, large ranging range and good stability

Inactive Publication Date: 2004-04-07
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

The laser pulse ranging method has a certain time interval for each measurement, and it takes a long time for multiple measurements, so the number of measurements or measurement accuracy is limited.
This method is not suitable for short-distance ranging (generally not less than 1 km)

Method used

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  • Accumulating short and medium range finding method with pulse laser
  • Accumulating short and medium range finding method with pulse laser
  • Accumulating short and medium range finding method with pulse laser

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Embodiment Construction

[0026] Integral accumulation pulse laser ranging method is realized according to the following steps:

[0027] Step 1: The modulated pulse is generated by the pulse modulator, one way is sent to the laser driver, the other way is sent to the integration times controller to start counting; the other way is sent to trigger integrator 1 and trigger integrator 2 to start integration;

[0028] Step 2: The laser emitter emits a beam of pulsed laser to the target;

[0029] Step 3: The photodetector receives the pulsed laser light and converts it into a pulsed electric signal, which is amplified and then sent to the shaper for shaping, and then sent to the integrator to stop the integration. The above process is repeated every time a laser pulse is received;

[0030] Step 4: After the above process has accumulated to a certain number of times (generally between 2 and 10 6 times), the integral times controller controls the integration voltage of the acquisition integrator to output t...

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Abstract

The present invention belongs to the field of optoelectronic technology. Pulse modulation method is adopted to expand the measurement range, integral accumulation method is adopted to realize ultrashort pulse measurement and raise measurement precision and antijamming capacity, and multiple-channel integration is adopted to expand distance finding range and to meet the requirement fast and precise ranging in short and medium distance without cooperative target used. The method may be used in the high precision distance measurement of 0.1-100 m in building, traffic, automation and other fields.

Description

technical field [0001] The invention relates to a high-precision, medium-to-short distance integration and accumulation pulse laser ranging method, which belongs to the field of optoelectronic technology. Background technique [0002] In applications such as construction, transportation, automated manufacturing and robotics, it is required to perform high-precision ranging for non-cooperative targets at short and medium distances, ranging from a few tenths of meters to hundreds of meters. Commonly used ranging methods are divided into principles, generally there are "triangulation method" and "time measurement method". The "triangular distance measurement method" changes the distance of the target into the lateral displacement distance of the target image point based on the geometric principle. There must be a certain distance between the transmitting and receiving sides—the baseline. The ranging accuracy is proportional to the length of the baseline. When measuring a long-d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/10
Inventor 郝群朱秋东黄强
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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