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Laser ranging device and method

A technology of laser distance measurement and laser beam, which is applied in the field of barcode recognition, can solve the problems of high cost, large volume, complex instrument structure, etc., and achieve the effect of high precision and low cost

Active Publication Date: 2014-02-05
FUJIAN NEWLAND AUTO ID TECH CO LTD
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  • Application Information

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Problems solved by technology

[0003] However, the pulse method is generally only suitable for long-distance distance measurement, while barcode scanning is mostly for short distances. The pulse method will not be able to accurately calculate the distance at short distances because the reflection time is too short.
Although the phase distance measurement is suitable for short-distance high-precision measurement, the instrument has a complex structure, high cost, and large volume, and is not suitable for use with barcode scanning engines.

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  • Laser ranging device and method

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Embodiment Construction

[0023] The present invention will be described in detail below in conjunction with specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, method, or functional changes made by those skilled in the art according to these embodiments are included in the protection scope of the present invention.

[0024] Such as figure 1 Shown, an embodiment of the present invention. The laser distance measuring device includes a laser emitting unit A, a photosensitive element 10 and a light entrance hole D. The laser emitting unit A and the photosensitive element 10 are arranged side by side together, the laser emitting unit A is arranged on one side of the photosensitive element 10, the photosensitive element 10 preferably adopts a linear CCD, the laser emitted by the laser emitting unit A is perpendicular to the photosensitive element 10, and A first image B is formed on the target object. In order to ensu...

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Abstract

The invention provides a laser ranging device which comprises a light-sensing element, a light inlet hole formed above the light-sensing element and a laser emission unit arranged on one side of the light-sensing element, wherein the laser emission unit is used for emitting laser beams perpendicular to the light-sensing element. The laser ranging device can guarantee quick measurement and identification, high precision and low cost.

Description

technical field [0001] The invention relates to the field of barcode identification, in particular to a laser distance measuring device and method. Background technique [0002] The current ranging method generally adopts emitting laser for ranging, and laser ranging generally uses two methods to measure distance: pulse method and phase method. The process of pulse method ranging is that the laser emitted by the distance measuring device is reflected by the measured object and then received by the distance measuring device, and the distance measuring device records the time of the laser back and forth at the same time. Half of the product of the speed of light and the round trip time is the distance between the distance measuring device and the measured object. Phase distance measurement is to use the frequency of the radio band to modulate the amplitude of the laser beam and measure the phase delay caused by the modulated light going back and forth to the measured object o...

Claims

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Application Information

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IPC IPC(8): G01C3/26
CPCG01C3/26
Inventor 刘荣生刘继军施晓迪
Owner FUJIAN NEWLAND AUTO ID TECH CO LTD