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Laser range finder

A laser rangefinder and laser receiving technology, which is applied in the field of laser rangefinders, can solve the problems of reduced distance accuracy and achieve the effect of improving distance measurement accuracy

Pending Publication Date: 2019-06-21
SHENZHEN MAMMOTH ELECTRONIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In practice, the luminous intensity of the laser diode will be affected by the temperature, and the temperature of the two laser diodes is difficult to keep consistent, which eventually leads to a decrease in the accuracy of the distance calculated according to the above distance measurement principle.

Method used

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Examples

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Effect test

no. 1 example

[0042] figure 1 A schematic diagram of the overall structure of the first laser range finder 10 provided in the embodiment of the present application is shown. refer to figure 1 , the laser range finder 10 includes a controller 100, a phase-locked circuit 110, an emission drive circuit 120, a laser diode 122 (i.e. the first emission tube), a light emitting diode 124 (i.e. the second emission tube), a local oscillator processing circuit 130 and a laser receiving device 140 .

[0043] The controller 100 is a unit with computing and processing capabilities. The controller 100 has multiple functional pins externally, which can be connected to other components for signal transmission and to realize corresponding functions. The controller 100 may be implemented by, but not limited to, a single-chip microcomputer (Micro Controller Unit, MCU), such as an STM32 series single-chip microcomputer. It can be understood that during specific implementation, the controller 100 used should ...

no. 2 example

[0071] Figure 5 A schematic diagram of the overall structure of the second laser rangefinder 20 provided in the embodiment of the present application is shown. refer to Figure 5 , the laser rangefinder 20 includes a controller 100, a phase-locked circuit 110, an emission drive circuit 120, a first light-emitting diode 123 (i.e. the first emission tube), a second light-emitting diode 125 (i.e. the second emission tube), a local oscillator processing The circuit 130 and the laser receiving device 140.

[0072] The phase-locking circuit 110 is respectively connected to the clock pin of the controller 100, the emission driving circuit 120 and the local oscillator processing circuit 130, for outputting the synchronous clock signal to the controller 100, and outputting the driving clock signal to the emission driving circuit 120 , and output the local oscillator clock signal to the local oscillator processing circuit 130;

[0073] The emission driving circuit 120 is also connec...

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Abstract

The application relates to the technical field of range finding, and provides a laser range finder. A phase-locked circuit in the range finder is connected with the clock pin of a controller, a transmitting driving circuit and a local oscillator processing circuit and is used for providing a clock signal. The transmitting driving circuit is also connected with a first transmitting tube and a second transmitting tube, and is used for driving the first transmitting tube to transmit an external optical path signal, and driving the second transmitting tube to transmit an internal optical path signal. The local oscillator processing circuit is further connected with a laser receiving device and is used for outputting a local oscillation signal to the laser receiving device. The laser receivingdevice is connected to the first analog-to-digital conversion pin of the controller, and is used for mixing the internal optical path signal with the local oscillation signal, outputting a mixed signal to the controller, mixing the external optical path signal reflected by a measured object with the local oscillation signal, and outputting a mixed signal to the controller to enable the controllerto calculate the distance to be measured. The light-emitting intensity of a light-emitting diode used in the second transmitting tube is less affected by temperature so as to improve the range findingaccuracy.

Description

technical field [0001] The present application relates to the technical field of ranging, and in particular, to a laser ranging instrument. Background technique [0002] A laser range finder is a device that uses laser light to measure the distance of a target. The current laser range finder generally uses laser phase ranging, which is mainly divided into four methods according to the optical path it measures: single transmission and single reception, single transmission and double reception, double transmission and single reception, and double transmission and double reception. [0003] Among them, the method of double transmission and single reception usually uses two laser diodes to emit laser signals, one of which is the signal of the outer optical path, and the other is the signal of the inner optical path. The outer optical path signal is reflected by the measured object and is received by the laser receiving device. In the laser range finder, after being transmitted ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/48
Inventor 王振兴张新文
Owner SHENZHEN MAMMOTH ELECTRONIC CO LTD
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