CN111208488A

CN111208488A - Laser range finder

Info

Publication number: CN111208488A
Application number: CN201911418346.2A
Authority: CN
Inventors: 徐凡
Original assignee: Xian Difan Heying Technology Development Co Ltd
Current assignee: Xian Difan Heying Technology Development Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-05-29

Abstract

According to the laser range finder provided by the embodiment of the invention, when the distance of an object with a three-dimensional structure is measured, a second rotating mechanism is used for rotating and adjusting, a first laser emitter and a second laser emitter are rotated to the same direction, a first rotating mechanism is adjusted, the direction of the first laser emitter arranged on a first bearing part is rotated to the position facing the top end of the three-dimensional structure, a third rotating mechanism is adjusted, and the direction of the second laser emitter arranged on a fourth bearing part is rotated to the position facing the bottom of the three-dimensional structure; the three-dimensional structure can be measured at the moment, the distance from the current place to the top end of the target three-dimensional structure and the distance from the current place to the bottom of the target three-dimensional structure can be measured simultaneously, and the method is simple to operate, convenient and fast.

Description

Laser range finder

Technical Field

The invention relates to the technical field of laser measurement, in particular to a laser range finder.

Background

The laser ranging utilizes the characteristics of good monochromaticity and coherence, strong directivity and the like of laser to realize high-precision length measurement and detection.

Laser ranging can be divided into phase type and pulse type laser ranging instruments in principle, and the phase method is to transmit a string of sine waves, receive reflected echo signals and calculate the phase difference between the transmitted signals and the received signals so as to obtain the transmission delay of the signals in a medium. The method has high calculation accuracy and is widely applied to geodetic surveying and building industries.

The existing laser range finder is generally a one-way range finder, but also has a two-way range finder, and the two-way range finder can be positioned at the middle electric position of a road section to be detected, measure one end of the road section respectively, measure the other end of the road section, add the distances of the two ends to obtain the distance of the road section, but the existing two-way range finder can only measure the distance between each angle belonging to the same plane, and is inconvenient to use when the measurement has a three-dimensional structure.

Disclosure of Invention

The embodiment of the invention aims to provide a laser range finder for simply and quickly measuring the distance of an object with a three-dimensional structure. The specific technical scheme is as follows:

the embodiment of the invention provides a laser range finder, which comprises: the laser positioning device comprises a first laser transmitter, a second laser transmitter, a first laser receiver, a second laser receiver, a first bearing part, a second bearing part, a third bearing part, a fourth bearing part, a first rotating mechanism, a second rotating mechanism and a third rotating mechanism;

the first laser transmitter and the first laser receiver are both fixedly arranged on the first bearing part; the second laser transmitter and the second laser receiver are both fixedly arranged on the fourth bearing part; the first bearing part and the second bearing part rotate around the first rotating mechanism; the second bearing part and the third bearing part rotate around the second rotating mechanism; the third bearing part and the fourth bearing part rotate around the third rotating mechanism;

the rotation axis of the first rotating mechanism is parallel to the axis of the third rotating shaft, and the rotation axis of the first rotating mechanism is perpendicular to the rotation axis of the second rotating mechanism.

Optionally, the system further comprises a first angle sensor, a second angle sensor and a third angle sensor;

the first angle sensor is arranged in the first rotating mechanism and used for measuring an included angle between the first bearing part and the second bearing part by taking the first rotating mechanism as a vertex;

the second angle sensor is arranged in the second rotating mechanism and used for measuring an included angle between the second bearing part and the third bearing part by taking the second rotating mechanism as a vertex;

the third angle sensor is arranged in the third rotating mechanism and used for measuring an included angle between the third bearing part and the fourth bearing part with the third rotating mechanism as a vertex.

Optionally, the laser range finder further comprises a power module, and the power module is used for providing power for the whole laser range finder.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

Fig. 1 is a schematic structural diagram of a laser range finder provided in an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a first laser transmitter and a first laser receiver according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention.

In order to simply and quickly measure the distance of an object with a three-dimensional structure, the embodiment of the invention provides a laser range finder.

It should be noted that the laser range finder provided by the embodiment of the present invention can be applied to the technical field of artificial intelligence distance measurement.

Referring to fig. 1 and fig. 2, an embodiment of the present invention provides a laser range finder, including: the laser positioning device comprises a first laser transmitter 1, a first laser receiver 3, a second laser receiver 4, a first bearing part 5, a second bearing part 6, a third bearing part 7, a fourth bearing part 8, a first rotating mechanism 9, a second rotating mechanism 10 and a third rotating mechanism 11;

the first laser transmitter 1 and the first laser receiver 3 are both fixedly arranged on the first bearing part 5; the second laser transmitter 2 and the second laser receiver 4 are both fixedly arranged on the fourth bearing part 8; the first bearing part 5 and the second bearing part 6 rotate around the first rotating mechanism 9; the second bearing part 6 and the third bearing part 7 rotate around the second rotating mechanism 10; the third bearing part 7 and the fourth bearing part 8 rotate around the third rotating mechanism 11;

the rotation axis of the first rotation mechanism 9 is parallel to the axis of the third rotation shaft, and the rotation axis of the first rotation mechanism 9 is perpendicular to the rotation axis of the second rotation mechanism 10.

Specifically, the first laser receiver 3 and the first laser emitter 1 are arranged side by side, and the first laser receiver 3 and the first laser emitter 1 face in the same direction and are in the same direction as the axis of the first bearing part 5; the second laser receiver 4 and the second laser emitter 2 are arranged side by side, and the orientation of the second laser receiver 4 and the orientation of the second laser emitter 2 are consistent and are in the same direction with the axis of the fourth bearing part 8.

During specific distance measurement, the first laser transmitter 1 and the second laser transmitter 2 respectively emit laser outwards, the first laser receiver 3 receives the laser reflected by the laser emitted by the first laser transmitter 1, the second laser receiver 4 receives the laser reflected by the laser emitted by the second laser transmitter 2, and then the time difference or the wavelength phase difference of laser advancing is calculated respectively, so that the distance measured by the first bearing part 5 and the distance measured by the second bearing part 6 are calculated.

In the laser range finder provided by the embodiment of the invention, when measuring the distance to an object with a three-dimensional structure, the second rotating mechanism 10 is used for rotating and adjusting, the first laser emitter 1 and the second laser emitter 2 are rotated to the same direction, the first rotating mechanism 9 is adjusted, the first laser emitter 1 arranged on the first bearing part 5 is rotated to the position facing the top end of the three-dimensional structure, the third rotating mechanism 11 is adjusted, and the second laser emitter 2 arranged on the fourth bearing part 8 is rotated to the position facing the bottom of the three-dimensional structure; the three-dimensional structure can be measured at the moment, the distance from the current place to the top end of the target three-dimensional structure and the distance from the current place to the bottom of the target three-dimensional structure can be measured simultaneously, and the method is simple to operate, convenient and fast.

the first angle sensor is arranged in the first rotating mechanism 9 and is used for measuring an included angle between the first bearing part 5 and the second bearing part 6 by taking the first rotating mechanism 9 as a vertex;

the second angle sensor is arranged in the second rotating mechanism 10 and is used for measuring an included angle between the second bearing part 6 and the third bearing part 7 by taking the second rotating mechanism 10 as a vertex;

the third angle sensor is arranged in the third rotating mechanism 11, and the third angle sensor is used for measuring an included angle between the third bearing part 7 and the fourth bearing part 8 with the third rotating mechanism 11 as a vertex, and the angle detection by the angle sensor is the prior art, and the embodiment of the invention does not limit the included angle.

Specifically, in an actual measurement process, for example, the height of a building needs to be measured, the laser range finder provided by the embodiment of the invention is used for measuring the distance, the distance between the position of the laser range finder and the top of the building is obtained by adopting the method for calculating, the distance between the laser range finder and the bottom of the building is obtained, when the height of the building is calculated, an angle is needed, the height of the building can be further calculated by utilizing the sine and cosine theorem, and the first angle sensor, the second angle sensor and the third angle sensor can provide angle values for the calculation, so that the use is more convenient.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims

1. A laser rangefinder, comprising: the laser positioning device comprises a first laser transmitter, a second laser transmitter, a first laser receiver, a second laser receiver, a first bearing part, a second bearing part, a third bearing part, a fourth bearing part, a first rotating mechanism, a second rotating mechanism and a third rotating mechanism;

the rotation axis of the first rotating mechanism is parallel to the axis of the third rotating mechanism, and the rotation axis of the first rotating mechanism is vertical to the rotation axis of the second rotating mechanism.

2. The laser rangefinder of claim 1 further comprising a first angle sensor, a second angle sensor, a third angle sensor;

3. The laser rangefinder of claim 1 further comprising a power module that provides power to the entire laser rangefinder.