WO2018171276A1

WO2018171276A1 - Micromirror-based levelling instrument

Info

Publication number: WO2018171276A1
Application number: PCT/CN2017/118380
Authority: WO
Inventors: 张瓯; 丁鼎
Original assignee: 常州华达科捷光电仪器有限公司
Priority date: 2017-03-21
Filing date: 2017-12-25
Publication date: 2018-09-27
Also published as: CN207197514U

Abstract

A micromirror-based levelling instrument comprises: a laser source module for emitting a laser beam; a micromirror optical module for receiving and reflecting the laser beam to a target object, the target object reflecting the laser beam back to the micromirror optical module to form a reflected laser beam; an optical detection module receiving the reflected laser beam and converting the reflected laser beam into an electric signal; a data processing module connected to the optical detection module, the data processing module receiving the electric signal and performing computation to obtain distance data with respect to the target object. In the micromirror-based levelling instrument, a rotation mechanism and an optical path mechanism in a conventional levelling instrument are replaced with a micromirror optical system. The micromirror optical system employs a set of micromirror mechanisms fixed in the same plane to cover a range of 360°. The programmability of the micromirror optical system realizes a function of a conventional laser levelling instrument, and enables the instrument to be operated in an intelligent manner and have a compact size.

Description

Micromirror sweeper

Technical field

The invention relates to a micromirror sweeper in the field of construction.

Background technique

The structure of the existing laser leveling device is to emit laser light from a single light source, form a point to the outside through the pentagonal prism, and then rotate the laser emitting part of the instrument at a high speed by the motor to form a circumferentially shaped laser line on the target wall. The disadvantage of such an instrument is that it is bulky, heavy in weight and energy-consuming due to the inclusion of the motor.

To this end, the present invention proposes a micromirror sweeper that replaces the optical path structure of a conventional leveling device. Due to the intelligent programming of the micromirror, the present invention can satisfy the functions of the conventional laser leveling device, and at the same time make it intelligent and lightweight. Chemical.

Summary of the invention

In order to overcome the above technical drawbacks, it is an object of the present invention to provide a micromirror leveling device which can realize the function of a conventional leveling device. In the production, the cumbersome calibration assembly process of the traditional sweeper can be abandoned, and the development of its intelligence and lightness can be realized.

The invention discloses a micromirror level sweeper, comprising: a laser source module emitting a laser beam; a micromirror optical module receiving the laser beam; the micromirror optical module comprising micro scanning lenses, the micro scanning lenses are in mutual Moving in two perpendicular directions, the laser beam is reflected by the micro-scanning lens to a target object, the target object reflects the laser beam back to the scanning galvanometer module to form a reflected laser; the light detecting module Receiving a reflected laser light of the laser beam and converting the reflected laser light into an electrical signal; and a data processing module connected to the light detecting module, receiving the electrical signal and calculating distance data of the target object.

Preferably, the micromirror optical module is a set of micromirror mechanisms fixed in the same plane.

Preferably, the micromirror optical module comprises at least six micromirror mechanisms.

Preferably, the scanning range of the micromirror mechanism is 60°, and the scanning range of the six micromirror mechanisms covers 360°.

Preferably, each of the micromirror mechanisms comprises an independent light source.

Preferably, the light detecting module and the data processing module are disposed in an embedded unit.

Preferably, the micromirror sweeper further comprises: a laser modulation module for modulating the laser intensity and the emission time of the laser source module.

Preferably, the micromirror sweeper further comprises: a communication module that is in interactive communication with a mobile device.

Preferably, the micromirror sweeper further comprises: a human-computer interaction module, the human-computer interaction module comprising a user interface and a display.

Preferably, the micromirror sweeper further comprises: a power module, the power module being provided by one of a disposable battery pack, a rechargeable battery or an external regulated power supply.

DRAWINGS

1 is a schematic structural view of a system of a micromirror level sweeper in accordance with a preferred embodiment of the present invention;

detailed description

Advantages of the present invention are further explained below in conjunction with the accompanying drawings and specific embodiments.

Referring to Figure 1, in the present invention, the micromirror sweeper includes the following equipment:

Laser source module

As the core equipment of the micromirror sweeper, the laser source module is arranged inside the micromirror sweeper to emit a laser beam outward.

Micromirror optical module

The micromirror optical module includes a micro-scanning lens that moves in two directions perpendicular to each other such that the laser beam is reflected by the micro-scanning lens to a target object, and the target object is The laser beam is reflected back to the scanning galvanometer module to form a reflected laser; the micromirror optical module includes at least six micromirror mechanisms. Since the scanning range of a single micromirror mechanism is 60° and the scanning range of the six micromirror mechanisms covers 360°, a programmable variable image can be projected in a omnidirectional plane. Each micromirror mechanism contains an independent light source.

Light detection module

After the scanning galvanometer module receives the reflected laser light, the reflected laser light is reflected to the light detecting module. After receiving the reflected laser light, the light detecting module converts the reflected laser light into an electrical signal, and further processes the electrical signal. The electrical signal may include the frequency, phase, intensity, etc. of the laser beam emitted by the laser source module, as well as the frequency, phase, intensity, etc. of the reflected laser light.

Data processing module

The device is connected to the light detecting module, receives the electrical signal converted by the light detecting module and the information of the laser beam carried in the electrical signal, and processes the information to calculate the distance data between the target object and the laser source. Specifically, after the electrical signal is transmitted by the light detecting module to the data processing module, the data processing module extracts the information of the laser beam from the electrical signal, and calculates the cause of the phase difference according to the corresponding principle, that is, the target object. Distance data.

In the above embodiment, the photodetection module and the data processing module can be placed in an embedded unit to facilitate programming by the user, and the micromirror sweeper can be handheld.

Preferably or alternatively, the micromirror sweeper further includes a laser modulation module that can select different modulation modes for incorrect measurement requirements. For example, when the measured value is calculated based on the time difference of the laser emission reception, the pulse modulation mode can be selected, and when the measured value is calculated based on the phase difference received by the laser emission, the sinusoidal waveform mode can be selected. Therefore, for different modes of demand, the laser modulation module can adjust the laser beam emitted by the laser source module to be converted into a desired form.

In view of the fact that the micromirror sweeper of the present invention can be hand-held, in order to further facilitate the operation of the user, the micromirror sweeper further includes a communication module or a human-computer interaction module. For communication with the user's smart device, the communication module can communicate with the mobile device, and the mobile device can be installed with application software, and the user can switch to indirectly through the communication module to the drive circuit through operation of the application software. Operation. The human-computer interaction module can provide an operation interface to a user who does not have a mobile device, and includes a user interface and a display, and the user can directly input an instruction in the user interface. It can be understood that even if the user uses the smart device, The micromirror sweeper can be a choice of a separate device with a mobile device or a separate option from a mobile device. The human-computer interaction module can be placed inside the micromirror, or in an external fixed position. This embodiment does not limit the locations of the communication module, the mobile device, and the human-machine interaction module.

In the embodiment, the power supply of the micromirror sweeper can be provided by a power module, which can be a disposable battery pack and manually replaced by a user; or a rechargeable battery, such as a lithium battery, can be powered by an external power source; An external external regulated power supply is optional.

It should be noted that the embodiments of the present invention are preferred embodiments, and are not intended to limit the scope of the present invention. Any one skilled in the art may use the above-disclosed technical contents to change or modify the equivalent embodiments. Any modification or equivalent changes and modifications of the above embodiments in accordance with the technical spirit of the present invention are still within the scope of the technical solutions of the present invention.

Claims

A micromirror sweeper, characterized in that it comprises:

a laser source module that emits a laser beam;

a micromirror optical module, receiving the laser beam;

The micromirror optical module includes a micro-scanning lens that moves in two directions perpendicular to each other such that the laser beam is reflected by a micro-scanning lens to a target object, the target object will be the laser Reflecting the beam back to the scanning galvanometer module to form a reflected laser beam;

a light detecting module that receives the reflected laser light of the laser beam and converts the reflected laser light into an electrical signal;

And a data processing module connected to the light detecting module, receiving the electrical signal and calculating distance data of the target object.
The micromirror leveling apparatus according to claim 1, wherein said micromirror optical module is a set of micromirror mechanisms fixed in the same plane.
A micromirror level sweeper according to claim 1 wherein said micromirror optical module comprises at least six micromirror mechanisms.
A micromirror leveling apparatus according to claim 2, wherein said micromirror mechanism has a scanning range of 60° and said six micromirror mechanisms have a scanning range of 360°.
The micromirror level sweeper of claim 2 wherein each micromirror mechanism comprises an independent light source.
The micromirror level sweeper of claim 1 wherein said light detecting module and data processing module are disposed within an embedded unit.
The micromirror level sweeper according to claim 1, wherein the micromirror level sweeper further comprises: a laser modulation module for modulating the laser intensity and the emission time of the laser source module.
The micromirror level sweeper of claim 1 wherein said micromirror sweeper further comprises: a communication module for interactively communicating with a mobile device.
The micromirror level sweeper according to claim 1, wherein the micromirror level sweeper further comprises: a human-computer interaction module, wherein the human-machine interaction module comprises a user interface and a display.
The micromirror leveling device according to claim 1, wherein the micromirror leveling device further comprises: a power module, the power module being provided by one of a disposable battery pack, a rechargeable battery or an external regulated power supply.