CN205317160U

CN205317160U - Non -contact curved surface scanning device

Info

Publication number: CN205317160U
Application number: CN201520939179.7U
Authority: CN
Inventors: 方辉
Original assignee: Zhoushan Ocean Research Center of ZJU
Current assignee: Zhoushan Ocean Research Center of ZJU
Priority date: 2015-11-23
Filing date: 2015-11-23
Publication date: 2016-06-15
Anticipated expiration: 2025-11-23

Abstract

The utility model discloses a non -contact curved surface scanning device. The utility model discloses a 1D laser displacement sensor, utilize 2 total reflection prism change laser beams the incident angle and to motion platform's control, realize measuring the 2D on object surface. PC send instruction control action platform and total reflection prism's motion to gather position sigual and laser displacement sensor's displacement signal, through the program manipulation, finally reach the shape face data of whole object. The utility model discloses simple structure, measurement of efficiency is high, can save the cost effectively.

Description

Contactless curved surface scanning device

Technical field

This utility model belongs to optical, mechanical and electronic integration, is specifically related to a kind of novel contactless curved surface scanning device.

Background technology

Measurement of curved surface is particularly significant in the industrial production, is the important evidence of important means and the improvement of production process detecting product quality. Measurement for object curved surface can be divided into contact and contactless two kinds. Contact type measurement is to measure head to be made directly contact measurement with surface of the work, is scanned moving along workpiece shapes. Being presently mainly employing three coordinate machine measurement, it major downside is that and measurand surface is easily caused damage in various degree. Non-cpntact measurement is the developing direction of current measurement of curved surface, wherein, laser triangulation has noncontact, not easily injured surface due to it, and adaptability for materials is wide, simple in construction, measurement scope is big, anti-interference, measure point little, precision is high, can be used for the features such as measurement real-time, measurement of curved surface has the advantage of uniqueness.

At present, application laser triangulation principle march planar survey mainly has 1D laser displacement sensor and 2D laser displacement sensor. 2D laser displacement sensor can directly scan body surface, but price is much more expensive. And 1D laser displacement sensor price is less than 1/10th of 2D laser displacement sensor, precision is higher, possesses the advantage of uniqueness in the middle of industrial applications.

Summary of the invention

This utility model is for the deficiencies in the prior art, it is provided that a kind of contactless curved surface scanning device based on 1D laser displacement sensor.

Technical solution adopted in the utility model:

This utility model includes 1D laser displacement sensor, and described 1D laser displacement sensor is made up of generating laser and laser receiver; The laser beam of laser transmitter projects incides the surface of testee by the first total reflection prism and the second total reflection prism, and the laser beam reflected through the surface of testee is accepted by laser receiver.

The second described total reflection prism is by Serve Motor Control rotational angle, thus adjusting laser beam in incidence point position.

Described testee is put on the moving platform, and the motion of motion platform is by Serve Motor Control.

This utility model simple in construction, measures efficiency high, can be effectively saved cost.

Accompanying drawing explanation

Fig. 1: this utility model structural representation;

Fig. 2 a and Fig. 2 b: work process schematic diagram;

Fig. 3: control and acquisition principle schematic diagram;

In figure: 1-generating laser, 2-laser pickoff, 3-laser beam, 4-total reflection prism, 5-total reflection prism 2,6-servomotor, 7-servomotor, 8-testee, 9-motion platform.

Detailed description of the invention

Below in conjunction with accompanying drawing, principle of the present utility model, structure are described further.

Ultimate principle of the present utility model: by 1D laser displacement sensor, utilizes 2 total reflection prisms to change the incident angle of laser beam and the control to motion platform, it is achieved the 2D of body surface is measured. The motion of PC transmission instruction control motion platform and total reflection prism, and gather the displacement signal of position signalling and laser displacement sensor, by processing, finally draw the shape face data of whole object.

Specific embodiment:

As it is shown in figure 1, laser displacement sensor is made up of generating laser 1 and laser receiver 2. Generating laser 1 is launched laser beam 3 and is mapped to the surface of testee 8 by total reflection prism 4 and total reflection prism 5. 3 glasss of laser receiver 2 of laser beam of reflection accept. Total reflection prism 5 is controlled rotational angle by servomotor 6, and testee 8 is placed on motion platform 9, and the motion of motion platform 9 is controlled by servomotor 7.

As shown in Figure 2 a and 2 b, when servomotor 6 control total reflection prism 5 rotate clockwise certain angle time, the laser beam 3 incidence point on the surface of testee 8 will be moved to the left. When servomotor 6 control total reflection prism 5 rotate counterclockwise certain angle time, the laser beam 3 incidence point on testee surface will move right, thus body one scanning line. Meanwhile, servomotor 7 controls motion platform 9 and moves, and scanning element will form the scanning strip of a piece of 2D.

As it is shown on figure 3, control with signal acquiring system by laser displacement sensor, motion platform, controlling system, signal acquiring system forms. PC sends command signal and controls servomotor thus controlling the motion of motion platform and prism, and meanwhile, the position signalling of motion platform and prism is passed to PC end by coding disk. Displacement signal is directly passed to PC end by laser displacement sensor, thus completing the collection of signal.

Claims

1. contactless curved surface scanning device, including 1D laser displacement sensor, it is characterised in that: described 1D laser displacement sensor is made up of generating laser and laser receiver; The laser beam of laser transmitter projects incides the surface of testee by the first total reflection prism and the second total reflection prism, and the laser beam reflected through the surface of testee is accepted by laser receiver;

The second described total reflection prism is by Serve Motor Control rotational angle, thus adjusting laser beam in incidence point position;