CN209961222U - Contact type linear array camera and detection system - Google Patents

Abstract

The utility model relates to a light detects's technical field discloses contact linear array camera and detecting system for acquire the image information who detects the target, contact linear array camera include linear arrangement's photosensitive element array and cylindricality lens array with between the detection target, still be equipped with the edge the light source structure that cylindricality lens array extends the setting. The utility model provides a traditional optical lens and light source have been saved to contact linear array camera and detecting system, and more traditional linear array camera system has the advantage in the cost, has brought very big convenience for the installation and debugging, does not have traditional optical lens's geometric distortion, and the coordinate of scanning line is provided by the grating, guarantees the scanning precision.

Description

Contact type linear array camera and detection system

Technical Field

The utility model relates to a light detection's technical field especially relates to contact linear array camera.

Background

The conventional linear array camera detection system on the market is a traditional CCD/CMOS (charge coupled device/complementary metal oxide semiconductor) mode with an optical lens and a light source, and has several major disadvantages in application:

1) the traditional line scanning detection system has higher requirement on installation space due to the need of installing a lens and a light source;

2) the traditional matched linear array light source has large power consumption and fast attenuation;

3) the traditional optical lens cannot avoid lens distortion, and is difficult to restore the detected object with high quality;

4) the traditional linear array camera adopts an encoder to trigger outside to take a picture, and the encoder possibly loses pulses in the high-speed operation process, so that the camera cannot stably take pictures;

5) the traditional linear array detection system consists of a linear array camera, a lens, a light source and the like, and the hardware cost is high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a contact linear array camera and detecting system aims at solving among the prior art optical lens installation and debugging complicacy, camera lens distortion, low, the high scheduling problem of cost.

The utility model discloses a realize like this, provide contact linear array camera for acquire the image information who detects the target, including linear arrangement's photosensitive element array and cylindricality lens array with between the detection target, still be equipped with the edge the cylindricality lens array extends the light source structure that sets up.

Further, the light source structure is an obliquely arranged LED light source.

Further, the light source structure comprises a light guide strip.

Further, the light source structure also comprises a pulse light source arranged on one side of the light guide belt.

Further, the device also comprises a signal amplifying circuit

The utility model also provides a detecting system, including motion control platform and foretell contact linear array camera that is used for carrying the detection objective.

Further, the motion control platform comprises:

and the motion control line is used for controlling the conveying speed of the detection target and outputting a line trigger acquisition signal to the contact linear array camera to enable the detection speed of the contact linear array camera to be synchronous with the conveying speed of the detection target.

And further, the system also comprises an upper computer which is used for receiving the detection data, splicing the images and correcting the images.

The utility model provides a traditional optical lens and light source have been saved to contact linear array camera and detecting system, and more traditional linear array camera system has the advantage in the cost, has brought very big convenience for the installation and debugging, does not have traditional optical lens's geometric distortion, and the coordinate of scanning line is provided by the grating, guarantees the scanning precision.

Drawings

Fig. 1 is a schematic structural diagram of a contact line camera provided in an embodiment of the present invention;

fig. 2 is a schematic view of a lateral structure of a contact line camera according to an embodiment of the present invention;

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The implementation of the present embodiment is described in detail below with reference to specific drawings.

As shown in fig. 1 and 2, the present embodiment provides a contact line camera for acquiring image information of an inspection target 4, which includes a linear array of photosensitive elements 1 and a cylindrical lens array 2, and it is easily understood that the photosensitive element array 1 is an array formed by a plurality of photosensitive elements, and the cylindrical lens array 2 is an array formed by a plurality of cylindrical lenses. Between the cylindrical lens array 2 and the detection target 4, a light source structure 3 is provided, which extends along the cylindrical lens array 2.

In the detection process, the light source structure 3 emits light to irradiate the detection target 4, the light enters the corresponding photosensitive elements through the cylindrical lenses after being reflected, the photosensitive element array 1 converts optical signals into electric signals, and the electric signals are processed by the upper computer to generate corresponding image information.

Compared with the prior art, the contact type linear array camera has the following characteristics:

1) the system has better integral integration, saves a lens and a light source in the traditional imaging mode, greatly improves the portability of the system and brings great convenience to installation and debugging;

2) the cylindrical lens is adopted to realize the imaging of the object and the photosensitive element 1:1, and the geometric distortion of the traditional optical lens is avoided;

3) the coordinates of the scanning lines are provided by the grating, so that the scanning precision is ensured;

4) and the system has advantages in cost compared with the traditional linear array camera system because a lens and a light source are omitted.

Preferably, the contact linear array camera further comprises a signal amplification circuit, which is used for amplifying the electric signal of the photosensitive element array 1, so as to facilitate processing by an upper computer.

Preferably, the light source structure 3 in this embodiment is an obliquely arranged LED light source 3, and the integrated LED light source 3 can effectively control the power consumption of the device, so that the service life is longer. In other embodiments, other light sources may be used, such as fluorescent lights.

Specifically, the light source structure 3 includes a light guiding strip 31, which has a strip shape and can emit light corresponding to the shape of the cylindrical lens array 2, so as to scan the detection target 4. Furthermore, the light source structure 3 further includes a pulse light source 32 disposed on one side of the light guiding strip 31, and the pulse light source 32 can emit a pulse light with a specific color to satisfy the scanning requirement of the detected target 4.

The embodiment also provides a detection system, which comprises a motion control platform for conveying the detection target 4 and the contact type linear array camera. The contact linear array camera is matched with the motion control platform to scan the detection target 4, and the method has the characteristics of convenience in installation and debugging, low cost, high scanning progress and the like.

Preferably, the motion control platform comprises a motion control line for controlling the conveying speed of the detection target 4 and outputting a line trigger acquisition signal to the contact linear array camera to synchronize the detection speed with the conveying speed of the detection target 4.

The detection system also comprises an upper computer, universal image acquisition DEMO software is required to be installed, and the upper computer is responsible for acquiring and processing image data and is used for receiving detection data, performing image software flat field correction, image mirror processing and automatic splicing on the image.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (5)

1. The contact type linear array camera is used for acquiring image information of a detection target and is characterized by comprising a photosensitive element array and a cylindrical lens array which are linearly arranged, wherein a light source structure which is arranged along the cylindrical lens array in an extending manner is further arranged between the cylindrical lens array and the detection target, the light source structure is an LED light source which is obliquely arranged, the light source structure comprises a light guide belt, and the light source structure further comprises a pulse light source which is arranged on one side of the light guide belt.

2. The contact line camera of claim 1, further comprising a signal amplification circuit.

3. Inspection system, characterized in that it comprises a motion control platform for transporting an inspection object and a contact line camera according to claim 1 or 2.

4. The detection system of claim 3, wherein the motion control platform comprises:

and the motion control line is used for controlling the conveying speed of the detection target and outputting a line trigger acquisition signal to the contact linear array camera to enable the detection speed of the contact linear array camera to be synchronous with the conveying speed of the detection target.

5. The inspection system of claim 3, further comprising a host computer for receiving inspection data and stitching the images to correct the images.

Images