CN216385477U - Detection device - Google Patents

Abstract

The application provides a detection device, including support, transfer unit, acquisition unit and irradiation unit. The conveying unit is connected to one side of the support in a sliding mode and used for conveying a measured object. The acquisition unit is fixedly connected with the support and is arranged towards the transmission unit. The illumination unit comprises a first illumination part and a second illumination part, the first illumination part and the second illumination part are symmetrically arranged on two sides of the acquisition unit, light rays emitted by the first illumination part and light rays emitted by the second illumination part are mutually overlapped on a measured object, and the acquisition unit is used for acquiring light rays reflected by the measured object. This application detection device adopts the mode of both sides illumination to polish the measured object, has eliminated the influence that the reflected light probably caused to the acquisition unit formation of image, and then has promoted detection device's precision and efficiency.

Description

Detection device

Technical Field

The application relates to the technical field of detection, in particular to a detection device.

Background

The connector is used as a signal transmission device and widely applied to industries such as consumer electronics, automobiles, industrial equipment and the like. The connector is provided with a plurality of raised pins, the density of the pins is increased along with the development of information technology, and the requirement on the position degree of the pins is increased. The existing detection device mostly adopts an image acquisition mode to detect the position degree of a stitch, but has the defects of insufficient detection precision, low detection efficiency and the like.

SUMMERY OF THE UTILITY MODEL

The application provides a detection device for detect the stitch position degree on the connector. On the basis of improving the detection precision, have detection efficiency concurrently. The application specifically comprises the following technical scheme:

a detection device comprising a support; the conveying unit is connected to one side of the bracket in a sliding manner and is used for conveying the measured object; the acquisition unit is fixedly connected with the bracket and arranged towards the transmission unit; the illumination unit comprises a first illumination part and a second illumination part, the first illumination part and the second illumination part are symmetrically arranged on two sides of the acquisition unit, light rays emitted by the first illumination part and light rays emitted by the second illumination part are mutually overlapped on a measured object, and the acquisition unit is used for acquiring light rays reflected by the measured object.

This application detection device passes through the conveying unit and transports the testee, makes it pass through before the acquisition unit. Then, the measured object is irradiated by the first irradiation part and the second irradiation part on two sides of the split collecting unit, so that the measured object is in a high-brightness state in the process of passing through the collecting unit. And finally, acquiring the image in the highlight state by using an acquisition unit facing the detected object, and subsequently detecting the detected object by using an image processing technology. This application detection device adopts the mode of both sides illumination to polish the measured object, has eliminated the influence that the reflected light probably caused to the acquisition unit formation of image, and then has promoted detection device's precision and efficiency.

In a possible implementation manner, the acquisition unit includes a camera and a telecentric lens, the telecentric lens is located between the camera and the transmission unit, and the camera acquires the light reflected by the measured object through the telecentric lens.

In the implementation mode, the telecentric lens has the characteristics of large depth of field, high definition, low distortion and the like, and the mode of matching the telecentric lens with the camera is adopted to acquire the image of the measured object, so that a better imaging effect can be obtained.

In a possible implementation manner, the camera is a line scanning camera, a scanning direction of the line scanning camera is perpendicular to a sliding direction of the conveying unit, light rays emitted by the first irradiation part and the second irradiation part are both linear, and the two linear light rays are overlapped on the object to be measured.

In this implementation, adopt line scanning camera to gather the measured object, can promote the detection precision of acquisition unit.

In a possible implementation manner, the detection device includes a first adjusting unit, the first adjusting unit is connected between the first irradiation portion and the support, the first adjusting unit is also connected between the second irradiation portion and the support, and the first adjusting unit is used for adjusting a distance between the first irradiation portion and the second irradiation portion relative to the conveying unit.

In this implementation, the heights corresponding to the measured object are different, and the heights of the first irradiation part and the second irradiation part can be adjusted through the first adjusting unit, so that the light rays are overlapped at the preset height.

In one possible implementation manner, the first illuminating part includes at least two first sub-illuminators, the second illuminating part includes at least two second sub-illuminators, the number of the first sub-illuminators is the same as that of the second sub-illuminators, each first sub-illuminator and one second sub-illuminator are symmetrically arranged on two sides of the collecting unit, and light emitted by the symmetrically arranged first sub-illuminators and second sub-illuminators are mutually overlapped on the object to be measured.

In this implementation, corresponding to different features to be detected on the object to be detected, a pair of first sub-illuminators and second sub-illuminators may be used to match one feature, and a plurality of pairs of first sub-illuminators and second sub-illuminators may be used to match a plurality of features.

In one possible implementation, the first adjusting unit further includes a plurality of first adjusting sub-units, each connected to a pair of symmetrically arranged first and second sub-illuminators and used for adjusting a distance between the symmetrically arranged first and second sub-illuminators with respect to the transfer unit.

In this implementation, there may be a difference in height between different features of the object to be measured, and therefore the first sub illuminators and the second sub illuminators arranged in pairs form a difference in height corresponding to the light rays overlapped on the object to be measured, so that each pair of the first sub illuminators and the second sub illuminators can be matched to the features of the object to be measured at different heights.

In one possible implementation manner, the light emitted by the first sub-illuminator and the light emitted by the second sub-illuminator which are symmetrically arranged have the same color, and the light emitted by different first sub-illuminators has different colors.

In this implementation manner, the colors of the light emitted by the first sub-illuminator and the second sub-illuminator which are arranged in pairs are the same, so that the gray scales of the light corresponding to the same characteristic in the acquired image are the same. And the light colors of different first sub-illuminators are different, so that the light corresponding to different characteristics generates gray level difference in the acquired image, and the subsequent image processing is facilitated.

In a possible implementation manner, the device further comprises a basic lighting unit, wherein the basic lighting unit is fixedly connected with the support and is positioned between the acquisition unit and the transmission unit and used for providing basic lighting towards the measured object.

In this implementation, the introduction of the basic illumination unit can provide basic illumination for the object to be measured, and forms a cooperation with the light provided by the illumination unit.

In one possible implementation, the color of the light emitted by the base lighting unit is different from the color emitted by the lighting unit.

In this implementation manner, the color of the basic illumination is set to be different from the color emitted by the illumination unit, so that a gray level difference is formed between the background of the object to be detected and the feature to be detected, and the detected feature is easier to identify.

In one possible implementation, the light color of the lighting unit and the light color of the base lighting unit are respectively one of red, green and purple.

In a possible implementation manner, the device further comprises a second adjusting unit, wherein the second adjusting unit is connected between the collecting unit and the bracket and used for adjusting the distance between the collecting unit and the conveying unit.

In this implementation, the distance between acquisition unit and the support can be adjusted through the second regulating unit to the size difference that corresponds the measured object, and then guarantees that acquisition unit can realize reliably focusing to the measured object.

Drawings

FIG. 1 is a schematic structural diagram of an external appearance of a detecting device provided in the present application;

FIG. 2 is a schematic diagram of an internal structure of a detecting device provided in the present application;

FIG. 3 is a schematic diagram of an object to be detected by a detecting device provided in the present application;

fig. 4 is a schematic partial structure diagram of an object to be detected, which is detected by the detection device provided in the present application;

FIG. 5 is a schematic diagram of the internal structure of the protective cover of the detecting device provided in the present application;

FIG. 6 is a schematic side view of the internal structure of the protective cover of the detecting device provided in the present application;

fig. 7 is a schematic plan view of a detected object detected by a detecting device provided in the present application;

FIG. 8a is a schematic diagram of a planar image obtained by detecting an object to be detected by a detecting device in the prior art;

FIG. 8b is a schematic plane image of an object to be detected by the detecting device provided in the present application;

FIG. 9 is a schematic view of a partial structure of the interior of a detection device provided herein;

FIG. 10 is a schematic view of an acquisition unit of a detection apparatus provided herein;

FIG. 11 is a schematic view of an illumination unit and a collection unit of a detection device provided herein;

FIG. 12 is a schematic view of a partial structure of the interior of a detection device provided herein;

FIG. 13 is a side view of a portion of the internal structure of an inspection device according to the present disclosure;

FIG. 14 is a schematic illustration of the operation of a test device provided herein in one embodiment;

fig. 15 is a schematic plan view of another object to be detected corresponding to the detecting device provided in the present application;

FIG. 16 is a schematic representation of a planar image of an object under test of a test device provided herein in one embodiment;

FIG. 17 is a schematic plan view of an embodiment of a device for detecting an object under test;

FIG. 18 is a schematic diagram of a first sub-illuminator in a detecting device provided in the present application;

fig. 19 is a schematic plan view of a detecting device provided in the present application for detecting an object to be detected in an embodiment.

Detailed Description

Technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Fig. 1 illustrates an external appearance structure of a detection apparatus 100 of the present application.

The detecting device 100 includes a carriage 50 and a transfer unit 40. The carriage 50 is used for carrying the internal components of the detection apparatus 100, and the transfer unit 40 is disposed at one side of the carriage 50 and is slidable with respect to the carriage 50. The transfer unit 40 may be used to carry and transport the object under test 200, carrying the object under test 200 (see fig. 2) from one side of the rack 50 to the other side in its sliding direction (defined as a first direction 001 in this specification).

In the schematic illustration of fig. 1, the bracket 50 is of a closed structure, and the rest of the components of the detection apparatus 100 are accommodated in the closed structure of the bracket 50, so as to protect the rest of the components and ensure that the detection environment is not interfered by the external environment. In other embodiments, the stent 50 may also be an open structure. The transfer unit 40 is provided with a feed port 41 and a discharge port 42 in its sliding direction, respectively. Wherein the inlet 41 is located at one side of the support 50 and the outlet 42 is located at the other side of the support 50. It is understood that the object 200 is introduced into the transfer unit 40 from the inlet 41, then is carried by the transfer unit 40, passes through the inside of the rack 50, and is finally carried out of the transfer unit 40 from the outlet 42.

In the illustration of fig. 1, the stand 50 is further provided with a viewing window 501, a display area 502, a working area 503, an indicator lamp 504, and the like. The observation window 501 is made of transparent materials such as glass and plastic, so that a user can observe the inside of the sealing structure of the bracket 50 through the observation window 501 conveniently; the display area 502 may be used to display test results or real-time parameters, etc.; the working area 503 is communicated to the inside of the sealing structure of the bracket 50, so that the user can manually adjust or operate the internal structure of the detection device 100; the indicator lamp 504 can be used to emit light of different colors to indicate the current working status of the detection apparatus 100. It can be understood that the components of the bracket 50 may be arbitrarily matched based on actual detection requirements, and the implementation of the solution of the detection apparatus 100 of the present application is not affected.

Fig. 2 illustrates the structure of the detecting unit 100 in a closed space.

The holder 50 further comprises a base 505 and a shield 506. The transfer unit 40 includes a guide rail 43 extending in the first direction 001. The components inside the detection apparatus 100 are further accommodated in the protective cover 506, i.e. the components inside the detection apparatus 100 are protected by the protective cover 506. The shield 506 is fixedly connected to the base 505, and the rail 43 is disposed between the shield 506 and the base 505. The object 200 is placed on the rail 43 and transported in the first direction 001 via the rail 43.

In the illustration of fig. 2, the track 43 is disposed below the shield 506. It can be understood that the transfer unit 40 is disposed at the lower side of the bracket 50. In other embodiments, the transferring unit 40 may be disposed above the rack 50 or disposed at the side of the rack 50. The relative position of the transfer unit 40 and the carriage 50 is not particularly limited in the present application.

In the illustration of fig. 2, a sensor 431 is also provided on one side of the rail 43. The sensor 431 is located on the side of the shield 506 near the inlet 41, and the sensor 431 is used for sensing whether the object 200 is fed into the shield 506. The sensor 431 may be implemented in the form of a grating. When the object 200 moves along the track 43, it moves to the position of the sensor 431, and the sensing of the sensor 431 is triggered. The detection device 100 can receive the sensing signal of the sensor 431 and then start the operation of the other components for detection, and then the detected object 200 is sent into the protective cover 506 to acquire the detection data. When no object under test 200 triggers the sensing of the sensor 431, the rest of the components of the detecting device 100 for detecting can be in a standby or low power consumption state.

On the other hand, the object 200 of the present application may be a connector, and particularly, refer to fig. 3.

Fig. 3 illustrates a connector having a generally rectangular shape with a plurality of pins, including a first pin 201 and a second pin 202, protruding from an outer surface of one side thereof. Wherein the outer surface of the connector is generally divided into a first region 210 and a second region 220. The first pins 201 are arranged in the first region 210 in a concentrated manner, and the second pins 202 are arranged in the second region 220. Meanwhile, the second pins 202 are also arranged on the periphery of the outer surface. The first pin 201 and the second pin 202 are used to realize the data transmission function of the connector. The first pin 201 can be used for transmitting signals, and the second pin 202 is located at the periphery of the first pin 201 and can be used for grounding, so that a reliable shielding effect is formed on the signals transmitted by the first pin 201.

Please refer to fig. 4. Fig. 4 illustrates the arrangement of the first pins 201 in the first region 210. In the illustration of fig. 4, the first stitches 201 are arranged in a substantially array within the first area 210. The two directions of the array are shown as the X-axis and Y-axis, respectively, in fig. 4. The first pins 201 are protruded in the first region 210, and the position, height and distance between two adjacent first pins 201 relative to the first region 210 all affect the signal transmission quality of the connector.

Fig. 5 illustrates a specific structure inside the shield 506.

The detection apparatus 100 of the present application further includes a collection unit 10 and an illumination unit 20 (schematically illustrated as a first illumination section 21 and a second illumination section 22 in fig. 5). The stand 50 further comprises a support frame 51. The support frame 51 is straddled on the rails 43, i.e., the cross members of the support frame 51 are arranged perpendicularly to the first direction 001 (illustrated as the second direction 002 in fig. 5). The pickup unit 10 is fixedly connected to the support frame 51 and positioned above the rail 43. The collecting unit 10 is further disposed toward the track 43, that is, the image collecting viewing angle area of the collecting unit 10 is disposed toward the track 43, so that the collecting unit 10 can collect the image of the measured object 200 when the track 43 carries the measured object 200 to pass under the collecting unit 10.

Referring to fig. 6, the lighting unit 20 includes a first illuminating portion 21 and a second illuminating portion 22. The first irradiation part 21 and the second irradiation part 22 are arranged on opposite sides of the acquisition unit 10. In the present embodiment, the first irradiation part 21 and the second irradiation part 22 are also arranged at both sides of the collecting unit 10 along the first direction 001. The first irradiation part 21 and the second irradiation part 22 are symmetrically disposed with respect to the pickup unit 10. That is, a first included angle a1 is formed between the first illuminating part 21 and the central axis of the collecting unit 10, a second included angle a2 is formed between the second illuminating part 22 and the central axis of the collecting unit 10, and the first included angle a1 and the second included angle a2 are equal in angle. The first illuminating part 21 and the second illuminating part 22 are both used for emitting light towards the object to be measured 200, and are used for providing illumination for the acquisition unit 10, so that the accuracy of the image acquired by the acquisition unit 10 on the object to be measured 200 is ensured.

The detection device in the prior art mostly adopts a top illumination mode, and the projection direction of illumination light is consistent with the image acquisition direction, so that reflected light of a detected object is easily received, the imaging quality is poor, and the detection precision is damaged. Referring back to fig. 3, the second region 220 of the connector is a metal substrate, and the material of the second region is the same as or similar to that of the second pin 202, so that it is difficult for the prior art detection device to accurately identify the second pin 202. In the first region 210, although the substrate is made of plastic, a metal frame is present around the substrate. Referring to fig. 7, the peripheral metal frame (schematically shown as a in fig. 7) is made of a similar material to the first stitch 201, and the brightness difference formed after reflection is also substantially the same, so that in the subsequent image processing, the gray level of the metal frame a is close to the gray level of the first stitch 201, and it is difficult for the prior art detection device to identify the position degree of the first stitch 201. Meanwhile, in some embodiments, a metal structure (indicated as b in fig. 7) other than the first pins 201 is also present in the base material of the first region 210, and this metal structure also interferes with the identification of the first pins 201.

In the detection device 100 of the present application, the light beams emitted from the first irradiation portion 21 and the second irradiation portion 22 toward the object 200 overlap each other on the object 200. And the overlapping area of the light beams between the first irradiation part 21 and the second irradiation part 22 is within the image capturing view angle area of the capturing unit 10. Therefore, when the acquisition unit 10 acquires an image of the object 200 to be measured, the first illumination part 21 and the second illumination part 22 are respectively projected onto the object 200 to be measured from two different directions, so that the brightness of the object 200 to be measured is improved, and the defect that the partial area under the unidirectional light source is shaded to influence the imaging quality is avoided. And because the first irradiation part 21 and the second irradiation part 22 respectively project light rays obliquely towards the object 200 to be measured, the reflected light rays formed on the object 200 to be measured are not easily received by the acquisition unit 10, and therefore, the influence of the reflected light on the imaging of the acquisition unit 10 is avoided. The detection device 100 of the present application thus improves the detection accuracy, and thus synchronously improves the detection efficiency.

On the other hand, as shown in fig. 4, the top of the first stitch 201 is generally in the shape of a sharp corner. With the miniaturization trend of the connector, the structure of the first pins 201 is gradually reduced, and the angle of the sharp corner at the top is also reduced. For the prior art detection device, the light irradiation direction has low sensitivity to capture the shape of the sharp corner, or the prior art detection device has poor imaging effect at the position of the sharp corner. As shown in fig. 8a and 8b, in order to eliminate the detection accuracy decrease caused by too small sharp corner, the prior art detection device usually flattens the top position of the first stitch 201, increases the reflective area of the top sharp corner, and thus improves the brightness (see fig. 8 a). By the action of the first irradiation part 21 and the second irradiation part 22, which respectively irradiate the first pins 201 from two side positions, the light at the sharp corner position can be reflected more to the collection unit 10 (see fig. 8 b). From this, this application detection device 100 is through the setting of above-mentioned scheme for under the prerequisite that remains the top closed angle of first stitch 201, also can provide the sufficient light of first stitch 201 and shine, thereby guarantee the accuracy of the image at the first stitch 201 top of the correspondence that acquisition unit 10 gathered, and then make detection device 100's detection precision further promote.

Referring to fig. 9, it can be seen that the acquisition unit 10 includes a camera 11 and a telecentric lens 12 corresponding to the partial structure in fig. 6. The camera 11 and the telecentric lens 12 are arranged in the same direction and fixed toward the object 200. Wherein the telecentric lens 12 is closer to the object 200 to be measured than the camera 11. It is understood that the camera 11 is used for capturing images, and the telecentric lens 12 is used for magnifying the images of the object 200 to improve the quality of the images captured by the camera 11. The telecentric lens 12 has the characteristics of large depth of field, high definition, low distortion and the like, and the telecentric lens 12 is matched with the camera 11 to acquire images of the measured object, so that a better imaging effect can be obtained. In the illustration of fig. 9, the telecentric lens 12 is also implemented by using a double telecentric lens, which can further improve the imaging precision of the camera 11.

For the camera 11 used in the acquisition unit 10 of the present application, in some embodiments, a line scan camera may be used. Referring to fig. 10, the collection view angle area of the line scan camera is linear, and the length and width of the view angle area are larger. The maximum width of the line scan camera in the scan direction can be up to 80mm, while in the direction perpendicular to the scan direction, it is roughly the viewing angle area of two pixels. From this line sweep camera's precision can reach about 10um to promote imaging effect. In the illustration of fig. 10, the scanning direction of the line scanning camera is arranged along a second direction 002, the second direction 002 being perpendicular to the first direction 001. Therefore, when the rail 43 passes the object to be measured 200 along the first direction 001 from the lower part of the acquisition unit 10, the line scanning camera can obtain a plurality of high-precision linear image data of the object to be measured 200 through continuous scanning imaging, and then the data are spliced through an image processing technology, so that complete image data of the object to be measured 200 can be obtained.

For the embodiment of the camera 11 using a line scanning camera, the light of the illumination unit 20 may also be set to be a linear light, so as to form a linear illumination effect on the object 200. Please refer to fig. 10 in combination with fig. 11. The light beams emitted from the first and second irradiation portions 21 and 22 are both in the shape of a planar fan. The light rays form a straight line when projected on the object 200 to be measured. At this time, when the light beams of the first irradiation part 21 and the second irradiation part 22 overlap each other, the overlapped light beams are also a straight line. Further controlling the first included angle a1 and the second included angle a2 of the first illuminating part 21 and the second illuminating part 22 respectively relative to the collecting unit 10 can control the overlapped light rays to be just in the collecting visual angle area of the line scanning camera, thereby forming an illumination effect on the collecting visual angle area.

Referring back to fig. 5, in the detection apparatus 100 of the present application, the first illumination part 21 may further include a plurality of first sub-illuminators 211 (two are illustrated in fig. 5 — a first sub-illuminator 211a and a first sub-illuminator 211 b). The second illumination part 22 may include a plurality of second sub-illuminators 221 (two are illustrated in fig. 5 — a second sub-illuminator 221a and a second sub-illuminator 221 b). And the number of the first sub-illuminators 211 is the same as the number of the second sub-illuminators 221. Since the first illumination part 21 and the second illumination part 22 are disposed at two opposite sides of the row collecting unit 10, the plurality of first sub-illuminators 211 and the plurality of second sub-illuminators 221 are also disposed at two opposite sides of the row collecting unit 10. Further, the plurality of first sub-illuminators 211 are arranged side by side in the second direction 002, and the plurality of second sub-illuminators 221 are also arranged side by side in the second direction 002. Each of the first sub-illuminators 211 corresponds to a position of one of the second sub-illuminators 221, forming a pair of sub-illuminators symmetrical to each other.

Thus, as shown in fig. 5, two pairs of mutually symmetrical sub-illuminators, a first sub-illuminator 211a and a second sub-illuminator 221a, and a first sub-illuminator 211b and a second sub-illuminator 221b, are correspondingly formed on both sides of the collecting unit 10. Referring to fig. 6 and 9 synchronously, for the first sub-illuminator 211a and the second sub-illuminator 221a arranged in pairs, they are symmetrical with each other with respect to the collecting unit 10, and the light emitted by the first sub-illuminator 211a and the light emitted by the second sub-illuminator 221a overlap each other, and when they fall on the object 200, the light overlapping each other is within the collecting view angle area of the camera 11.

See the schematic of fig. 12 and 13. Both figures illustrate the morphology of the remaining structure of fig. 6, in addition to the partial structure of fig. 9. In the present embodiment, the first sub-illuminator 211b and the second sub-illuminator 221b, which are arranged in pairs, are also symmetrical to each other with respect to the collecting unit 10, and when the light beams emitted by the first sub-illuminator 211b and the second sub-illuminator 221b overlap each other and also fall on the object 200, the light beams that overlap each other are also within the collecting angle of view region of the camera 11.

Referring back to fig. 3, the object under test 200 is a schematic representation of a connector. In the illustration of fig. 3, there is a height difference between the first pin 201 and the second pin 202 in the connector. And the position of the light overlapping of each pair of the sub-illuminators arranged in pairs respectively has a unique height. That is, as shown in fig. 14, in the present embodiment, the pairs of the first sub-illuminator 211a and the second sub-illuminator 221a, whose emitted light is overlapped at the first height h 1; and pairs of the first sub-illuminator 211b and the second sub-illuminator 221b, which emit light overlapping at the second height h 2. The first height h1 may correspond to the height setting of the first pin 201, and the second height h2 corresponds to the height setting of the second pin 202. It will be appreciated that the first height h1 and the second height h2 are co-located in the first direction 001, i.e. both overlapping rays are located within the viewing angle area of the acquisition unit 10. At the same time, both overlapping light rays also extend in the second direction 002.

Thus, when the connector moves with the rail 43 to below the pickup unit 10, when the first stitch 201 moves into the viewing angle region of the pickup unit 10, the top of the first stitch 201 coincides with the light at the first height h1, that is, the light emitted from the pair of the first sub irradiator 211a and the second sub irradiator 221a overlaps at the top of the first stitch 201. At this time, the top of the first pin 201 is in a high brightness state, and the collecting unit 10 may correspondingly extract the image information of the first pin 201; when the second pin 202 of the connector moves into the viewing angle area of the collecting unit 10, the top of the second pin 202 is exactly overlapped with the light at the second height h2, that is, the light emitted from the pairs of the first sub-illuminator 211b and the second sub-illuminator 221b is overlapped on the top of the second pin 202. At this time, the top of the second pin 202 is in a high brightness state, and the capturing unit 10 may extract image information corresponding to the second pin 202.

Fig. 15 illustrates a structure of a connector, and fig. 16 and 17 illustrate captured images of the first pin 201 and the second pin 202 in a highlighted state, respectively. It can be seen that, under the condition that the rest positions of the connector are not irradiated by the overlapped light, the imaging effect of the first pin 201 and the second pin 202 is obvious, images of the first pin 201 and the second pin 202 can be effectively extracted, and an accurate detection result can be obtained by combining with subsequent image processing. It can be understood that, for the detection apparatus 100 of the present application, when the connector further includes a third pin and a fourth pin, the number of the sub-illuminators arranged in pairs may be increased correspondingly, and the height of the light overlapping of each sub-illuminator may be set correspondingly, so as to implement the position detection function for the pins with different shapes (mainly height shapes).

For the embodiment of the connector as the object under test 200, the position degrees of the first pin 201 and the second pin 202 are the items to be tested by the testing device 100 of the present application. Therefore, the image information of the top of the first pin 201 and the second pin 202 is the corresponding features of the first pin 201 and the second pin 202 that need to be extracted in the subsequent image processing step. It can be understood that the object under test 200 of the detection device 100 of the present application may not be limited to a connector product, and the detection device 100 of the present application can also be adapted to the detection requirement when detecting other products having similar structures and having a position detection requirement. When other products need to detect the position degree of structures with different heights, the detection device 100 can adjust the number of the sub-illuminators arranged in pairs, and further achieve corresponding detection requirements.

Referring back to fig. 5, the detecting device 100 of the present application further includes a first adjusting unit 61 and a second adjusting unit 62. Referring to fig. 6 and 12, the first adjusting unit 61 includes a first adjusting sub-unit 611 and a second adjusting sub-unit 612. The first adjusting unit 61 is connected between the first irradiation part 21 and the supporting frame 51, the first adjusting unit 61 is also connected between the second irradiation part 22 and the supporting frame 51, and the first adjusting unit 61 is used for adjusting the distance between the first irradiation part 21 and the second irradiation part 22 relative to the conveying unit 40. It is understood that the heights of the first and second irradiation parts 21 and 22 may be adjusted by the first adjusting unit 61 so that the light is overlapped at a preset height, corresponding to the difference in height of the object 200 to be measured. The second adjusting unit 62 is connected between the collecting unit 10 and the supporting frame 51, and the second adjusting unit 62 is slidably connected with respect to the supporting frame 51 and can also be used for adjusting the distance between the collecting unit 10 and the conveying unit 40. The height of the collecting unit 10 is adjusted according to the height difference of the object 200, so that the collecting unit 10 can form more accurate focusing effect on the object 200.

Referring to fig. 9 in cooperation, the first adjusting sub-unit 611 is connected between the first sub-irradiators 211a and the support frame 51 arranged in pairs, and the first adjusting sub-unit 611 is also connected between the second sub-irradiator 221a and the support frame 51. Also described, one end of the first adjusting subunit 611 is slidably connected to the support frame 51, and the other end of the first adjusting subunit 611 is fixedly connected to the first and second sub-illuminators 211a and 221a arranged in pairs, respectively. The sliding of the first adjusting sub-unit 611 with respect to the support frame 51 may be adjusted to the height of the first and second sub-illuminators 211a and 221a arranged in pairs, thereby achieving adjustment of the height of the light rays overlapped therewith.

Referring again to fig. 12, the second adjusting sub-unit 612 is connected between the first sub-irradiators 211b and the support frame 51 arranged in pairs, and the second adjusting sub-unit 612 is also connected between the second sub-irradiator 221b and the support frame 51. Also described, one end of the second adjusting sub-unit 612 is slidably connected to the support frame 51, and the other end of the second adjusting sub-unit 612 is fixedly connected to the first and second sub-illuminators 211b and 221b arranged in pairs, respectively. The sliding of the second self-adjusting unit 612 with respect to the support frame 51 may be adjusted to the height of the first sub-illuminator 211b and the second sub-illuminator 221b arranged in pair, thereby achieving adjustment of the height of the light rays overlapped therewith.

Thus, by adjusting the first adjusting sub-unit 611 and the second adjusting sub-unit 612, respectively, the height positions of the first sub-irradiator 211a and the first sub-irradiator 211b can be set to be different, and the heights of the corresponding second sub-irradiators 221a and 221b are also made to be different, so that two sets of overlapped light rays are set to correspond to the heights of the first pin 201 and the second pin 202, respectively. It is understood that, when the connector further includes a third pin and a fourth pin, the number of the adjusting sub-units in the first adjusting unit may be correspondingly increased, and each adjusting sub-unit is fixedly connected to a pair of sub-illuminators, and may slide relative to the supporting frame 51, so as to correspondingly adjust the height of the light overlapping of each pair of sub-illuminators.

Referring to fig. 18, in the structure in which the first adjusting sub-unit 611 is connected to each sub-illuminator (schematically, the first sub-illuminator 211a in fig. 18), a rotating shaft 613 may be additionally provided, and the rotating shaft 613 is rotatably connected between the first sub-illuminator 211a and the first adjusting sub-unit 611. The first sub-illuminator 211a may also rotate with respect to the first adjusting sub-unit 611 by the rotating shaft 613 to adjust the light exit angle of the first sub-illuminator 211 a. It is understood that the light emitting angle of the first sub-illuminator 211a may be adjusted to the light projection height of the first sub-illuminator 211a relative to the object 200. When the second sub-illuminator 221a is also rotatably connected to the first adjusting sub-unit 611 via the rotating shaft 613, and the emitting angle of the light to the second sub-illuminator 221a is correspondingly adjusted, the height of the overlapped light of the first sub-illuminator 211a and the second sub-illuminator 221a arranged in pair is also adjusted.

In the embodiment of fig. 18, the number of the rotating shafts 613 is two, and the axial directions of the two rotating shafts 613 are perpendicular to each other, whereby a larger angular adjustment range can be formed for the first sub-illuminator 211 a. Further, in fig. 18, a rotating disc 614 is further disposed between the first sub-illuminator 211a and the first adjusting sub-unit 611, the rotating disc 614 can also be used to realize the angle adjustment between the first sub-illuminator 211a and the first adjusting sub-unit 611, and the axial direction of the rotating disc 614 and the axial direction of the two rotating shafts 613 are also different, and the structure of fig. 18 further expands the angle adjustment range between the first sub-illuminator 211a and the first adjusting sub-unit 611. It is understood that, for the testing device 100 of the present application, the rotation shaft 613 and the turntable 614 may be adjusted manually or electrically without affecting the functional performance thereof.

In one embodiment, the light emitted from the first sub-illuminator 211a and the light emitted from the second sub-illuminator 221a are the same color. For example, the first sub-illuminator 211a and the second sub-illuminator 221a, which are symmetrically arranged, may be simultaneously used to emit red light (with wavelengths of 620nm to 750nm), and the overlapping light formed by the two on the object 200 is also red. When the light rays which are red are projected to the top of the first pin 201, the color of the top of the first pin 201 collected by the collecting unit 10 is also red, and the gray values of the tops of the first pins 201 in the subsequent image processing tend to be consistent.

The color of the emitted light may be different between the first sub-illuminator 211a and the first sub-illuminator 211 b. For example, when the first sub-illuminator 211a is used to emit red light, the first sub-illuminator 211b may be used to emit green light. At this time, the symmetrically arranged first and second sub-illuminators 211a and 221a emit red light simultaneously, and the symmetrically arranged first and second sub-illuminators 211b and 221b emit green light (having a wavelength of 495nm to 570nm) simultaneously. Since the first sub-illuminator 211b and the second sub-illuminator 221b are both used for illuminating the second pins 202, the color of the top of the second pin 202 collected by the collecting unit 10 is green, and the gray value of the top of each second pin 202 tends to be uniform.

Under such a setting, since the top of each first pin 201 is red, the gray level thereof is the gray level corresponding to red in the subsequent image processing process, and the top of each second pin 202 is green, the gray level thereof is the gray level corresponding to green. In the subsequent image processing process, the gray-scale value characteristics of the first pin 201 and the second pin 202 form a larger difference, so that the detection apparatus 100 can distinguish the first pin 201 and the second pin 202 more easily, and the phenomenon of detection accuracy reduction possibly caused by the close gray-scale values of the first pin 201 and the second pin 202 is also avoided.

In the above embodiment, when the number of pairs of sub-illuminators is large, the colors of the light emitted by each pair of sub-illuminators may be set to be different, so that the gray values of the stitches at various heights are different, and the stitches at various heights can be accurately identified in the subsequent image processing process. The light of each sub-illuminator may be any one of red, green and blue. For image acquisition, the three colors are three primary colors, and the sensitivity of the camera 11 to the three colors is the highest, so that the three colors can be distinguished more easily. If the required colors are more than three, orange, purple, yellow and other colors can be selected, and the colors have larger contrast difference compared with red, green and blue.

Referring back to fig. 5 and 9, the detection device 100 of the present application may further include a base illumination unit 30. The basic lighting unit 30 is disposed between the collecting unit 10 and the transmitting unit 40, the basic lighting unit 30 is provided with a light hole 31, and the collecting unit 10 collects an image of the object 200 through the light hole 31. An annular light emitter (not shown) is disposed at the periphery of the light hole 31 on the side close to the transfer unit 40. The ring illuminator 32 can emit light toward the object to be measured 200 on the transfer unit 40, thereby forming base illumination for the object to be measured 200. It will be appreciated that the light of the base illumination acts on the entire outer surface of the object under test 200, increasing the overall brightness of the object under test 200. And the light emitted by the illumination unit 20 to each feature of the object 200 can compensate the illumination dead angle possibly existing in the illumination unit 20, so that the image acquired by the acquisition unit 10 is clearer.

On the other hand, since the basic illumination unit 30 uses the ring-shaped light emitter to provide illumination, the light projected onto the object to be measured 200 is also ring-shaped, and the ring-shaped area is located at the periphery of the viewing angle area of the acquisition unit 10. Therefore, the defect that the light emitted by the basic lighting unit 30 is directly reflected to the acquisition unit 10 to influence the image acquisition of the acquisition unit 10 is avoided. Meanwhile, in some embodiments, the color of the light emitted by the base illumination unit 30 is set to be different from the color emitted by the illumination unit 20. For example, in correspondence with the above-described embodiment in which the illumination units 20 emit red and green light, respectively, the light emitted from the base illumination unit 30 may be set to purple. Since the base illumination unit 30 is used to illuminate the outer surface of the object to be measured 200, the outer surface is actually the background area of the picture acquired by the acquisition unit 10. Therefore, the color of the light emitted by the basic lighting unit 30 is greatly different from the color of the light emitted by the lighting unit 20, so that the contrast between each feature part and the background area can be improved, and the feature parts and the background area can be distinguished and identified conveniently in the following process.

Referring to the schematic illustration of fig. 19, in some embodiments, the edge of the connector is further provided with a positioning post 203. When the basic illumination unit 30 emits light toward the object 200 to be measured, the position of the positioning column 203 is obvious, and the acquisition unit 10 can also obtain a relatively clear image of the positioning column 203. Under the effect of basic lighting unit 30, reference column 203 can regard as the benchmark in the later stage image processing process to the image stitching in-process is rectified based on the shape of reference column 203, thereby promotes image processing's quality, and promotes the detection precision of this application detection device 100.

The above description is only for the specific embodiment of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions, such as the reduction or addition of structural elements, the change of shape of structural elements, etc., within the technical scope of the present application, and shall be covered by the scope of the present application; the embodiments and features of the embodiments of the present application may be combined with each other without conflict. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. A detection device, comprising:

a support;

the conveying unit is connected to one side of the bracket in a sliding manner and is used for conveying a measured object;

the acquisition unit is fixedly connected with the bracket and arranged towards the transmission unit;

the lighting unit comprises a first irradiation part and a second irradiation part, wherein the first irradiation part and the second irradiation part are symmetrically arranged at two sides of the acquisition unit, light rays emitted by the first irradiation part and light rays emitted by the second irradiation part are mutually overlapped on the measured object, and the acquisition unit is used for acquiring light rays reflected by the measured object.

2. The detection device according to claim 1, wherein the collection unit comprises a camera and a telecentric lens, the telecentric lens is located between the camera and the transmission unit, and the camera collects the light reflected by the object to be detected through the telecentric lens.

3. The detecting device according to claim 2, wherein the camera is a line scanning camera, a scanning direction of the line scanning camera is perpendicular to a sliding direction of the conveying unit, light rays emitted from the first illuminating portion and the second illuminating portion are both linear, and the two linear light rays are overlapped on the object to be detected.

4. The inspection device according to any one of claims 1 to 3, wherein the inspection device comprises a first adjustment unit connected between the first irradiation portion and the support, the first adjustment unit also being connected between the second irradiation portion and the support, the first adjustment unit being configured to adjust a distance between the first irradiation portion and the second irradiation portion with respect to the transport unit.

5. The detection device according to any one of claims 1 to 3, wherein the first irradiation part comprises at least two first sub-irradiators, the second irradiation part comprises at least two second sub-irradiators, the number of the first sub-irradiators is the same as that of the second sub-irradiators, each of the first sub-irradiators and one of the second sub-irradiators are symmetrically arranged on two sides of the collection unit, and light rays emitted by the first sub-irradiators and the second sub-irradiators which are symmetrically arranged are mutually overlapped on the object to be detected.

6. The apparatus according to claim 5, wherein the first sub-illuminators are arranged side by side along a sliding direction of the conveying unit, and each pair of the first sub-illuminators and the second sub-illuminators arranged symmetrically have different heights of overlapping of light on the object to be measured.

7. The detecting device for detecting the rotation of a motor rotor as claimed in claim 5, wherein the light emitted by the first sub-illuminator and the light emitted by the second sub-illuminator which are symmetrically arranged have the same color, and the light emitted by different first sub-illuminators has different colors.

8. The device according to any one of claims 1 to 3, further comprising a base illumination unit fixedly connected to the support and located between the acquisition unit and the transmission unit for providing base illumination towards the object to be tested.

9. The detecting device for detecting the rotation of a motor rotor as claimed in claim 8, wherein the color of light emitted by the basic lighting unit is different from the color emitted by the lighting unit.

10. The detecting device according to any one of claims 1 to 3, further comprising a second adjusting unit connected between the collecting unit and the support for adjusting a distance between the collecting unit and the transferring unit.

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