CN219872426U - TOF camera module calibration device - Google Patents

Abstract

The utility model discloses a TOF camera module calibration device, and belongs to the technical field of camera modules; the TOF camera module calibration device comprises: the device comprises a support piece, a rotating mechanism, a connecting jig and a back plate; the rotating mechanism is fixedly arranged on the supporting piece, and the connecting jig is fixedly arranged on the rotating end of the rotating mechanism so as to adjust the deflection angle of the TOF camera module to be calibrated, which is arranged on the connecting jig; the backboard is fixed on the supporting piece in a deflectable way so as to switch the board facing the connecting jig and adjust the included angle between the board facing the connecting jig and the optical axis of the TOF camera module to be calibrated; the two plate surfaces of the backboard are respectively set to be a first calibration surface and a second calibration surface. The TOF camera module calibration device disclosed by the utility model has the advantages of simple structure, small scale and occupied space, convenience in installation and maintenance and low use cost.

Description

TOF camera module calibration device

Technical Field

The utility model belongs to the technical field of camera modules, and particularly relates to a TOF camera module calibration device.

Background

The TOF (Time of Flight) camera module is installed in a terminal device, and is provided with a transmitting end camera and a receiving end camera, the transmitting end camera emits light, and the receiving end camera receives the light and performs 3D imaging. Calibration is required before production and assembly to ensure the quality of the product.

The calibration operation of the TOF camera module is generally completed by a corresponding machine, and the calibration detection operation under multi-angle and multi-working conditions is completed by configuring a connecting jig for the module to be detected and circulating back plates for various detection among various stations. However, the overall structure of the detection machine is large in scale, high in complexity, and high in required installation space, so that the calibration machine is inconvenient to use, and the installation, use and maintenance costs are high.

Disclosure of Invention

The utility model provides a TOF (time of flight) camera module calibration device, which aims to solve the technical problems of large calibration scale, complex structure and high space occupation of a TOF camera module to at least a certain extent. For this purpose,

the embodiment of the utility model provides a TOF camera module calibration device, which comprises: the device comprises a support piece, a rotating mechanism, a connecting jig and a back plate;

the rotating mechanism is fixedly arranged on the supporting piece, and the connecting jig is fixedly arranged on the rotating end of the rotating mechanism so as to adjust the deflection angle of the TOF camera module to be calibrated, which is arranged on the connecting jig;

the backboard is fixed on the supporting piece in a deflectable way so as to switch the board facing the connecting jig and adjust the included angle between the board facing the connecting jig and the optical axis of the TOF camera module to be calibrated;

the two plate surfaces of the backboard are respectively set to be a first calibration surface and a second calibration surface.

In some embodiments, the support comprises a camera bellows, the rotating mechanism and the connecting jig are arranged in the camera bellows, and the deflection axis of the TOF camera module to be calibrated is the optical axis of the TOF camera module to be calibrated.

In some embodiments, the rotation mechanism comprises: a first drive motor and a carrier;

the first driving motor is fixedly arranged on the supporting piece, the carrying platform is connected with the rotating shaft of the first driving motor, and the connecting jig is fixedly arranged on the carrying platform.

In some embodiments, the connection jig comprises: and the spring needle connector is fixedly arranged on the carrier.

In some embodiments, the first drive motor is fixed to the support by a shock mount.

In some embodiments, the first drive motor comprises a stepper motor.

In some embodiments, the back plate is deflectable secured to the support by a deflection shaft, and an axis of the deflection shaft is parallel to the back plate.

In some embodiments, the TOF camera module calibration device further comprises: a back plate driving mechanism;

the backboard driving mechanism is connected with the deflection shaft to drive the deflection shaft to rotate and drive the backboard to deflect.

In some embodiments, the back plate drive mechanism comprises: a second driving motor;

the output end of the second driving motor is connected with the deflection shaft.

In some embodiments, the second drive motor comprises a servo motor.

The embodiment of the utility model has at least the following beneficial effects:

according to the TOF camera module calibration device provided by the embodiment of the utility model, the back plate is arranged on the support piece in a deflectable way, and the two sides of the back plate are respectively arranged to be the calibration surfaces matched with the calibration operation, so that the two calibration surfaces are switched through the deflection operation, the requirement of the calibration plate surface is met, the angle adjustment of the calibration surface and the optical axis of the TOF camera module to be calibrated can be realized, the requirement of the calibration angle is met, the multi-station calibration structure with multiple working conditions is realized by utilizing the plate surface switching and the plate surface angle adjustment, the multi-station calibration structure is not used for circulating calibration among a plurality of stations, the calibration device structure is greatly simplified, the calibration operation flow is simplified, the occupied space is reduced, and the installation and maintenance cost is also reduced to a certain extent.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 shows a schematic structural diagram of a calibration device for a TOF camera module in an embodiment of the present utility model;

fig. 2 is a schematic structural diagram showing a second detection state of the calibration device of the TOF camera module in fig. 1.

Reference numerals:

the device comprises a 1-supporting piece, a 2-damping base, a 3-rotating mechanism, a 4-connecting jig, a 5-deflection shaft, a 6-back plate, 61-a first calibration surface and 62-a second calibration surface.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

The utility model is described below with reference to specific embodiments in conjunction with the accompanying drawings:

referring to fig. 1, an embodiment of the present utility model provides a calibration device for a TOF camera module, which is used for performing calibration operation for the TOF camera module.

Specifically, the TOF camera module calibration device comprises: support 1, rotary mechanism 3, connection tool 4 and backplate 6.

The supporting piece 1 is used as a bearing foundation of the whole device and is used for supporting and fixing other functional structures to form a stable calibration operation structure. Generally, the support 1 may be configured as a box or a camera box, according to the calibration requirements, and other calibration structures are fixed inside.

In the calibration operation, it is generally required that the TOF camera module to be calibrated shoots a specific object after rotating to a certain angle around the optical axis F thereof, so as to complete the calibration operation. Therefore, in order to realize the angle adjustment of the TOF camera module to be calibrated, the rotating mechanism 3 can be fixedly arranged on the supporting piece 1, the connecting jig 4 is fixedly arranged on the rotating end of the rotating mechanism 3, and before the calibration operation, the TOF camera module to be calibrated is correspondingly arranged on the connecting jig 4, so that the connecting jig 4 and the TOF camera module to be calibrated on the connecting jig 4 are driven by the rotating mechanism 3 to deflect, the deflection angle of the TOF camera module to be calibrated around the optical axis F of the TOF camera module to be calibrated is adjusted, and the requirement of the calibration shooting operation is met.

Considering the in-situ rotation of the TOF camera module to be calibrated around the optical axis F thereof, the direction of the optical axis F of the TOF camera module to be calibrated may be consistent with the direction of the rotation axis of the rotation mechanism 3, or may be coaxially arranged.

Because during calibration, the TOF camera module to be calibrated needs to shoot images of a plurality of angles towards a plurality of specific objects so as to finish calibration operation, in the prior art, a plurality of stations are usually arranged, each station is provided with different shooting markers, and the TOF camera module to be calibrated is circulated among the stations so as to finish shooting, which tends to lead to huge and complex whole calibration device scale and structure.

For this purpose, the two plate surfaces of the back plate 6 can be respectively set to be a first calibration surface 61 and a second calibration surface 62, that is, two different shooting markers, and the back plate 6 is fixed on the support 1 in a deflectable manner, so that shooting of the two different markers can be realized by rotating the back plate 6 to switch the plate surfaces towards the connection jig 4; therefore, two different shooting working conditions can be integrated together without arranging a plurality of stations and configuring a plurality of sets of matching structures, the whole structure scale can be greatly simplified, the space occupation requirement is reduced, and correspondingly, the installation and maintenance cost is also reduced.

Meanwhile, the back plate 6 can be operated to deflect to different angles under the condition that the plate surface orientation is unchanged, so that plate images forming a certain included angle with the optical axis of the TOF camera module to be calibrated can be shot, the requirement of calibration shooting is met, and the structural configuration of calibration shooting is further simplified.

In some embodiments, the optical axis F of the TOF camera module to be calibrated may be perpendicular to the rotation axis of the back plate 6, and the optical axis of the TOF camera module to be calibrated intersects with the rotation axis of the back plate 6, so that the first calibration surface 61 and the second calibration surface 62 can be divided into two symmetrical parts by the rotation axis of the back plate 6. When shooting is implemented, the back plate 6 can be deflected to rotate around the rotating shaft by a certain angle, so that the first calibration surface 61 and the second calibration surface 62 can be respectively close to or far away from the TOF shooting module to be calibrated by the same amplitude, the first calibration surface 61 and the second calibration surface 62 can be adjusted in position by the same standard and amplitude, a shooting image under the same standard is obtained, and the reliability of calibration is improved.

Referring to fig. 1 and 2, in some embodiments, the first calibration surface 61 may be configured as Bai Banmian and the second calibration surface 62 may be configured as a checkerboard; the chess board surface can achieve lens calibration, and the white board surface can conduct wiggling calibration, fppn calibration and final verification. Of course, the possibility of other markers is not excluded and will not be described in detail here.

In some embodiments, the rotation mechanism 3 is used for driving the connection jig 4 to rotate, for which purpose, the rotation mechanism 3 may be configured as a combination structure of a first driving motor and a carrier; the first driving motor is used as a rotation driving element, and the carrying platform is used as a bearing structure of the connecting jig 4 and is used for fixing the connecting jig 4 and connecting with the first driving motor to realize rotation driving.

In some embodiments, the carrier may be rotatably disposed on the support 1, and then connected to the first driving motor through a transmission structure such as a gear set, so as to achieve indirect driving. The gear set can be matched to realize a certain degree of speed reduction structure design, and the control of the rotation angle and the speed is optimized.

In some embodiments, the connection jig 4 may be configured as a pogo pin connector, and the pogo pin connector is fixed on the carrier; the TOF camera module to be calibrated can be directly fixed on the spring needle connector and is electrically connected conveniently, so that the TOF camera module to be calibrated can be driven and controlled by connecting the spring needle connector with a driving host machine for calibration, a driving main board and other elements or equipment, and shooting operation can be completed. Of course, the spring pin connector is an alternative connector solution, and other possible connectors are not excluded, and will not be described in detail herein.

In some embodiments, considering that the TOF camera module has smaller overall specification and weight, in order to reduce the accumulation of factors such as motor vibration and the like to affect the gesture and angle of the TOF camera module, the first driving motor may be fixed on the support 1 through the damping base 2, and meanwhile, the resonance noise of the support caused by the motor may be reduced.

In some embodiments, the first drive motor may be configured as a stepper motor for this purpose, considering that it mainly switches the TOF camera module between certain angles; the control of deflection angle is convenient, and the control of deflection accuracy is promoted.

In some embodiments, the back plate 6 is fixed on the support member 1 in a deflectable manner through a deflection shaft 5 fixed on the back plate 6, and the axis of the deflection shaft 5 is parallel to the back plate 6, so that the deflection driving of the first calibration surface 61 and the second calibration surface 62 is realized, and the consistency of the positions and the postures of the two plate surfaces before and after the switching is ensured.

In some embodiments, in order to improve the automation degree and deflection accuracy control, the TOF camera module calibration device may further be provided with a back plate driving mechanism for driving the deflection shaft 5 to rotate, so as to automatically control the deflection of the back plate 6.

When the deflection control of the backboard 6 is implemented, the backboard driving mechanism is connected with the deflection shaft 5 to drive the deflection shaft 5 to rotate and drive the backboard 6 to deflect.

In some embodiments, the back plate driving mechanism may be provided with a second driving motor, and the second driving motor is connected with the deflection shaft 5 and directly drives the deflection shaft 5. Of course, a reduction mechanism may be employed to connect the yaw shaft 5 and the second drive motor. The deflection shaft 5 can also be directly driven in a coaxial and direct connection mode; the method can be flexibly selected according to actual arrangement conditions.

In some embodiments, the second driving motor may be configured as a servo motor, so as to facilitate flexible control and angle accuracy control, considering that the deflection angle of the back plate 6 often needs to be flexibly selected, and that there may be a plurality of different angles.

In some embodiments, the support 1 may be configured as a 400mmx400mm camera bellows, the two calibration surfaces of the back plate 6 may be configured as a 400mmx400mm chess board surface and a 400mmx400mm whiteboard surface, respectively, and the back plate 6 may be rotated 360 degrees for double-sided shooting. When calibration and verification are implemented, the backboard 6 is rotated, so that the chessboard surface rotates for 30 degrees to face the lens, and lens calibration is performed; and then the backboard 6 is rotated, so that the whiteboard surface is parallel to the lens module to carry out wiggling calibration and fppn calibration, and finally, a verification function is carried out.

The embodiment of the utility model has at least the following beneficial effects:

according to the TOF camera module calibration device provided by the embodiment of the utility model, the back plate is arranged on the support piece in a deflectable way, and the two sides of the back plate are respectively arranged to be the calibration surfaces matched with the calibration operation, so that the two calibration surfaces are switched through the deflection operation, the requirement of the calibration plate surface is met, the angle adjustment of the calibration surface and the optical axis of the TOF camera module to be calibrated can be realized, the requirement of the calibration angle is met, the multi-station calibration structure with multiple working conditions is realized by utilizing the plate surface switching and the plate surface angle adjustment, the multi-station calibration structure is not used for circulating calibration among a plurality of stations, the calibration device structure is greatly simplified, the calibration operation flow is simplified, the occupied space is reduced, and the installation and maintenance cost is also reduced to a certain extent.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" indicate orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

It should be noted that all the directional indicators in the embodiments of the present utility model are only used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture, and if the specific posture is changed, the directional indicators are correspondingly changed.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.

In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. The utility model provides a TOF module calibration device that makes a video recording which characterized in that includes: the device comprises a support piece, a rotating mechanism, a connecting jig and a back plate;

the rotating mechanism is fixedly arranged on the supporting piece, and the connecting jig is fixedly arranged on the rotating end of the rotating mechanism so as to adjust the deflection angle of the TOF camera module to be calibrated, which is arranged on the connecting jig;

the backboard is fixed on the supporting piece in a deflectable way so as to switch the board facing the connecting jig and adjust the included angle between the board facing the connecting jig and the optical axis of the TOF camera module to be calibrated;

the two plate surfaces of the backboard are respectively set to be a first calibration surface and a second calibration surface.

2. The TOF camera module calibration device of claim 1, wherein the support comprises a camera bellows, the rotating mechanism and the connecting jig are disposed in the camera bellows, and the deflection axis of the TOF camera module to be calibrated is an optical axis of the TOF camera module to be calibrated.

3. The TOF camera module calibration device of claim 1, wherein the rotation mechanism comprises: a first drive motor and a carrier;

the first driving motor is fixedly arranged on the supporting piece, the carrying platform is connected with the rotating shaft of the first driving motor, and the connecting jig is fixedly arranged on the carrying platform.

4. The TOF camera module calibration device of claim 3, wherein the connection jig comprises a pogo pin connector secured to the carrier.

5. The TOF camera module calibration device of claim 3, wherein the first drive motor is secured to the support member by a shock mount.

6. The TOF camera module calibration device of claim 3, wherein the first drive motor comprises a stepper motor.

7. The TOF camera module calibration device of any one of claims 1-6, wherein the back plate is deflectable secured to the support member by a deflection shaft, and wherein an axis of the deflection shaft is parallel to the back plate.

8. The TOF camera module calibration device of claim 7, further comprising: a back plate driving mechanism;

the backboard driving mechanism is connected with the deflection shaft to drive the deflection shaft to rotate and drive the backboard to deflect.

9. The TOF camera module calibration device of claim 8, wherein the back plate drive mechanism comprises: a second driving motor;

the output end of the second driving motor is connected with the deflection shaft.

10. The TOF camera module calibration device of claim 9, wherein the second drive motor comprises a servo motor.