CN115996316A - Rotation detection assembly, camera module and electronic equipment - Google Patents
Rotation detection assembly, camera module and electronic equipment Download PDFInfo
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- CN115996316A CN115996316A CN202310288786.0A CN202310288786A CN115996316A CN 115996316 A CN115996316 A CN 115996316A CN 202310288786 A CN202310288786 A CN 202310288786A CN 115996316 A CN115996316 A CN 115996316A
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Abstract
The embodiment of the application relates to the technical field of microelectronics and discloses a rotation detection assembly, a camera module and electronic equipment, wherein the rotation detection assembly comprises a first polar plate, a second polar plate and a detection unit; the first polar plate and the second polar plate are respectively fixed on two parallel detection surfaces with fixed distance of the component to be detected, the opposite surfaces of the first polar plate and the second polar plate are parallel to the two detection surfaces, and when the two detection surfaces translate on the planes of the two detection surfaces, the opposite areas between the first polar plate and the second polar plate are kept unchanged; the detection unit is electrically connected with the first polar plate and the second polar plate respectively and is used for acquiring the capacitance value between the first polar plate and the second polar plate and judging whether relative rotation occurs between the two detection surfaces based on the difference value of the acquired capacitance values in the current state and the initial state. Whether the key component in the precision component rotates or not can be accurately detected based on the rotation detection component, so that the precision component can be ensured to work normally.
Description
Technical Field
The embodiment of the application relates to the technical field of microelectronics, in particular to a rotation detection assembly, a camera module and electronic equipment.
Background
Jitter is a phenomenon that cannot be tolerated but is ubiquitous in precision modules, and any physical collision, even temperature and humidity changes, can cause jitter. Taking the camera module as an example, the image sensor is a core component of the camera module, and can convert the optical signal on the photosensitive surface into an electric signal in a corresponding proportional relation with the optical signal by utilizing the photoelectric conversion function of the photoelectric device, namely, convert the optical image into an electronic signal. The image sensor faces the shake problem, so that most of camera modules on the current electronic equipment are configured with an optical shake prevention function, and the optical shake prevention technology is utilized to compensate the light path during shake, so that the imaging quality of the camera modules is improved.
However, the structural arrangement in the precision modules such as the camera module in the industry can only detect the position of the translation of the key component (such as the image sensor) in the XY plane, but the shake not only includes the translation in the XY plane, but also includes the rotation based on the vertical optical axis (Z axis), and when the key component translates in the XY plane and rotates based on the Z axis at the same time, the rotation based on the Z axis cannot be detected well, thereby affecting the normal operation of the precision module.
Disclosure of Invention
An object of the embodiment of the application is to provide a rotation detection assembly, camera module and electronic equipment, can accurately detect out whether the key part in the precision assembly takes place to rotate to ensure that the precision assembly can normally work.
To solve the above technical problem, an embodiment of the present application provides a rotation detection assembly, including: the device comprises a first polar plate, a second polar plate and a detection unit; the first polar plate and the second polar plate are respectively fixed on two parallel detection surfaces with fixed distance of the component to be detected, the opposite surfaces of the first polar plate and the second polar plate are parallel to the two detection surfaces, and when the two detection surfaces translate in the planes of the two detection surfaces, the opposite areas between the first polar plate and the second polar plate are kept unchanged; the detection unit is electrically connected with the first polar plate and the second polar plate respectively, and is used for acquiring the capacitance value between the first polar plate and the second polar plate and judging whether relative rotation occurs between the two detection surfaces based on the difference value of the acquired capacitance values in the current state and the initial state.
The embodiment of the application also provides a camera module, at least, including base, flexible circuit board, image sensor and above-mentioned rotatory detection component, image sensor sets up on the flexible circuit board, first detection face is the base, the second detection face is the flexible circuit board, detecting element integration is in on the flexible circuit board.
The embodiment of the application also provides electronic equipment, which at least comprises the camera module.
The embodiment of the application provides a rotatory detection component, camera module and electronic equipment, rotatory detection component's first polar plate and second polar plate are fixed respectively on waiting to detect the parallel of subassembly and two detection faces that are fixed apart from, first polar plate and second polar plate's opposite face is parallel with two detection faces, when two detection faces take place the translation at the plane that respectively locates, first polar plate and second polar plate just keep unchanged to the area, rotatory detection component's detecting element is connected with first polar plate and second polar plate electricity respectively for acquire the capacitance value between first polar plate and the second polar plate, and based on the difference of the capacitance value that acquires under current state and the initial state, judge whether take place relative rotation between two detection faces. Considering that the translation of the detection surfaces on the planes of the detection surfaces cannot influence the opposite areas between the first polar plate and the second polar plate, the fact that the capacitance value is not changed is reflected on the capacitance layer, and once the two detection surfaces relatively rotate, the opposite areas between the first polar plate and the second polar plate are changed, the fact that the capacitance value is changed is reflected on the capacitance layer, therefore, whether the key parts in the precise assembly rotate or not can be accurately detected by detecting the capacitance value, and the precise assembly can work normally is guaranteed.
In addition, the first polar plate and the second polar plate are rectangular, the width of the first polar plate is smaller than the length of the second polar plate, and the width of the second polar plate is smaller than the length of the first polar plate. The rectangular polar plate can ensure that the right facing part between the first polar plate and the second polar plate is parallelogram, and the accuracy of rotation detection is further improved.
In addition, the first polar plate is fixed on the first detection surface, the second polar plate is fixed on the second detection surface, the first polar plate and the second polar plate are polar plates provided with hollowed-out rectangles, the width of the hollowed-out rectangles of the first polar plate is smaller than the length of the hollowed-out rectangles of the second polar plate, the width of the hollowed-out rectangles of the second polar plate is smaller than the length of the hollowed-out rectangles of the first polar plate, when no relative translation occurs between the two detection surfaces, the projection of the center of the second polar plate on the first detection surface coincides with the center of the first polar plate, and when relative translation and/or relative rotation occurs between the two detection surfaces, the projection of the edge of the second polar plate on the first detection surface is always within the edge range of the first polar plate.
In addition, the first polar plates are a plurality of, the second polar plates are a plurality of, the first polar plates are arranged on the first detection surface in parallel, the second polar plates are arranged on the second detection surface in parallel, and each second polar plate has a right facing area with each first polar plate. The capacitance signal can be amplified by increasing the number of the polar plates, so that the accuracy of rotation detection is further improved.
In addition, the first polar plate is fixed on a first detection surface, the second polar plate is fixed on a second detection surface, and the first detection surface is fixed on a plane; after determining that the two detection surfaces rotate relatively, the detection unit is further configured to determine a rotation angle corresponding to the second detection surface according to the capacitance value obtained in the current state, the width of the first polar plate, and the width of the second polar plate. After the rotation detection assembly determines that the second detection surface rotates relative to the first detection surface, the rotation angle of the second detection surface can be further determined, so that technical support is provided for subsequent rotation correction, position calibration and the like.
In addition, a gyroscope is arranged in the equipment to which the component to be detected belongs, and the gyroscope is used for acquiring the world rotation angle of the equipment to which the component to be detected belongs; the rotation detection assembly further comprises an acquisition unit and a driving unit, wherein communication connection is established between the acquisition unit and the gyroscope, communication connection is established between the driving unit and the acquisition unit and between the driving unit and the detection unit, and structural connection is arranged between the driving unit and the second detection surface; the acquisition unit is used for acquiring the world rotation angle from the gyroscope; the driving unit is used for driving the second detection surface to rotate according to the world rotation angle so as to enable the second detection surface to rotate relative to the first detection surface; the detection unit is further configured to determine whether a difference between the absolute value of the world rotation angle and the absolute value of the rotation angle corresponding to the second detection surface is zero after determining the rotation angle corresponding to the second detection surface, and send a stop instruction to the driving unit when the difference between the absolute value of the world rotation angle and the absolute value of the rotation angle corresponding to the second detection surface is zero; and the driving unit is also used for stopping driving the second detection surface to reversely rotate after receiving the stopping instruction. When the equipment to which the component to be detected belongs rotates and the whole equipment rotates in the world coordinate system, if the component to be detected needs to work normally, the second detection surface is required not to rotate relative to the world coordinate system, so that the driving unit of the rotating detection component can reversely rotate the second detection surface, and the component to be detected and the equipment to which the component to be detected belong can work normally.
In addition, the detection unit is further configured to send a continuous working instruction to the driving unit when the difference between the absolute value of the world rotation angle and the absolute value of the rotation angle corresponding to the second detection surface is not zero, where the continuous working instruction carries the difference between the absolute value of the world rotation angle and the absolute value of the rotation angle corresponding to the second detection surface; and the driving unit is further used for continuously driving the second detection surface to rotate according to the difference value between the absolute value of the world rotation angle and the absolute value of the rotation angle corresponding to the second detection surface after receiving the continuous working instruction. If the difference between the absolute value of the world rotation angle and the absolute value of the rotation angle corresponding to the second detection surface is not zero, the driving unit is not corrected in place or is overruled, so that the adjustment needs to be continued until the detection unit detects that the difference between the absolute value of the world rotation angle and the absolute value of the rotation angle corresponding to the second detection surface is equal to zero.
In addition, the rotation detection assembly further comprises a driving unit, communication connection is established between the driving unit and the detection unit, and structural connection is arranged between the driving unit and the second detection surface; the driving unit is used for driving the second detection surface to reversely rotate according to the corresponding rotation angle of the second detection surface so as to eliminate the relative rotation between the two detection surfaces. In some scenarios, this rotation is not an allowable jitter, so the relative rotation between the two detection surfaces can be counter-rotated back, thereby eliminating the rotational jitter.
In addition, when no relative rotation occurs between the two detection surfaces, the projection of the second polar plate on the first detection surface is perpendicular to the first polar plate; the driving unit is specifically configured to rotate the second detection surface along a first direction by a rotation angle corresponding to the second detection surface, and send a re-detection instruction to the detection unit; the detection unit is further used for acquiring the capacitance value between the first polar plate and the second polar plate again according to the re-detection instruction, and sending rotation elimination success information to the driving unit under the condition that the acquired capacitance value between the first polar plate and the second polar plate again is equal to the capacitance value acquired in the initial state; the detection unit is further configured to send rotation elimination failure information to the driving unit when the capacitance value between the first electrode plate and the second electrode plate acquired again is not equal to the capacitance value acquired in the initial state; the driving unit is further configured to rotate the second detection surface by a rotation angle corresponding to the second detection surface twice in a second direction opposite to the first direction after receiving the rotation elimination failure information. In the initial state, the projection of the second polar plate on the first detection surface is perpendicular to the first polar plate, and whether the rotation direction of the second polar plate is anticlockwise or clockwise can not be distinguished through the change of the capacitance value, so that the second polar plate is rotated along the first direction first and then rechecked, if the rechecked capacitance value is the same as the initial capacitance value, the rotation of the second detection surface is eliminated, if the rechecked capacitance value is not equal to the initial capacitance value, the first direction rotation error is indicated, and at the moment, the rotation can be eliminated according to the rotation angle corresponding to the second detection surface which rotates twice along the opposite second direction.
In addition, when no relative rotation occurs between the two detection surfaces, the projection of the second plate on the first detection surface forms a preset angle with the first plate, the preset angle is larger than 0 degrees and smaller than 90 degrees, and the maximum rotation angle of the second detection surface is the preset angle rotated in the clockwise direction or the anticlockwise direction; the driving unit is specifically configured to rotate the second detection surface by the rotation angle corresponding to the second detection surface in a clockwise direction when the rotation angle corresponding to the second detection surface is positive, and rotate the second detection surface by the rotation angle corresponding to the second detection surface in a counterclockwise direction when the rotation angle corresponding to the second detection surface is negative. The limitation of the preset angle can ensure that the rotation direction of the second detection surface is cleared, so that the rotation can be eliminated by direct reverse rotation, and the rotation detection efficiency and precision are further improved.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings.
FIG. 1 is a cross-sectional view of a rotation detection assembly provided in one embodiment of the present application;
FIG. 2 is a schematic illustration of a relative positional relationship between a first plate and a second plate of a rotation detection assembly according to one embodiment of the present application;
FIG. 3 is a schematic illustration of a first plate, a second plate, and a positional relationship between the first plate and the second plate of another rotation detection assembly provided in one embodiment of the present application;
FIG. 4 is a schematic illustration of a plurality of first plates, a plurality of second plates, and a positional relationship between each first plate and each second plate of a rotation detection assembly according to one embodiment of the present application;
FIG. 5 is a second cross-sectional view of a rotation detection assembly provided in one embodiment of the present application;
FIG. 6 is a third cross-sectional view of a rotation detection assembly provided in one embodiment of the present application;
fig. 7 is a schematic diagram of a camera module according to another embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, as will be appreciated by those of ordinary skill in the art, in the various embodiments of the present application, numerous technical details have been set forth in order to provide a better understanding of the present application. However, the technical solutions claimed in the present application can be implemented without these technical details and with various changes and modifications based on the following embodiments. The following embodiments are divided for convenience of description, and should not be construed as limiting the specific implementation of the present application, and the embodiments may be mutually combined and referred to without contradiction.
One embodiment of the present application relates to a rotation detection assembly. The following details of implementation of the rotation detecting assembly of the present embodiment are specifically described, and the following details are provided only for facilitating understanding, and are not necessary for implementing the present embodiment. The cross section of the rotation detecting assembly provided in this embodiment may be as shown in fig. 1, and includes a first polar plate 101, a second polar plate 102, and a detecting unit 103, and for convenience of describing the positional relationship, a first detecting surface 201 and a second detecting surface 202 that are used in cooperation with the rotation detecting assembly are also shown in fig. 1.
The first polar plate 101 and the second polar plate 102 are respectively fixed on two parallel and fixed-distance detection surfaces of the component to be detected, the first polar plate 101 is fixed on a first detection surface 201 of the component to be detected, and the second polar plate 102 is fixed on a second detection surface 202 of the component to be detected in the rotating detection component shown in fig. 1. The opposite surfaces of the first polar plate 101 and the second polar plate 102 are parallel to the two detection surfaces, and when the two detection surfaces translate in the plane where the two detection surfaces are located, the opposite surface area between the first polar plate 101 and the second polar plate 102 is kept unchanged.
Specifically, as shown in fig. 2, the relative positional relationship between the first plate and the second plate may be that there is a positive face between the first plate 101 and the second plate 102, that is, there is an overlapping portion between the projection of the second plate 102 on the first detection face and the first plate 101, and the first plate 101 and the second plate 102 generate capacitance by virtue of the positive face therebetween. It will be appreciated that, when the two detection surfaces translate in the respective planes, the facing area between the first polar plate 101 and the second polar plate 102 remains unchanged, and the dashed box in fig. 2 indicates that when the second detection surface translates in the respective planes, the second polar plate 102 translates along with the translation, but the facing area between the second polar plate 102 and the first polar plate 101 before translation and the facing area between the second polar plate 102 and the first polar plate 101 after translation remain unchanged.
In some examples, the first detection surface and the second detection surface can both translate and rotate in a plane.
In some examples, the first detection surface is relatively fixed in its plane, i.e., the first detection surface may not translate or rotate in its plane, but the second detection surface may translate or rotate in its plane.
In some examples, the second detection surface is relatively fixed in its plane, i.e., the first detection surface may not translate or rotate in its plane, but the first detection surface may translate or rotate in its plane.
The detecting unit 103 is electrically connected to the first polar plate 101 and the second polar plate 102, and is configured to obtain a capacitance value between the first polar plate 101 and the second polar plate 102, and determine whether a relative rotation occurs between the two detecting surfaces based on a difference between the capacitance values obtained in the current state and the initial state.
Specifically, the calculation formula of the capacitance is: c=εs/(4πkd), where ε is the dielectric constant, k is the electrostatic force constant, d is the distance between the two plates (which can be considered as the distance between the two detection surfaces), and S is the facing area between the two plates, i.e., since ε and k are fixed, then C is proportional to S with d fixed, and a change in S causes a change in C. The detection unit firstly obtains the capacitance value between the first polar plate and the second polar plate in an initial state, the capacitance value is the initial capacitance value, and at the moment, the first detection surface and the second detection surface are any translational motion and rotation. During detection, the detection unit acquires a capacitance value between the first polar plate and the second polar plate in the current state, the capacitance value is recorded as a current capacitance value, if the current capacitance value is equal to an initial capacitance value, the opposite area between the two detection surfaces is not changed, that is, no relative rotation occurs between the two detection surfaces is indicated, and if the current capacitance value is not equal to the initial capacitance value, the opposite area between the two detection surfaces is changed, that is, the relative rotation occurs between the two detection surfaces is indicated.
In some examples, the detection unit may be integrated in a printed circuit board or a flexible circuit board of the component to be detected.
According to the embodiment, the first polar plate and the second polar plate of the rotation detection assembly are respectively fixed on two parallel detection surfaces with fixed distance of the assembly to be detected, the opposite surfaces of the first polar plate and the second polar plate are parallel to the two detection surfaces, when the two detection surfaces translate on the planes of the two detection surfaces, the opposite areas of the first polar plate and the second polar plate are kept unchanged, the detection units of the rotation detection assembly are respectively electrically connected with the first polar plate and the second polar plate, and the detection units are used for acquiring capacitance values between the first polar plate and the second polar plate and judging whether relative rotation occurs between the two detection surfaces based on the difference value of the capacitance values acquired in the current state and the initial state. Considering that the translation of the detection surfaces on the planes of the detection surfaces cannot influence the opposite areas between the first polar plate and the second polar plate, the fact that the capacitance value is not changed is reflected on the capacitance layer, and once the two detection surfaces relatively rotate, the opposite areas between the first polar plate and the second polar plate are changed, the fact that the capacitance value is changed is reflected on the capacitance layer, therefore, whether the key parts in the precise assembly rotate or not can be accurately detected by detecting the capacitance value, and the precise assembly can work normally is guaranteed.
In one embodiment, the first plate and the second plate may be rectangular as shown in fig. 2, where the first plate 101 and the second plate 102 are each rectangular, and the width of the first plate 101 is smaller than the length of the second plate 102, and the width of the second plate 102 is smaller than the length of the first plate 101. The rectangular polar plate can ensure that the right facing part between the first polar plate and the second polar plate is a parallelogram, and the area, the bottom, the height and the like of the parallelogram are very standard and easy to calculate, so that the accuracy of rotation detection can be further improved.
In one embodiment, the first polar plate, the second polar plate, and the positional relationship between the first polar plate and the second polar plate may be as shown in fig. 3, where the first polar plate is fixed on the first detection surface, the second polar plate is fixed on the second detection surface, the first polar plate and the second polar plate are polar plates with hollowed-out rectangles, the width of the hollowed-out rectangle of the first polar plate is smaller than the length of the hollowed-out rectangle of the second polar plate, the width of the hollowed-out rectangle of the second polar plate is smaller than the length of the hollowed-out rectangle of the first polar plate, when no relative translation occurs between the two detection surfaces, the projection of the center of the second polar plate on the first detection surface coincides with the center of the first polar plate, and when relative translation and/or relative rotation occurs between the two detection surfaces, the projection of the edge of the second polar plate on the first detection surface is always within the edge range of the first polar plate. The first plate and the second plate shown in fig. 3 are both circular.
In some examples, the shapes of the first polar plate and the second polar plate are not limited, and the shape of the first polar plate and the shape of the second polar plate may be different, so long as it is ensured that the projection of the edge of the second polar plate on the first detecting surface is always within the edge range of the first polar plate when the relative translation and/or the relative rotation occurs between the two detecting surfaces, or the projection of the edge of the first polar plate on the second detecting surface is always within the edge range of the second polar plate when the relative translation and/or the relative rotation occurs between the two detecting surfaces.
In one embodiment, the number of first electrode plates is several, the number of second electrode plates is several, and the positional relationship among the number of first electrode plates, the number of second electrode plates, and each first electrode plate and each second electrode plate can be as shown in fig. 4. The first polar plates are arranged on the first detection surface in parallel, the second polar plates are arranged on the second detection surface in parallel, and each second polar plate has a right facing area with each first polar plate. The number of the first polar plates and the second polar plates is increased, so that the right facing area between the polar plates can be increased, namely, capacitance signals are amplified, the change of capacitance values is sensed more accurately, and the rotation detection precision is further improved.
In some examples, the specific number of the first electrode plate and the second electrode plate is not limited, and one first electrode plate and a plurality of second electrode plates may be provided, or a plurality of first electrode plates and one second electrode plate may be provided, or a plurality of first electrode plates and a plurality of second electrode plates may be provided.
In one embodiment, the first polar plate is fixed on the first detection surface, the second polar plate is fixed on the second detection surface, the first detection surface is fixed on the plane, and the detection unit of the rotation detection assembly is further used for determining the rotation angle corresponding to the second detection surface according to the capacitance value acquired in the current state, the width of the first polar plate and the width of the second polar plate after determining that the relative rotation occurs between the two detection surfaces. After the rotation detection assembly determines that the second detection surface rotates relative to the first detection surface, the rotation angle of the second detection surface can be further determined, so that technical support is provided for subsequent rotation correction, pose calibration and the like.
In one example, determining the rotation angle corresponding to the second detection surface may be achieved by the following formula: cosα=εw 1 W 2 /(4π kdC) where W 1 For the width of the first polar plate, W 2 For the width of the second polar plate, epsilon is dielectricThe constant k is an electrostatic force constant, d is the distance between the two polar plates (which can be considered as the distance between the two detection surfaces), C is the capacitance value obtained in the current state, and α is the rotation angle corresponding to the second detection surface.
In one embodiment, the first polar plate of the rotation detection assembly is fixed on the first detection surface, the second polar plate is fixed on the second detection surface, the first detection surface is fixed on a plane, a gyroscope is arranged in the equipment to which the assembly to be detected belongs, the gyroscope is used for acquiring the world rotation angle of the equipment to which the assembly to be detected belongs, the rotation detection assembly is shown in fig. 5 and comprises a first polar plate 101, a second polar plate 102, a detection unit 103, a driving unit 104 and an acquisition unit 105, the first detection surface 201 and the second detection surface 202 which are used in cooperation with the rotation detection assembly are also shown in fig. 5 for describing the position relationship conveniently, and the gyroscope of the equipment to which the assembly to be detected belongs is not shown in fig. 5. A communication connection is established between the acquisition unit 105 and the gyroscope, a communication connection is established between the driving unit 104 and the acquisition unit 105 and between the driving unit 104 and the detection unit 103, and a structural connection is provided between the driving unit 104 and the second detection surface 202.
The acquisition unit 105 is used for acquiring the world rotation angle of the device to which the component to be detected belongs from the gyroscope. The driving unit 104 is configured to drive the second detection surface 202 to rotate according to the world rotation angle, so that the second detection surface 202 rotates relative to the first detection surface 201. The detecting unit 103 is further configured to determine whether a difference between the absolute value of the world rotation angle and the absolute value of the rotation angle corresponding to the second detecting surface 202 is zero after determining the rotation angle corresponding to the second detecting surface 202, and send a stop instruction to the driving unit 104 when the difference between the absolute value of the world rotation angle and the absolute value of the rotation angle corresponding to the second detecting surface 202 is zero. The driving unit 104 is further configured to stop driving the second detection surface 202 to perform the inverse rotation after receiving the stop command.
In some scenes, the device to which the component to be detected belongs rotates, namely the whole device rotates in the world coordinate system, and if the component to be detected needs to work normally, the second detection surface does not rotate relative to the world coordinate system, so that the driving unit of the rotating detection component can reversely rotate the second detection surface, and the component to be detected and the device to which the component to be detected belong can work normally.
In one example, the detecting unit 103 is further configured to send a continuous operation instruction to the driving unit 104, where the difference between the absolute value of the world rotation angle and the absolute value of the rotation angle corresponding to the second detection surface 202 is not zero, where the continuous operation instruction carries the difference between the absolute value of the world rotation angle and the absolute value of the rotation angle corresponding to the second detection surface 202. The driving unit 104 is further configured to continuously drive the second detection surface to rotate according to a difference between the absolute value of the world rotation angle and the absolute value of the rotation angle corresponding to the second detection surface 202 after receiving the continuous operation instruction.
It will be appreciated that if the difference between the absolute value of the world rotation angle and the absolute value of the rotation angle corresponding to the second detection surface is not zero, this indicates that the driving unit is not correcting in place or is overcorrect, and therefore it is necessary to continue the adjustment until the detection unit detects that the difference between the absolute value of the world rotation angle and the absolute value of the rotation angle corresponding to the second detection surface is equal to zero.
In one embodiment, the first polar plate of the rotation detecting assembly is fixed on the first detecting surface, the second polar plate is fixed on the second detecting surface, the first detecting surface is fixed on the plane, the section of the rotation detecting assembly can be shown in fig. 6, and the section of the rotation detecting assembly comprises the first polar plate 101, the second polar plate 102, the detecting unit 103 and the driving unit 104, and for convenience in describing the positional relationship, the first detecting surface 201 and the second detecting surface 202 used in cooperation with the rotation detecting assembly are also shown in fig. 6.
A communication connection is established between the driving unit 104 and the detecting unit 103, and a structural connection is also provided between the driving unit 104 and the second detecting surface 202, where the driving unit 104 is configured to perform inverse rotation on the second detecting surface 202, so as to eliminate relative rotation occurring between the two detecting surfaces.
In practical use, the relative rotation occurring between the two detection surfaces is not allowed to shake, so that the relative rotation between the two detection surfaces can be reversely rotated back, thereby eliminating rotational shake.
In one example, the projection of the second plate onto the first detection surface is perpendicular to the first plate when no relative rotation occurs between the two detection surfaces. The driving unit is specifically configured to rotate the second detection surface along the first direction by a rotation angle corresponding to the second detection surface, and send a re-detection instruction to the detection unit. The detection unit is further configured to acquire a capacitance value between the first electrode plate and the second electrode plate again according to the re-detection instruction, and send rotation elimination success information to the driving unit when the acquired capacitance value between the first electrode plate and the second electrode plate is equal to the capacitance value acquired in the initial state. The detection unit is further used for sending rotation elimination failure information to the driving unit under the condition that the capacitance value between the first polar plate and the second polar plate acquired again is not equal to the capacitance value acquired in the initial state; the driving unit is further used for rotating the second detection surface by a rotation angle corresponding to the second detection surface twice along a second direction opposite to the first direction after receiving the rotation elimination failure information.
In a specific implementation, in an initial state, the projection of the second polar plate on the first detection surface is perpendicular to the first polar plate, and whether the rotation direction of the second polar plate is anticlockwise or clockwise cannot be distinguished through the change of the capacitance value, so that the second polar plate is rotated in the first direction (anticlockwise or clockwise) and rechecked, if the rechecked capacitance value is the same as the initial capacitance value, the rotation of the second detection surface is correct in the first direction, if the rechecked capacitance value is not equal to the initial capacitance value, the rotation error in the first direction is indicated, and at the moment, the rotation angle corresponding to the second detection surface rotated twice in the opposite second direction (clockwise or anticlockwise) can be eliminated.
In some examples, the driving unit may rotate the second plate by a first adjustment angle along the first direction, and send a rechecking instruction to the detecting unit, where the detecting unit is further configured to acquire, according to the rechecking instruction, a capacitance value between the first plate and the second plate again, and send, to the driving unit, information that an adjustment direction is correct when a difference between the capacitance value between the first plate and the second plate acquired again and the capacitance value acquired in an initial state is reduced compared with that before adjustment; the driving unit rotates the second plate by a second adjustment angle along the first direction according to the correct information of the adjustment direction, wherein the second adjustment angle is the difference value between the rotation angle corresponding to the second detection surface and the first adjustment angle; the detection unit is further used for sending an adjustment direction error message to the driving unit when the difference value between the capacitance value between the first polar plate and the second polar plate acquired again and the capacitance value acquired in the initial state is increased; the driving unit is further configured to rotate the second detection surface by a third adjustment angle along a second direction opposite to the first direction after receiving the adjustment direction error information, where the third adjustment angle is a sum of the rotation angles corresponding to the first adjustment angle and the second detection surface, and the first adjustment angle is not suitable to be set too large and may be set to 0.5 °. The rotation direction of the second detection surface can be rapidly determined by carrying out small adjustment, meanwhile, the large adjustment is not carried out before the rotation direction is determined, and the performance of the component to be detected can be better protected.
In one example, when no relative rotation occurs between the two detection surfaces, the projection of the second polar plate on the first detection surface forms a preset angle with the first polar plate, the preset angle is greater than 0 ° and less than 90 °, and the maximum rotation angle of the second detection surface is the preset angle rotated in the clockwise direction or the counterclockwise direction.
The driving unit is specifically configured to rotate the second detection surface by a rotation angle corresponding to the second detection surface in a clockwise direction when the rotation angle corresponding to the second detection surface is positive, and rotate the second detection surface by a rotation angle corresponding to the second detection surface in a counterclockwise direction when the rotation angle corresponding to the second detection surface is negative. The limitation of the preset angle can ensure that the rotation direction of the second detection surface is cleared, so that the rotation can be eliminated by direct reverse rotation, and the rotation detection efficiency and precision are further improved.
It should be noted that, each module involved in this embodiment is a logic module, and in practical application, one logic unit may be one physical unit, or may be a part of one physical unit, or may be implemented by a combination of multiple physical units. In addition, in order to highlight the innovative part of the present application, elements that are not so close to solving the technical problem presented in the present application are not introduced in the present embodiment, but it does not indicate that other elements are not present in the present embodiment.
Another embodiment of the present application relates to a camera module. The implementation details of the camera module of this embodiment are specifically described below, and the following description is merely provided for understanding the implementation details, and is not necessary to implement this embodiment. The camera module provided in this embodiment at least includes a base, a flexible circuit board, an image sensor, and the rotation detection assembly described in the above embodiment. The image sensor is arranged on the flexible circuit board, the first detection surface is the base of the camera module, the second detection surface is the flexible circuit board of the camera module, and the detection unit is integrated on the flexible circuit board.
The camera module may include a base 301 as a first detection surface, a flexible circuit board 302 as a second detection surface, and an image sensor 304 as shown in fig. 7, wherein the whole rotation detection assembly is not shown in fig. 7, but a first polar plate 3031 and a second polar plate 3032 are shown, and the detection unit is integrated on the flexible circuit board 302. Also shown in fig. 7 are a lens 308, a lens holder 305, a motor holder 306, a housing 307, motor pins 309, etc. in the camera module.
It should be noted that, each module involved in this embodiment is a logic module, and in practical application, one logic unit may be one physical unit, or may be a part of one physical unit, or may be implemented by a combination of multiple physical units. In addition, in order to highlight the innovative part of the present application, elements that are not so close to solving the technical problem presented in the present application are not introduced in the present embodiment, but it does not indicate that other elements are not present in the present embodiment.
Another embodiment of the present application relates to an electronic device, which at least includes the camera module set described in the foregoing embodiment.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific embodiments in which the present application is implemented and that various changes in form and details may be made therein without departing from the spirit and scope of the present application.
Claims (12)
1. A rotation detection assembly, comprising: the device comprises a first polar plate, a second polar plate and a detection unit;
the first polar plate and the second polar plate are respectively fixed on two parallel detection surfaces with fixed distance of the component to be detected, the opposite surfaces of the first polar plate and the second polar plate are parallel to the two detection surfaces, and when the two detection surfaces translate in the planes of the two detection surfaces, the opposite areas between the first polar plate and the second polar plate are kept unchanged;
the detection unit is electrically connected with the first polar plate and the second polar plate respectively, and is used for acquiring the capacitance value between the first polar plate and the second polar plate and judging whether relative rotation occurs between the two detection surfaces based on the difference value of the acquired capacitance values in the current state and the initial state.
2. The rotation detection assembly of claim 1, wherein the first plate and the second plate are each rectangular, the first plate having a width that is less than a length of the second plate, the second plate having a width that is less than the length of the first plate.
3. The rotation detection assembly according to claim 1, wherein the first pole plate is fixed on a first detection surface, the second pole plate is fixed on a second detection surface, the first pole plate and the second pole plate are pole plates provided with hollowed rectangles, the hollowed rectangles of the first pole plate are smaller than the hollowed rectangles of the second pole plate in width, the hollowed rectangles of the second pole plate are smaller than the hollowed rectangles of the first pole plate in length, when no relative translation occurs between the two detection surfaces, the projection of the center of the second pole plate on the first detection surface coincides with the center of the first pole plate, and when relative translation and/or relative rotation occurs between the two detection surfaces, the projection of the edge of the second pole plate on the first detection surface is always within the edge range of the first pole plate.
4. The rotation detection assembly of claim 1, wherein the number of first electrode plates is a plurality of second electrode plates, the number of first electrode plates is arranged on the first detection surface in parallel, the number of second electrode plates is arranged on the second detection surface in parallel, and each second electrode plate has a right facing area with each first electrode plate.
5. The rotation detection assembly of claim 2, wherein the first plate is secured to a first detection surface and the second plate is secured to a second detection surface, the first detection surface being secured to a planar surface;
after determining that the two detection surfaces rotate relatively, the detection unit is further configured to determine a rotation angle corresponding to the second detection surface according to the capacitance value obtained in the current state, the width of the first polar plate, and the width of the second polar plate.
6. The rotation detection assembly according to claim 5, wherein a gyroscope is arranged in the equipment to which the assembly to be detected belongs, and the gyroscope is used for acquiring the world rotation angle of the equipment to which the assembly to be detected belongs;
the rotation detection assembly further comprises an acquisition unit and a driving unit, wherein communication connection is established between the acquisition unit and the gyroscope, communication connection is established between the driving unit and the acquisition unit and between the driving unit and the detection unit, and structural connection is arranged between the driving unit and the second detection surface;
the acquisition unit is used for acquiring the world rotation angle from the gyroscope;
the driving unit is used for driving the second detection surface to rotate according to the world rotation angle so as to enable the second detection surface to rotate relative to the first detection surface;
the detection unit is further configured to determine whether a difference between the absolute value of the world rotation angle and the absolute value of the rotation angle corresponding to the second detection surface is zero after determining the rotation angle corresponding to the second detection surface, and send a stop instruction to the driving unit when the difference between the absolute value of the world rotation angle and the absolute value of the rotation angle corresponding to the second detection surface is zero;
and the driving unit is also used for stopping driving the second detection surface to reversely rotate after receiving the stopping instruction.
7. The rotation detection assembly according to claim 6, wherein the detection unit is further configured to send a continuous operation instruction to the driving unit, where a difference between the absolute value of the world rotation angle and the absolute value of the rotation angle corresponding to the second detection surface is not zero, where the continuous operation instruction carries a difference between the absolute value of the world rotation angle and the absolute value of the rotation angle corresponding to the second detection surface;
and the driving unit is further used for continuously driving the second detection surface to rotate according to the difference value between the absolute value of the world rotation angle and the absolute value of the rotation angle corresponding to the second detection surface after receiving the continuous working instruction.
8. The rotation detection assembly of claim 5, further comprising a drive unit, wherein a communication connection is established between the drive unit and the detection unit, and wherein a structural connection is provided between the drive unit and the second detection surface;
the driving unit is used for driving the second detection surface to reversely rotate according to the corresponding rotation angle of the second detection surface so as to eliminate the relative rotation between the two detection surfaces.
9. The rotation detection assembly of claim 8, wherein a projection of the second plate onto the first detection surface is perpendicular to the first plate when no relative rotation occurs between the two detection surfaces;
the driving unit is specifically configured to rotate the second detection surface along a first direction by a rotation angle corresponding to the second detection surface, and send a re-detection instruction to the detection unit;
the detection unit is further used for acquiring the capacitance value between the first polar plate and the second polar plate again according to the re-detection instruction, and sending rotation elimination success information to the driving unit under the condition that the acquired capacitance value between the first polar plate and the second polar plate again is equal to the capacitance value acquired in the initial state;
the detection unit is further configured to send rotation elimination failure information to the driving unit when the capacitance value between the first electrode plate and the second electrode plate acquired again is not equal to the capacitance value acquired in the initial state;
the driving unit is further configured to rotate the second detection surface by a rotation angle corresponding to the second detection surface twice in a second direction opposite to the first direction after receiving the rotation elimination failure information.
10. The rotation detection assembly of claim 8, wherein when no relative rotation occurs between the two detection surfaces, the projection of the second plate onto the first detection surface forms a preset angle with the first plate, the preset angle being greater than 0 ° and less than 90 °, the maximum rotation angle of the second detection surface being rotation in a clockwise or counter-clockwise direction by the preset angle;
the driving unit is specifically configured to rotate the second detection surface by the rotation angle corresponding to the second detection surface in a clockwise direction when the rotation angle corresponding to the second detection surface is positive, and rotate the second detection surface by the rotation angle corresponding to the second detection surface in a counterclockwise direction when the rotation angle corresponding to the second detection surface is negative.
11. A camera module, characterized by comprising at least a base, a flexible circuit board, an image sensor, and a rotation detection assembly according to any one of claims 1 to 10, wherein the image sensor is disposed on the flexible circuit board, the first detection surface is the base, the second detection surface is the flexible circuit board, and the detection unit is integrated on the flexible circuit board.
12. An electronic device comprising at least a camera module according to claim 11.
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| CN202310288786.0A CN115996316B (en) | 2023-03-22 | 2023-03-22 | Rotation detection assembly, camera module and electronic equipment |
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| CN202310288786.0A CN115996316B (en) | 2023-03-22 | 2023-03-22 | Rotation detection assembly, camera module and electronic equipment |
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| CN115996316B (en) | 2023-08-15 |
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