Focusing device and imaging equipment

Abstract

The invention discloses a focusing device and imaging equipment, the focusing device comprises an adjusting assembly, a variable resistance type sensor, a control assembly, a driving assembly and a detector assembly, the adjusting assembly drives the variable resistance type sensor to slide, the control assembly obtains the parameter variation of the variable resistance type sensor, generates a control signal according to the parameter variation, and sends the control signal to the detector assembly; the control signal is sent to the driving assembly; and after receiving the control signal sent by the control assembly, the driving assembly drives the detector assembly to move so as to realize a focusing function. According to the focusing device of the imaging equipment, the parameter variable quantity of the variable resistance type sensor is obtained through the control assembly, the driving assembly is controlled to drive the detector assembly to move according to the parameter variable quantity, and the focusing device of the imaging equipment is simple in structure, high in focusing mode control precision, high in efficiency and convenient to operate.

Description

Technical Field

[0001] The present invention relates to the technical field of imaging equipment, and in particular to a focusing device and an imaging equipment. Background Art

[0002] In order to ensure the best thermal imaging effect and the clearest imaging picture, infrared thermal imager products need to match the corresponding focal length according to the different positions of the object in the field of view to ensure that all details of the observed object can be clearly captured. The infrared thermal imager host needs to support the function of adjusting the focal length to meet the image quality.

[0003] The focusing method of existing handheld infrared thermal imager products is to adopt a structural limit method, which is to achieve the focusing function by twisting the lens assembly to make the lens assembly close to or away from the focal plane of the infrared sensor and changing the image distance; however, this focusing method has a sense of obstruction in the hand feel, and the adjustable range is small. It is also easy to generate scratches and debris when the structural parts are twisted.

[0004] Another focusing method of existing handheld infrared thermal imager products is to use a magnet matched with a Hall sensor, drive the magnet to rotate through a structural part, change the magnetic field above the Hall sensor, and realize the manual focusing function with a software algorithm; this focusing method can greatly improve the hand feel, but due to the introduction of a magnet, an additional magnetic field is introduced, so that magnetic sensitive devices (such as magnetic valve shutters, etc.) cannot be placed around the magnet, otherwise it will affect the normal operation of the magnetic sensitive device, resulting in the problem of limited layout of the magnetic sensitive device. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a focusing device and an imaging device to improve the control accuracy and efficiency of the focusing method.

[0006] In order to solve the above technical problems, the present invention provides a focusing device, comprising:

[0007] Adjustment components, variable resistance sensors, control components, drive components and detector components;

[0008] The adjusting component is connected to the variable resistance sensor and is used to drive the variable resistance sensor to slide;

[0009] The control component is electrically connected to the variable resistance sensor and the driving component respectively, and is used to obtain the parameter change of the variable resistance sensor, generate a control signal according to the parameter change, and send the control signal to the driving component;

[0010] The driving component is connected to the detector component and is used to receive a control signal sent by the control component to drive the detector component to move.

[0011] Preferably, the adjustment assembly includes a focus ring, a rotating shaft and a transmission shaft, and the transmission shaft is connected to the variable resistance sensor to drive the variable resistance sensor to slide.

[0012] Preferably, the focus ring is connected to the rotating shaft, and the rotating shaft is connected to the transmission shaft.

[0013] Preferably, a sealing ring is provided between the focus ring and the transmission shaft.

[0014] Preferably, the variable resistance sensor comprises a resistance element and a brush, and the transmission shaft is connected to the brush;

[0015] The adjusting component drives the variable resistance sensor to slide specifically in that the transmission shaft drives the brush to rotate relative to the resistance element.

[0016] Preferably, the control component is further used to determine the rotation direction and / or rotation angle of the focus ring according to the acquired parameter change amount.

[0017] Preferably, the control component includes an acquisition module and a main control chip. The acquisition module is electrically connected to the variable resistance sensor and is used to acquire parameter changes of the variable resistance sensor and send the parameter changes to the main control chip. The main control chip is used to generate control instructions.

[0018] Preferably, the parameter is a voltage value or a resistance value.

[0019] Preferably, the focusing device further comprises a lens assembly;

[0020] Specifically, the driving component drives the detector component to move: the driving component drives the detector component to move closer to / away from the lens component.

[0021] The invention also provides an imaging device, comprising a shell, wherein the focusing device is placed in the shell.

[0022] The implementation of the present invention has the following beneficial effects: the focusing device of the present invention has a simple structure, a high control precision of the focusing method, high efficiency and convenient operation, which overcomes the problem of the poor focusing feel of the lens assembly in the prior art, and also avoids the problem of the layout of the magnetic sensitive device being limited by the use of the Hall sensor supporting magnet, and does not require the introduction of additional electrical signals, further improving the product reliability. The focusing device in the present invention can also determine the rotation direction and / or rotation angle of the focusing ring of the adjustment component according to the parameter change of the variable resistance sensor, further improving the precision and efficiency of the focusing method, thereby improving the product reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 The present invention is a structural block diagram of a focusing device according to an embodiment of the present invention.

[0025] Figure 2 The figure is a schematic diagram of the overall structure of an imaging device according to the second embodiment of the present invention.

[0026] Figure 3 Schematic cross-sectional view of a focusing device in an embodiment of the present invention.

[0027] The figures are marked as follows: 1. adjustment component; 101. focusing ring; 102. rotating shaft; 103. transmission shaft; 104. sealing ring; 2. variable resistance sensor; 3. control device; 301. main control chip; 302. acquisition module; 4. driving component; 5. detector component; 6. lens component; 7. housing. DETAILED DESCRIPTION

[0028] The following descriptions of the embodiments are with reference to the accompanying drawings to illustrate specific embodiments in which the present invention can be implemented. In the description of the present invention, it should be understood that the terms "longitudinal", "length", "circumferential", "front", "rear", "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0029] Please refer to Figure 1 As shown, the first embodiment of the present invention provides a focusing device, comprising: an adjustment component 1, a variable resistance sensor 2, a control component 3, a driving component 4 and a detector component 5;

[0030] The adjustment component 1 is connected to the variable resistance sensor 2 and is used to drive the variable resistance sensor 2 to slide. The variable resistance sensor 2 has initial parameters.

[0031] The control component 3 is connected to the variable resistance sensor 2 and the driving component 4, respectively, and is used to detect the real-time parameters of the variable resistance sensor 2, generate a control signal according to the initial parameters and the real-time parameters, and send the control signal to the driving component 4;

[0032] The driving component 4 is connected to the detector component 5 and is used to receive the control signal sent by the control component 3 to drive the detector component 5 to move.

[0033] The focusing device of this embodiment obtains the parameter change of the variable resistance sensor 2 through the control component 3, and controls the driving component 4 to drive the movement of the detector component 5 according to the parameter change. The focusing device has a simple structure, high control accuracy of the focusing method, high efficiency and easy operation.

[0034] As an implementation manner, the adjustment component 1 includes a focus ring 101, a rotating shaft 102 and a transmission shaft 103, and the rotating shaft 102 is respectively connected to the focus ring 101 and the transmission shaft 103; specifically, the rotation of the focus ring 101 drives the rotating shaft 102 to rotate, and the rotating shaft 102 drives the transmission shaft 103 to rotate.

[0035] Preferably, the focus ring 101 is connected to the rotating shaft 102 through a transmission gear set. When the focus ring 101 rotates, the rotating shaft 102 is driven to rotate through the transmission gear set; the rotating shaft 102 is inserted into the transmission shaft 103. When the rotating shaft 102 rotates, it drives the transmission shaft 103 to rotate.

[0036] As an implementation mode, the transmission shaft 103 is connected to the variable resistance sensor 2, and the rotation of the transmission shaft 103 drives the variable resistance sensor 2 to slide; wherein the transmission shaft 103 is inserted into the variable resistance sensor 2, the variable resistance sensor 2 is an angular displacement variable resistance sensor, including a resistor element and a brush, the brush rotates relative to the resistor element, thereby realizing that the real-time parameters of the variable resistance sensor 2 change with the angle of the brush; specifically, the transmission shaft 103 is connected to the brush, and the rotation of the transmission shaft 103 drives the brush to rotate relative to the resistor element.

[0037] As an implementation manner, a sealing ring 104 is provided between the focus ring 101 and the transmission shaft 103 . Specifically, the sealing ring 104 is an O-ring made of rubber or silicone and is mainly used for static sealing, reciprocating sealing and sliding sealing between the focus ring 101 and the transmission shaft 103 .

[0038] As an implementation mode, the control component 3 is electrically connected to the variable resistance sensor 2, and the control component 3 specifically includes an acquisition module 301 and a main control chip 302. Specifically, the acquisition module 301 is electrically connected to the variable resistance sensor 2, and is used to obtain the parameter change of the variable resistance sensor 2, convert the analog signal of the parameter change into a digital signal and send it to the main control chip 302; the main control chip 302 is used to obtain the parameter change of the variable resistance sensor 2 and generate a control signal.

[0039] Preferably, the acquisition module 301 is an analog-to-digital converter, and the main control chip 302 is an ARM chip or an FPGA chip. The analog-to-digital converter communicates with the ARM chip or the FPGA chip through the IIC protocol.

[0040] As an implementation mode, the acquisition module 301 of the control component 3 acquires the last parameter and the current real-time parameter of the variable resistance sensor 2, and obtains the parameter change of the variable resistance sensor 2 by comparing the last parameter and the current real-time parameter; further, the acquisition module 301 converts the analog signal of the parameter change into a digital signal, and sends it to the main control chip 302; the main control chip recognizes the digital signal sent by the acquisition module 301, acquires the parameter change of the variable resistance sensor 2, and generates a control signal.

[0041] As an implementation mode, the above parameter is a resistance value or a voltage value.

[0042] Preferably, the main control chip 3 of the control component 3 can also determine the rotation direction of the variable resistance sensor 2 and the rotation direction of the focus ring 101 according to the acquired parameter change of the variable resistance sensor 2. For example: if the resistance value or voltage value of the variable resistance sensor 2 decreases, it is determined that the focus ring 101 rotates to the right, and if the resistance value or voltage value of the variable resistance sensor 2 increases, it is determined that the focus ring 101 rotates to the left; or if the resistance value or voltage value of the variable resistance sensor 2 increases, it is determined that the focus ring 101 rotates to the left, and if the resistance value or voltage value of the variable resistance sensor 2 increases, it is determined that the focus ring 101 rotates to the right.

[0043] Preferably, the main control chip 3 of the control component 3 can also determine the rotation angle of the variable resistance sensor 2 and the rotation angle of the focus ring 101 according to the acquired parameter change of the variable resistance sensor 2. For example: the range of the variable resistance sensor 2 is 0-100Ω, the rotation angle is 0-240°, and the resistance change of the variable resistance sensor 2 is determined to be 20Ω according to the acquired parameter change. Then, according to the range, rotation angle and resistance change of the variable resistance sensor 2, it is determined that the focus ring 101 rotates 48°; the above example is only for explanation and does not have a limiting effect. Those skilled in the art can set the range of the variable resistance sensor and select the angle according to actual conditions.

[0044] The focusing device of the present invention determines the rotation direction and / or rotation angle of the focusing ring 101 of the adjustment component 1 according to the parameter change of the variable resistance sensor 2, further improving the accuracy and efficiency of the focusing method, thereby improving product reliability.

[0045] As an implementation mode, the control component 3 is electrically connected to the driving component 4 to send the generated control signal to the driving component 4 . Specifically, the main control chip 302 is electrically connected to the driving component 4 to send the control signal to the driving component 4 .

[0046] As an implementation manner, the driving component 4 is connected to the detector component 5. Specifically, the driving component 4 receives a control signal sent by the control component 3 to drive the detector component 5 to move.

[0047] Preferably, the driving component 4 can be a motor.

[0048] Preferably, the detector assembly 5 may be an infrared detector or other types of detectors, which are not limited here.

[0049] See also Figure 2 and Figure 3 , this embodiment provides a schematic diagram of a cross-sectional structure of a focusing device, the focusing device further includes a lens assembly 6, there is a certain distance between the detector assembly 5 and the lens assembly 6, the driving assembly 4 drives the detector assembly 5 to move, specifically, the driving assembly 4 drives the detector assembly 5 to approach / move away from the lens assembly;

[0050] Preferably, the lens assembly 6 may be an infrared lens, or may be other types of lenses such as a visible light lens, which is not limited here.

[0051] As an implementation manner, the focusing device further includes a lens barrel, and the lens assembly 6 is disposed in the lens barrel.

[0052] Embodiment 2 of the present invention further provides an imaging device, which includes a shell 7 and the focusing device in the above embodiment. Other components of the imaging device are all existing technologies in the field and will not be repeated here. Specifically, a focusing device is placed in the shell 7, and the imaging device is a handheld infrared thermal imager.

[0053] The user can manually focus the imaging device by rotating the focus ring 101 of the adjustment device 1 in the imaging device, and the focus scheme can be selected according to the actual situation. The specific manual focus complete process is as follows:

[0054] When the user rotates the focus ring 101 to the right, the focus ring 101 drives the rotating shaft 102 to rotate to the right, and the rotating shaft 102 drives the transmission shaft 103 inserted into the variable resistance sensor 2 to move to the right, and the transmission shaft 103 drives the brush of the variable resistance sensor 2 to rotate to the right relative to the resistance element, causing the resistance value of the variable resistance sensor to decrease. The acquisition module 301 of the control device 3 obtains that the voltage value or resistance value of the variable resistance sensor 2 decreases, and converts the analog signal of the decrease in the voltage value or resistance value of the variable resistance sensor 2 into a digital signal and sends it to the main control chip 302 of the control device 3. The main control chip 302 recognizes that the resistance value of the variable resistance sensor decreases according to the acquired digital signal, and determines that the user rotates the focus ring 101 to the right and the focal length needs to be extended, so a signal control instruction is generated for the detector component 5 to approach the lens component 6 and is sent to the drive component 4. After obtaining the signal control instruction, the drive component 4 drives the detector component 5 to approach the lens component 6 to complete the focusing process of the imaging device.

[0055] When the user rotates the focus ring 101 to the left, the focus ring 101 drives the rotating shaft 102 to rotate to the left, and the rotating shaft 102 drives the transmission shaft 103 inserted into the variable resistance sensor 2 to move to the right, and the transmission shaft 103 drives the brush of the variable resistance sensor 2 to rotate to the left relative to the resistance element, causing the resistance value of the variable resistance sensor to increase. The acquisition module 301 of the control device 3 obtains that the voltage value or resistance value of the variable resistance sensor 2 increases, and converts the analog signal of the increase in the voltage value or resistance value of the variable resistance sensor 2 into a digital signal and sends it to the main control chip 302 of the control device 3. The main control chip 302 recognizes that the resistance value of the variable resistance sensor increases according to the acquired digital signal, and determines that the user rotates the focus ring 101 to the left and the focus needs to be shortened. Therefore, a signal control instruction is generated to move the detector assembly 5 away from the lens assembly 6 and is sent to the drive assembly 4. After obtaining the signal control instruction, the drive assembly 4 drives the detector assembly 5 away from the lens assembly 6 to complete the focusing process of the imaging device.

[0056] When the user rotates the focus ring 101 to the right, the focus ring 101 drives the rotating shaft 102 to rotate to the right, and the rotating shaft 102 drives the transmission shaft 103 inserted into the variable resistance sensor 2 to move to the right, and the transmission shaft 103 drives the brush of the variable resistance sensor 2 to rotate to the right relative to the resistance element, causing the resistance value of the variable resistance sensor to increase. The acquisition module 301 of the control device 3 obtains that the voltage value or resistance value of the variable resistance sensor 2 increases, and converts the analog signal of the increase in the voltage value or resistance value of the variable resistance sensor 2 into a digital signal and sends it to the main control chip 302 of the control device 3. The main control chip 302 recognizes that the resistance value of the variable resistance sensor increases according to the acquired digital signal, and determines that the user rotates the focus ring 101 to the right and the focal length needs to be extended, so a signal control instruction is generated for the detector component 5 to approach the lens component 6 and is sent to the drive component 4. After obtaining the signal control instruction, the drive component 4 drives the detector component 5 to approach the lens component 6 to complete the focusing process of the imaging device.

[0057] When the user rotates the focus ring 101 to the left, the focus ring 101 drives the rotating shaft 102 to rotate to the left, and the rotating shaft 102 drives the transmission shaft 103 inserted into the variable resistance sensor 2 to move to the right, and the transmission shaft 103 drives the brush of the variable resistance sensor 2 to rotate to the left relative to the resistance element, causing the resistance value of the variable resistance sensor to decrease. The acquisition module 301 of the control device 3 obtains that the voltage value or resistance value of the variable resistance sensor 2 decreases, and converts the analog signal of the decrease in the voltage value or resistance value of the variable resistance sensor 2 into a digital signal and sends it to the main control chip 302 of the control device 3. The main control chip 302 recognizes that the resistance value of the variable resistance sensor decreases according to the acquired digital signal, and determines that the user rotates the focus ring 101 to the left and the focus needs to be shortened. Therefore, a signal control instruction is generated to move the detector assembly 5 away from the lens assembly 6 and is sent to the drive assembly 4. After obtaining the signal control instruction, the drive assembly 4 drives the detector assembly 5 away from the lens assembly 6 to complete the focusing process of the imaging device.

[0058] The focusing device in the present invention comprises an adjusting component 1, a variable resistance sensor 2, a control component 3 and a driving component 4. The parameter change of the variable resistance sensor is obtained by the control component 4, and the driving component 4 is controlled according to the parameter change to drive the movement of the detector component 5. The focusing device of the imaging device of the present invention has a simple structure, a high control accuracy of the focusing method, high efficiency and convenient operation, which overcomes the problem of extremely poor focusing feel of the lens in the prior art, and also avoids the problem of limited layout of magnetic sensitive devices caused by the use of Hall sensor matching magnets, and does not need to introduce additional electrical signals, thereby further improving product reliability.

[0059] Furthermore, the focusing device in the present invention can also determine the rotation direction and / or rotation angle of the focusing ring 101 of the adjustment component 1 according to the parameter change of the variable resistance sensor 2, thereby further improving the accuracy and efficiency of the focusing method, thereby improving product reliability.

[0060] It can be seen from the above description that compared with the prior art, the beneficial effects brought by the embodiments of the present invention are: the focusing device of the present invention has a simple structure, a high control precision of the focusing method, high efficiency and convenient operation, which overcomes the problem of the extremely poor focusing feel of the lens assembly in the prior art, and also avoids the problem of the layout of the magnetic sensitive device being limited by the use of the Hall sensor supporting magnet, and does not require the introduction of additional electrical signals, further improving the product reliability. The focusing device in the present invention can also determine the rotation direction and / or rotation angle of the focusing ring of the adjustment component according to the parameter change of the variable resistance sensor, further improving the accuracy and efficiency of the focusing method, thereby improving the product reliability.

[0061] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A focusing device, characterized in that: include: Adjustment components, variable resistance sensors, control components, drive components and detector components; The adjusting component is connected to the variable resistance sensor and is used to drive the variable resistance sensor to slide; The control component is electrically connected to the variable resistance sensor and the driving component respectively, and is used to obtain the parameter change of the variable resistance sensor, generate a control signal according to the parameter change, and send the control signal to the driving component; The driving component is connected to the detector component and is used to receive a control signal sent by the control component to drive the detector component to move.

2. The focusing device according to claim 1, characterized in that: The adjustment component includes a focus ring, a rotating shaft and a transmission shaft. The transmission shaft is connected to the variable resistance sensor and is used to drive the variable resistance sensor to slide.

3. The focusing device according to claim 2, characterized in that: The focus ring is connected to the rotating shaft, and the rotating shaft is connected to the transmission shaft.

4. The focusing device according to claim 3, characterized in that: A sealing ring is arranged between the focusing ring and the transmission shaft.

5. The focusing device according to claim 2, characterized in that: The variable resistance sensor includes a resistance element and a brush, and the transmission shaft is connected to the brush; The adjusting component drives the variable resistance sensor to slide specifically in that the transmission shaft drives the brush to rotate relative to the resistance element.

6. The focusing device according to claim 5, characterized in that: The control component is also used to determine the rotation direction and / or rotation angle of the focus ring according to the acquired parameter variation.

7. The focusing device according to claim 1, characterized in that: The control component includes an acquisition module and a main control chip. The acquisition module is electrically connected to the variable resistance sensor and is used to acquire the parameter change of the variable resistance sensor and send the parameter change to the main control chip. The main control chip is used to generate control instructions.

8. The focusing device according to any one of claims 1 to 7, characterized in that: The parameter is a voltage value or a resistance value.

9. The focusing device according to claim 1, characterized in that: Also included is a lens assembly; Specifically, the driving component drives the detector component to move: the driving component drives the detector component to move closer to / away from the lens component.

10. An imaging device, characterized in that: It comprises a shell, in which the focusing device according to any one of claims 1 to 9 is placed.

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