CN211378160U - Device for testing exposure time of camera equipment - Google Patents
Device for testing exposure time of camera equipment Download PDFInfo
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- CN211378160U CN211378160U CN201921280538.7U CN201921280538U CN211378160U CN 211378160 U CN211378160 U CN 211378160U CN 201921280538 U CN201921280538 U CN 201921280538U CN 211378160 U CN211378160 U CN 211378160U
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Abstract
The embodiment of the utility model provides a test camera equipment exposure time's device, include: the rotary table with the motor is characterized in that a pointer is fixed at the center of the rotary table, a 360-degree angle scale is arranged on the periphery of one surface of the rotary table, which is used for fixing the pointer, and the center of the 360-degree angle scale is concentric with the center of the rotary table; when the exposure time of the camera equipment is tested, the motor is started, the turntable is driven by the motor to rotate according to the preset rotating speed of the motor, the camera equipment shoots image data comprising the pointer, the turntable and the angle scale, and the exposure time of the camera equipment is determined according to the sector smear angle of the pointer shot in the image data. The testing device has the advantages of simple layout when testing, high precision of exposure time detection technology, high flexibility, simplicity, small system building difficulty, easy and convenient maintenance, and easy replacement of parts to be maintained.
Description
Technical Field
The utility model relates to a field of making a video recording especially relates to a test camera equipment exposure time's device.
Background
In the field of image pickup, an image pickup device automatically controls the exposure length of a photosensitive element through an algorithm by detecting the brightness condition of an actual shooting scene. If the actual exposure length of the photosensitive element is detected, a detection tool and method are required to detect and confirm the exposure time of the image pickup apparatus. In the debugging process of the automatic exposure algorithm, the exposure time of a plurality of camera devices needs to be tested and confirmed.
One of the existing exposure time detection techniques is to use an LED array to light up LEDs on the array one by one, and a camera device takes an image of the LED array, and calculates the exposure time of the camera device by checking the number of the lighted LEDs on the image and combining the lighting frequency of the LEDs. Another technique is to project the light of a point light source onto a reflecting plate by using two sets of rotating reflecting mirrors, and calculate the exposure time of the image pickup apparatus by combining the number of bright lines on the imaging reflecting plate of the imaging device and the rotating speed of the reflecting mirrors. The existing exposure time detection technology has the defects of low precision, poor flexibility, complex device, high device building difficulty, simple and crude mode and low precision.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a test camera equipment exposure time's device for improve exposure time and detect technical precision, flexibility.
The embodiment of the utility model provides a test camera equipment exposure time's device, include: the rotary table with the motor is characterized in that a pointer is fixed at the center of the rotary table, a 360-degree angle scale is arranged on the periphery of one surface of the rotary table, which is used for fixing the pointer, and the center of the 360-degree angle scale is concentric with the center of the rotary table; when the exposure time of the camera equipment is tested, the motor is started, the turntable is driven by the motor to rotate according to the preset rotating speed of the motor, the camera equipment shoots image data comprising the pointer, the turntable and the angle scale, and the exposure time of the camera equipment is determined according to the sector smear angle of the pointer shot in the image data.
Optionally, the device still includes the carousel cover, the periphery of carousel cover sets up 360 degrees angle scales, the carousel is established through the cover the carousel cover, with the carousel is fixed the periphery of the one side of pointer is fixed to be set up 360 degrees angle scales.
Optionally, the device still includes angle scale mounting, 360 degrees angle scales pass through angle scale mounting fixed connection in the carousel is fixed the periphery of the one side of pointer.
Optionally, the motor is a constant-speed rotating motor, and a rotating shaft of the motor is correspondingly installed in the center of the turntable.
Optionally, the motor is a constant-speed rotation motor with an adjustable rotation speed, when the fan-shaped smear angle is smaller than 180 degrees, the rotation speed of the motor is increased to a first target rotation speed, the first target rotation speed is a rotation speed at which the fan-shaped smear angle of the pointer in image data shot by the camera after the rotation speed of the motor is increased is greater than 180 degrees and smaller than 360 degrees, and the exposure time of the camera is determined according to the fan-shaped smear angle of the pointer in the image data shot by the camera when the motor works at the first target rotation speed.
Optionally, the motor is a constant-speed rotation motor with an adjustable rotation speed, when the fan-shaped smear angle is greater than 360 degrees, the rotation speed of the motor is reduced to a second target rotation speed, the second target rotation speed is a rotation speed at which the fan-shaped smear angle of the pointer in image data shot by the camera after the rotation speed of the motor is reduced is greater than 180 degrees and less than 360 degrees, so that the exposure time of the camera is determined according to the fan-shaped smear angle of the pointer in the image data shot by the camera when the motor works at the second target rotation speed.
Optionally, the motor is a constant-speed rotation motor with an adjustable rotation speed, when the fan-shaped smear angle is smaller than 180 degrees, the rotation speed of the motor is increased to a plurality of third target rotation speeds, each third target rotation speed is a rotation speed when the fan-shaped smear angle of the pointer in image data shot by the image pickup device after the rotation speed of the motor is increased to be greater than 180 degrees and smaller than 360 degrees, exposure time of the image pickup device is determined for each fan-shaped smear angle of the pointer in each image data shot by the image pickup device when the motor works at each third target rotation speed respectively, so as to obtain a plurality of exposure times corresponding to all the third target rotation speeds, and a mean value algorithm is used for the plurality of exposure times to determine a mean value exposure time as a standard exposure time of the image pickup device.
Optionally, at least half of all the third target rotation speed sets are different target rotation speeds.
Optionally, the motor is a constant-speed rotation motor with an adjustable rotation speed, when the fan-shaped smear angle is greater than 360 degrees, the rotation speed of the motor is reduced to a plurality of fourth target rotation speeds, each fourth target rotation speed is a rotation speed at which the fan-shaped smear angle of the pointer in image data captured by the image capture device after the rotation speed of the motor is reduced is greater than 180 degrees and less than 360 degrees, exposure time of the image capture device is determined for each fan-shaped smear angle of the pointer in each image data captured by the image capture device when the motor works at each fourth target rotation speed respectively, so as to obtain a plurality of exposure times corresponding to all fourth target rotation speeds, and a mean value algorithm is used for the plurality of exposure times to determine a mean value exposure time as a standard exposure time of the image capture device.
Optionally, at least half of all the fourth target rotation speed sets are different target rotation speeds.
Optionally, the diameter of the turntable is greater than 10 cm.
Optionally, the diameter of the angle scale is greater than 10 cm.
Optionally, the turntable is a circular turntable, and the length of the pointer is the radius of the circular turntable.
Optionally, the color difference between one surface of the pointer and one surface of the pointer opposite to the turntable is set to be greater than a preset value by the turntable.
Optionally, the carousel sets up the one side of pointer is white, the pointer dorsad the one side of carousel is black.
Optionally, one end of the pointer pointing to the periphery of the turntable is an isosceles triangle, and the vertex angle of the isosceles triangle of the end of the pointer pointing to the periphery of the turntable is located on the periphery of the turntable.
Optionally, one end of the pointer facing the center of the turntable is an isosceles triangle, and a vertex angle of the isosceles triangle at one end of the pointer facing the center of the turntable is located at the center of the turntable.
Optionally, the length of the base of all isosceles triangles is greater than or equal to 3 times the width of the pointer.
Optionally, all isosceles triangles are equilateral triangles.
According to the technical solution provided by the utility model, the embodiment of the utility model has the following advantage:
the embodiment of the utility model provides a test camera equipment exposure time's device, include: the rotary table with the motor is characterized in that a pointer is fixed at the center of the rotary table, a 360-degree angle scale is arranged on the periphery of one surface of the rotary table, which is used for fixing the pointer, and the center of the 360-degree angle scale is concentric with the center of the rotary table; when the exposure time of the camera equipment is tested, the motor is started, the turntable is driven by the motor to rotate according to the preset rotating speed of the motor, the camera equipment shoots image data comprising the pointer, the turntable and the angle scale, and the exposure time of the camera equipment is determined according to the sector smear angle of the pointer shot in the image data. The testing device has the advantages of simple layout when testing, high precision of exposure time detection technology, high flexibility, simplicity, small difficulty in building the device, easiness and convenience in maintenance, and easiness in replacing parts to be maintained.
Drawings
Fig. 1 is a system structure diagram for testing exposure time of a camera device according to an embodiment of the present invention;
fig. 2 is a structural diagram of an apparatus for testing exposure time of a camera according to another embodiment of the present invention;
fig. 3 is a schematic view of a turntable and an angle scale according to another embodiment of the present invention;
fig. 4 is a schematic view of an angular scale precision according to another embodiment of the present invention;
fig. 5 is a schematic view of a sector angle swept by an exposure time indicator according to another embodiment of the present invention.
Detailed Description
The embodiment of the utility model provides a test camera equipment exposure time's device for improve exposure time and detect technical precision, flexibility.
The embodiment of the utility model provides a test camera equipment exposure time's device is applied to in the system of the test camera equipment exposure time shown in figure 1. As shown in fig. 1, the test system includes: a test apparatus 1 and an image pickup apparatus 2. As shown in fig. 2, the testing apparatus 1 includes a turntable 12 with a motor 11, a pointer 121 is fixed at the center of the turntable 12, an angle scale 122 of 360 degrees is provided on the periphery of one surface of the turntable 12 on which the pointer 121 is fixed, and the center of the angle scale 122 of 360 degrees is concentric with the center of the turntable 12; when the exposure time of the image pickup apparatus 2 is tested, the motor 11 is started, the motor 11 drives the turntable 12 to rotate according to the preset rotating speed of the motor 11, and then the image pickup apparatus 2 shoots image data including the pointer 121, the turntable 12 and the angle scale 122, so that the exposure time of the image pickup apparatus 2 is determined according to the fan-shaped smear angle of the pointer 121 shot in the image data.
In the scheme, the equipment and tools used by the device are simple, and the rotating disc 12 with the pointer 121 and the angle scale 122 can be manufactured by themselves. In addition, in the test process, the camera device 2 only needs to shoot towards the direction of the turntable, and the smear and the scale of the pointer 121 of the turntable 12 are shot clearly, so that the requirement for placing the device is reduced.
The embodiment of the utility model provides an in, camera equipment 2 is as long as shoot towards carousel 12 direction to can clap carousel 12 and angle scale 122 completely, through looking over the scale that carousel 12 pointer 121 top indicates, just can accurately read out fan-shaped smear both sides to the biggest scale and minimum scale. In other embodiments, the camera device 2 does not vertically shoot at the center of the turntable 12, and does not affect the reading of the scale values on both sides of the fan-shaped smear. Therefore, the construction requirement on the test system is greatly reduced, and the test efficiency is greatly improved.
As shown in fig. 3, the rotary disk 12 provided in the present embodiment is circular, and the pointer 121 is a radius of the rotary disk 12. The pointer 121 is used to form a fan-shaped shadow as the turntable 12 rotates during exposure for shooting by the image pickup apparatus 2. To increase the color depth of the fan-shaped shadow, the circular turntable is white ground, while the width of the pointer 121 is larger than the length of the pointer 1/20, the pointer being dark, preferably black. To improve the accuracy of measuring the angle of the fan-shaped shadow, the pointer 121 points to the center of the circle and the two ends of the circle and an isosceles triangle is used. The vertex angle of the isosceles triangle near one end of the circle center is on the circle center, and the bottom edge points to the direction of the circular edge along the pointer 121; the vertex angle of the isosceles triangle near the circle falls on the circle, and the bottom edge points to the direction of the circle center along the pointer 121. Preferably, the length of the base of the isosceles triangles is greater than 3 times the width of the pointer 121. Preferably, the isosceles triangle uses an equilateral triangle. The turntable 12 is mounted on a constant speed motor 11. The center of the rotary table is arranged over against the center of the rotating shaft of the motor 11.
Optionally, the turntable 12 is detachably connected to the motor 11.
Optionally, the angular scale 122 is detachably connected to the turntable 12.
Optionally, the testing apparatus 1 includes a turntable sleeve, the periphery of the turntable sleeve is provided with the 360-degree angle scale 122, the turntable 12 is provided with the turntable sleeve through a sleeve, so that the turntable 12 fixes the periphery of one surface of the pointer 121 is fixedly provided with the 360-degree angle scale 122.
Optionally, the testing device 1 includes an angle scale fixing member, and the 360-degree angle scale 122 is fixedly connected to the periphery of the surface of the turntable 12, on which the pointer 121 is fixed, through the angle scale fixing member.
Optionally, the motor 11 is a constant-speed rotating motor 11, and a rotating shaft of the motor 11 is correspondingly installed in the center of the turntable 12. The embodiment of the utility model provides an in, through constant speed motor, take pointer carousel and 360 degrees testing arrangement that the angle scale constitutes, it is very simple to build, has solved the complicated problem of current exposure time test system structure.
Optionally, the motor 11 is a constant-speed rotating motor 11 with an adjustable rotating speed. The embodiment of the utility model provides an in, in the test environment was put to motor 11 of having adorned carousel 12, motor 11 position was motionless, and ambient light illumination remains stable, and camera equipment 2 openly places towards carousel 12. After the rotation of the turntable 12 is stabilized, the turntable 12 is photographed by the image pickup apparatus 2.
Optionally, when the motor 11 is a constant-speed rotating motor 11 with an adjustable rotating speed, the rotating speed of the motor 11 can be adjusted through a manual adjusting device arranged on the motor 11 and through manual adjustment of a tester.
Optionally, when the motor 11 is a constant-speed rotating motor 11 with an adjustable rotating speed, the rotating speed of the motor 11 can be automatically adjusted by adjusting a program set by the motor 11 through an automatic adjusting device set by the motor 11 according to the fan-shaped smear angle manually input by a tester. In this embodiment, the target value of the rotation speed may be automatically adjusted with reference to the following alternative examples.
In the testing device, the scale of the 360-degree angle scale 122 is exposed on the periphery of the outer edge of the turntable 12, and the center of the circle towards which the scale faces is concentric with the center of the turntable 12. The angle scale 122 is fixed and cannot rotate or move during the test. Preferably, the angle scale 122 is a disk slightly larger than the turntable 12. As shown in fig. 4, the scales of the angle scale 122 are uniformly distributed outwards in the outer edge of the turntable 12, and the scales are clear enough so that the arrows of the turntable pointer 121, i.e. the scale values of the angle scale 122 pointed by the two sides of the fan-shaped smear, can be clearly distinguished in the shot image by the camera device 2.
Optionally, in the embodiment of the present invention, the test accuracy of the exposure time can be improved by the following three methods:
the method comprises the following steps that in the first mode, a motor 11 with high rotating speed precision and good rotating speed stability is selected;
in the second mode, the diameters of the turntable 12 and the angle scale 122 are increased to improve the accuracy of the scale of the angle scale 122. The embodiment of the utility model provides an in, can solve the problem that current exposure time test result precision is low through the mode of utilizing the carousel of big radius and scale.
And thirdly, performing multiple tests, and taking the average value of the exposure time.
As shown in fig. 5, for the implementation example of the third mode,
the exposure time t of a single test is calculated by the angular size theta of the fan-shaped smear and the angular speed omega of the turntable. The calculation formula is as follows,
t＝θ/ω
wherein, when the fan-shaped smear does not cross the 0 degree scale,
When the fan shaped smear crosses the 0 degree scale,
ω＝360°·n
The embodiment of the utility model provides an in, n is the rotational speed of carousel, has set up when adjusting motor speed, can directly read in motor speed's the interface that sets up.
In the embodiment of the present invention, the exposure time t of a single test is calculated from the test record data according to the following formula.
The single shooting is easily influenced by the interference factors of the environment and the operation, and the average value of the multiple test exposure time can be calculated through the multiple repeated test exposure time, so that the influence of the interference factors of the environment and the operation on the test result is reduced.
For example, the exposure time is repeatedly tested N times, and the test result of each time in sequence is recorded as t1、t2、t3、……、tNThen, the N times of test results are averaged by using the following formula to obtain the average value of the exposure time of the result
In the scheme, the smear and the scale of the pointer 121 of the turntable 12 can be clearly photographed and accurately read
And
the angle theta swept by the smear of the pointer 121 can be accurately calculated, and the error of the angle theta swept by the smear of the pointer 121 caused by the fact that the turntable 12 is obliquely cut in the image because the camera device 2 is not completely opposite to the turntable is avoided, so that the effect of improving the precision of the test result can be realized. In addition, formula for calculating exposure time
In (1),
and
and the n value is directly read without being obtained through later measurement, so that the effect of high-efficiency testing is realized.
Optionally, when the fan-shaped smear angle is smaller than 180 degrees, the rotation speed of the motor 11 is increased to be a first target rotation speed, where the first target rotation speed is a rotation speed at which the fan-shaped smear angle of the pointer 121 in the image data captured by the image capture device 2 after the rotation speed of the motor 11 is increased is larger than 180 degrees and smaller than 360 degrees, so as to determine the exposure time of the image capture device 2 according to the fan-shaped smear angle of the pointer 121 in the image data captured by the image capture device 2 when the motor 11 operates at the first target rotation speed.
Optionally, the motor 11 is a constant-speed rotating motor 11 with an adjustable rotation speed, when the fan-shaped smear angle is greater than 360 degrees, the rotation speed of the motor 11 is adjusted to be a second target rotation speed, and the second target rotation speed is a rotation speed at which the fan-shaped smear angle of the pointer 121 in the image data captured by the image capture device 2 after the rotation speed of the motor 11 is adjusted to be greater than 180 degrees and less than 360 degrees, so that the exposure time of the image capture device 2 is determined according to the fan-shaped smear angle of the pointer 121 in the image data captured by the image capture device 2 when the motor 11 operates at the second target rotation speed.
Optionally, the motor 11 is a constant-speed rotating motor 11 with an adjustable rotation speed, when the fan-shaped smear angle is smaller than 180 degrees, the rotation speed of the motor 11 is increased to a plurality of third target rotation speeds, each of the third target rotation speeds is a rotation speed at which the fan-shaped smear angle of the pointer 121 in image data captured by the image capture device 2 after the rotation speed of the motor 11 is increased is greater than 180 degrees and smaller than 360 degrees, so that when the motor 11 operates at each of the third target rotation speeds, an exposure time of the image capture device 2 is determined for each fan-shaped smear angle of the pointer 121 in each image data captured by the image capture device 2, so as to obtain a plurality of exposure times corresponding to all the third target rotation speeds, and a mean value algorithm is used for the plurality of exposure times to determine a mean value exposure time as a standard exposure time of the image capture device 2.
Optionally, at least half of all the third target rotation speed sets are different target rotation speeds.
Optionally, the motor 11 is a constant-speed rotating motor 11 with an adjustable rotation speed, when the fan-shaped smear angle is greater than 360 degrees, the rotation speed of the motor 11 is reduced to a plurality of fourth target rotation speeds, each fourth target rotation speed is a rotation speed at which the fan-shaped smear angle of the pointer 121 in image data captured by the image capture device 2 after the rotation speed of the motor 11 is reduced is greater than 180 degrees and less than 360 degrees, so that when the motor 11 works at each fourth target rotation speed, the exposure time of the image capture device 2 is determined for each fan-shaped smear angle of the pointer 121 in each image data captured by the image capture device 2, so as to obtain a plurality of exposure times corresponding to all fourth target rotation speeds, and a mean value algorithm is used for the plurality of exposure times to determine a mean value exposure time as a standard exposure time of the image capture device 2.
Optionally, at least half of all the fourth target rotation speed sets are different target rotation speeds.
Optionally, the diameter of the turntable 12 is larger than 10 CM.
Optionally, the angular scale 122 has a diameter greater than 10 CM.
Optionally, the rotating disc 12 is a circular rotating disc 12, and the length of the pointer 121 is the radius of the circular rotating disc 12.
Optionally, the color difference between the side of the dial 12 where the pointer 121 is disposed and the side of the pointer 121 facing away from the dial 12 is greater than a preset value.
Optionally, one side of the turntable 12 where the pointer 121 is disposed is white, and one side of the pointer 121 opposite to the turntable 12 is black.
Optionally, one end of the pointer 121 pointing to the outer periphery of the rotating disc 12 is an isosceles triangle, and a vertex angle of the isosceles triangle of the end of the pointer 121 pointing to the outer periphery of the rotating disc 12 falls on the outer periphery of the rotating disc 12.
Optionally, one end of the pointer 121 facing the center of the rotating disc 12 is an isosceles triangle, and a vertex angle of the isosceles triangle at one end of the pointer 121 facing the center of the rotating disc 12 falls on the center of the rotating disc 12.
Optionally, the length of the base of all isosceles triangles is greater than or equal to 3 times the width of the pointer 121.
Optionally, all isosceles triangles are equilateral triangles.
According to the technical solution provided by the utility model, the embodiment of the utility model has the following advantage:
the embodiment of the utility model provides a test camera equipment exposure time's device, include: the rotary table with the motor is characterized in that a pointer is fixed at the center of the rotary table, a 360-degree angle scale is arranged on the periphery of one surface of the rotary table, which is used for fixing the pointer, and the center of the 360-degree angle scale is concentric with the center of the rotary table; when the exposure time of the camera equipment is tested, the motor is started, the turntable is driven by the motor to rotate according to the preset rotating speed of the motor, the camera equipment shoots image data comprising the pointer, the turntable and the angle scale, and the exposure time of the camera equipment is determined according to the sector smear angle of the pointer shot in the image data. The testing device has the advantages of simple layout when testing, high precision of exposure time detection technology, high flexibility, simplicity, small difficulty in building the device, easiness and convenience in maintenance, and easiness in replacing parts to be maintained.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product.
The computer program product includes one or more computer instructions. The procedures or functions described in accordance with the embodiments of the present invention are all or partially performed when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can store or a data storage device, such as a server, a data center, etc., that is integrated with one or more available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (5)
1. An apparatus for testing exposure time of an image pickup device, comprising: the carousel of electrified machine, the center of carousel is fixed with the pointer, the carousel is fixed the periphery of the one side of pointer sets up 360 degrees angle scales, 360 degrees angle scales's center with the center of carousel is concentric.
2. The apparatus as claimed in claim 1, further comprising a turntable sleeve, wherein the 360 degree angle scale is disposed on an outer circumference of the turntable sleeve, and the turntable is disposed by being sleeved on the turntable sleeve to fixedly dispose the 360 degree angle scale on an outer circumference of a side of the turntable on which the pointer is fixed.
3. The apparatus of claim 1, further comprising an angle scale fixing member, wherein the 360 degree angle scale is fixedly connected to an outer circumference of a face of the turntable on which the pointer is fixed by the angle scale fixing member.
4. The apparatus according to any one of claims 1-3, wherein the motor is a constant speed rotating motor, and a rotating shaft of the motor is correspondingly installed at the center of the turntable.
5. The apparatus of claim 4, wherein the motor is a constant speed rotating motor with adjustable speed.
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| CN201921280538.7U CN211378160U (en) | 2019-08-08 | 2019-08-08 | Device for testing exposure time of camera equipment |
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| CN201921280538.7U CN211378160U (en) | 2019-08-08 | 2019-08-08 | Device for testing exposure time of camera equipment |
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