Device for testing defocusing amount of camera in high and low temperature environment

Abstract

The utility model discloses a device for testing the defocusing amount of a camera in a high and low temperature environment, comprising a test box, one side of the test box is hinged with two groups of box doors through hinges, when the camera is subjected to a defocusing amount test in a high temperature environment, heating is started through a heating device, so that heat enters the test box through a communication net groove, and the test box is connected with the test box. The temperature sensor monitors the temperature in the test box, so that the temperature in the test box reaches a proper temperature, the test mechanism and the to-be-tested camera are matched to carry out a test in a high-temperature environment, the control panel displays and controls data during the test, and in a similar way, during a low-temperature test, the refrigeration device starts refrigeration, so that the temperature in the test box is reduced. Refrigerated air enters the test box through the communication net groove, the temperature in the test box is monitored through the temperature sensor, the test mechanism and the to-be-tested camera are matched for testing in a low-temperature environment, and the performance stability and adaptability of the camera under an extreme temperature condition can be detected to a certain extent.

Description

Technical Field

[0001] The utility model relates to the technical field of optical detection, in particular to a defocus amount testing device for a camera under high and low temperature environments. Background Art

[0002] A camera consists of multiple components, including a lens, an image sensor (such as a CCD or CMOS sensor), and a power supply. The quality of the lens directly affects the camera's imaging performance, while the image sensor is a key component that converts light signals into electrical signals. When using a camera to capture objects at different distances, the distance between the lens focus and the sensor must be adjusted to ensure a clear image of the subject on the sensor. This means that the amount of defocus varies depending on the distance of the subject.

[0003] For example, a device for measuring the defocus amount of a camera (Announcement No.: CN216349485U), the utility model includes: a parallel light tube, a camera to be tested is provided on one side of the parallel light tube, a light source, a light emitting plate, a target, and a light tube lens are sequentially provided inside the parallel light tube, and the light emitted by the light source evenly illuminates the target after passing through the light emitting plate. The device for measuring the defocus amount of a camera described in the utility model uses a grating ruler to accurately record the target position in real time, connects the camera to be tested to an image acquisition system for image acquisition and calculation, and obtains the position when the target image is clearest. According to the distance between the target and the reference point at this time, combined with the focal length of the light tube lens and the focal length of the lens of the camera to be tested, the distance between the lens focus of the camera to be tested and the sensor can be obtained by calculation. The optical path structure of the device of the utility model is simple and can accurately obtain the defocus amount.

[0004] Based on the search of the above patents and combined with the equipment in the prior art, it was found that the above equipment cannot detect the performance stability and adaptability of the camera under extreme temperature conditions when used, which is crucial to ensure the normal operation of the camera in various complex environments. Therefore, we need to propose a defocus test device for the camera in high and low temperature environments. Utility Model Content

[0005] The purpose of the present invention is to provide a device for testing the defocus of a camera in high and low temperature environments to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A device for testing the defocus amount of a camera in a high and low temperature environment comprises a test box, two sets of doors being hingedly connected to one side of the test box by hinges, a mounting shell being fixedly mounted on the bottom of the test box, a partition being fixedly mounted at the center of the interior of the mounting shell, a heating device and a cooling device being respectively mounted on both sides of the mounting shell on which the partition is located, the test box being symmetrically provided with four sets of connecting network slots above the heating device and the cooling device, a test mechanism being mounted on the inner bottom of the test box, and a camera to be tested for use in conjunction with the test mechanism being arranged inside the test box, a temperature sensor being fixedly mounted on the inner top of the test box, and a control panel being fixedly mounted on one side of the test box.

[0008] Preferably, the heating device consists of a mounting base and a heating tube, and the refrigeration device consists of a compressor, an evaporator and a condenser.

[0009] Preferably, the testing mechanism includes a parallel light tube, a lamp holder is installed inside one end of the parallel light tube, a light source is fixedly installed on one side of the lamp holder, a light emitting plate and a target are movably installed on the parallel light tube directly in front of the light source, and a lens is fixedly installed inside the end of the parallel light tube away from the lamp holder.

[0010] Preferably, a grating ruler is fixedly embedded in the inner top of the collimator, and the light averaging plate and the target are fixedly mounted on the reading head of the grating ruler.

[0011] Preferably, two sets of support frames are symmetrically fixedly installed on the bottom of the collimator, and the bottoms of the two sets of support frames are fixedly connected to the inner bottom of the test box. The light source, light averaging plate, target, lens and lens of the camera to be tested are coaxially arranged in sequence.

[0012] Preferably, an exhaust pipe connected to the interior of the test box is fixedly connected to the top of one side of the test box, and an exhaust valve is provided on the outer wall of the exhaust pipe.

[0013] Preferably, both sets of doors are provided with observation windows resistant to high and low temperatures, and the mounting shell is provided with ventilation holes on one side of the refrigeration device.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] When the utility model tests the defocus amount of a camera in a high-temperature environment, heating is started by the heating device, so that heat enters the test box through the connecting mesh slot, and the temperature sensor monitors the temperature in the test box to make the temperature in the test box reach an appropriate temperature. Then, the test is carried out in the high-temperature environment by cooperating with the test mechanism and the camera to be tested, and the control panel displays and controls the data during the test. Similarly, during the low-temperature test, refrigeration is started by the refrigeration device, so that the refrigerated air enters the test box through the connecting mesh slot, and the temperature in the test box is monitored by the temperature sensor. The test is carried out in the low-temperature environment by cooperating with the test mechanism and the camera to be tested, which can detect the performance stability and adaptability of the camera under extreme temperature conditions to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the utility model in cross section;

[0018] Figure 3 It is a structural diagram of the testing mechanism of the utility model.

[0019] In the figure: 1. Test box; 2. Box door; 3. Mounting shell; 4. Partition; 5. Heating device; 6. Refrigeration device; 7. Connecting mesh slot; 8. Test mechanism; 81. Collimator; 82. Lamp holder; 83. Light source; 84. Light averaging plate; 85. Target; 86. Grating ruler; 87. Lens; 88. Support frame; 9. Camera to be tested; 10. Temperature sensor; 11. Exhaust pipe; 12. Observation window; 13. Control panel; 14. Ventilation hole. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1-3 , the utility model provides a technical solution:

[0022] A device for testing the defocus amount of a camera in a high and low temperature environment comprises a test box 1, two sets of doors 2 are hingedly connected to one side of the test box 1 by hinges, a mounting shell 3 is fixedly installed on the bottom of the test box 1, a partition 4 is fixedly installed at the center of the mounting shell 3, a heating device 5 and a cooling device 6 are respectively installed on both sides of the mounting shell 3 on the partition 4, the test box 1 is located above the heating device 5 and the cooling device 6 and is symmetrically provided with four sets of connecting network slots 7, a testing mechanism 8 is installed on the inner bottom of the test box 1, and a camera to be tested 9 used in conjunction with the testing mechanism 8 is arranged inside the test box 1, a temperature sensor 10 is fixedly installed on the inner top of the test box 1, and a control panel 13 is fixedly installed on one side of the test box 1.

[0023] The heating device 5 is composed of a mounting base and a heating pipe, and the refrigeration device 6 is composed of a compressor, an evaporator and a condenser. The heating pipe is used to heat the air, and the compressor, evaporator and condenser cooperate to cool the air.

[0024] The testing mechanism 8 includes a parallel light tube 81, a lamp holder 82 is installed inside one end of the parallel light tube 81, a light source 83 is fixedly installed on one side of the lamp holder 82, a light emitting plate 84 and a target 85 are movably installed on the parallel light tube 81 directly in front of the light source 83, and a lens 87 is fixedly installed inside the end of the parallel light tube 81 away from the lamp holder 82.

[0025] A grating ruler 86 is fixedly embedded in the inner top of the collimator 81 , and the light-homogenizing plate 84 and the target 85 are fixedly mounted on the reading head of the grating ruler 86 . The grating ruler 86 accurately records the position of the target 85 in real time.

[0026] Two sets of support frames 88 are symmetrically fixedly installed on the bottom of the parallel light tube 81. The bottoms of the two sets of support frames 88 are fixedly connected to the inner bottom of the test box 1. The light source 83, the light averaging plate 84, the target 85, the lens 87 and the lens of the camera to be tested 9 are coaxially arranged in sequence.

[0027] An exhaust pipe 11 connected to the interior of the test box 1 is fixedly connected to the top of one side of the test box 1 , and an exhaust valve is provided on the outer wall of the exhaust pipe 11 .

[0028] The control panel 13 is electrically connected to the heating device 5 , the cooling device 6 , the testing mechanism 8 , the camera to be tested 9 , the temperature sensor 10 and the exhaust valve through wires.

[0029] The test box 1 , the box door 2 and the installation shell 3 are all made of high-temperature resistant and low-temperature resistant materials.

[0030] Both sets of doors 2 are provided with high and low temperature resistant observation windows 12, which are made of high and low temperature resistant glass. The mounting shell 3 is provided with ventilation holes 14 on one side of the refrigeration device 6 to facilitate ventilation of the refrigeration device 6 in the mounting shell 3.

[0031] Working principle: When the present invention is used, when the defocus amount of the camera is tested in a high-temperature environment, the heating is started by the heating device 5, so that the heat enters the test box 1 through the connecting mesh slot 7, and the temperature sensor 10 monitors the temperature in the test box 1 to make the temperature in the test box 1 reach an appropriate temperature, and then the test is carried out in a high-temperature environment through the cooperation of the testing mechanism 8 and the camera to be tested 9. The control panel 13 displays and controls the data during the test. Similarly, during the low-temperature test, the test box 1 is exhausted through the exhaust pipe 11 in conjunction with the exhaust valve to accelerate the cooling of the test box 1, and the refrigeration is started through the refrigeration device 6 to allow the refrigerated air to enter the test box 1 through the connecting mesh slot 7. The temperature in the test box 1 is monitored by the temperature sensor 10, and the test is carried out in a low-temperature environment through the cooperation of the testing mechanism 8 and the camera to be tested 9. To a certain extent, the performance stability and adaptability of the camera under extreme temperature conditions can be detected.

[0032] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for testing the defocus of a camera in a high or low temperature environment, comprising a test box (1), characterized in that: One side of the test box (1) is hinged with two sets of box doors (2), the bottom of the test box (1) is fixedly installed with a mounting shell (3), the interior of the mounting shell (3) is fixedly installed with a partition (4), the mounting shell (3) is located on both sides of the partition (4) and is respectively installed with a heating device (5) and a refrigeration device (6), the test box (1) is located above the heating device (5) and the refrigeration device (6) and is symmetrically provided with four sets of connecting network slots (7), the inner bottom of the test box (1) is installed with a testing mechanism (8), and the interior of the test box (1) is provided with a camera to be tested (9) used in conjunction with the testing mechanism (8), the inner top of the test box (1) is fixedly installed with a temperature sensor (10), and one side of the test box (1) is fixedly installed with a control panel (13).

2. The device for testing the defocus of a camera under high and low temperature environments according to claim 1, wherein: The heating device (5) is composed of a mounting base and a heating pipe, and the refrigeration device (6) is composed of a compressor, an evaporator and a condenser.

3. The defocus test device for a camera in a high or low temperature environment according to claim 1, characterized in that: The testing mechanism (8) comprises a collimator (81), a lamp holder (82) is installed inside one end of the collimator (81), a light source (83) is fixedly installed on one side of the lamp holder (82), a light emitting plate (84) and a target (85) are movably installed on the collimator (81) located directly in front of the light source (83), and a lens (87) is fixedly installed inside one end of the collimator (81) away from the lamp holder (82).

4. The device for testing the defocus of a camera under high and low temperature environments according to claim 3, wherein: A grating ruler (86) is fixedly embedded in the inner top of the collimator (81), and the light averaging plate (84) and the target (85) are both fixedly mounted on the reading head of the grating ruler (86).

5. The device for testing the defocus of a camera under high and low temperature environments according to claim 4, characterized in that: Two sets of support frames (88) are symmetrically fixedly installed on the bottom of the collimator (81), and the bottoms of the two sets of support frames (88) are fixedly connected to the inner bottom of the test box (1). The light source (83), the light averaging plate (84), the target (85), the lens (87) and the lens of the camera to be tested (9) are coaxially arranged in sequence.

6. The device for testing the defocus of a camera in a high or low temperature environment according to claim 1, wherein: An exhaust pipe (11) connected to the interior of the test box (1) is fixedly plugged into the top of one side of the test box (1), and an exhaust valve is provided on the outer wall of the exhaust pipe (11).

7. The device for testing the defocus of a camera in a high or low temperature environment according to claim 1, wherein: Both sets of the door (2) are provided with observation windows (12) resistant to high and low temperatures, and the installation shell (3) is provided with a ventilation hole (14) on one side of the refrigeration device (6).

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