Optical filter adaptive switching device based on solar intensity

Abstract

The invention discloses an optical filter adaptive switching device based on sun intensity, which is assembled on a photoelectric sun angle detection device and comprises an optical filter conversion device, an optical filter, a motor and a processor. The photoelectric sun angle detection device comprises a collimator and a four-quadrant sensor arranged at the emergent end of the collimator. And the motor and the optical filter conversion device are arranged at the incident end of the collimator. The optical filter conversion device is of a disc structure with a through hole in the center, a plurality of installation bases are arranged on the outer circumference of the disc at intervals, optical filters are fixed to the installation bases, and the transmittance of the optical filters is different. And the processor judges whether the optical filter needs to be switched based on the illumination intensity measured by the four-quadrant sensor and the transmittance of the currently used optical filter. The optical filter can be adaptively switched according to the current sunlight intensity, the detectable range of the four-quadrant sensor is achieved, the adaptability is high, and the economical efficiency is high.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of photoelectric detection, and particularly relates to a filter self-adaptive switching device based on solar intensity. BACKGROUND

[0002] The photoelectric solar angle detection device is mainly used for observing the current position of the sun, and the working principle is that the sun light is captured based on a four-quadrant sensor, and the angle of the sun is calculated in combination with the spatial layout of the sensor to realize accurate detection. After the sun light enters the parallel light pipe, the light spot is irradiated on the four-quadrant sensor after the light pipe, and the light incidence angle can be calculated according to the position of the light spot.

[0003] However, the dynamic range of the sun light intensity is strong, the price of the detector with a wide recognition range is high, and the cost performance is low; when the low-cost detector with a limited recognition range is selected, the filter processing needs to be performed with the help of the filter, but the filter needs to be manually and frequently replaced according to the light conditions, which greatly increases the operation difficulty. SUMMARY

[0004] The application aims to provide a filter self-adaptive switching device based on solar intensity, which is assembled on a photoelectric solar angle detection device.

[0005] The switching device comprises a filter conversion device, a filter, a motor and a processor.

[0006] The incident end of the parallel light pipe is provided with the motor and the filter conversion device, and the exit end is provided with the four-quadrant sensor.

[0007] The filter conversion device is a disc structure with a through hole in the center, and a plurality of mounting seats are arranged on the outer circumference of the disc.

[0008] The motor is fixed on the parallel light pipe, the output shaft of the motor is connected with the through hole of the filter conversion device, the filter conversion device is driven to rotate by the motor, so that the filter is aligned with the incident port of the parallel light pipe.

[0009] When the filter on the mounting seat is aligned with the incident port of the parallel light pipe, the center of the filter, the center of the light transmission aperture of the parallel light pipe and the detection center of the four-quadrant sensor are located on the same straight line.

[0010] ​The processor is used for receiving information of the four-quadrant sensor, and judging whether the filter needs to be switched based on the light intensity measured by the four-quadrant sensor and the transmittance of the filter currently used, if yes, controlling the rotation of the output shaft to switch the filter adapting to the current light intensity, otherwise, still using the current filter.

[0011] Further, when the sunlight is irradiated to the four-quadrant sensor through the filter and the collimator, a light spot is formed on the four-quadrant sensor.

[0012] The size of the filter is consistent with the required light spot size.

[0013] Further, the transmittance of the filters gradually decreases in a clockwise direction, which is the clockwise direction when the exit end of the collimator is observed in the axial direction from the entrance end of the collimator.

[0014] Further, the switching mode of the filter is:

[0015] If the current light intensity is greater than the upper limit of the measurement of the four-quadrant sensor, the motor output shaft is controlled to rotate clockwise to select a filter with lower transmittance.

[0016] If the current light intensity is less than the lower limit of the measurement of the four-quadrant sensor, the motor output shaft is controlled to rotate counterclockwise to select a filter with higher transmittance.

[0017] Further, the number of the mounting seats is 5.

[0018] The technical effect of the present application is self-evident, and the beneficial effects of the present application are as follows:

[0019] 1) The adaptive switching device of the present application selects a low-detection-range detector, which can realize the measurement of a wide range of sunlight intensity, and is more economical than the expensive detector.

[0020] 2) The filter of the present application can be adaptively switched according to the current sunlight intensity to reach the range that can be detected by the four-quadrant sensor. DETAILED DESCRIPTION

[0021] Figure 1 It is a schematic diagram of the photoelectric solar angle detection principle;

[0022] Figure 2 It is a schematic diagram of the light spot receiving of the four-quadrant sensor;

[0023] Figure 3 It is a schematic diagram of the switching device;

[0024] Figure 4 It is a schematic diagram of the switching device;

[0025] Figure 5A schematic diagram of a filter switching device is shown in the figure.

[0026] In the figure: switching device 1, filter switching device 2, through hole 201, mounting seat 202, filter 3, motor 4, collimator 5, four-quadrant sensor 6, light spot 7. DETAILED DESCRIPTION

[0027] The application will be further described in conjunction with the examples below, but should not be understood as limiting the above-mentioned subject matter of the application to the following examples. Various substitutions and modifications can be made according to ordinary technical knowledge and conventional means in the art without departing from the above-mentioned technical idea of the application, and all should be included in the protection scope of the application.

[0028] Example 1

[0029] A filter self-adaptive switching device based on solar intensity, the switching device 1 is assembled on a photoelectric solar angle detection device.

[0030] The switching device 1 includes a filter switching device 2, a filter 3, a motor 4 and a processor. The photoelectric solar angle detection device includes a collimator 5 and a four-quadrant sensor 6.

[0031] The incident end of the collimator 5 is provided with the motor 4 and the filter switching device 2, and the exit end is provided with the four-quadrant sensor 6.

[0032] The filter switching device 2 is a disc structure with a through hole 201 in the center, and a plurality of mounting seats 202 are arranged on the outer circumference of the disc. A circular filter 3 is fixed on each mounting seat 202, and the transmittance of each filter 3 is different.

[0033] The motor 4 is fixed on the collimator 5, the output shaft of the motor 4 is connected with the through hole 201 of the filter switching device 2, and the motor 4 drives the filter switching device 2 to rotate, so that the filter 3 is aligned with the incident port of the collimator 5.

[0034] When the filter 3 on a mounting seat 202 is aligned with the incident port of the collimator 5, the center of the filter 3, the center of the light transmission aperture of the collimator 5 and the detection center of the four-quadrant sensor 6 are located on the same straight line.

[0035] The processor is used to receive the information of the four-quadrant sensor 6, and based on the light intensity measured by the four-quadrant sensor 6 and the transmittance of the currently used filter 3, to determine whether the filter 3 needs to be switched, if yes, to control the output shaft to rotate and switch the filter 3 adapted to the current light intensity, otherwise, to still use the current filter 3.

[0036] Example 2

[0037] The main structure of this embodiment is the same as that of Embodiment 1, and further, when the sunlight is irradiated to the four-quadrant sensor 6 through the filter 3 and the collimator 5, a light spot 7 is formed on the four-quadrant sensor 6. The four-quadrant sensor 6 is spliced by 4 photosensitive sensors.

[0038] The size of the filter 3 is consistent with the size of the required collected light spot 7.

[0039] Embodiment 3:

[0040] The main structure of this embodiment is the same as that of any one of Embodiments 1-2, and further, the transmittance of the filters 3 gradually decreases in a clockwise direction, which is the clockwise direction when the exit end of the collimator 5 is observed in the axial direction from the entrance end.

[0041] Embodiment 4:

[0042] The main structure of this embodiment is the same as that of any one of Embodiments 1-3, and further, the switching mode of the filter 3 is:

[0043] If the current light intensity is greater than the upper limit of the measurement of the four-quadrant sensor 6, the output shaft of the motor 4 is rotated clockwise, and a filter 3 with lower transmittance is selected.

[0044] If the current light intensity is less than the lower limit of the measurement of the four-quadrant sensor 6, the output shaft of the motor 4 is rotated counterclockwise, and a filter 3 with higher transmittance is selected.

[0045] Embodiment 5:

[0046] The main structure of this embodiment is the same as that of any one of Embodiments 1-4, and further, the number of the mounting seats 202 is 5.

[0047] Embodiment 6:

[0048] The main structure of this embodiment is the same as that of any one of Embodiments 1-5, and further, when the solar intensity is measured, the range of the solar intensity does not match the range that can be checked by the four-quadrant sensor. Therefore, the filter is needed to reduce the energy of the sunlight entering the sensor, but the solar intensity is changing all the time, and a single filter cannot be reduced to the energy just meeting the measurement range of the four-quadrant sensor, so the automatic switching device of the filter is designed.

[0049] The filter self-adaptive switching device system includes a filter conversion device 2, a motor 4, and a collimator 5, and the system composition is as shown in Figure 3 .

[0050] The filter conversion device is composed of 5 filters with different transmittances, and each filter is arranged in the order of gradually increasing transmittance, as shown in Figure 5 .

[0051] The filter 3 on the filter switching device 2 is concentric with the parallel light pipe 5 and the four-quadrant sensor 6, and the size of the filter 3 is consistent with the size of the required light spot to be collected, so as to ensure that the filter 2, the parallel light pipe 5 and the four-quadrant sensor 6 are coaxial. The filter switching device 2 is connected with the motor 4 through a connecting rod, the motor 4 drives the filter switching device 2 to rotate, so as to switch the filter 3.

[0052] Embodiment 7:

[0053] The main structure of the embodiment is the same as any one of embodiments 1-6, and further, the present application integrates multiple filters on the filter switching device, and the transmittance increases in turn, the light intensity is identified by the detector, the processor controls the motor to rotate, and the adaptive switching of the filter is realized.

[0054] The specific working process is as follows: the sunlight passes through the filter and enters the parallel light pipe to irradiate on the four-quadrant sensor, the photosensitive sensor on the detector identifies the light intensity at this time. If the light intensity at this time is saturated, the processor controls the motor to rotate clockwise, and a filter with lower transmittance is selected; if the light intensity at this time is low, the processor controls the motor to rotate counterclockwise, and a filter with higher transmittance is selected. That is, the filter can be automatically switched according to the light intensity.

Claims

1. A filter adaptive switching device based on solar intensity, characterized in that: The switching device (1) is mounted on the photoelectric solar angle detection device; The switching device (1) includes a filter conversion device (2), a filter (3), a motor (4), and a processor; the photoelectric solar angle detection device includes a collimator (5) and the four-quadrant sensor (6). The parallel light tube (5) is equipped with a motor (4) and a filter conversion device (2) at the incident end, and a four-quadrant sensor (6) at the output end. The filter conversion device (2) is a disc structure with a through hole (201) in the center. Several mounting seats (202) are arranged at intervals on the outer circumference of the disc. A circular filter (3) is fixed on each mounting seat (202), and the transmittance of each filter (3) is different. The motor (4) is fixed on the collimator (5). The output shaft of the motor (4) is connected to the through hole (201) of the filter conversion device (2). The motor (4) drives the filter conversion device (2) to rotate, thereby aligning the filter (3) with the entrance of the collimator (5). When the filter (3) on a certain mounting base (202) is aligned with the entrance of the collimator (5), the center of the filter (3), the center of the light transmission aperture of the collimator (5), and the detection center of the four-quadrant sensor (6) are on the same straight line. The processor is used to receive information from the four-quadrant sensor (6) and, based on the light intensity measured by the four-quadrant sensor (6) and the transmittance of the currently used filter (3), determine whether the filter (3) needs to be switched. If so, the output shaft is controlled to rotate to switch to a filter (3) that is adapted to the current light intensity. Otherwise, the current filter (3) is still used.

2. The filter adaptive switching device based on solar intensity according to claim 1, characterized in that: When sunlight shines on the four-quadrant sensor (6) through the filter (3) and the collimator (5), a light spot (7) is formed on the four-quadrant sensor (6). The size of the filter (3) is the same as the size of the light spot (7) to be collected.

3. The filter adaptive switching device based on solar intensity according to claim 1, characterized in that: The transmittance of several of the filters (3) decreases gradually in a clockwise direction, which is the clockwise direction when the output end is observed axially from the incident end (5) of the collimator.

4. The filter adaptive switching device based on solar intensity according to claim 3, characterized in that: The switching mode of the filter (3) is as follows: If the current light intensity is greater than the upper limit of the measurement of the four-quadrant sensor (6), the output shaft of the control motor (4) is rotated clockwise, and a filter (3) with lower transmittance is selected. If the current light intensity is less than the lower limit of the measurement of the four-quadrant sensor (6), the output shaft of the control motor (4) is rotated counterclockwise, and a filter (3) with higher transmittance is selected.

5. The filter adaptive switching device based on solar intensity according to claim 1, characterized in that: The number of mounting bases (202) is 5.

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