Partial coherent beacon emission light source of large-aperture scintillator

Abstract

The utility model discloses a partially coherent beacon emission light source of a large-aperture scintillator, and relates to the technical field of signal light source emission. In order to realize the technical effects that under the condition of atmospheric turbulence, the atmospheric refractive index structure constant is accurately measured by processing a received light intensity fluctuation signal, so that the atmospheric optical turbulence intensity and the earth surface sensible heat flux are effectively inverted, the technical scheme provided by the utility model is as follows: the partially coherent light source comprises four sub light sources, the four sub light sources are uniformly arranged on the light source substrate in an array mode; the sub light source comprises a bulb and a base, the bulb is installed on the base, and the base is installed on the light source substrate. A partially coherent beacon emission light source of a large-aperture scintillator comprises at least four partially coherent light sources which are uniformly spliced in an array mode; and the power supply module is used for supplying power to the transmitting end array part coherent light source. The method is suitable for the design of a large-aperture scintillator and the work of data transmission.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of signal light source emission, and particularly relates to a partially coherent beacon light source of a large-aperture scintillometer. BACKGROUND

[0002] When a beam of light propagates in the atmosphere, the energy will be attenuated in various forms, resulting in signal weakening, of which the most influential is the fluctuation of air density caused by the fluctuation of temperature, humidity and air pressure on the propagation path, which further causes the fluctuation of air refraction index. This fluctuation further causes the fluctuation of light intensity, i.e. scintillation, and the atmospheric refractive index structure constant can be measured by the scintillation method, and the heat flux can be further obtained by combining the MOST similarity theory.

[0003] The atmospheric refractive index structure constant is an important parameter representing the optical turbulence intensity of the atmosphere. In atmospheric turbulence, it is the random change of the refractive index that causes the random change of the wavefront of the light beam in the transmission process, resulting in a series of turbulence effects such as intensity fluctuation, expansion and drift of the light beam, which reduces the quality of the light beam, and thus the received light intensity fluctuates. The light intensity fluctuation variance caused by atmospheric turbulence can be used to invert the atmospheric refractive index structure constant.

[0004] The large-aperture scintillometer is an instrument for measuring the surface water heat flux in a certain area based on the light propagation theory and combining the MOST similarity theory. The exchange of momentum, heat and water vapor between the atmosphere and the ground plays a very important role in the atmospheric dynamic and thermal processes, and thus the measurement of the sensible heat flux and the latent heat flux of the ground has special significance for agriculture, meteorology, hydrology and especially water resource management. The large-aperture scintillometer is widely used in domestic measurement due to its wide measurement range, high consistency with the eddy correlation instrument and high measurement accuracy.

[0005] However, there is no more adaptable technical method for realizing the accurate measurement of the atmospheric refractive index structure constant by processing the received light intensity fluctuation signal under the condition of atmospheric turbulence, and effectively inverting the atmospheric optical turbulence intensity and the surface sensible heat flux. CONTENT OF THE INVENTION

[0006] To realize the technical effect of accurately measuring the atmospheric refractive index structure constant by processing the received light intensity fluctuation signal under the condition of atmospheric turbulence, and effectively inverting the atmospheric optical turbulence intensity and the surface sensible heat flux, the technical scheme provided by the present application is as follows.

[0007] The partially coherent light source comprises:

[0008] The four sub-light sources are arranged in an array on the light source substrate.

[0009] The sub-light source comprises a bulb and a base, the bulb is installed on the base, and the base is installed on the light source substrate.

[0010] Further, a preferred embodiment is provided, wherein the light source substrate is a cuboid structure.

[0011] Further, a preferred embodiment is provided, wherein the bulb is a sphere.

[0012] Further, a preferred embodiment is provided, wherein the base is a cuboid structure.

[0013] Further, a preferred embodiment is provided, wherein the side walls of the light source substrate can be spliced with each other.

[0014] A partially coherent beacon transmitting light source of a large-aperture scintillator, comprising:

[0015] At least four of the partially coherent light sources are uniformly spliced in an array.

[0016] A power module for powering the array of partially coherent light sources.

[0017] Further, a preferred embodiment is provided, wherein the transmitting light source further comprises a shell, and the shell is movably connected with the base.

[0018] Further, a preferred embodiment is provided, wherein two protrusions are arranged on each of the two side walls of the shell, and one of the protrusions is arranged on the same side for rotationally connecting with the base, and the other protrusion is arranged on the same side for being embedded in a long-strip-shaped groove of the base and sliding along the groove.

[0019] Further, a preferred embodiment is provided, wherein the groove is a circular-arc-shaped through hole.

[0020] A large-aperture scintillator comprising the transmitting light source as a light source transmitting end and a light source receiving end.

[0021] Compared with the prior art, the technical scheme provided by the utility model has the advantages of:

[0022] The partially coherent beacon transmitting light source of the large-aperture scintillator provided by the utility model amplifies signals through two-stage amplification units, ensures that the weak light signals received by the receiving end can be sufficiently enhanced, and improves the accuracy of subsequent processing. Compared with a system without amplification processing, this way effectively reduces signal loss and distortion, so that subtle changes in light intensity fluctuations can be accurately captured.

[0023] The partial coherent beacon transmitting light source of the large-aperture scintillometer has a filter unit for processing the amplified signal, removes interference and noise, and improves the purity of the signal.

[0024] The partial coherent beacon transmitting light source of the large-aperture scintillometer provided by the utility model converts the analog signal into a digital signal through an AD converter, so that the signal processing becomes more efficient and accurate.

[0025] The partial coherent beacon transmitting light source of the large-aperture scintillometer provided by the utility model has an FPGA for high-speed collection and serial transmission of the digital signal, greatly improving the efficiency and real-time performance of data processing.

[0026] The partial coherent beacon transmitting light source of the large-aperture scintillometer provided by the utility model has an upper computer for inversion calculation in combination with meteorological parameters, accurately calculating the atmospheric refractive index structure constant and sensible heat flux.

[0027] The partial coherent beacon transmitting light source of the large-aperture scintillometer provided by the utility model is convenient for real-time monitoring and long-term analysis of users.

[0028] The partial coherent beacon transmitting light source of the large-aperture scintillometer provided by the utility model is suitable for design and data transmission of the large-aperture scintillometer. ACCURACY

[0029] Figure 1 It is an array partial coherent light source design principle diagram;

[0030] The left side is a light source, the right side is a receiving end, and the middle is atmospheric turbulence.

[0031] Figure 2A front view of a partially coherent beacon emitting light source for a large aperture scintillometer;

[0032] Figure 3 A side view of a partially coherent beacon emitting light source for a large aperture scintillometer;

[0033] Figure 4 A bottom view of a partially coherent beacon emitting light source for a large aperture scintillometer;

[0034] Figure 5 A schematic diagram of a power supply circuit;

[0035] Figure 6 A schematic diagram of a light source driving module;

[0036] Figure 7 A schematic diagram of a data processing module. DETAILED DESCRIPTION

[0037] In order to make the advantages and beneficial effects of the technical scheme provided by the utility model more clear, the technical scheme provided by the utility model is further described in detail in combination with the drawings, and the specific embodiments are as follows:

[0038] Embodiment one, the embodiment provides a partially coherent light source, which comprises:

[0039] Four sub-light sources, the four sub-light sources are arranged uniformly on a light source substrate in an array mode;

[0040] The sub-light source comprises a bulb and a base, the bulb is installed on the base, and the base is installed on the light source substrate.

[0041] Embodiment two, the embodiment is a further limitation of the partially coherent light source provided by the embodiment one, and the light source substrate is a cuboid structure.

[0042] Embodiment three, the embodiment is a further limitation of the partially coherent light source provided by the embodiment one, and the bulb is a sphere.

[0043] Embodiment four, the embodiment is a further limitation of the partially coherent light source provided by the embodiment one, and the base is a cuboid structure.

[0044] Embodiment five, the embodiment is a further limitation of the partially coherent light source provided by the embodiment one, and the side walls of the light source substrate can be spliced with each other.

[0045] Embodiment six, in combination with Figures 1-7 The embodiment provides a partially coherent beacon emitting light source for a large aperture scintillometer, which comprises:

[0046] At least four embodiments of the partial coherent light source are provided in an array form, which are uniformly spliced;

[0047] A power module for powering the partial coherent light source of the transmitting end array.

[0048] Specifically, it includes:

[0049] The light source array:

[0050] The light source is designed in an array form, and four sub-light sources are uniformly distributed inside.

[0051] Function: The array light source provides higher surface uniformity and larger beam divergence angle through the design of uniformly distributed sub-light sources. Compared with traditional laser light sources, the array light source has a larger divergence angle and a uniform light-emitting surface, improving the alignment accuracy and anti-shaking ability in long-distance measurement, while the partial coherent light has stronger anti-atmospheric interference ability, suitable for more extreme environments, ensuring the accuracy of measurement results.

[0052] Power module:

[0053] DC-DC switching step-down conversion chip (XL4015) and forward low-voltage stabilizer (ASM1117-3.3) are used.

[0054] Function: The power module stabilizes the input DC voltage (10-15V) to 5V DC power through the step-down conversion chip, and provides 3.3V DC power through the stabilizer to supply the system devices and core controller (STM32F103ZE) to work.

[0055] Drive module:

[0056] Based on STM32F103ZE single-chip microcomputer and L298N control module.

[0057] Function: The drive module controls L298N through the PWM signal output by the single-chip microcomputer to realize continuous adjustment of brightness.

[0058] At the receiving end, the light source signal from the transmitting end is received, amplified and processed through two-stage amplification and filtering units, and converted into a digital signal through AD conversion. Finally, through FPGA signal acquisition and high-speed serial transmission, the decoded light intensity value is transmitted into the host computer for calculation, and the host computer is assisted by meteorological parameter inversion to obtain the atmospheric refractive index structure constant and sensible heat flux, and is stored and displayed.

[0059] Embodiment seven, this embodiment is a further limitation of the partial coherent beacon transmitting light source of the large-aperture scintillometer provided in embodiment six, the transmitting light source further includes a shell, and the shell is movably connected with the base.

[0060] The base can rotate left and right relative to the ground.

[0061] Embodiment eight, this embodiment is a further limitation of the partially coherent beacon transmitting light source of the large-aperture scintillometer provided in embodiment seven, two protrusions are arranged on each side wall of the shell, and in the same side, one of the protrusions is used for rotating connection with the base, and the other protrusion is used for embedding in the long strip-shaped groove of the base and sliding along the groove.

[0062] Embodiment nine, this embodiment is a further limitation of the partially coherent beacon transmitting light source of the large-aperture scintillometer provided in embodiment eight, the groove is a circular arc-shaped through hole.

[0063] Embodiment ten, this embodiment provides a large-aperture scintillometer, which comprises the transmitting light source provided in embodiment six as a light source emitting end, and a light source receiving end.

[0064] The working process of the system is as follows:

[0065] Signal receiving and amplification

[0066] The receiving end receives the light source signal emitted by the emitting end and amplifies the signal through two-stage amplification units.

[0067] Specifically, when the emitted partially coherent light passes through atmospheric turbulence to reach the receiving end, the light wave will drift, refract, scatter and other phenomena due to atmospheric disturbance, resulting in fluctuations in light intensity. The receiving end first amplifies the received weak light signal through two-stage amplification units to ensure the accuracy of subsequent signal processing.

[0068] Output: amplified light intensity signal.

[0069] Signal filtering

[0070] The amplified light intensity signal is processed by a filtering unit to remove interference.

[0071] Specifically, the amplified signal may contain various noise and interference. The filtering unit retains useful signal components and removes noise by filtering the signal to improve the signal-to-noise ratio of the signal.

[0072] Output: filtered pure signal.

[0073] AD conversion

[0074] The filtered analog signal is converted into a digital signal.

[0075] Specifically, the filtered analog signal is converted into a digital signal by an AD converter (analog-digital converter). The advantage of the digital signal is that it is convenient for subsequent digital processing and storage.

[0076] Output: The converted digital signal.

[0077] FPGA acquisition and high-speed serial transmission

[0078] The digital signal is collected by FPGA and sent to the host computer through high-speed serial transmission.

[0079] Specifically: FPGA (Field Programmable Gate Array) is responsible for high-speed acquisition of digital signals after AD conversion. The parallel processing capability of FPGA enables it to efficiently process a large amount of data. The collected data is sent to the host computer through a high-speed serial transmission interface, ensuring the real-time and integrity of data transmission.

[0080] Output: The digital signal of light intensity transmitted to the host computer.

[0081] Host computer inversion calculation

[0082] The host computer calculates the atmospheric refractive index structure constant and the sensible heat flux based on the received digital signal and meteorological parameters.

[0083] Specifically: After receiving the digital signal of light intensity, the host computer combines the current meteorological parameters (such as temperature, humidity, air pressure, etc.) and calculates the atmospheric refractive index structure constant through inversion algorithm. This parameter reflects the degree of influence of atmospheric turbulence on light transmission. Further, through these data, the sensible heat flux and latent heat flux of the ground surface can be calculated, which is of great significance to the fields of agriculture, meteorology, etc.

[0084] Output: The calculation results of atmospheric refractive index structure constant and sensible heat flux.

[0085] Result storage and display

[0086] The calculation results are stored and displayed on the host computer interface.

[0087] Specifically: The host computer stores the calculated results in the database for subsequent data analysis and processing. At the same time, the calculation results are displayed in real time through the graphical interface, and users can intuitively view the change trend of atmospheric refractive index structure constant and sensible heat flux.

[0088] Output: The calculation results stored in the database and the real-time data displayed on the host computer interface.

[0089] Eleven implementation modes, combined Figures 1-7 This embodiment describes the above-mentioned technical solutions in further detail through specific examples.

[0090] When the instrument is working, the transmitting end and the receiving end are aligned through a sighting telescope or the like, and part of the coherent light emitted by the light source enters the atmosphere after being modulated, and is received by the receiving end under the influence of atmospheric turbulence. Compared with a traditional light source, the part-coherent light source developed in a specific way not only ensures the effectiveness of far-field light intensity fluctuation variance measurement, but also prolongs the working distance of the device; meanwhile, the modulating function of the light source improves the signal-to-noise ratio of the receiving detector and reduces the measurement error of the device. Under the same atmospheric turbulence conditions, the influence of the medium on the part-coherent light beam is much smaller than that of the fully coherent light beam.

[0091] As shown in Figure 1 After the light emitted by the light source passes through the atmospheric turbulence, the light wave will drift, refract, scatter and the like due to the influence of atmospheric disturbance, which will affect the light beam quality and cause the fluctuation of light intensity, and the receiving end calculates the atmospheric refractive index structure constant according to the received light intensity fluctuation.

[0092] The technical scheme provided by the utility model discloses that the light source adopts array light source, utilizes Van-Citter-Zernike theorem to make it part-coherent light, and the array light beam has higher energy, is less influenced by atmospheric turbulence than single-beam light, has high brightness, long service life, small volume and high efficiency.

[0093] Specifically, the light source power module adopts a DC-DC switching step-down conversion chip XL4015, the input voltage is 8-36V, the output voltage supports any adjustable between 1.25-32V, Vout=1.25*(1+R2 / R1). A 10-15V DC power supply is designed, and a 5V DC power supply is stably output through the step-down conversion chip XL4015 to power each device of the system. A forward low-voltage stabilizer ASM1117-3.3 is used to fixedly output a 3.3V DC power supply to provide working power for the core controller STM32F103ZE.

[0094] The driving module adopts an STM32F103ZE single-chip microcomputer to output a continuous adjustable PWM signal, controls the L298N to output a continuous adjustable PWM signal, so that the brightness of the LED light plate is continuously adjustable.

[0095] In the light source design, the four sub-light sources inside the uniformly distributed light source can make the light source have higher surface uniformity and larger beam divergence angle. Compared with the traditional laser light source, the array light has a larger divergence angle and a uniform light-emitting surface, is better aligned for long-distance measurement, has stronger anti-shaking ability, and has higher atmospheric interference resistance, is more suitable for more extreme environments, and can further improve the accuracy of measurement results.

[0096] The receiving end receives the light source signal transmitted by the transmitting end, amplifies and processes the signal through two-stage amplification and filtering units, converts the analog signal into a digital signal through AD conversion, finally collects and high-speed serially transmits the decoded light intensity value into the upper computer for calculation, and the upper computer inverts and calculates the atmospheric refractive index structure constant and the sensible heat flux with the aid of the received light intensity value signal and meteorological parameters, and stores and displays the atmospheric refractive index structure constant and the sensible heat flux.

[0097] The above further describes the technical solutions provided by the utility model through several specific embodiments, in order to highlight the advantages and beneficial effects of the technical solutions provided by the utility model, but the above several specific embodiments are not used as the limitation of the utility model, any reasonable modification and improvement of the utility model, combination and equivalent replacement of the embodiments, etc. based on the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A partially coherent beacon emitting light source for a large aperture scintillometer, characterized in that, The application relates to a light source, comprising: at least four partial coherent light sources arranged in an array and uniformly spliced; a power module for powering the arrayed partial coherent light sources; the partial coherent light source comprises: four sub-light sources arranged in an array and uniformly arranged on a light source substrate; the sub-light source comprises a bulb and a base, the bulb is mounted on the base, and the base is mounted on the light source substrate.

2. A partially coherent beacon emitting light source for a large aperture scintillometer according to claim 1, characterized in that, The light source substrate is a cuboid structure.

3. A partially coherent beacon emitting light source for a large aperture scintillometer according to claim 1, wherein, The bulb is a sphere.

4. A partially coherent beacon emitting light source for a large aperture scintillometer according to claim 1, wherein, The base is a cuboid structure.

5. A partially coherent beacon emitting light source for a large aperture scintillometer according to claim 1, wherein, The side walls of the light source substrate can be spliced with each other.

6. A partially coherent beacon emitting light source for a large aperture scintillometer according to claim 1, wherein, The emitting light source further comprises a shell, which is movably connected with the base.

7. A partially coherent beacon emitting light source for a large aperture scintillometer according to claim 6, wherein, Two protrusions are arranged on the side walls of the shell, one of which is used for rotating connection with the base, and the other is used for embedding in the long strip-shaped groove of the base and sliding along the groove.

8. A partially coherent beacon emitting light source for a large aperture scintillometer according to claim 7, wherein, The groove is a circular arc-shaped through hole.

9. A large aperture scintillometer characterized by, The application further relates to a light source, which comprises the emitting light source as a light source emitting end and a light source receiving end.

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