Photoelectric backscattering high-concentration sand meter based on integrating sphere

Abstract

The invention discloses a photoelectric backscattering high-concentration sand meter based on an integrating sphere. The photoelectric backscattering high-concentration sand meter comprises a light source module, the integrating sphere, a photoelectric detector and a processing circuit, the light source module is used for providing a light source for photoelectric sand measurement, and emergent light of the light source enters liquid to be measured through a light inlet of the integrating sphere; the integrating sphere is used for collecting backscattered light generated by particles in liquid to be detected; the photoelectric detector is used for detecting the backward scattered light; and the processing circuit is used for processing the electric signal detected by the photoelectric detector and calculating the particle concentration of the liquid to be detected. According to the invention, the back scattering light is collected through the integrating sphere, and reliable detection of the 180-degree back scattering light is ensured, so that high-concentration sand measurement can be carried out. According to the invention, testing hardware equipment and optical equipment are simple, the concentration of the suspended particles is measured by using 180-degree back scattering signals, the measurement accuracy is high, and the measurement range is large.

Description

Technical Field

[0001] The invention belongs to the technical field of sediment online monitoring, in particular to a photoelectric backscattering high-concentration sand measuring instrument based on an integrating sphere. Background Art

[0002] The photoelectric backscatter sand meter is an instrument that uses the relationship between scattered light intensity and particle concentration to measure sand and dust concentration. According to scattering theory, light scattering in sand and dust particles is related to particle diameter and concentration. By measuring the intensity of scattered light, the concentration of sand and dust can be deduced.

[0003] Traditional photoelectric backscattering sand measuring instruments may encounter some problems under high concentration conditions. First, when the dust concentration is high, the scattered light intensity may exceed the instrument's measurement range, causing the instrument to saturate and fail to provide accurate measurement results. Second, the intensity distribution of scattered light in different directions may be uneven, resulting in instability in the measurement results.

[0004] Therefore, it is necessary to design a new type of photoelectric backscattering high-concentration sand meter to solve the problems of traditional sand meters under high-concentration conditions and provide more accurate and stable measurement results. Summary of the invention

[0005] The purpose of the present invention is to address the problems existing in the above-mentioned prior art and to provide a photoelectric backscattering high-concentration sand measuring instrument based on an integrating sphere to accurately measure the flow and sediment distribution of the Yangtze River and the Yellow River in real time.

[0006] The technical solution to achieve the purpose of the present invention is: a photoelectric backscattering high-concentration sand measuring instrument based on an integrating sphere, the sand measuring instrument comprising a light source module, an integrating sphere, a photoelectric detector and a processing circuit;

[0007] The light source module is used to provide a light source for photoelectric sand measurement, and the emitted light of the light source is incident on the liquid to be measured through the light entrance of the integrating sphere;

[0008] The integrating sphere is used to collect backscattered light generated by particles in the liquid to be tested;

[0009] The photoelectric detector is used to detect the backscattered light;

[0010] The processing circuit is used to process the electrical signal detected by the photoelectric detector and calculate the particle concentration of the liquid to be measured.

[0011] Furthermore, the photoelectric detector is installed on the side of the integrating sphere.

[0012] Furthermore, the installation position of the photodetector forms an angle of 90° with the axes of the light entrance and light exit of the integrating sphere.

[0013] Furthermore, the light source module adopts a collimated LED or a laser.

[0014] Furthermore, the laser is an 850nm infrared laser.

[0015] Furthermore, the processing circuit inversely calculates the particle concentration of the liquid to be measured according to the relationship between the pre-generated electrical signal strength and the particle concentration.

[0016] Furthermore, the processing circuit calculates the particle concentration of the liquid to be measured by inverse calculation using a table lookup method.

[0017] Furthermore, the sand measuring instrument also includes a shell for placing the light source module, integrating sphere, photodetector and processing circuit, and the shell is provided with an opening along the light propagation path.

[0018] On the other hand, a measurement method of a photoelectric backscattering high-concentration sand measuring instrument based on an integrating sphere is provided, the method comprising:

[0019] The light source module irradiates the liquid to be tested at a certain angle through an integrating sphere;

[0020] The suspended particles in the liquid to be tested scatter the incident light;

[0021] The backscattered light enters the integrating sphere;

[0022] The photoelectric detector detects the backscattered light entering the integrating sphere;

[0023] The suspended particle concentration is inverted based on the detected light intensity.

[0024] Compared with the prior art, the present invention has the following significant advantages:

[0025] (1) The integrating sphere technology is used to collect relatively ideal 189° backscattered light coaxial with the incident light, thus meeting the needs of high-concentration sand measurement.

[0026] (2) The test hardware and optical equipment of the present invention are simple, and the suspended particle concentration is measured by using 180° backscattered signals, with high measurement accuracy and a large measurement range.

[0027] (3) By using an integrating sphere, the light intensity distribution is more uniform, making the measurement results more accurate and stable.

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the photoelectric backscattering high-concentration sand measuring instrument based on an integrating sphere of the present invention. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0031] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In one embodiment, in combination Figure 1 , provides a photoelectric backscattering high-concentration sand measuring instrument based on an integrating sphere, the sand measuring instrument comprising a light source module, an integrating sphere, a photoelectric detector and a processing circuit;

[0033] The light source module is used to provide a light source for photoelectric sand measurement, and the emitted light of the light source is incident on the liquid to be measured through the light entrance of the integrating sphere;

[0034] The integrating sphere is used to collect backscattered light generated by particles in the liquid to be tested;

[0035] The photoelectric detector is used to detect the backscattered light;

[0036] The processing circuit is used to process the electrical signal detected by the photoelectric detector and calculate the particle concentration of the liquid to be measured.

[0037] Here, the traditional photoelectric backscattering sand meter determines the concentration by measuring the scattered light intensity of sand particles in the medium. However, in the case of high concentration, the traditional sand meter may encounter some challenges, such as excessive light intensity causing instrument saturation or inaccurate measurement results. The photoelectric backscattering high-concentration sand meter based on the integrating sphere of the present invention solves the above problems by introducing the device of integrating sphere. The integrating sphere is a spherical structure with high reflectivity, which is widely used in the field of optics for light intensity homogenization and light energy collection. In the photoelectric backscattering high-concentration sand meter based on the integrating sphere, the integrating sphere is introduced to collect scattered light. The integrating sphere can evenly disperse the incident light in all directions inside the sphere, and evenly collect the backscattered light, thereby providing more accurate and stable measurement results.

[0038] Preferably, in one of the embodiments, the photodetector is installed on the side of the integrating sphere.

[0039] Preferably, in one of the embodiments, the installation position of the photodetector forms an angle of 90° with the axes of the light entrance and light exit of the integrating sphere.

[0040] Preferably, in one of the embodiments, the light source module adopts but is not limited to a collimated LED or a laser.

[0041] Preferably, in one of the embodiments, the laser is an 850nm infrared laser.

[0042] Preferably, in one of the embodiments, the processing circuit inversely calculates the particle concentration of the liquid to be measured based on the relationship between the pre-generated electrical signal intensity and the particle concentration.

[0043] Preferably, in one embodiment, the processing circuit calculates the particle concentration of the liquid to be measured by inverse calculation using a table lookup method.

[0044] Preferably, in one of the embodiments, the sand measuring instrument further comprises a shell for placing the light source module, integrating sphere, photodetector and processing circuit, and an opening is provided on the shell along the light propagation path.

[0045] In one embodiment, a measurement method of a photoelectric backscattering high-concentration sand measuring instrument based on an integrating sphere is provided, the method comprising:

[0046] The light source module irradiates the liquid to be tested at a certain angle through an integrating sphere;

[0047] The suspended particles in the liquid to be tested scatter the incident light;

[0048] The backscattered light enters the integrating sphere;

[0049] The photoelectric detector detects the backscattered light entering the integrating sphere;

[0050] The suspended particle concentration is inverted based on the detected light intensity.

[0051] In one embodiment, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the functions of a photoelectric backscattering high-concentration sand measuring instrument based on an integrating sphere when executing the computer program (parts of which may be implemented through simulation).

[0052] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the functions of a photoelectric backscattering high-concentration sand measuring instrument based on an integrating sphere are realized (the components of which can be realized by simulation).

[0053] The present invention is an improved sand measuring instrument that can provide more accurate and stable measurement results under high concentration conditions. The test hardware and optical equipment are simple, and the suspended particle concentration is measured using 180° backscattered signals, with high measurement accuracy and a large measurement range.

[0054] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A photoelectric backscattering high-concentration sand measuring instrument based on an integrating sphere, characterized in that: The sand measuring instrument comprises a light source module, an integrating sphere, a photoelectric detector and a processing circuit; The light source module is used to provide a light source for photoelectric sand measurement, and the emitted light of the light source is incident on the liquid to be measured through the light entrance of the integrating sphere; The integrating sphere is used to collect backscattered light generated by particles in the liquid to be tested; The photoelectric detector is used to detect the backscattered light; The processing circuit is used to process the electrical signal detected by the photoelectric detector and calculate the particle concentration of the liquid to be measured.

2. The photoelectric backscattering high-concentration sand measuring instrument based on an integrating sphere according to claim 1, characterized in that: The photoelectric detector is installed on the side of the integrating sphere.

3. The photoelectric backscattering high-concentration sand measuring instrument based on an integrating sphere according to claim 1, characterized in that: The installation position of the photoelectric detector forms an angle of 90° with the axes of the light entrance and light exit of the integrating sphere.

4. The photoelectric backscattering high-concentration sand measuring instrument based on an integrating sphere according to claim 1, characterized in that: The light source module adopts a collimated LED or a laser.

5. The photoelectric backscattering high-concentration sand measuring instrument based on an integrating sphere according to claim 4, characterized in that: The laser is an 850nm infrared laser.

6. The photoelectric backscattering high-concentration sand measuring instrument based on an integrating sphere according to claim 1, characterized in that: The processing circuit inversely calculates the particle concentration of the liquid to be measured based on the relationship between the pre-generated electrical signal strength and the particle concentration.

7. The photoelectric backscattering high-concentration sand measuring instrument based on an integrating sphere according to claim 6, characterized in that: The processing circuit inversely calculates the particle concentration of the liquid to be measured by a table lookup method.

8. The photoelectric backscattering high-concentration sand measuring instrument based on an integrating sphere according to claim 1, characterized in that: The sand measuring instrument also includes a shell for accommodating the light source module, the integrating sphere, the photoelectric detector and the processing circuit, and the shell is provided with an opening along the light propagation path.

9. The measurement method of the photoelectric backscattering high-concentration sand measuring instrument based on an integrating sphere according to any one of claims 1 to 8, characterized in that: The method comprises: The light source module irradiates the liquid to be tested at a certain angle through an integrating sphere; The suspended particles in the liquid to be tested scatter the incident light; The backscattered light enters the integrating sphere; The photoelectric detector detects the backscattered light entering the integrating sphere; The suspended particle concentration is inverted based on the detected light intensity.

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