CN212206249U - Capacity detection device based on optical refraction principle - Google Patents
Capacity detection device based on optical refraction principle Download PDFInfo
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- CN212206249U CN212206249U CN202021066578.4U CN202021066578U CN212206249U CN 212206249 U CN212206249 U CN 212206249U CN 202021066578 U CN202021066578 U CN 202021066578U CN 212206249 U CN212206249 U CN 212206249U
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Abstract
The utility model discloses a capacity detection device based on optical refraction principle, which comprises a light-transmitting container for containing solution, an optical component for sensing whether the solution exists in the light-transmitting container and a height detection component for acquiring the position of the optical component, wherein the optical component and the height detection component are both arranged outside the light-transmitting container; the optical assembly comprises at least one optical mark and at least one optical sensor matched and corresponding to the optical mark, and light rays emitted by the optical mark pass through the side wall of the light-transmitting container at least twice and are finally received by the optical sensor; when the light emitted by the optical mark passes through the side wall of the light-transmitting container, the incident included angle between at least one light and the side wall of the light-transmitting container is not a right angle. The utility model discloses a non-contact's mode utilizes the optics refraction principle to realize the container capacity real-time detection to the inside splendid attire corrosive solution.
Description
Technical Field
The utility model relates to a detection device, concretely relates to volume detection device based on optics refraction principle to specific structure, special use's container belongs to optics and detects technical field.
Background
In recent years, with the continuous improvement of the whole industrial production level of China, the research and development and production of various devices and equipment related to the daily life of residents are greatly improved compared with the prior art. Taking the equipment such as air purifier, air sterilizing machine that receive the higher degree of attention at present as an example, owing to receiving the influence of market demand and trade technical renewal, this type of equipment on the market now is various and mostly all integrates various special functions on its function implementation.
Liquid vaporization disinfection is a common technical implementation means in an air disinfection machine, and the action principle of the liquid vaporization disinfection is to vaporize liquid hydrogen peroxide or other liquid with disinfection effect and then diffuse the vaporized liquid into the environment along with air flow to complete sterilization and disinfection.
In the process of vaporizing the liquid, if the volume of the liquid can be known accurately in real time, the whole sterilizing process can be controlled accurately, the better using effect of the equipment can be achieved, and the better user experience can be obtained. However, conventional touch sensors are not suitable for use in such devices because of the corrosive nature of solutions such as hydrogen peroxide. In this regard, under the existing technical conditions, the solution used by most equipment manufacturers is to use a container with a certain transparency to hold the solution, and mark corresponding scales on the container to reflect the volume of the liquid in the container. As is known in the art, when light passes through a transparent medium, refraction and displacement occur, and therefore, the amount of liquid in the container reflected by the scale is easily affected by the personal experience of the observer, the observation angle, and the like, and the observation result is inaccurate.
In order to avoid the above problems, some equipment manufacturers have mounted an imaging device for observing the liquid level in the container in real time, and have combined image processing technology to obtain real-time images to calculate the liquid volume in the container. However, in the actual operation process, the skilled person finds that such a technical implementation cannot achieve the expected effect, and the technical defects are mainly reflected in two aspects: first, the accuracy of the conventional imaging means is limited, and the acquisition of the liquid level in the container has a considerable error, which leads to an error in the final result. Secondly, even if the precision of the camera shooting component is enough to obtain the accurate liquid level height in the container, a final result is required to be obtained, and a very complex image processing algorithm is required to support, so that certain difficulty is brought to the final realization of the technology undoubtedly.
In summary, how to design a new capacity detection device based on the optical refraction principle for a container with a specific structure and a special purpose by combining the existing technical solutions to solve the above drawbacks of the prior art becomes a common concern of those skilled in the art.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention provides a capacity detecting device based on the optical refraction principle for a specific structure and special purpose container, as follows.
A capacity detection device based on an optical refraction principle comprises a light-transmitting container for containing solution, an optical component for sensing whether the solution exists in the light-transmitting container and a height detection component for sensing the height of the solution in the light-transmitting container, wherein the optical component and the height detection component are both arranged outside the light-transmitting container;
the optical assembly comprises at least one optical mark capable of emitting light actively or emitting light passively in a reflection mode and at least one optical sensor matched and corresponding to the optical mark, and light rays emitted by the optical mark pass through the side wall of the light-transmitting container at least twice and are finally received by the optical sensor;
when the light rays emitted by the optical mark pass through the side wall of the light-transmitting container, the incident included angle between the light rays and the side wall of the light-transmitting container is a non-right angle at least once.
Preferably, the overall shape of the light-transmitting container is a prism or a cylinder.
Preferably, the optical mark is an active light-emitting source or a passive light-reflecting mark; the optical marks are in the shape of dots or stripes.
Preferably, the optical sensor is any one of a camera, a photodiode, an infrared sensor, and a color sensor.
Preferably, the optical mark is provided on an outer peripheral side of the light-transmitting container in correspondence with the optical sensor;
when the signal emitting end of the optical mark and the signal receiving end of the optical sensor are not directly opposite, the capacity detection device based on the optical refraction principle further comprises at least one light path reflection component for realizing light reflection, the light path reflection component is fixedly arranged outside the light-transmitting container, and light emitted by the signal emitting end of the optical mark passes through the side wall of the light-transmitting container, is reflected by the light path reflection component and is received by the signal receiving end of the optical sensor;
the light path reflecting component is any one of a plane reflecting mirror, a convex reflecting mirror and a concave reflecting mirror.
Preferably, the optical mark is a strip-shaped active light source, the optical sensor is a camera, the optical mark is fixedly connected with the optical sensor through a connecting component, a signal emitting end of the optical mark and a signal receiving end of the optical sensor are arranged in the same direction, a plane mirror is fixedly arranged outside the transparent container and at a position opposite to the optical mark and the optical sensor, and light emitted from the signal emitting end of the optical mark passes through a side wall of the transparent container, is reflected by the plane mirror and is received by the signal receiving end of the optical sensor.
Preferably, the optical sensor is in signal connection with the height detection component, the height detection component is an image processing module for acquiring a real-time detection image from the optical sensor and performing an image processing operation, and an output of the image processing module is in signal connection with a result output unit outside the device.
Preferably, the optical mark is a strip-shaped bicolor light source, one section of the optical mark is a reference section, the other section of the optical mark is a detection section, the length of the reference section is a fixed value, and the level height of the lowest point of the reference section is higher than the highest level height of the solution in the light-transmitting container;
when the optical sensor acquires a real-time detection image, the reference segment of the optical mark is completely presented in the image.
Preferably, still including being used for driving optical component follows the printing opacity container outside carries out the motion subassembly of vertical direction removal, the motion subassembly includes one along the vertical direction, set up in the movable guide rail of printing opacity container's outside and one movably set up in movable slide on the movable guide rail.
Preferably, the optical mark is a point-shaped active light-emitting source, the optical mark and the optical sensor are both arranged on the movable slider, a signal emitting end of the optical mark and a signal receiving end of the optical sensor are oppositely arranged and located in the same horizontal plane, and light emitted by the optical mark passes through the side wall of the light-transmitting container and is received by the optical sensor.
Preferably, the optical sensor is in signal connection with the height detection assembly, the height detection assembly is a stepping motor for driving the movable sliding block to move, an output shaft of the stepping motor is fixedly connected with the movable sliding block, the stepping motor is in signal connection with a distance detection module for acquiring the running distance of the stepping motor in real time, and the output of the distance detection module is in signal connection with a result output unit outside the device.
The utility model has the advantages that the following aspects are mainly embodied:
the utility model provides a capacity detection device, through non-contact's mode, utilize the optics refraction principle, combine the container of specific structure, realized the container capacity real-time detection to inside splendid attire corrosive solution. And simultaneously, the utility model discloses a technique realization means has reduced ubiquitous detection error among the prior art relatively simply, to the at utmost, and the device testing result is accurate, can realize to vaporization disinfection process's accurate control, obtain good user and use experience.
The utility model discloses an among the hardware structure, function implementation and part apolegamy combination are various, and the operator can carry out the free choice according to the convenient degree that actual use needs and part acquireed, also can acquire through the appropriate change to current equipment the utility model discloses a hardware equipment, the manufacturing cost of product is lower relatively, establish the basis for subsequent technological popularization.
The utility model discloses a device application scope is wide, the suitability is strong, can migrate it, use to all kinds of relevant equipment in. The utility model discloses a relevant research and application of this kind of optical detection technique provide can a brand-new thinking, for providing the reference with other relevant problems in the field, can extend and deep research for this is based on, have very wide application prospect.
The following detailed description is made of specific embodiments of the present invention with reference to the accompanying drawings, so as to make the technical solution of the present invention easier to understand and master.
Drawings
FIG. 1 is one of the design schematic illustrations of the present invention;
FIG. 2 is a second schematic diagram illustrating the design of the present invention;
fig. 3 is a schematic diagram of a hardware structure according to embodiment 1 of the present invention;
fig. 4 is a schematic diagram of a hardware structure according to embodiment 2 of the present invention.
Wherein: 1. a light-transmissive container; 2. an optical marker; 3. an optical sensor; 4. a planar mirror.
Detailed Description
The utility model discloses a to the volume detection device based on optics refraction principle of the container of specific structure, special use.
First, explaining the design principle of the present invention, fig. 1 shows a schematic cross-sectional view of an empty transparent container, and it is assumed that in an air environment, from a mark point to an observation point, light rays can pass through five different layers of materials, such as air, a container wall, materials inside the container, the container wall, and air. At the interface of two different substances, the light can be refracted, and the ratio of the sine value of the incident angle to the sine value of the refraction angle is equal to the ratio of the light speed of the light in the two substances and also equal to the ratio of the refractive indexes of the two substances. For visible light, the refractive index of air is about 1.0, the refractive index of water is about 1.33, and the refractive index of glass is about 1.5.
For the configuration of fig. 1, the marking point and the observation point a are both located at the side of the container and the line connecting them makes an angle of 45 ° with the container wall. According to the refraction principle, after four times of refraction, the light is observed to the container along the direction of 45 degrees at the observation point A, and the container can be just optically marked. The observation point C is right opposite to the mark point, and the light directly passes through the observation point C according to the refraction principle and directly faces the container wall to observe, so that the mark point can be just seen.
Fig. 2 is a schematic cross-sectional view of a transparent container containing a liquid, where the refraction of light within the container will change significantly when the material within the container has a refractive index substantially different from the material outside the container. Thus, when the observation point A is observed towards the original angle, the mark point can not be seen. And the mark point can be seen by observing the point B at the new position.
From the above principle, it can be seen that, if the position of the marking point and the observation point a is fixed, whether the container contains the substance can be detected based on whether the marking point can be observed from the observation point a. It is based on the principle of above-mentioned optical refraction too, a capacity detection device based on optical refraction principle, concrete scheme as follows.
The capacity detection device based on the optical refraction principle comprises a light-transmitting container 1 for containing solution, an optical component for sensing whether the solution in the light-transmitting container 1 exists or not and a height detection component for sensing the height of the solution in the light-transmitting container 1, wherein the optical component and the height detection component are both arranged outside the light-transmitting container 1.
The optical assembly comprises at least one optical mark 2 capable of emitting light actively or emitting light by passive reflection and at least one optical sensor 3 matched and corresponding to the optical mark 2, wherein light emitted by the optical mark 2 passes through the side wall of the light-transmitting container 1 at least twice and is finally received by the optical sensor 3. The arrangement of the optical marking 2 and the optical sensor 3 can be such that the optical sensor 3 is aligned with the light emitted by the optical marking 2 when the light-transmitting container 1 is empty.
When the light emitted by the optical mark 2 passes through the side wall of the light-transmitting container 1, the incident included angle between the light and the side wall of the light-transmitting container 1 is a non-right angle at least once.
The overall shape of the transparent container 1 is various, and may be a prism or a cylinder, which is not limited herein.
Similarly, the optical mark 2 may be implemented in various forms, such as an active light source or a passive reflective mark, or a light source that actively emits a specific frequency or a light source that actively emits a specific code. In terms of shape, the optical markers 2 may be in the form of dots or stripes.
The optical sensor 3 is any one of a camera, a photodiode, an infrared sensor and a color sensor.
It should be noted here that, in order to enhance the anti-interference capability of the active light source in a complex environment, the optical marker 2 may be a light source that actively emits a specific code, and at this time, the device should further include an encoding module and a decoding module, where the encoding module is electrically connected to the optical marker 2 to generate a corresponding code for displaying the optical marker 2, and the decoding module is electrically connected to the optical sensor 3 to decode a signal received by the optical sensor 3.
In a further refinement, when the optical marker 2 is a light source that actively emits a specific frequency, if the device of the optical marker 2 is a photodiode, the frequency range of the emitted light is typically in the range of a dozen Hz to tens of thousands Hz. The optical sensor 3 detects light of sufficient intensity at the same frequency at the same time, and then it is considered that the light emitted from the optical mark 2 is received. On the basis, the frequency change of the added light source forms a specific digital code, so that the anti-interference performance of the device is stronger.
If the device of the optical sensor 3 is selected as a camera, the light emitting frequency of the optical mark 2 generally must not exceed one half of the number of sampling frames, and is most preferably less than one quarter, for example, 1Hz to 12Hz is selected. The optical sensor 3 judges whether the frequency of the light is emitted by the optical mark 2 according to each frame of collected image.
When the optical mark 2 is a light source that actively emits a specific code, that is, the optical mark 2 emits light of a specific color or light of a specific mode change color, if the device of the optical mark 2 is a light emitting component such as a color light emitting diode, it should emit light of a color that is not likely to appear in the environment. For example, when the light-transmitting container 1 contains red liquid under natural light detection, green or blue light can be emitted. The optical mark 2 can also be controlled by a circuit to emit light of different colors in different time periods, such as the generation of alternate colors of red, green and blue, and the optical sensor 3 correspondingly detects corresponding colors, and if the detection result is obtained, the light emitted by the optical mark 2 is considered to be received.
The optical mark 2 is provided on the outer peripheral side of the light-transmitting container 1 in correspondence with the optical sensor 3. When arranged, the optical mark 2 and the optical sensor 3 can be tightly attached to the wall of the transparent container 1, so that the refraction times on the whole optical path can be reduced, but the physical principle of refraction is not changed, and the above detection principle is also applicable.
It should be emphasized that, when the signal emitting end of the optical mark 2 and the signal receiving end of the optical sensor 3 are not directly opposite to each other, the capacity detecting device based on the optical refraction principle further includes at least one light path reflecting component for reflecting light, the light path reflecting component is fixedly disposed outside the light-transmitting container 1, and the light emitted from the signal emitting end of the optical mark 2 passes through the sidewall of the light-transmitting container 1, is reflected by the light path reflecting component, and is received by the signal receiving end of the optical sensor 3.
The light path reflecting component is any one of a plane reflecting mirror, a convex reflecting mirror and a concave reflecting mirror.
The function of the optical path reflection component also comprises expanding the optical path and prolonging the detection distance of light from the optical mark 2 to the optical sensor 3, thereby improving the observation visual angle of the optical sensor 3. If the optical sensor 3 is a camera, the angle of the camera may not cover the whole optical mark 2 under the condition of a narrow space position, and at this time, the problem can be solved by adding the light path reflecting component to extend the light path.
Two specific examples are provided below in conjunction with the above technical solutions.
In embodiment 1, as shown in fig. 3, the optical mark 2 is a strip-shaped active light source, the optical sensor 3 is a camera, the optical mark 2 is fixedly connected to the optical sensor 3 through a connecting member, a signal emitting end of the optical mark 2 and a signal receiving end of the optical sensor 3 are arranged in the same direction, a planar mirror 4 is fixedly arranged outside the transparent container 1 at a position opposite to the optical mark 2 and the optical sensor 3, and light emitted from the signal emitting end of the optical mark 2 passes through a sidewall of the transparent container 1, is reflected by the planar mirror 4, and is received by the signal receiving end of the optical sensor 3.
The optical sensor 3 is in signal connection with the height detection component, the height detection component is an image processing module used for acquiring a real-time detection image from the optical sensor 3 and executing image processing operation, and the output of the image processing module is in signal connection with a result output unit outside the device.
The optical mark 2 is a strip-shaped two-color light source, one section of the optical mark 2 is a reference section, the other section of the optical mark is a detection section, the length of the reference section is a fixed value, and the height of the horizontal plane where the lowest point of the reference section is located is higher than the height of the highest liquid level of the solution in the light-transmitting container 1. It is emphasized here that the reference segment of the optical mark 2 is completely present in the image when the optical sensor 3 acquires the real-time detection image.
In this solution, with a self-calibration operation, if the light-transmitting container 1 contains a solution, the light beam will be shifted in the portion where the solution exists, and at the liquid level position, the image of the detection segment of the optical mark 2 will be separated, shifted, etc. in the image obtained by the optical sensor 3. In the real-time detection image obtained by the optical sensor 3, the reference segment of the optical mark 2 is completely presented in the image, and the length of the reference segment of the optical mark 2 can be determined during setting and is not affected by the position of the liquid level, so that the image processing module can obtain the length of the part, which does not deviate above the liquid level, of the detection segment of the optical mark 2 by conversion of equal proportion/equal length according to the length of the reference segment of the optical mark 2 as a reference during image processing.
Meanwhile, for the above scheme, there is an alternative operation, that is, the optical mark 2 itself is composed of a plurality of short color bars with different colors and accurate lengths, or the optical mark 2 is provided with a clearly-recognizable scale of the optical sensor 3. The short color bars or scales are compared with a ruler, so that the optical sensor 3 can directly know each segment of the color bars or scales and further calculate the actual length of the visible part of the light bar. However, when the scheme is implemented by using scales, each scale needs to be marked clearly and distinguishably, which has high requirements on the precision, the algorithm complexity, the environment and the like of the camera component.
The optical mark 2 is a point-shaped active light source, the optical mark 2 and the optical sensor 3 are both arranged on the movable slider, a signal emitting end of the optical mark 2 and a signal receiving end of the optical sensor 3 are oppositely arranged and located in the same horizontal plane, and light emitted by the optical mark 2 passes through the side wall of the light-transmitting container 1 and then is received by the optical sensor 3.
The optical sensor 3 is in signal connection with the height detection assembly, the height detection assembly is a stepping motor used for driving the movable sliding block to move, an output shaft of the stepping motor is fixedly connected with the movable sliding block, the stepping motor is in signal connection with a distance detection module used for acquiring the running distance of the stepping motor in real time, and the output of the distance detection module is in signal connection with a result output unit outside the device.
In this scheme, since the moving distance of the stepping motor is controllable and can be directly known, when the stepping motor drives the optical mark 2 and the optical sensor 3 to move, the liquid level inside the transparent container 1 can be accurately found only by the deviation of light, and then the volume of the liquid inside the transparent container 1 can be directly known by recording the moving distance of the stepping motor at this time.
To sum up, the utility model provides a capacity detection device utilizes optics refraction principle, combines the container of particular structure through non-contact's mode, has realized the container capacity real-time detection to inside splendid attire corrosive solution. And simultaneously, the utility model discloses a technique realization means has reduced ubiquitous detection error among the prior art relatively simply, to the at utmost, and the device testing result is accurate, can realize to vaporization disinfection process's accurate control, obtain good user and use experience.
The utility model discloses an among the hardware structure, function implementation and part apolegamy combination are various, and the operator can carry out the free choice according to the convenient degree that actual use needs and part acquireed, also can acquire through the appropriate change to current equipment the utility model discloses a hardware equipment, the manufacturing cost of product is lower relatively, establish the basis for subsequent technological popularization.
Furthermore, the utility model discloses a device application scope is wide, the suitability is strong, can migrate it, use to all kinds of relevant equipment in. The utility model discloses a relevant research and application of this kind of optical detection technique provide a brand-new thinking, for providing the reference with other relevant problems in the field, can use this to extend and deep research for the foundation, have very wide application prospect.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Finally, it should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should integrate the description, and the technical solutions in the embodiments can be appropriately combined to form other embodiments understood by those skilled in the art.
Claims (11)
1. A capacity detection device based on the optical refraction principle is characterized in that: the device comprises a transparent container (1) for containing solution, an optical component for sensing the existence of the solution in the transparent container (1) and a height detection component for sensing the height of the solution in the transparent container (1), wherein the optical component and the height detection component are both arranged outside the transparent container (1);
the optical assembly comprises at least one optical mark (2) capable of emitting light actively or passively in a reflection mode and at least one optical sensor (3) matched and corresponding to the optical mark (2), and light rays emitted by the optical mark (2) pass through the side wall of the light-transmitting container (1) at least twice and are finally received by the optical sensor (3);
when the light rays emitted by the optical mark (2) pass through the side wall of the light-transmitting container (1), the incident included angle between the light rays and the side wall of the light-transmitting container (1) is a non-right angle at least once.
2. A capacity detecting apparatus based on the optical refraction principle as claimed in claim 1, wherein: the overall shape of the light-transmitting container (1) is a prism or a cylinder.
3. A capacity detecting apparatus based on the optical refraction principle as claimed in claim 1, wherein: the optical mark (2) is an active light-emitting source or a passive light-reflecting mark; the optical mark (2) is in a dot shape or a strip shape.
4. A capacity detecting apparatus based on the optical refraction principle as claimed in claim 1, wherein: the optical sensor (3) is any one of a camera, a photodiode, an infrared sensor and a color sensor.
5. A capacity detecting apparatus based on the optical refraction principle as claimed in claim 1, wherein: the optical mark (2) is provided on the outer peripheral side of the light-transmitting container (1) in correspondence with the optical sensor (3);
when the signal emitting end of the optical mark (2) and the signal receiving end of the optical sensor (3) are not directly opposite, the capacity detection device based on the optical refraction principle further comprises at least one light path reflection component for realizing light reflection, the light path reflection component is fixedly arranged outside the light-transmitting container (1), and light emitted by the signal emitting end of the optical mark (2) passes through the side wall of the light-transmitting container (1), is reflected by the light path reflection component and is received by the signal receiving end of the optical sensor (3);
the light path reflecting component is any one of a plane reflecting mirror, a convex reflecting mirror and a concave reflecting mirror.
6. The optical refraction principle-based capacity detecting device according to claim 5, wherein: the optical mark (2) is a strip-shaped active light-emitting source, the optical sensor (3) is a camera, the optical mark (2) is fixedly connected with the optical sensor (3) through a connecting component, a signal emitting end of the optical mark (2) and a signal receiving end of the optical sensor (3) are arranged in the same direction, a planar reflector (4) is fixedly arranged outside the light-transmitting container (1) and at a position opposite to the optical mark (2) and the optical sensor (3), and light emitted by the signal emitting end of the optical mark (2) penetrates through the side wall of the light-transmitting container (1), is reflected by the planar reflector (4) and is received by the signal receiving end of the optical sensor (3).
7. The optical refraction principle-based capacity detecting device according to claim 6, wherein: the optical sensor (3) is in signal connection with the height detection assembly, the height detection assembly is an image processing module used for acquiring a real-time detection image from the optical sensor (3) and executing image processing operation, and the output of the image processing module is in signal connection with a result output unit outside the device.
8. A capacity detecting apparatus based on the optical refraction principle according to claim 7, wherein: the optical mark (2) is a strip-shaped two-color light source, one section of the optical mark (2) is a reference section, the other section of the optical mark is a detection section, the length of the reference section is a fixed value, and the height of the horizontal plane where the lowest point of the reference section is located is higher than the height of the highest liquid level of the solution in the light-transmitting container (1);
when the optical sensor (3) acquires a real-time detection image, the reference segment of the optical marker (2) is completely represented in the image.
9. The optical refraction principle-based capacity detecting device according to claim 5, wherein: still including being used for driving optical component follows the printing opacity container (1) outside carries out the motion subassembly that the vertical direction removed, the motion subassembly include one along the vertical direction, set up in the movable guide of the outside of printing opacity container (1) and one movably set up in movable slide on the movable guide.
10. A capacity detecting apparatus based on the optical refraction principle according to claim 9, wherein: the optical mark (2) is a point-shaped active light-emitting source, the optical mark (2) and the optical sensor (3) are both arranged on the movable sliding block, a signal sending end of the optical mark (2) and a signal receiving end of the optical sensor (3) are oppositely arranged and are positioned in the same horizontal plane, and light rays sent by the optical mark (2) penetrate through the side wall of the light-transmitting container (1) and then are received by the optical sensor (3).
11. The optical refraction principle-based capacity sensing device according to claim 10, wherein: the optical sensor (3) is in signal connection with the height detection assembly, the height detection assembly is a stepping motor used for driving the movable sliding block to move, an output shaft of the stepping motor is fixedly connected with the movable sliding block, the stepping motor is in signal connection with a distance detection module used for acquiring the running distance of the stepping motor in real time, and the output of the distance detection module is in signal connection with a result output unit outside the device.
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