阅读说明：本技术 一种对火星探测器太阳能帆板进行除尘的方法 (Method for removing dust of solar sailboard of Mars detector ) 是由 罗青 刘畅 周国华 段富强 聂云清 张涵 周利霖 于 2021-07-22 设计创作，主要内容包括：本申请提供一种对火星探测器太阳能帆板进行除尘的方法,在火星探测器上设置有检测装置,将除尘装置安装在火星探测器的太阳能帆板上,将除尘控制装置安装在火星探测器主体内部,除尘控制装置用于控制除尘装置对太阳能帆板除尘,太阳能帆板通过连接装置与火星探测器主体相连。本申请的对火星探测器太阳能帆板进行除尘的方法能及时清除火星探测器器太阳能帆板上的尘埃,确保太阳能帆板的转换效率处于高效状态,提高了火星探测器的使用寿命。(The application provides a method for removing dust of a solar array panel of a Mars detector, wherein a detection device is arranged on the Mars detector, a dust removal device is installed on the solar array panel of the Mars detector, a dust removal control device is installed inside a Mars detector main body and used for controlling the dust removal device to remove dust of the solar array panel, and the solar array panel is connected with the Mars detector main body through a connecting device. The method for removing dust from the solar sailboard of the Mars detector can timely remove dust on the solar sailboard of the Mars detector, ensure that the conversion efficiency of the solar sailboard is in a high-efficiency state, and prolong the service life of the Mars detector.)

1. A method for removing dust of a solar array panel of a Mars probe is characterized by comprising the following steps: the method comprises the following steps:

1) the method comprises the following steps that a detection device is arranged on a Mars detector, a dust removal device is installed on a solar sailboard of the Mars detector, a dust removal control device is installed inside a Mars detector main body and used for controlling the dust removal device to remove dust from the solar sailboard, and the solar sailboard is connected with the Mars detector main body through a connecting device;

2) the photosensitive sensor in the detection device detects the light energy receiving quantity of the solar sailboard in unit area in real time and transmits the light energy receiving quantity to the core processor of the dust removal control device, the core processor calculates the dust falling quantity of the solar sailboard and the working efficiency of the solar sailboard, and the working efficiency of the solar sailboard is as follows:

wherein S1 is the total light receiving area of the solar sailboard, S2 is the dust falling area of the solar sailboard, and S3 is the residual light receiving area of the solar sailboard;

3) if the working efficiency of the solar sailboard is lower than 50%, the dust removal control device controls the dust removal device to start working, the solar sailboard is in a horizontal state at the moment, a piezoelectric acoustic transducer in the dust removal device generates high-frequency sound waves to act on the solar sailboard, the sound waves directly act on the Mars dust particles on the solar sailboard by taking the surface acoustic wave effect as an action principle, and meanwhile, the wing panel of the solar sailboard is excited to generate micro-vibration to excite the falling dust vibration and flying to separate from the wing surface of the solar sailboard;

4) the solar sailboard is in a vertical state by rotating the rotating shaft of the solar sailboard, and the dust wing separation is promoted under the action of the gravity of the mars by taking the sound wave agglomeration effect as an action principle; meanwhile, a wind speed sensor in the detection device is started, when the wind speed near the Mars detector is lower than 5m/s, the direction of a piezoelectric-electroacoustic transducer is adjusted to control the direction of a rotating shaft, so that the piezoelectric-electroacoustic transducer is perpendicular to the airfoil of the solar array, the working state of the piezoelectric-electroacoustic transducer is adjusted, low-frequency sound waves are generated by the piezoelectric-electroacoustic transducer and act on dust suspended in the air near the solar array, a strong sound field enables Mars dust aerosol fine particles in the ambient air where the solar array is located to move relatively to improve the collision probability among the particles, the particles can be condensed into particles with larger sizes under the action of Van der Waals force and electrostatic force after collision, high-frequency collision is carried out in a short time, the particle size is increased continuously, and finally the dissipation of the Mars dust due to the acoustic wave agglomeration effect is completed through gravity settling;

5) through the action of the acoustic surface waves and the acoustic wave agglomeration, the solar sailboard of the Mars detector completes dust removal work.

2. The method for dedusting a Mars probe solar array as claimed in claim 1, wherein the method comprises the following steps: the dust removal device is a piezoelectric-electric transducer which is used for generating sound waves, and the piezoelectric-electric transducers are arranged on two sides of the solar sailboard.

3. The method for dedusting a Mars probe solar array as claimed in claim 1, wherein the method comprises the following steps: the detection device comprises a photosensitive sensor and a wind speed sensor, the photosensitive sensor is used for measuring the light receiving performance of the solar sailboard and judging the dust falling degree of the airfoil of the solar sailboard, the wind speed sensor is installed on the outer surface of the main body of the Mars detector, and the photosensitive sensor is installed on the lower side of the solar sailboard.

4. The method for dedusting a Mars probe solar array as claimed in claim 1, wherein the method comprises the following steps: the connecting device is a solar array rotating shaft, and the direction of the solar array is adjusted through the solar array rotating shaft.

5. The method for dedusting a Mars probe solar array as claimed in claim 1, wherein the method comprises the following steps: the dust removal control device comprises a control module and a core processor, wherein the control module and the core processor are both installed inside the mars detector main body, and the core processor is used for receiving wind speed information, sound wave action time and rotation time of the solar sailboard.

6. The method for dedusting a Mars probe solar array as claimed in any one of claims 1-5, wherein: 3-4 piezoelectric acoustic transducers are respectively arranged on two sides of each solar panel, directional horns are arranged on the acoustic transducers, a direction control rotating shaft is arranged at the joint of the lower part of the acoustic transducers and the solar panels, and the direction control rotating shaft is changed into an angle under the action of the control module.

7. The method for dedusting a Mars probe solar array as claimed in any one of claims 1-5, wherein: the Mars detector also comprises a maneuvering system, the lower side of the Mars detector main body is connected with the maneuvering system, and the maneuvering system can realize that the Mars detector is fixed on the ground or moves forwards.

Technical Field

The application relates to the technical field of dust removal of solar sailboards of Mars detectors, in particular to a method for removing dust of the solar sailboards of the Mars detectors.

Background

The Mars detector adopts solar battery wings, namely a solar sailboard to provide electric energy. The fierce spark storm often appears on the sparks, and the whole sparks are diffused with spark dust under the action of the spark wind. The mars dust can accumulate on the solar sailboard through the action of van der waals force and electrostatic force, so that the performance of the battery is reduced. The testing result of Mars developer (Mars Pathfinger) shows that: dust that accumulates and adheres to the solar sailboards decreases the conversion efficiency of the solar sailboards by about 0.28% per Mars day. After 2 years, the electrical performance of the solar sailboard is estimated to be reduced by 22-89%. In order to ensure the working life of the Mars detector, the Mars dust accumulated on the surface of the solar sail panel must be removed.

The existing dust removal modes mainly comprise wind dust removal, scraper brush dust removal and electromagnetic dust removal. Firstly, the wind power dust removal reliability is not high, and the wind power dust removal is not suitable for the severe environmental conditions of mars. The scraper brush removes dust, and the structure is complicated, and life is short. In addition, the electromagnetic dust removal effect is poor, and the controllability is poor.

Disclosure of Invention

In order to solve the technical problems, the application applies sound wave energy to the solar sailboard of the Mars detector, and provides a method for removing dust of the solar sailboard of the Mars detector.

This application has two kinds of dust removal modes through the cooperation mode of two kinds of sound waves and solar array.

The first dust removal mode uses the surface acoustic wave effect as a function principle. The piezoelectric electroacoustic transducer generates high-frequency sound waves, the frequency range of the high-frequency sound waves is 20-80 kHz, the high-frequency sound waves directly act on Mars dust particles and simultaneously excite a solar panel to generate micro vibration, the attachment relation between the dust particles and the solar panel is damaged under the combined action of the two factors, most dust particles fly into surrounding gaseous media due to the fact that the gravitational acceleration of Mars is only one third of the earth, one part of dust particles are carried by the sound waves and are far away from the vertical space of the solar panel along with the sound waves, and the attachment relation between a small part of large-particle-size particles and the solar panel is damaged under the action of the sound waves, but the dust particles still stay on the solar panel due to the double influence of the gravity action and the sound waves which are difficult to carry. At the moment, the posture of the solar sailboard is changed to be perpendicular to the surface of the mars by matching with the posture change of the solar sailboard, the posture 2 is called, dust still stays on the solar sailboard and falls off under the action of gravity, and the dust removal effect is achieved.

The second dust removal mode takes the acoustic agglomeration effect as the action principle. The acoustic agglomeration effect acts on both stages. Firstly, in an attitude 1, a solar panel is parallel to the surface attitude of mars, when dust is removed under the action of surface acoustic waves, a part of particles do not leave the solar panel and enter air under the excitation and entrainment action of sound waves, but vibrate under the excitation vibration of the sound waves and the solar panel, the particles are not attached to the solar panel but are in a separated state, at the moment, large particles serve as collecting cores, the sound wave agglomeration effect is generated in a small range, dispersed mars dust particles are gradually agglomerated into larger particles, then the solar panel enters an attitude 2, and dust groups are more easily precipitated and separated from the solar panel under the action of gravity. Secondly, after the solar array panel enters the posture 2, a lot of spark dust floats around the solar array panel, one part of the spark dust comes from original environmental dust, and the other part of the spark dust comes from dust which is separated from the solar array panel under the action of surface acoustic waves and enters the air. The piezoelectric electroacoustic transducer generates low-frequency sound waves, and the frequency range of the low-frequency sound waves is 1kHz-10 kHz.

Under the action of sound waves, dust particles suspended in the air generate an agglomeration effect, the particles continuously collide to form large particle groups under the action of van der Waals force, and finally settle, so that the dust in the air is eliminated.

The specific technical scheme is as follows:

the application provides a method for removing dust of a solar array panel of a Mars detector, which is characterized by comprising the following steps of: the method comprises the following steps:

1) the method comprises the following steps that a detection device is arranged on a Mars detector, a dust removal device is installed on a solar sailboard of the Mars detector, a dust removal control device is installed inside a Mars detector main body and used for controlling the dust removal device to remove dust from the solar sailboard, and the solar sailboard is connected with the Mars detector main body through a connecting device;

2) the photosensitive sensor in the detection device detects the light energy receiving quantity of the solar sailboard in unit area in real time and transmits the light energy receiving quantity to the core processor of the dust removal control device, the core processor calculates the dust falling quantity of the solar sailboard and the working efficiency of the solar sailboard, and the working efficiency of the solar sailboard is as follows:

wherein S1 is the total light receiving area of the solar sailboard, S2 is the dust falling area of the solar sailboard, and S3 is the residual light receiving area of the solar sailboard;

3) if the working efficiency of the solar sailboard is lower than 50%, the dust removal control device controls the dust removal device to start working, the solar sailboard is in a horizontal state at the moment, a piezoelectric acoustic transducer in the dust removal device generates high-frequency sound waves to act on the solar sailboard, the sound waves directly act on the Mars dust particles on the solar sailboard by taking the surface acoustic wave effect as an action principle, and meanwhile, the wing panel of the solar sailboard is excited to generate micro-vibration to excite the falling dust vibration and flying to separate from the wing surface of the solar sailboard;

4) the solar sailboard is in a vertical state by rotating the rotating shaft of the solar sailboard, and the dust wing separation is promoted under the action of the gravity of the mars by taking the sound wave agglomeration effect as an action principle; meanwhile, a wind speed sensor in the detection device is started, when the wind speed near the Mars detector is lower than 5m/s, the direction of a piezoelectric-electroacoustic transducer is adjusted to control the direction of a rotating shaft, so that the piezoelectric-electroacoustic transducer is perpendicular to the wing surface of the solar array, the working state of the piezoelectric-electroacoustic transducer is adjusted, low-frequency sound waves are generated by the piezoelectric-electroacoustic transducer and act on dust suspended in the air near the solar array, a strong sound field enables Mars dust aerosol fine particles in the ambient air where the solar array is located to move relatively to improve the collision probability among the particles, the particles can be condensed into particles with larger sizes under the action of Van der Waals force and electrostatic force after collision, high-frequency collision is carried out in a short time, the particle size is increased continuously, and finally, the particles are dispersed through gravity settling;

5) through the action of the acoustic surface waves and the acoustic wave agglomeration, the solar sailboard of the Mars detector completes dust removal work.

Furthermore, the dust removal device is a piezoelectric-electric transducer which is used for generating sound waves, and piezoelectric-electric transducers are arranged on two sides of the solar sailboard.

Furthermore, the detection device comprises a photosensitive sensor and a wind speed sensor, the photosensitive sensor is used for measuring the light receiving performance of the solar sailboard and judging the dust falling degree of the airfoil of the solar sailboard, the wind speed sensor is installed on the outer surface of the main body of the Mars detector, and the photosensitive sensor is installed on the lower side of the solar sailboard.

Furthermore, the connecting device is a solar array rotating shaft, and the direction of the solar array is adjusted through the solar array rotating shaft.

Furthermore, the dust removal control device comprises a control module and a core processor, wherein the control module and the core processor are both installed inside the mars detector main body, and the core processor is used for receiving wind speed information, sound wave action time and rotation time of the solar sailboard.

Furthermore, 3-4 piezoelectric acoustic transducers are respectively arranged on two sides of each solar panel, directional horns are arranged on the acoustic transducers, a direction control rotating shaft is arranged at the joint of the lower part of the acoustic transducers and the solar panels, and the angle of the direction control rotating shaft is changed under the action of the control module.

Furthermore, the Mars detector also comprises a maneuvering system, the lower side of the Mars detector main body is connected with the maneuvering system, and the maneuvering system can realize that the Mars detector is fixed on the ground or moves forwards in a maneuvering mode.

Compared with the prior art, the beneficial effect of this application lies in:

1. the conversion efficiency of the solar sailboard is directly related to the service life of the Mars detector, and Mars dust blown by Mars continuously accumulates on the surface of the solar sailboard to reduce the conversion efficiency.

2. By means of the atmospheric environment on the Mars, which is easy for sound wave propagation, compared with natural wind dust removal, vibration dust removal and electrostatic dust removal, the Mars detector solar sailboard dust removal method has the characteristics of more thorough dust removal, stronger durability and simplicity and convenience in operation.

3. The application provides two sound wave dust removal methods, and the different effects of sound waves are utilized to eliminate the spark dust in different states, so that the applicability is strong.

4. The sound wave dust removal method acts on different Mars dust particle sizes through changing the frequency of the sound wave, so that the dust removal particle sizes are all covered. In addition, the sound wave action and the attitude control of the solar sailboard are combined, and the dust removal effect is better than that of other dust removal methods or a single dust removal method.

5. The dust removal system used by the dust removal method for the solar sailboard of the Mars probe can be manufactured into an assembly part, the solar wing base structure does not need to be changed or the solar sailboard does not need to be decomposed into single units, and the dust removal system is convenient to install and assemble.

Drawings

Fig. 1 is a schematic overall structure diagram of a dust removal system of a method for removing dust from a solar array panel of a mars probe according to the present application;

FIG. 2 is a schematic diagram of the internal structure of the Mars probe of the present application;

FIG. 3 is a schematic diagram of a horizontal attitude side view structure of a solar array panel of the Mars probe of the present application;

FIG. 4 is a schematic diagram of a vertical attitude side view structure of a Mars probe solar array panel of the present application;

fig. 5 is a control structure diagram of a method for removing dust from a solar array panel of a mars probe according to the present application.

Reference numerals:

1. the device comprises a solar panel, 2, a photosensitive sensor, 3, a piezoelectric-electroacoustic transducer, 3.1, a horn, 3.2, a direction control rotating shaft, 4, a solar panel rotating shaft, 5, a wind speed sensor, 6, a control module, 7, a core processor, 8 and a maneuvering system.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described with reference to fig. 1-5.

As can be seen from fig. 1-5 of the specification, a method for removing dust from a solar array panel of a mars probe comprises the following steps:

1) the method comprises the following steps that a detection device is arranged on a Mars detector, a dust removal device is installed on a solar sailboard of the Mars detector, a dust removal control device is installed inside a Mars detector main body and used for controlling the dust removal device to remove dust from the solar sailboard, and the solar sailboard is connected with the Mars detector main body through a connecting device;

2) the photosensitive sensor in the detection device detects the light energy receiving quantity of the solar sailboard in unit area in real time and transmits the light energy receiving quantity to the core processor of the dust removal control device, the core processor calculates the dust falling quantity of the solar sailboard and the working efficiency of the solar sailboard, and the working efficiency of the solar sailboard is as follows:

wherein S1 is the total light receiving area of the solar sailboard, S2 is the dust falling area of the solar sailboard, and S3 is the residual light receiving area of the solar sailboard;

3) if the working efficiency of the solar sailboard is lower than 50%, the dust removal control device controls the dust removal device to start working, the solar sailboard is in a horizontal state at the moment, a piezoelectric acoustic transducer in the dust removal device generates high-frequency sound waves to act on the solar sailboard, the sound waves directly act on the Mars dust particles on the solar sailboard by taking the surface acoustic wave effect as an action principle, and meanwhile, the wing panel of the solar sailboard is excited to generate micro-vibration to excite the falling dust vibration and flying to separate from the wing surface of the solar sailboard; the action time of the surface acoustic wave effect (the solar sailboard 1 is in a horizontal state) is 40-120 seconds;

4) the solar sailboard rotating shaft is rotated to enable the solar sailboard to be in a vertical state, and dust wing separation is promoted under the action of the gravity of a spark; meanwhile, the floating dust around the solar sailboard is removed by taking the acoustic agglomeration effect as the action principle, the wind speed sensor in the detection device is started, when the wind speed near the Mars detector is lower than 5m/s, the direction of the piezoelectric electroacoustic transducer is adjusted to control the direction of the rotating shaft, the piezoelectric-electric transducer is perpendicular to the airfoil surface of the solar array, the working state of the piezoelectric-electric transducer is adjusted to generate low-frequency sound waves, the low-frequency sound waves act on dust suspended in the air near the solar array, the strong sound field enables fine particles of Mars dust aerosol in the ambient air where the solar array is located to move relatively to improve the collision probability among the particles, and the particles can be condensed into particles with larger size under the action of Van der Waals force and electrostatic force after the particles collide, performing high-frequency collision in a short time, continuously increasing the particle size, finally completing dissipation through gravity settlement, and rotating the rotating shaft of the solar sailboard to enable the solar sailboard to recover the horizontal working state; the action time of the acoustic agglomeration effect (the solar sailboard 1 is in a vertical state) is 60-120 seconds.

5) Through the action of the acoustic surface waves and the acoustic wave agglomeration, the solar sailboard of the Mars detector completes dust removal work.

Furthermore, the dust removing device is a piezoelectric-electric transducer 3, the piezoelectric-electric transducer 3 is used for generating sound waves, and the piezoelectric-electric transducers 3 are arranged on two sides of the solar sailboard 1.

Further, the detection device comprises a photosensitive sensor 2 and a wind speed sensor 5, the photosensitive sensor 2 is used for measuring the light receiving performance of the solar sailboard 1 and judging the dust falling degree of the airfoil of the solar sailboard, the wind speed sensor 5 is installed on the outer surface of the main body of the Mars detector, and the photosensitive sensor is installed on the lower side of the solar sailboard 1.

Furthermore, the connecting device is a solar array rotating shaft 4, and the solar array is subjected to direction adjustment through the solar array rotating shaft 4.

Further, the dust removal control device comprises a control module 6 and a core processor 7, the control module 6 and the core processor 7 are both installed inside the mars detector main body, and the core processor 7 is used for receiving wind speed information, sound wave action time and rotation time of the solar sailboard.

Furthermore, 3-4 piezoelectric acoustic transducers are respectively arranged on two sides of each solar panel 1, a directional horn 3.1 is arranged on each acoustic transducer 3, the directional performance of acoustic waves is improved, the acoustic energy propagation efficiency is improved, and a direction control rotating shaft 3.2 is arranged at the joint of the lower part of each acoustic transducer and the solar panel, so that the acoustic transducers can complete posture conversion parallel to the solar panels and vertical to the solar panels. The direction control rotating shaft 3.2 is turned into an angle under the action of the control module 6. The number of the transducers can be increased or decreased according to the size of the solar sailboard, and the corresponding dust removal speed and dust removal efficiency can be improved along with the increase of the number of the transducers, but the cost can also be increased.

Further, the Mars detector also comprises a maneuvering system 8, the maneuvering system 8 is connected to the lower side of the Mars detector main body, and the maneuvering system 8 can realize that the Mars detector is fixed on the ground or moves forwards in a maneuvering mode. In the application, the maneuvering system 8 plays a role in supporting and moving the whole Mars detector, and the used materials are titanium alloy, tungsten-molybdenum, low-carbon alloy steel and the like.

The working principle of the method for removing dust of the solar sailboard of the Mars probe is as follows:

first, with the solar panel in horizontal position, the piezoelectric electroacoustic transducer 3 generates high frequency sound waves, and for a unit volume of a sufficiently small homogeneous solid medium, the gradient of the pressure field causes an acceleration of the unit volume elements and their displacement from the equilibrium position with a velocity v, the total displacement of the unit volume elements compressing the adjacent volume elements and thus causing a vibration propagation. The discontinuity of the medium forms an interface and the surface layer of the solid in air forms an interface between two different propagation environments, respectively a solid and a gas environment, so that the surface can be considered as a bonding layer in which the density and young's modulus parameters are discontinuous. At the discontinuous part of the structure, due to the change of a unit volume pressure field near the surface, surface acoustic waves appear in a volume surface element expansion mode, which causes the surface element to vibrate, the generated surface acoustic waves exert inertia force on dust particles which are static on the surface, and the stable relation between the spark dust and the solar sailboard under the action of the surface acoustic waves and the action of van der Waals force is destroyed, so that the surface acoustic waves are separated from the solar sailboard; then, the solar array panel enters a vertical state, most of the fire star dust on the solar array panel enters the ambient air at the moment, a large amount of fire star dust is diffused in the ambient air, the fire star dust comprises dust in the original environment and dust just leaving the solar array panel, the piezoelectric electroacoustic transducer is controlled to generate low-frequency sound waves, the low-frequency sound waves act on the ambient air, the strong sound field enables fine particles of fire star dust aerosol in the ambient air to move relatively to improve the collision probability among the particles, the particles can be condensed into particles with larger sizes under the action of Van der Waals force and electrostatic force after collision, high-frequency collision is carried out in a short time, the particle size is continuously increased, and finally, the particles are dispersed through gravity settling. Under the action of the acoustic surface waves and the acoustic wave agglomeration, the solar sailboard of the Mars detector completes dust removal work.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and it will be apparent to those skilled in the art that various modifications and variations can be made in the embodiment of the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.