Laser energy supply control method, device and laser energy supply system

Abstract

The present invention relates to the field of laser energy supply technology, and discloses a laser energy supply control method, device, and laser energy supply system. The method includes: determining the chord length of the laser spot when scanning the blade and the chord length when passing through the blade gap; recording the time when the laser spot enters and leaves each blade; when entering the current blade, calculating the first speed according to the time when entering and leaving each blade, and the chord length when scanning the previous blade; calculating the second speed according to the time when entering and leaving each blade, and the chord length when passing through the blade gap; calculating the acceleration according to the first speed, the second speed, and the time when entering and leaving each blade; calculating the start time according to the time when entering and leaving each blade, the first speed, the second speed, the acceleration, and the invalid scanning distance; calculating the shutdown time according to the time when entering the current blade, the first speed, the second speed, the acceleration, the invalid scanning distance, and the scanning distance. The present invention can accurately control the start and stop of the laser.

Description

Technical Field

[0001] The present invention relates to the field of laser energy supply technology, and in particular to a laser energy supply control method and device, and a laser energy supply system. Background Art

[0002] Wind power, a key component in building new power systems, has experienced rapid growth in recent years. Blades, the wind-catching components of wind turbines, are core and valuable components. Wind turbine blades are large and rotate at high speeds, creating harsh operating environments. However, condition monitoring of wind turbine blade exterior surfaces has not been widely adopted, with power supply constraints being a major bottleneck limiting its development.

[0003] Currently, some products are installed on the outer surface of blades to monitor blade condition, powered by wired power or a combination of solar energy and batteries. Due to the high-speed rotation of wind turbine blades, the high friction with the air, and the large size of the blades, wired power supply has a significant impact on the blades and is difficult to implement. Since it is impossible to arrange large areas of solar cells and batteries on the blade surface, the solar power supply has low power, poor stability, and reliability, making it difficult to meet the power supply needs of monitoring sensors. Lasers have the advantages of high energy density, long transmission distance, and good directionality. With the development of laser technology, laser power supply will be a promising wireless power supply method.

[0004] Based on the characteristics of laser power supply, it can be used for wireless power supply of sensors on the outer surface of wind turbine blades. However, high-energy lasers may burn the blades. Therefore, when using laser power supply, the laser must be accurately started and stopped to ensure that the laser can be accurately aimed. However, the wind turbine blades are rotating at high speed, and therefore, precise aiming and start-stop control of laser power supply are difficult. Summary of the Invention

[0005] In view of this, embodiments of the present invention provide a laser power supply control method, device, and laser power supply system to solve the problem of difficulty in accurately starting and stopping the laser when using laser power supply.

[0006] In a first aspect, an embodiment of the present invention provides a laser energy supply control method, the method comprising:

[0007] Determine the chord length when the laser spot scans the blade, and the chord length when the laser spot passes through the gap between two adjacent blades; record the moment when the laser spot enters and leaves each blade each time; when the laser spot enters the current blade, calculate the first speed of the laser spot leaving the previous blade based on the moment when the laser spot enters and leaves the previous blade, and the chord length when the laser spot scans through the previous blade, and the previous blade and the current blade are adjacent in the scanning order of the laser spot on each blade; calculate the laser spot based on the moment when the laser spot leaves the previous blade, the moment when the laser spot enters the current blade, and the chord length when the laser spot passes through the gap between the previous blade and the current blade. Scan the second speed of the current blade; calculate the acceleration of the laser spot scanning the blade according to the first speed, the second speed, the moment when the laser spot leaves the previous blade, and the moment when the laser spot enters the current blade; calculate the turning-on time of the laser according to the moment when the laser spot enters the current blade, the first speed, the second speed, the acceleration, and the invalid scanning distance between the photovoltaic cell and the spot entry point of the current blade; calculate the turning-off time of the laser according to the moment when the laser spot enters the current blade, the first speed, the second speed, the acceleration, the invalid scanning distance between the photovoltaic cell and the spot entry point of the current blade, and the scanning distance of the laser spot on the photovoltaic cell.

[0008] The method provided by an embodiment of the present invention first calculates the first speed of the laser spot when scanning the previous blade and the second speed when entering the current blade, then calculates the acceleration of the laser spot scanning the blade based on the first speed and the second speed, and then calculates the turn-on and turn-off times of the laser based on the time of the current blade, the first speed, the second speed, the acceleration, the invalid scanning distance and the scanning distance of the laser spot on the photovoltaic cell. The speed and acceleration of the laser spot can accurately determine the time when the laser spot enters the photovoltaic cell and the time when it leaves the photovoltaic cell. The turn-on and turn-off times of the laser are determined based on the time when the laser spot enters the photovoltaic cell and the time when it leaves the photovoltaic cell, so that the laser spot can accurately fall into the photovoltaic cell and reduce the damage of the laser to the wind turbine.

[0009] In one embodiment, the laser start-up time is calculated based on the moment when the laser spot enters the current blade, the first speed, the second speed, the acceleration, and the invalid scanning distance between the photovoltaic cell and the spot entry point of the current blade, including: if the acceleration is 0, the first invalid scanning time of the laser spot on the current blade is calculated based on the first speed and the invalid scanning distance; based on the moment when the laser spot enters the current blade, the first invalid scanning time is extended to obtain the first initial start-up time of the laser; based on the first initial start-up time, the preset safety time is extended to obtain the laser start-up time.

[0010] In one embodiment, the laser shut-off moment is calculated based on the moment when the laser spot enters the current blade, the first speed, the second speed, the acceleration, the invalid scanning distance between the photovoltaic cell and the spot entry point of the current blade, and the scanning distance of the laser spot on the photovoltaic cell, including: if the acceleration is 0, the time it takes for the laser spot to sweep out the photovoltaic cell in the current blade is calculated based on the sum of the invalid scanning distance and the scanning distance, and the first speed; based on the moment when the laser spot enters the current blade, the time it takes to sweep out the photovoltaic cell is extended to obtain the first initial shut-off moment of the laser; based on the first initial shut-off moment, the preset safety time is shortened to obtain the laser shut-off moment.

[0011] In one embodiment, the laser start-up time is calculated based on the moment when the laser spot enters the current blade, the first speed, the second speed, the acceleration, and the invalid scanning distance between the photovoltaic cell and the spot entry point of the current blade, including: if the acceleration is not 0, the second invalid scanning time of the laser spot on the current blade is calculated based on the second speed, the invalid scanning distance and the acceleration; based on the moment when the laser spot enters the current blade, the second invalid scanning time is extended to obtain the second initial start-up time of the laser; based on the second initial start-up time, the preset safety time is extended to obtain the laser start-up time.

[0012] In one embodiment, the laser shut-off moment is calculated based on the moment when the laser spot enters the current blade, the first speed, the second speed, the acceleration, the invalid scanning distance between the photovoltaic cell and the spot entry point of the current blade, and the scanning distance of the laser spot on the photovoltaic cell, including: if the acceleration is not 0, calculating the time it takes for the laser spot to sweep out the photovoltaic cell in the current blade based on the sum of the invalid scanning distance and the scanning distance, the acceleration, and the second speed; based on the moment when the laser spot enters the current blade, extending the time it takes to sweep out the photovoltaic cell to obtain a second initial shut-off moment of the laser; based on the second initial shut-off moment, shortening the preset safety time to obtain the laser shut-off moment.

[0013] In one embodiment, the method provided by an embodiment of the present invention also includes: obtaining the power consumption required by the photovoltaic cell in one day; calculating the single power supply duration of the laser spot to the photovoltaic cell based on the closing time and the opening time of the laser on the photovoltaic cell; calculating the power supply of the laser to the photovoltaic cell based on the single power supply duration, the rated speed of the wind turbine impeller, and the laser transmission power of the laser; if the power supply energy is less than the power consumption, adjusting the laser transmission power and / or the scanning distance so that the power supply energy is greater than or equal to the power consumption.

[0014] In the second aspect, an embodiment of the present invention provides a laser power supply system, including: a laser, a laser aiming and emitting module, and a control module, wherein the laser is used to emit laser to the laser aiming and emitting module; the laser aiming and emitting module is used to send laser to the blade, receive laser feedback signals, and send the laser feedback signals to the control module; the control module is used to receive laser feedback signals and execute the laser power supply control method of the above-mentioned first aspect or any corresponding embodiment thereof.

[0015] In a third aspect, an embodiment of the present invention provides a laser energy supply control device, which includes: a chord length acquisition module for determining the chord length when the laser spot scans the blade, and the chord length when the laser spot passes through the gap between two adjacent blades; a time recording module for recording the moment when the laser spot enters and leaves each blade each time; a first speed calculation module, when the laser spot enters the current blade, the first speed calculation module is used to calculate the first speed of the laser spot leaving the previous blade according to the moment when the laser spot enters and leaves the previous blade, and the chord length when the laser spot scans through the previous blade, the previous blade and the current blade are adjacent in the scanning order of the laser spot on each blade; a second speed calculation module is used to calculate the first speed of the laser spot leaving the previous blade according to the moment when the laser spot leaves the previous blade, the moment when the laser spot enters the current blade, and the moment when the laser spot passes The chord length of the gap between the previous blade and the current blade is used to calculate the second speed of the laser spot scanning the current blade; the acceleration calculation module is used to calculate the acceleration of the laser spot scanning the blade according to the first speed, the second speed, the moment when the laser spot leaves the previous blade, and the moment when the laser spot enters the current blade; the start-up time calculation module is used to calculate the start-up time of the laser according to the moment when the laser spot enters the current blade, the first speed, the second speed, the acceleration, and the invalid scanning distance between the photovoltaic cell and the spot entry point of the current blade; the closing time calculation module is used to calculate the closing time of the laser according to the moment when the laser spot enters the current blade, the first speed, the second speed, the acceleration, the invalid scanning distance between the photovoltaic cell and the spot entry point of the current blade, and the scanning distance of the laser spot on the photovoltaic cell.

[0016] In a fourth aspect, an embodiment of the present invention provides a computer device comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, computer instructions being stored in the memory, and the processor executing the laser power supply control method of the first aspect or any corresponding embodiment thereof by executing the computer instructions.

[0017] In a sixth aspect, an embodiment of the present invention provides a computer-readable storage medium having computer instructions stored thereon, the computer instructions being used to enable a computer to execute the laser power supply control method of the first aspect or any corresponding embodiment thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 is a schematic diagram of a laser power supply system according to some embodiments of the present invention;

[0020] Figure 2 is a schematic diagram of a blade being scanned by a laser spot according to some embodiments of the present invention;

[0021] Figure 3 is a flow chart of a laser energy supply control method according to some embodiments of the present invention;

[0022] Figure 4 is a structural block diagram of a laser energy supply control device according to an embodiment of the present invention;

[0023] Figure 5 Schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0024] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0025] Wind power, a key component in building new power systems, has experienced rapid growth in recent years. Blades, the wind-catching components of wind turbines, are core and valuable components. Monitoring wind turbine blades provides timely insight into turbine operating status and increases blade lifespan. To monitor blades, monitoring devices can be installed on the outer surface of the blades to capture information about the blades. This information can then be used to monitor blade operating conditions.

[0026] During the operation of the monitoring device, powering it is a problem that must be solved. Since the wind turbine blades are rotating at high speed, they cannot be powered by wires. If solar power is used, the wind turbine blades cannot be covered with a large number of solar panels. The energy collected by a small number of solar panels is small, which is difficult to meet the power demand of the monitoring device. Laser has the characteristics of high energy density, long transmission distance, and good directionality, which can realize the power supply of the monitoring device. Therefore, an embodiment of the present invention provides a laser power supply system, such as Figure 1 As shown, the system includes a laser 1, a laser aiming and emitting module 3, and a control module 4.

[0027] The laser 1 is used to emit laser light to the laser aiming and emitting module 3 .

[0028] The laser aiming and emitting module 3 is used to emit laser to the blade, receive laser feedback signals, and send the laser feedback signals to the control module 4 .

[0029] In an optional embodiment, the laser aiming and emitting module 3 adjusts the size and direction of the laser spot when emitting laser light toward the blade. After transmitting the laser light toward the blade, the laser aiming and emitting module 3 receives a laser feedback signal. This feedback signal can be used to determine whether the laser light has entered the blade and accurately measure the distance to the blade.

[0030] The laser aiming and transmitting module 3 has a precise ranging function. The ranging can be achieved by laser, radar wave or ultrasonic wave. The center of the ranging module needs to be coaxial with the laser emission center. If they are not coaxial, correction is required.

[0031] The control module 4 is used to receive the laser feedback signal and calculate the laser on and off times.

[0032] Since the laser energy is large, if the wind turbine blades are irradiated by the laser for a long time, the blades may be burned. Therefore, it is necessary to accurately control the opening and closing of the laser 1 to ensure that the laser can accurately enter the blade light energy receiving module.

[0033] In an optional embodiment, the laser, the laser aiming and emitting module 3 and the control module 4 are connected via an optical fiber 2 .

[0034] In an optional embodiment, the blades of the wind turbine are equipped with a blade light energy receiving module, which includes a photovoltaic cell 5, a DC-DC converter module 6, and a battery 7. The photovoltaic cell 5 is used to receive laser light energy and convert it into electrical energy; the DC-DC converter module 6 is used to convert the current generated by the photovoltaic cell 5 into a stable voltage to charge the battery 7; the battery 7 is used to store and supply electrical energy.

[0035] The blade light energy receiving module is adhered to the outer surface of the blade. In order for the wind turbine to realize the transmission of laser energy under normal operation, it must be ensured that the blade light energy receiving module can receive the laser emitted by the cabin light energy transmitting module within a certain blade pitch angle range.

[0036] The blade monitoring module 8 is an energy-consuming module adhered to the outer surface of the blade and is used to collect and transmit the monitoring data required by the customer.

[0037] like Figure 2 The figure shows a schematic diagram of a laser spot scanning a blade, L1 is the chord length of the laser spot when scanning the blade, t0 is the moment when the laser spot enters the blade, t1 is the moment when the laser spot enters the photovoltaic cell, t2 is the moment when the laser spot leaves the photovoltaic cell, t3 is the moment when the laser spot leaves the blade, l is the scanning distance of the laser spot in the photovoltaic panel, and the scanning distance can be determined based on the scanning route of the laser spot in the photovoltaic cell. Figure 2 The scanning distance is determined by the length of the photovoltaic cell, which does not limit the technical solution of this invention. Δl is the scanning distance between the laser spot entering the blade and the photovoltaic cell. To ensure energy transmission efficiency and blade safety during high-speed rotation of wind turbine blades, precise control of the laser's start and stop times is required. Specifically, t1 and t2 must be calculated.

[0038] According to an embodiment of the present invention, an embodiment of a laser power supply control method is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0039] In this embodiment, a laser energy supply control method is provided, which can be used in the control module 4 in the above-mentioned laser energy supply system. Figure 3 FIG. 1 is a flow chart of a laser energy supply control method according to an embodiment of the present invention. Figure 3 As shown, the process includes the following steps:

[0040] Step S101 : determining the chord length when the laser spot scans the blade, and the chord length when the laser spot passes through the gap between two adjacent blades.

[0041] In an optional embodiment, when the laser is emitted into the wind turbine blade at different angles, the chord length of the laser spot when scanning different blades may be the same or different. Similarly, the chord length of the laser spot when passing through different gaps may be the same or different.

[0042] In an optional embodiment, when the laser spot scans the blade, there is a corresponding spot entry point and a spot exit point on the blade. The spot entry point refers to the point on the blade corresponding to when the laser spot first enters the blade during the current scanning process. The spot entry point is located at the leading edge of the blade. The spot exit point refers to the point on the blade corresponding to when the laser spot leaves the blade during the current scanning process. The spot exit point is located at the trailing edge of the blade.

[0043] The chord length when the laser spot scans the blade refers to the straight-line distance or curved-line distance connecting the front and rear edges of the blade. The straight-line distance and curved-line distance are calculated with the entry point and the exit point of the laser spot as endpoints.

[0044] The chord length of the laser spot when passing through the gap between two adjacent blades is calculated with the laser spot exit point in the previous blade and the laser spot entry point in the next blade as endpoints.

[0045] In an optional embodiment, since the position of the wind turbine generator set will not change substantially, if the laser emission angle is not adjusted, the chord length of the laser spot when scanning the blades and the chord length of the laser spot when passing through the gap between two adjacent blades can be calibrated once every preset time period. The preset time period can be one month, six months, etc. However, if the laser emission angle needs to be adjusted, the laser spot's entry point and exit point on the blade will change after the adjustment of the laser emission angle. In this case, the chord length of the laser spot scanning the blades and the chord length of the laser spot between the two blades will also change. Therefore, each time the laser emission angle is adjusted, the chord length of the laser spot when scanning the blades and the chord length of the laser spot when passing through the gap between two adjacent blades need to be updated.

[0046] Step S102 , recording the moment when the laser spot enters and leaves each blade.

[0047] In an optional embodiment, after the laser aiming and transmitting module sends a signal, it will receive a reflected signal, and it can be judged based on the reflected signal whether the laser spot enters or leaves the blade after the laser is emitted.

[0048] In an optional embodiment, the laser aiming and transmitting module can continuously emit a detection signal, with the detection signal being emitted at the same position and angle as when the power laser was emitted. After the laser aiming and transmitting module emits the detection signal, it can determine whether the detection signal has entered or left the blade based on the reflected signal of the detection signal. If the detection signal is determined to have entered the blade, it indicates that after the power laser is emitted, the laser spot of the power laser will also enter the blade. If the detection signal is determined to have left the blade, it indicates that after the power laser is emitted, the laser spot of the power laser will also leave the blade. The detection signal can be any one of a laser used for ranging, a radar wave, or an ultrasonic wave. The energy of the laser used for ranging is less than the energy used to power the photovoltaic cell and will not cause damage to the blade.

[0049] For example, if the intensity of the reflected signal is greater than a first preset value within a preset time period, and the fluctuation range of the intensity is less than a second preset value, then it is determined that the laser spot has entered the blade; or if the signal characteristics of the reflected signal match the preset signal characteristics, then it is determined that the laser spot has entered the blade. Conversely, if no feedback signal is received, or the intensity of the reflected signal is less than the first preset value, or the fluctuation range of the intensity of the reflected signal is greater than the second preset value, or if the signal characteristics of the reflected signal do not match the preset signal characteristics, then it is determined that the laser spot has not entered the blade.

[0050] Based on the above method, by real-time monitoring of the reflected signal, the moment when the laser spot enters the blade and the moment when it leaves the blade can be determined.

[0051] Since the rotation speed of the blades changes with the wind speed during the operation of the wind turbine, it is impossible to ensure that the blades are moving at a uniform speed. Therefore, every time the laser spot enters and leaves the blade, the moment is recorded, so that the opening and closing of the laser can be accurately controlled.

[0052] Step S103, when the laser spot enters the current blade, the first speed of the laser spot leaving the previous blade is calculated based on the moment when the laser spot enters and leaves the previous blade, and the chord length when the laser spot scans through the previous blade. The previous blade and the current blade are adjacent in the order of the laser spot scanning each blade, that is, after leaving the previous blade, the laser spot immediately enters the current blade and no longer scans other blades in the middle.

[0053] Step S104 , calculating a second speed of the laser spot scanning the current blade according to the moment when the laser spot leaves the previous blade and the moment when the laser spot enters the current blade.

[0054] In an optional embodiment, the first speed and the second speed are calculated by the following formula:

[0055]

[0056] Among them, t 00 is the time when the laser spot enters the previous leaf, t 30 is the time when the laser spot leaves the previous leaf, L1 is the chord length when the laser spot scans the previous leaf, t0 is the moment when the laser spot enters the current leaf, and L2 is the chord length when the laser spot passes through the gap between the previous leaf and the current leaf.

[0057] Step S105 , calculating the acceleration of the laser spot scanning the blade according to the first speed, the second speed, the moment when the laser spot leaves the previous blade, and the moment when the laser spot enters the current blade.

[0058] In an optional embodiment, the acceleration of the blade scanned by the laser spot is calculated by the following formula:

[0059]

[0060] Step S106 , calculating the laser start-up time according to the time when the laser spot enters the current blade, the first speed, the second speed, the acceleration, and the invalid scanning distance between the photovoltaic cell and the spot entry point of the current blade.

[0061] Photovoltaic cells are set on the surface of the blades. They can only be powered when the laser spot enters the photovoltaic cells. Therefore, the distance traveled before the laser spot enters the photovoltaic cells is an invalid scanning distance. After the invalid scanning distance, turning on the laser can realize the power supply to the photovoltaic cells.

[0062] Step S107, calculating the laser shut-off time according to the time when the laser spot enters the current blade, the first speed, the second speed, the acceleration, the invalid scanning distance between the photovoltaic cell and the spot entry point of the current blade, and the scanning distance of the laser spot on the photovoltaic cell.

[0063] In an optional embodiment, the scanning distance of the laser spot on the photovoltaic cell refers to the length of the scanning path of the laser spot on the photovoltaic cell.

[0064] When the laser spot leaves the photovoltaic cell, the laser cannot supply energy to the photovoltaic cell. If the laser is kept on, it will cause damage to the blades. Therefore, when the laser spot passes the scanning distance, the laser needs to be turned off.

[0065] The method provided by an embodiment of the present invention first calculates the first speed of the laser spot when scanning the previous blade and the second speed when entering the current blade, then calculates the acceleration of the laser spot scanning the blade based on the first speed and the second speed, and then calculates the turn-on and turn-off times of the laser based on the time of the current blade, the first speed, the second speed, the acceleration, the invalid scanning distance and the scanning distance of the laser spot on the photovoltaic cell. The speed and acceleration of the laser spot can accurately determine the time when the laser spot enters the photovoltaic cell and the time when it leaves the photovoltaic cell. The turn-on and turn-off times of the laser are determined based on the time when the laser spot enters the photovoltaic cell and the time when it leaves the photovoltaic cell, so that the laser spot can accurately fall into the photovoltaic cell and reduce the damage of the laser to the wind turbine.

[0066] In an optional embodiment, in the above step S106, if the acceleration is 0, the step of calculating the laser start time includes:

[0067] Step a1: calculating a first invalid scanning duration of the laser spot on the current blade according to the first speed and the invalid scanning distance.

[0068] In an optional embodiment, the first ineffective scanning time length of the laser spot on the current blade is determined according to the product of the first speed and the ineffective scanning distance.

[0069] Step a2: Based on the moment when the laser spot enters the current blade, the first invalid scanning time is extended to obtain the first initial start-up moment of the laser.

[0070] Step a3: Based on the first initial start-up time, the preset safety time is extended to obtain the start-up time of the laser.

[0071] In a specific embodiment, when a=0, the laser start time t1 is:

[0072]

[0073] Among them, t 00 is the time when the laser spot enters the previous leaf, t 30 is the time when the laser spot leaves the previous leaf, L1 is the chord length when the laser spot scans the previous leaf, t0 is the moment when the laser spot enters the current leaf, Δt is the preset safety time, and Δl is the invalid scanning distance.

[0074] Since there may be a certain deviation between the calculated scanning speed of the laser spot and the actual scanning speed, on the basis of the first initial start-up moment, extending the preset safety time to obtain the start-up moment can further ensure that after the laser is turned on, the laser spot falls on the photovoltaic cell, avoiding the laser spot falling on the blade and causing damage to the blade.

[0075] The preset safety time can be set in combination with parameters such as the scanning speed of the laser spot and the scanning distance of the laser spot on the photovoltaic cell. In the embodiment of the present invention, the value of the preset safety time is not specifically limited. For example, when the scanning speed of the laser spot is faster, a shorter preset safety time can be set; when the scanning speed of the laser spot is slower, a longer preset safety time can be set; when the scanning distance is longer, a longer preset safety time can be set; when the scanning distance is shorter, a shorter preset safety time can be set.

[0076] In an optional embodiment, in the above step S107, if the acceleration is 0, the step of calculating the laser shut-off time includes:

[0077] Step b1, calculating the time it takes for the laser spot to sweep out the photovoltaic cell in the current blade according to the sum of the invalid scanning distance and the scanning distance and the first speed.

[0078] In an optional embodiment, the duration for which the laser spot sweeps out the photovoltaic cell in the current blade is determined according to the product of the first speed and the sum of the invalid scanning distance and the scanning distance.

[0079] Step b2: based on the moment when the laser spot enters the current blade, the duration of sweeping out the photovoltaic cell is extended to obtain the first initial closing moment of the laser.

[0080] Step b3: shortening the preset safety time based on the first initial closing time to obtain the closing time of the laser.

[0081] In a specific embodiment, when a=0, the laser shut-off time is:

[0082]

[0083] Among them, t 00 is the time when the laser spot enters the previous leaf, t 30 is the time when the laser spot leaves the previous leaf, L1 is the chord length when the laser spot scans the previous leaf, t0 is the moment when the laser spot enters the current leaf, Δt is the preset safety time, Δl is the invalid scanning distance, and l is the scanning distance.

[0084] In an optional embodiment, in the above step S106, if the acceleration is not 0, the step of calculating the laser start time includes:

[0085] Step c1, calculating the second invalid scanning time of the laser spot on the current blade according to the second speed, the invalid scanning distance and the acceleration.

[0086] Step c2: based on the moment when the laser spot enters the current blade, extend the second invalid scanning time to obtain the second initial start time of the laser;

[0087] Step c3: Based on the second initial start-up time, the preset safety time is extended to obtain the start-up time of the laser.

[0088] In an optional embodiment, when a≠0, the laser start time is:

[0089]

[0090] Among them, t0 is the moment when the laser spot enters the current blade, a is the acceleration, v2 is the second speed, Δt is the preset safety time, and Δl is the invalid scanning distance.

[0091] In an optional embodiment, in the above step S106, if the acceleration is not 0, the step of calculating the laser shut-off time includes:

[0092] Step d1 , calculating the time it takes for the laser spot to sweep out the photovoltaic cell in the current blade according to the sum of the invalid scanning distance and the scanning distance, the acceleration, and the second speed.

[0093] Step d2: Based on the moment when the laser spot enters the current blade, the duration of sweeping out the photovoltaic cell is extended to obtain the second initial closing moment of the laser.

[0094] Step d3: shortening the preset safety time based on the second initial closing time to obtain the closing time of the laser.

[0095] In an optional embodiment, when a≠0, the laser shut-off time is:

[0096]

[0097] Among them, t0 is the moment when the laser spot enters the current blade, a is the acceleration, v2 is the second speed, Δt is the preset safety time, Δl is the invalid scanning distance, and l is the scanning distance.

[0098] In an optional embodiment, the method provided by the embodiment of the present invention further includes:

[0099] Step e1: Obtain the power consumption required by the photovoltaic cell in one day.

[0100] In an optional embodiment, the power consumption required to be provided by the photovoltaic cell in a day is determined based on the power consumption of the monitoring module in a day.

[0101] Step e2, calculating the single energy supply duration of the laser spot to the photovoltaic cell according to the closing time and opening time of the laser on the photovoltaic cell.

[0102] Step e3, calculating the power supplied by the laser to the photovoltaic cell based on the single energy supply duration, the rated speed of the wind turbine rotor, and the laser transmission power of the laser.

[0103] In an optional embodiment, when a=0, the power supplied by the laser to the photovoltaic cell for one day is:

[0104]

[0105] When a≠0, the power supplied by the laser to the photovoltaic cell for one day is:

[0106]

[0107] Among them, E1 represents the power supply of the laser to the photovoltaic cell for one day, t 00 is the time when the laser spot enters the previous leaf, t 30 is the time when the laser spot leaves the previous blade, L1 is the chord length when the laser spot scans the previous blade, Δt is the preset safety time, Δl is the invalid scanning distance, a is the acceleration, v2 is the second speed, Δl is the invalid scanning distance, l is the scanning distance, P is the effective receiving power of laser energy transmission, and n is the rated speed of the wind turbine rotor.

[0108] Step e4: If the supplied power is less than the consumed power, adjust the laser transmission power and / or the scanning distance so that the supplied power is greater than or equal to the consumed power.

[0109] Since the stronger the laser transmission power, the stronger the effective receiving power of the laser energy transmission, and the longer the scanning distance, the more energy the photovoltaic cell receives, the laser transmission power and / or the scanning distance can be adjusted so that the supplied power is greater than or equal to the consumed power.

[0110] When adjusting the scanning distance, the length of the photovoltaic cell can be adjusted, thereby increasing the scanning distance of the laser spot on the photovoltaic cell.

[0111] In an optional embodiment, to ensure safety, in any case, when it is detected that the laser is not irradiated on the blade, the laser emission must be stopped immediately and quickly. The specific judgment basis is:

[0112] Lmax min <H <L max ,

[0113] Where H is the distance from the laser emission point to the photovoltaic cell, L max 、L min The upper and lower limits of the safety distance are determined according to the on-site conditions. If the safety range is exceeded, it is considered that an abnormal situation has occurred and the laser emission needs to be stopped quickly.

[0114] In an embodiment of the present invention, when emitting laser light toward a photovoltaic cell, the reflected signal of the laser light is monitored in real time. If it is determined based on the reflected signal of the laser that the distance between the laser and the irradiated object is less than the lower limit of the safety distance, or if it is determined based on the reflected signal of the laser that the distance between the laser and the irradiated object is greater than the upper limit of the safety distance, then it is determined that the current irradiated object is not a photovoltaic cell. In this case, in order to ensure safety, it is necessary to immediately turn off the laser and stop emitting the laser light.

[0115] This embodiment also provides a laser power supply control device for implementing the above-mentioned embodiments and preferred embodiments. Details already described will not be repeated here. As used below, the term "module" may refer to a combination of software and / or hardware that implements a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation using hardware, or a combination of software and hardware, is also possible and contemplated.

[0116] This embodiment provides a laser energy supply control device, such as Figure 4 As shown, including:

[0117] The chord length acquisition module 401 is used to determine the chord length when the laser spot scans the blade, and the chord length when the laser spot passes through the gap between two adjacent blades;

[0118] A time recording module 402 is used to record the moment when the laser spot enters and leaves each blade;

[0119] A first velocity calculation module 403 is configured to calculate, when the laser spot enters the current blade, a first velocity calculation module based on the time when the laser spot enters and leaves the previous blade and the chord length of the laser spot when scanning the previous blade, a first velocity of the laser spot when leaving the previous blade, wherein the previous blade and the current blade are adjacent in the order in which the laser spot scans the blades;

[0120] A second speed calculation module 404 is configured to calculate a second speed of the laser spot scanning the current blade based on the time when the laser spot leaves the previous blade, the time when the laser spot enters the current blade, and the chord length when the laser spot passes through the gap between the previous blade and the current blade;

[0121] The acceleration calculation module 405 is used to calculate the acceleration of the laser spot scanning the blade based on the first speed, the second speed, the time when the laser spot leaves the previous blade, and the time when the laser spot enters the current blade;

[0122] The start-up time calculation module 406 is used to calculate the start-up time of the laser according to the time when the laser spot enters the current leaf, the first speed, the second speed, the acceleration, and the invalid scanning distance between the photovoltaic cell and the point where the laser spot enters the current leaf;

[0123] The closing time calculation module 407 is used to calculate the laser closing time based on the time when the laser spot enters the current blade, the first speed, the second speed, the acceleration, the invalid scanning distance between the photovoltaic cell and the spot entry point of the current blade, and the scanning distance of the laser spot on the photovoltaic cell.

[0124] The laser energy supply control device in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0125] The further functional description of each of the above modules is the same as that of the above corresponding embodiments and will not be repeated here.

[0126] The embodiment of the present invention also provides a computer device having the above Figure 5 The laser power supply control device shown.

[0127] See also Figure 5 , Figure 5 is a structural diagram of a computer device provided by an optional embodiment of the present invention, such as Figure 5 As shown, the computer device includes: one or more processors 10, memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Various components utilize different buses to communicate with each other and can be installed on a common mainboard or installed in other ways as needed. The processor can process the instructions executed in the computer device, including instructions stored in the memory or on the memory to display the graphical information of the GUI on an external input / output device (such as, a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Equally, multiple computer devices can be connected, and each device provides part of the necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 5 A processor 10 is taken as an example.

[0128] The processor 10 may be a central processing unit, a network processor, or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit, a programmable logic device, or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic, or any combination thereof.

[0129] The memory 20 stores instructions that can be executed by at least one processor 10, so as to enable at least one processor 10 to execute the method shown in the above embodiment.

[0130] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created based on the use of a computer device for displaying a small program landing page, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 20 may optionally include a memory remotely located relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof.

[0131] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid-state drive; the memory 20 may also include a combination of the above types of memory.

[0132] The input device 30 can receive input digital or character information and generate key signal input related to user settings and function control of the computer device, such as a touch screen, a keypad, a mouse, a trackpad, a touch pad, an indicator stick, one or more mouse buttons, a trackball, a joystick, etc. The output device 40 can include a display device, an auxiliary lighting device (e.g., an LED), and a tactile feedback device (e.g., a vibration motor). The above-mentioned display device includes but is not limited to a liquid crystal display, a light emitting diode, a display, and a plasma display. In some optional embodiments, the display device can be a touch screen.

[0133] The embodiment of the present invention also provides a computer-readable storage medium. The above-mentioned method according to the embodiment of the present invention can be implemented in hardware, firmware, or implemented as a computer code that can be recorded in a storage medium, or implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and downloaded through a network and will be stored in a local storage medium, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state drive, etc.; further, the storage medium can also include a combination of the above-mentioned types of memory. It can be understood that a computer, a processor, a microprocessor controller or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor or hardware, the method shown in the above embodiment is implemented.

[0134] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A laser energy supply control method, characterized in that: The method comprises: Determine the chord length when the laser spot scans the blade, and the chord length when the laser spot passes through the gap between two adjacent blades; Record the moment when the laser spot enters and leaves each leaf; When the laser spot enters the current blade, Calculating a first velocity of the laser spot leaving the previous leaf based on the time when the laser spot enters and leaves the previous leaf, and the chord length of the laser spot when scanning through the previous leaf, wherein the previous leaf and the current leaf are adjacent in the order in which the laser spot scans the leaves; Calculating a second speed at which the laser spot scans the current blade based on the moment when the laser spot leaves the previous blade, the moment when the laser spot enters the current blade, and the chord length when the laser spot passes through the gap between the previous blade and the current blade; Calculating the acceleration of the laser spot scanning the blade according to the first speed, the second speed, the moment when the laser spot leaves the previous blade, and the moment when the laser spot enters the current blade; Calculating the laser start-up time according to the time when the laser spot enters the current blade, the first speed, the second speed, the acceleration, and the invalid scanning distance between the photovoltaic cell and the point where the spot enters the current blade; The laser shut-off moment is calculated based on the moment when the laser spot enters the current blade, the first speed, the second speed, the acceleration, the invalid scanning distance between the photovoltaic cell and the spot entry point of the current blade, and the scanning distance of the laser spot on the photovoltaic cell.

2. The method according to claim 1, characterized in that The step of calculating the laser start-up time according to the time when the laser spot enters the current blade, the first speed, the second speed, the acceleration, and the invalid scanning distance between the photovoltaic cell and the light spot entry point of the current blade includes: If the acceleration is 0, Calculating a first invalid scanning duration of the laser spot on the current blade according to the first speed and the invalid scanning distance; Based on the moment when the laser spot enters the current blade, the first invalid scanning time is extended to obtain the first initial start-up moment of the laser; On the basis of the first initial start-up time, the preset safety time is extended to obtain the start-up time of the laser.

3. The method according to claim 1, characterized in that The step of calculating the laser shut-off moment according to the moment when the laser spot enters the current blade, the first speed, the second speed, the acceleration, the invalid scanning distance between the photovoltaic cell and the spot entry point of the current blade, and the scanning distance of the laser spot on the photovoltaic cell comprises: If the acceleration is 0, Calculating a time duration for the laser spot to sweep out the photovoltaic cell in the current blade according to a sum of the invalid scanning distance and the scanning distance and the first speed; Based on the moment when the laser spot enters the current leaf, the time duration of sweeping out the photovoltaic cell is extended to obtain the first initial closing moment of the laser; On the basis of the first initial closing time, the preset safety time is shortened to obtain the closing time of the laser.

4. The method according to claim 1, wherein The step of calculating the laser start-up time according to the time when the laser spot enters the current blade, the first speed, the second speed, the acceleration, and the invalid scanning distance between the photovoltaic cell and the light spot entry point of the current blade includes: If the acceleration is not 0, Calculating a second invalid scanning duration of the laser spot on the current blade according to the second speed, the invalid scanning distance and the acceleration; Based on the moment when the laser spot enters the current blade, the second invalid scanning time is extended to obtain the second initial start time of the laser; On the basis of the second initial start-up time, the preset safety time is extended to obtain the start-up time of the laser.

5. The method according to claim 1, characterized in that The step of calculating the laser shut-off moment according to the moment when the laser spot enters the current blade, the first speed, the second speed, the acceleration, the invalid scanning distance between the photovoltaic cell and the spot entry point of the current blade, and the scanning distance of the laser spot on the photovoltaic cell comprises: If the acceleration is not 0, Calculating a time duration for the laser spot to sweep out the photovoltaic cell in the current blade according to a sum of the invalid scanning distance and the scanning distance, the acceleration, and the second speed; Based on the moment when the laser spot enters the current leaf, the time duration of sweeping out the photovoltaic cell is extended to obtain a second initial closing moment of the laser; On the basis of the second initial closing time, the preset safety time is shortened to obtain the closing time of the laser.

6. The method according to any one of claims 2 to 5, characterized in that The method further comprises: Obtaining the power consumption required by the photovoltaic cell in one day; Calculating a single energy supply duration of the laser spot to the photovoltaic cell according to the closing time and the opening time of the laser on the photovoltaic cell; Calculating the power supplied by the laser to the photovoltaic cell based on the single energy supply duration, the rated speed of the wind turbine impeller, and the laser transmission power of the laser; If the supplied power is less than the consumed power, the laser transmission power and / or the scanning distance are adjusted so that the supplied power is greater than or equal to the consumed power.

7. A laser energy supply system, characterized in that: include: Laser, laser aiming and launching module, control module, The laser is used to emit laser light towards the laser aiming and emitting module; The laser aiming and emitting module is used to emit laser towards the blade, receive laser feedback signals, and send the laser feedback signals to the control module; The control module is used to receive the laser feedback signal and execute the method according to any one of claims 1 to 6.

8. A laser energy supply control device, characterized in that: The device comprises: A chord length acquisition module is used to determine the chord length when the laser spot scans the blade, and the chord length when the laser spot passes through the gap between two adjacent blades; Time recording module, used to record the moment when the laser spot enters and leaves each blade; a first velocity calculation module, configured to calculate, when the laser spot enters the current blade, a first velocity calculation module for calculating a first velocity of the laser spot leaving the previous blade based on the time when the laser spot enters and leaves the previous blade and the chord length when the laser spot scans through the previous blade, wherein the previous blade and the current blade are adjacent in the order in which the laser spot scans the blades; a second speed calculation module, configured to calculate a second speed at which the laser spot scans the current blade based on the moment when the laser spot leaves the previous blade, the moment when the laser spot enters the current blade, and the chord length when the laser spot passes through the gap between the previous blade and the current blade; an acceleration calculation module, configured to calculate the acceleration of the laser spot scanning the blade based on the first speed, the second speed, the moment when the laser spot leaves the previous blade, and the moment when the laser spot enters the current blade; a start-up time calculation module, configured to calculate the start-up time of the laser according to the time when the laser spot enters the current blade, the first speed, the second speed, the acceleration, and the invalid scanning distance between the photovoltaic cell and the point where the spot enters the current blade; The closing time calculation module is used to calculate the closing time of the laser based on the time when the laser spot enters the current blade, the first speed, the second speed, the acceleration, the invalid scanning distance between the photovoltaic cell and the light spot entry point of the current blade, and the scanning distance of the laser spot on the photovoltaic cell.

9. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the method according to any one of claims 1 to 6 by executing the computer instructions.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the method according to any one of claims 1 to 6.

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