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

Abstract

The invention relates to the technical field of laser energy supply, and discloses a laser energy supply control method and device and a laser energy supply system.The method comprises the steps that the chord length when a laser spot scans a blade and the chord length when the laser spot passes through a blade gap are determined; recording the moment when the laser spot enters and leaves each blade; when entering the current blade, calculating a first speed according to the moments of entering and leaving each blade and the chord length when scanning the previous blade; according to the moments of entering and leaving each blade, calculating a second speed according to the chord length when passing through the blade gap; calculating acceleration according to the first speed, the second speed and the moments of entering and leaving each blade; according to the moment of entering and leaving each blade, the first speed, the second speed, the accelerated speed and the invalid scanning distance, the starting moment is calculated; and the closing moment is calculated according to the moment of entering the current blade, the first speed, the second speed, the acceleration, the invalid scanning distance and the scanning distance. Start and stop of the laser can be accurately controlled.

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] As the main force in building a new power system, wind power has developed rapidly in recent years. Blades, as the wind-catching parts of wind turbines, are the core and valuable parts of wind turbines. Wind turbine blades are large in size and rotate at high speeds, and the operating environment is harsh. However, the condition monitoring of the outer surface of wind turbine blades has not been widely used, and power supply difficulties are one of the main bottlenecks restricting the development of blade outer surface condition monitoring.

[0003] At present, some products have been installed on the outer surface of the blade to monitor the blade status. The power supply mode is wired power supply or solar energy and battery combined power supply. Since the wind turbine blades are in high-speed rotation, the friction with the air is large, and the blade size is large, the wired power supply mode has a great impact on the wind turbine blades and is difficult to implement; since it is impossible to arrange a large area of ​​solar cells and batteries on the surface of the blades, the solar power supply power is small, and the stability and reliability are poor, which makes it difficult to meet the power supply needs of the monitoring sensor. Laser has the characteristics of high energy density, long transmission distance, and good directionality. With the development of laser technology, laser power supply will be a wireless power supply method with broad prospects.

[0004] Based on the characteristics of laser power supply, it can be applied to the 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 in high-speed rotation, and therefore, accurate aiming and start-stop control of laser power supply are difficult. Summary of the invention

[0005] In view of this, the embodiments of the present invention provide a laser power supply control method, device and laser power supply system to solve the problem that it is difficult to accurately start and stop 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 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, and the previous blade and the current blade are adjacent in the scanning sequence of the laser spot on each blade; calculate the laser spot according to 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 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; calculate the shutdown 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 the 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 according to the first speed and the second speed, and then calculates the turn-on and turn-off times of the laser according to 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 time when the laser spot enters the photovoltaic cell and the time when it leaves the photovoltaic cell can be accurately determined through the speed and acceleration of the laser spot. The turn-on and turn-off times of the laser are determined according to 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 fall into the photovoltaic cell accurately, thereby reducing the damage of the laser to the wind turbine.

[0009] In one embodiment, the start-up time of the laser 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 start-up time of the laser.

[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 a 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 start-up time of the laser 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 start-up time of the laser.

[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, 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, the acceleration, and the second 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 a second initial shut-off moment of the laser; based on the second initial shut-off moment, the preset safety time is shortened to obtain the laser shut-off moment.

[0013] In one embodiment, the method provided by the 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 energy 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 transmitting module, and a control module, wherein the laser is used to transmit laser to the laser aiming and transmitting module; the laser aiming and transmitting module is used to transmit laser to the blade, receive laser feedback signal, and send the laser feedback signal to the control module; the control module is used to receive the laser feedback signal and execute the laser power supply control method of the 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, 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; a time recording module, used to record 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, 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, the memory storing computer instructions, 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 implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying 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 It is a schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the 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 creative work are within the scope of protection of the present invention.

[0025] As the main force in building a new power system, wind power has developed rapidly in recent years. As the wind-catching component of a wind turbine, the blade is the core and valuable component of the wind turbine. Monitoring the blades of a wind turbine can timely understand the operating status of the wind turbine and increase the service life of the wind turbine blades. In order to monitor the blades, a monitoring device can be set on the outer surface of the blade to obtain information about the blade through the monitoring device, and the operating status of the blade can be monitored based on the information obtained.

[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, since a large number of solar panels cannot be covered on the wind turbine blades, the energy collected by a small number of solar panels is small, which is difficult to meet the power demand of the monitoring device. Lasers have the characteristics of high energy density, long transmission distance, and good directionality, and can realize power supply for monitoring devices. 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 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 signal, and send the laser feedback signal to the control module 4 .

[0029] In an optional embodiment, the laser aiming and emitting module 3 adjusts the size of the laser spot and the laser emission direction when emitting laser to the blade. After the laser aiming and emitting module 3 sends the laser to the blade, it will receive a laser feedback signal, through which it can be determined whether the laser has entered the blade, and the distance to the blade can be accurately measured.

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

[0031] The control module 4 is used to receive the laser feedback signal and calculate the opening and closing time of the laser.

[0032] Since the laser energy is relatively large, if the fan 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, a blade light energy receiving module is provided on the blade of the wind turbine generator set, including a photovoltaic cell 5, a DC-DC converter module 6, and a storage battery 7. The photovoltaic cell 5 is used to receive the light energy of the laser and convert the light energy 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 storage battery 7; the storage 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 achieve laser energy transmission under normal operation, it must be ensured that within a certain blade pitch angle range, the blade light energy receiving module can receive the laser emitted by the cabin light energy transmitting module.

[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 the schematic diagram of the laser spot scanning the blade. 1 is the chord length of the blade when the laser spot scans, t 0 The moment when the laser spot enters the blade, t 1 is the moment when the laser spot enters the photovoltaic cell, t 2 is the moment when the laser spot leaves the photovoltaic cell, t 3 is the moment when the laser spot leaves the leaf, l is the scanning distance of the laser spot in the photovoltaic panel, and the scanning distance can be determined according to the scanning route of the laser spot in the photovoltaic cell. Figure 2 The length of the photovoltaic cell is used as the scanning distance, and the technical solution of the present invention is not limited. Δl is the scanning distance of the laser spot after it enters the blade and before it enters the photovoltaic cell. In the process of high-speed rotation of the wind turbine blade, in order to ensure the energy transmission efficiency and blade safety, it is necessary to accurately control the start and stop time of the laser, that is, it is necessary to control t 1 and t 2 Perform calculations.

[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 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 are corresponding spot entry points and spot exit points on the blade. The spot entry point refers to the point on the blade corresponding to when the laser spot enters the blade for the first time 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 spot entry point and the spot exit point as endpoints.

[0044] The chord length when the laser spot passes 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 basically not change, if the laser emission angle is not adjusted, 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 can be calibrated once every preset time period, and the preset time period can be one month, half a year, etc. However, if the laser emission angle needs to be adjusted, the laser spot entry point and the laser spot exit point on the blade will change after the laser emission angle is adjusted. At this time, the chord length of the laser spot scanning the blade and the chord length of the laser spot between the two blades will change. Therefore, each time the laser emission angle is adjusted, 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 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 out a signal, a reflection signal will be received, and it can be judged based on the reflection signal whether the laser spot enters or leaves the blade after the laser is emitted at this time.

[0048] In an optional embodiment, the laser aiming and transmitting module can continuously transmit a detection signal, and the position and angle of the detection signal are the same as when the power laser is emitted. After the laser aiming and transmitting module emits the detection signal, it can judge whether the detection signal enters or leaves the blade at this time according to the reflection signal of the detection signal. If it is judged that the detection signal enters the blade at this time, it means that after the power laser is currently emitted, the laser spot of the power laser will also enter the blade. If it is judged that the detection signal leaves the blade at this time, it means that after the power laser is currently emitted, the laser spot of the power laser will also leave the blade. The detection signal can be any one of a laser, a radar wave or an ultrasonic wave for ranging, wherein the energy of the laser for ranging is less than the energy when powering the photovoltaic cell, and will not cause damage to the blade.

[0049] Exemplarily, 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, it is determined that the laser spot has entered the blade; or, if the signal characteristics of the reflected signal are consistent with the preset signal characteristics, 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 are inconsistent with the preset signal characteristics, 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, each 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 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, 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, L 1 is the chord length of the laser spot when scanning the previous leaf, t 0 is the moment when the laser spot enters the current leaf, L 2 is the chord length when the laser spot passes through the gap between the previous blade and the current blade.

[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 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 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 power 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 the 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 according to the first speed and the second speed, and then calculates the turn-on and turn-off times of the laser according to 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 time when the laser spot enters the photovoltaic cell and the time when it leaves the photovoltaic cell can be accurately determined through the speed and acceleration of the laser spot. The turn-on and turn-off times of the laser are determined according to 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 fall into the photovoltaic cell accurately, thereby reducing 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 start time of the laser includes:

[0067] Step a1, calculating the 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 invalid scanning time length of the laser spot on the current blade is determined according to the product of the first speed and the invalid scanning distance.

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

[0070] Step a3, based on the first initial start-up time, extend the preset safety time to obtain the start-up time of the laser.

[0071] In a specific embodiment, when a=0, the laser is turned on at time t 1 for:

[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, L 1 is the chord length of the laser spot when scanning the previous leaf, t 0 is the moment when the laser spot enters the current blade, 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 time, extending the preset safety time to obtain the start-up time can further ensure that after the laser is turned on, the laser spot falls into the photovoltaic cell, thereby preventing the laser spot from falling on the blades and causing damage to the blades.

[0075] The preset safety time can be set in combination with parameters such as the scanning speed of the laser spot, the scanning distance of the laser spot on the photovoltaic cell, etc. The value of the preset safety time is not specifically limited in the embodiment of the present invention. By way of 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; and 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 length for the laser spot to scan 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, extend the time of scanning out the photovoltaic cell to obtain the first initial closing moment of the laser.

[0080] Step b3, based on the first initial closing time, shorten the preset safety 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, L 1 is the chord length of the laser spot when scanning the previous leaf, t 0 is the moment when the laser spot enters the current blade, 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 start time of the laser 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, extend the preset safety time 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, t 0 is the moment when the laser spot enters the current blade, a is the acceleration, v 2 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 length 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 scanning out the photovoltaic cell is extended to obtain the second initial closing moment of the laser.

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

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

[0096]

[0097] Among them, t 0 is the moment when the laser spot enters the current blade, a is the acceleration, v 2 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, obtaining 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 one day is determined according to the power consumption of the monitoring module in one day.

[0101] Step e2, calculating the 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.

[0102] Step e3, calculating the power supply energy of the laser to the photovoltaic cell according to the single energy supply duration, the rated speed of the wind turbine impeller, and the laser transmission power of the laser.

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

[0104]

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

[0106]

[0107] Among them, E 1 represents the power supply from 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 leaf, L 1 is the chord length of the laser spot when scanning the previous blade, Δt is the preset safety time, Δl is the invalid scanning distance, a is the acceleration, v 2 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 impeller.

[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 electrical energy is greater than or equal to the consumed electrical energy.

[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. The specific value is determined according to the on-site situation. If it exceeds this safety range, 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 to a photovoltaic cell, the reflected signal of the laser 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. At this time, in order to ensure safety, it is necessary to immediately turn off the laser and stop emitting the laser.

[0115] In this embodiment, a laser power supply control device is also provided, which is used to implement the above-mentioned embodiments and preferred implementation modes, and the descriptions that have been made will not be repeated. As used below, the term "module" can implement a combination of software and / or hardware of a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[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 time when the laser spot enters and leaves each blade;

[0119] A first speed calculation module 403, 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 time 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;

[0120] The second speed calculation module 404 is used to calculate the second speed of the laser spot scanning the current blade according to 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 according to 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 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;

[0123] The closing time calculation module 407 is used to calculate the closing time of the laser 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.

[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 schematic diagram of the structure of a computer device provided by an optional embodiment of the present invention, such as Figure 5As shown, the computer device includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Various components are connected to each other using different buses for communication, 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 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. Similarly, multiple computer devices can be connected, and each device provides some 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 a dedicated 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 executable by at least one processor 10, so that at least one processor 10 executes 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 by the use of a computer device based on the presentation of 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 arranged 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 combinations 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 the user settings and function control of the computer device, such as a touch screen, a keypad, a mouse, a track pad, a touch pad, an indicator bar, one or more mouse buttons, a trackball, a joystick, etc. The output device 40 may include a display device, an auxiliary lighting device (e.g., an LED) and a tactile feedback device (e.g., a vibration motor), etc. 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 method according to the embodiment of the present invention can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, 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 hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. 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 in conjunction with 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, and 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 blade; When the laser spot enters the current blade, Calculate the first speed of the laser spot leaving the previous blade according to 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, and the previous blade and the current blade are adjacent in the scanning order of the laser spot on each blade; Calculate a second speed of the laser spot scanning the current 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 chord length when the laser spot passes through the gap between the previous blade and 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 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 spot entry point of the current blade; The laser shut-off time is calculated 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.

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 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 closing time of the laser 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 comprises: If the acceleration is 0, Calculating the duration of the laser spot sweeping 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; 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; 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, 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 spot entry point of the current blade includes: If the acceleration is not zero, 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-up moment 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 closing time of the laser 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 comprises: If the acceleration is not zero, Calculating the duration of the laser spot sweeping 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; Based on the moment when the laser spot enters the current blade, the 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; Calculate the 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 supply energy of the laser to the photovoltaic cell according to the single energy supply duration, the rated speed of the wind turbine impeller, and the laser transmission power of the laser; If the supplied electric energy is less than the consumed electric energy, the laser transmission power and / or the scanning distance are adjusted so that the supplied electric energy is greater than or equal to the consumed electric energy.

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 to the laser aiming and emitting module; The laser aiming and emitting module is used to emit laser to the blade, receive laser feedback signal, and send the laser feedback signal 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 1-6.

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; A time recording module is used to record the moment when the laser spot enters and leaves each blade; 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 time 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; A second speed calculation module, used for calculating a second speed of the laser spot scanning the current 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 chord length when the laser spot passes through the gap between the previous blade and the current blade; an acceleration calculation module, used for 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; A start-up time calculation module, used 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 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 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.

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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