Wireless charging method and device for lawn mower and lawn mower system

Abstract

The present application discloses a wireless charging method, device and lawn mower system for a lawn mower, which receives charging request information sent by a lawn mower within a preset range and obtains the rated charging power of the lawn mower that needs to be charged; adjusts the charging power of the charging device according to the rated charging power of the lawn mower; that is, after the lawn mower enters the charging range of the charging station, the charging station obtains the rated charging power of the lawn mower, and adjusts the charging power according to the rated charging power to meet the needs of the lawn mower, and when the charging power is adjusted to a preset power threshold and the power received by the lawn mower is still less than the rated charging power, it means that the misalignment distance between the lawn mower and the charging device is large at this time, and charging is stopped at this time, and a warning signal is issued or the position of the lawn mower is adjusted automatically to adjust the misalignment distance between the lawn mower and the charging device, thereby avoiding inefficient charging of the lawn mower, which can reduce energy waste and improve the charging efficiency of the lawn mower.

Description

Technical Field

[0001] The present application relates to the field of electronic communication technology, and in particular to a wireless charging method and device for a lawn mower and a lawn mower system. Background Art

[0002] At present, wireless charging technology has been widely used in the field of electronic products, and its coverage has rapidly expanded from small portable devices such as smartphones and electronic watches to medium and high power industrial electronics, such as various service and inspection robots. With the development of the industrial electronics field, the safety of medium and high power wireless charging has been recognized by the majority of users. At the same time, people are increasingly pursuing intelligent household appliances to liberate manpower, among which convenience and safety have become the current trend.

[0003] A lawn mower is an electrical device that is often used in daily life. An automated lawn mower is an evolution of traditional manual mowing. It is an automated device that is easy to use and can liberate manpower. At present, there are also intelligent devices such as mowing robots on the market, which realize unmanned operation and have a high degree of automation, which can save manpower to a great extent. The battery capacity and power usually used in lawn mowers are small. In large-scale mowing operations, the continuous working time is required to be long. If the distance from the charging device is far, it needs to be returned for charging many times. Therefore, charging equipment (such as charging piles, etc.) can be set on the lawn. Currently, the commonly used charging equipment is mostly wired charging, contact charging or wireless charging. Wired charging requires manual participation, which is not conducive to the automation development of lawn mowers and reduces the charging efficiency of lawn mowers (it cannot be charged as needed); the contact charging method has charging failures or safety issues due to its exposed electrodes, which is not conducive to the automation development of lawn mowers and also reduces the charging efficiency of lawn mowers. Although wireless charging can be used at any time, if only wireless charging is implemented without evaluating and considering the efficiency of wireless charging, it will directly lead to energy waste and low charging efficiency. Summary of the invention

[0004] In order to solve the above technical problems, the present application is proposed. The embodiments of the present application provide a wireless charging method and device for a lawn mower and a lawn mower system, which solve the problem of low wireless charging efficiency of the above lawn mower.

[0005] According to one aspect of the present application, a wireless charging method for a lawn mower is provided, which is applied to a charging device, wherein the charging device is wirelessly connected to the lawn mower to charge the lawn mower, and the wireless charging method comprises: obtaining the rated charging power of the lawn mower; adjusting the charging power of the charging device according to the rated charging power of the lawn mower so that the difference between the charging power of the charging device and the rated charging power of the lawn mower is reduced; and stopping charging when the charging power of the charging device is adjusted to be greater than or equal to a preset power threshold and the received power received by the lawn mower is less than the rated charging power of the lawn mower.

[0006] In one embodiment, before obtaining the rated charging power of the lawn mower, the wireless charging method further includes: receiving charging request information sent by the lawn mower; and obtaining the rated charging power of the lawn mower includes: obtaining the rated charging power of the lawn mower based on the charging request information.

[0007] In one embodiment, the receiving the charging request information sent by the lawn mower includes: receiving the charging request information sent by the lawn mower within a preset distance range of the charging device.

[0008] In one embodiment, before receiving the charging request information sent by the lawn mower within a preset distance range of the charging device, the wireless charging method further includes: emitting detection energy within the preset distance range to form an alternating electromagnetic field; receiving a communication connection request sent by the lawn mower; wherein the lawn mower sends the communication connection request after receiving the detection energy in the alternating electromagnetic field; and based on the communication connection request, communicating and connecting the lawn mower.

[0009] In one embodiment, emitting the detection energy within the preset distance range to form the alternating electromagnetic field includes: periodically emitting the detection energy within the preset distance range to form the alternating electromagnetic field.

[0010] In one embodiment, after the communication connection with the lawn mower, the wireless charging method further includes: obtaining a change in the alternating electromagnetic field; and when the change in the alternating electromagnetic field is greater than a preset change threshold, stopping charging and issuing a foreign object warning signal.

[0011] In one embodiment, the wireless charging method further includes: when the charging power of the charging device is adjusted to be less than the power threshold and the received power received by the lawn mower is greater than or equal to the rated charging power of the lawn mower, maintaining the charging power of the charging device to charge the lawn mower.

[0012] In one embodiment, adjusting the charging power of the charging device according to the rated charging power of the lawn mower includes: adjusting a duty cycle of a charging current of the charging device according to the rated charging power of the lawn mower.

[0013] In one embodiment, when the charging power of the charging device is adjusted to be greater than or equal to a preset power threshold and the received power received by the lawn mower is less than the rated charging power of the lawn mower, stopping charging includes: when the duty cycle of the charging current of the charging device is adjusted to a maximum value and the received power of the lawn mower is less than the rated charging power of the lawn mower, stopping charging.

[0014] In one embodiment, after stopping charging, the wireless charging method further comprises: issuing an abnormal warning signal, and / or sending an adjustment instruction to the lawn mower to adjust the relative position between the lawn mower and the charging device.

[0015] According to another aspect of the present application, a wireless charging device for a lawn mower is provided, which is arranged on a charging device, and the charging device is wirelessly connected to the lawn mower to charge the lawn mower, characterized in that the wireless charging device includes: an acquisition module, used to acquire the rated charging power of the lawn mower; an adjustment module, used to adjust the charging power of the charging device according to the rated charging power of the lawn mower, so that the difference between the charging power of the charging device and the rated charging power of the lawn mower is reduced; and an execution module, used to stop charging when the charging power of the charging device is adjusted to be greater than or equal to a preset power threshold and the received power received by the lawn mower is less than the rated charging power of the lawn mower.

[0016] According to another aspect of the present application, a wireless charging system for a lawn mower is provided, comprising: a lawn mower, the lawn mower comprising a charging receiving device; and a charging device, the charging device comprising a charging transmitting device, the charging transmitting device being wirelessly connected to the charging receiving device to charge the lawn mower; wherein the charging transmitting device is used to execute any of the wireless charging methods for a lawn mower described above.

[0017] The present application provides a wireless charging method, device and lawn mower system. After the lawn mower enters the charging range of the charging station, the charging station obtains the rated charging power of the lawn mower and adjusts the charging power according to the rated charging power to meet the needs of the lawn mower. When the charging power is adjusted to a preset power threshold and the power received by the lawn mower is still less than the rated charging power, it means that the lawn mower is charging abnormally and charging is stopped, thereby avoiding inefficient charging of the lawn mower, which can reduce energy waste and improve the charging efficiency of the lawn mower. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By describing the embodiments of the present application in more detail in conjunction with the accompanying drawings, the above and other purposes, features and advantages of the present application will become more apparent. The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0019] Figure 1 It is a schematic diagram of the structure of a wireless charging system for a lawn mower provided by an exemplary embodiment of the present application.

[0020] Figure 2 It is a flowchart of a wireless charging method for a lawn mower provided by an exemplary embodiment of the present application.

[0021] Figure 3 It is a flowchart of a wireless charging method for a lawn mower provided by another exemplary embodiment of the present application.

[0022] Figure 4 It is a flowchart of a wireless charging method for a lawn mower provided by another exemplary embodiment of the present application.

[0023] Figure 5 It is a flowchart of a wireless charging method for a lawn mower provided by another exemplary embodiment of the present application.

[0024] Figure 6 It is a flowchart of a wireless charging method for a lawn mower provided by another exemplary embodiment of the present application.

[0025] Figure 7 It is a flowchart of a wireless charging method for a lawn mower provided by another exemplary embodiment of the present application.

[0026] Figure 8 It is a flowchart of a wireless charging method for a lawn mower provided by another exemplary embodiment of the present application.

[0027] Fig. 9 It is a schematic structural diagram of a wireless charging device for a lawn mower provided by an exemplary embodiment of the present application.

[0028] Fig.10 It is a schematic structural diagram of a wireless charging device for a lawn mower provided by another exemplary embodiment of the present application.

[0029] Fig.11 It is a structural diagram of an electronic device provided by an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0030] Below, the exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the exemplary embodiments described here.

[0031] Application Overview

[0032] With the continuous development of intelligence, mechanical equipment has gradually realized automated or semi-automated operations, such as lawn mowers, and the basis of automation or semi-automation is electrification, such as electric lawn mowers. For scenes with large lawn areas, the electric energy stored in electric lawn mowers is difficult to meet the operating needs of the entire lawn. Therefore, electric lawn mowers need to be supplemented with electricity. The way to supplement electricity can be to replace batteries, wired charging, electric shock charging, and wireless charging.

[0033] For battery replacement, manual operation is required, the degree of automation is low, and spare batteries need to be prepared, which will also increase the cost of use. For wired charging, when the lawn area is large, a longer power cord will be required, and the longer power cord may cause safety hazards such as power cord entanglement and power cord entanglement with the lawn mower, and wired charging also requires manual operation, and the degree of automation is low. For electric shock charging, although there is no safety hazard caused by a long power cord, since the metal electrodes of the charging device need to be exposed to achieve contact charging, the exposed electrodes will have problems such as oxidation, electric shock, and charging failure caused by electrode contamination. In actual work, lawn mowers usually carry water, soil and other debris, and these debris will also bring safety hazards when they come into contact with the metal electrodes. In addition, the electric shock charging method requires the charging port of the lawn mower to be aligned with the metal electrode of the charging device, which is more difficult. For wireless charging, magnetic induction and magnetic resonance can be used. There is neither a power cord problem nor a safety hazard of exposed metal electrodes, and automatic charging can also be achieved. Therefore, this application uses wireless charging to supplement the power of the lawn mower.

[0034] For electromagnetic induction wireless charging, since it requires the charging coil (located on the charging device) and the receiving coil (located on the lawn mower) to be close in air distance (less than 1 cm), if electromagnetic induction wireless charging is adopted, the positioning requirements for the lawn mower and the charging device are high, and the power and efficiency of electromagnetic induction are low. Therefore, the present application adopts magnetic resonance wireless charging, which uses the magnetic resonance of the charging coil and the receiving coil to achieve energy transfer, thereby replenishing the power of the lawn mower, and since the magnetic resonance wireless charging method has a low requirement for the air distance between the charging coil and the receiving coil (less than 3 cm), it can effectively reduce the positioning requirements for the lawn mower and the charging device.

[0035] For the wireless charging method of magnetic resonance, if the misalignment distance between the lawn mower and the charging device is large (for example, greater than 2.5 cm), the charging efficiency will be low, which will not only waste energy, but also reduce the charging efficiency of the lawn mower. In order to solve the problem of charging efficiency of the lawn mower, this application establishes a communication connection between the lawn mower and the charging device. After obtaining the rated charging power of the lawn mower (that is, the rated charging power of the lawn mower), the charging power of the charging device is adjusted according to the rated charging power to meet the high-power charging, that is, the lawn mowers with different powers can adjust the charging power by themselves to improve the charging efficiency; and in the process of adjusting the charging power, when the charging power is adjusted to the upper limit, it still cannot meet the rated charging power requirement of the lawn mower, which means that the misalignment distance between the lawn mower and the charging device is large, that is, the lawn mower is charging abnormally. This application adjusts the charging power to meet the charging process of the lawn mowers with various power requirements, and monitors the charging effect during the adjustment process. When abnormal charging such as a large misalignment distance occurs, the charging is stopped or prompted to avoid inefficient charging.

[0036] Exemplary Systems

[0037] Figure 1 FIG. 1 is a schematic diagram of a wireless charging system for a lawn mower provided by an exemplary embodiment of the present application. Figure 1 As shown, the wireless charging includes: a lawn mower 1 and a charging device 2, wherein the charging device 2 is arranged on the lawn (for example, at least one charging device 2 is arranged on the lawn according to a preset distance); wherein the lawn mower 1 includes a charging receiving device 10, and the charging device 2 includes a charging transmitting device 20, the charging device 2 is connected to the municipal network through an underground cable, and the charging transmitting device 20 is wirelessly connected to the charging receiving device 10 to charge the lawn mower.

[0038] The charging receiving device 10 is arranged on a side of the lawn mower 1 that is convenient for approaching the charging device 2, and the charging receiving device 10 includes a receiving coil 11 and a receiving control unit 12, etc. The charging transmitting device 20 is arranged on one side of the charging device 2, and the charging transmitting device 20 includes a transmitting coil 21 and a transmitting control unit 22, etc. The receiving control unit 12 is connected in communication with the transmitting control unit 22 to realize the interaction of information and data. The transmitting control unit 22 is used to control the operation of the transmitting coil 21, and the receiving control unit 12 is used to control the operation of the receiving coil 11. Specifically, the present application can adopt a wireless working frequency band of the kilohertz level to avoid interference from other important working frequency bands, thereby further enhancing the stability of the charging work and the anti-interference ability of the data interaction.

[0039] Exemplary Methods

[0040] Figure 2FIG. 1 is a flow chart of a wireless charging method for a lawn mower provided by an exemplary embodiment of the present application. The wireless charging method for a lawn mower is applied to a transmitting control unit of a charging device, such as Figure 1 As shown, the wireless charging method includes:

[0041] Step 110: Obtain the rated charging power of the lawn mower.

[0042] When the lawn mower needs to be charged, the charging device communicates data with the corresponding lawn mower to obtain the rated charging power of the lawn mower. That is, the charging device asks the lawn mower for its rated charging power value to facilitate the charging device to determine its charging power.

[0043] Step 120: According to the rated charging power of the lawn mower, the charging power of the charging device is adjusted so that the difference between the charging power of the charging device and the rated charging power of the lawn mower is reduced.

[0044] Specifically, the charging device can increase or decrease the output energy or charging power by adjusting parameters such as the duty cycle of its charging current. After knowing the rated charging power of the lawn mower, the charging device adjusts its charging power according to the rated charging power so that the difference between the charging power of the charging device and the rated charging power of the lawn mower is reduced. For example, when the current charging power is greater than the rated charging power, the duty cycle of the charging current is reduced to reduce the charging power. For another example, when the current charging power is less than the rated charging power, the duty cycle of the charging current is increased to increase the charging power so that the difference between the charging power of the charging device and the rated charging power of the lawn mower is reduced. That is, by adjusting the duty cycle of the charging current of the charging device, the charging power of the charging device is equal to or approximately equal to the rated charging power of the lawn mower, thereby maximizing the charging efficiency while ensuring that the service life of the lawn mower and its battery is not affected.

[0045] Step 130: When the charging power of the charging device is adjusted to be greater than or equal to a preset power threshold, and the received power received by the lawn mower is less than the rated charging power of the lawn mower, charging is stopped.

[0046] Specifically, when the charging power of the charging device is adjusted to be greater than or equal to the preset power threshold, the received power received by the lawn mower is still less than the rated charging power of the lawn mower, which means that a large part of the energy emitted by the charging device is not received by the lawn mower, that is, the energy waste in the current charging process is large. At this time, it is determined that the lawn mower is charging abnormally and charging should be stopped. The power threshold can be the power value corresponding to the maximum duty cycle of the charging current of the charging device, or it can be a fixed multiple of the rated charging power (for example, 1.2 times, etc.).

[0047] The wireless charging method for a lawn mower provided in the present application obtains the rated charging power of the lawn mower that needs to be charged; and adjusts the charging power of the charging device according to the rated charging power of the lawn mower. When the charging power of the charging device is adjusted to be greater than or equal to a preset power threshold and the received power received by the lawn mower is less than the rated charging power of the lawn mower, charging is stopped. That is, after the lawn mower enters the charging range of the charging station, the charging station obtains the rated charging power of the lawn mower, and adjusts the charging power according to the rated charging power to meet the needs of the lawn mower. When the charging power is adjusted to the preset power threshold and the power received by the lawn mower is still less than the rated charging power, it means that the lawn mower is charging abnormally at this time, and charging is stopped, thereby avoiding inefficient charging of the lawn mower, which can not only reduce energy waste, but also improve the charging efficiency of the lawn mower.

[0048] Figure 3 FIG. 1 is a flow chart of a wireless charging method for a lawn mower provided by another exemplary embodiment of the present application. Figure 3 As shown, before step 110, the wireless charging method may further include:

[0049] Step 140: Receive charging request information sent by the lawn mower.

[0050] In one embodiment, the specific implementation of step 140 may be: receiving a charging request message sent by a lawn mower within a preset distance range of a charging device. The preset distance range may be preset, for example, it may be set to allow a maximum range of air misalignment between the lawn mower and the charging device. When a lawn mower enters the preset distance range of the charging device and the lawn mower sends a charging request message, the lawn mower needs to be charged.

[0051] Correspondingly, step 110 is adjusted to: based on the charging request information, obtaining the rated charging power of the lawn mower.

[0052] Figure 4 FIG. 1 is a flow chart of a wireless charging method for a lawn mower provided by another exemplary embodiment of the present application. Figure 4 As shown, after step 130, the wireless charging method may further include any one or a combination of two of the following steps:

[0053] Step 150: Sending an abnormal warning signal.

[0054] Step 160: Send an adjustment instruction to the lawn mower to adjust the relative position between the lawn mower and the charging device.

[0055] In order to avoid energy waste and inefficient charging process, the present application stops charging the charging device when confirming that the lawn mower is charging abnormally. The present application can also send an abnormal warning signal to remind the operator to make manual corrections before charging. It should be understood that the abnormal warning signal in the present application can be an audio-visual warning signal to remind nearby operators, or it can send the abnormal warning signal to the management background or the operator's mobile communication device based on the communication network. The present application can also send an adjustment instruction to the lawn mower to adjust the relative position between the lawn mower and the charging device, so that the lawn mower can automatically adjust its position to reduce the misalignment distance between the lawn mower and the charging device, until the charging power of the charging device does not exceed the power threshold and can also meet the received power received by the lawn mower equal to or approximately equal to the rated charging power, thereby realizing the automatic charging of the lawn mower and completely eliminating the dependence of the charging process on the operator. It should be understood that when determining that the lawn mower is charging abnormally, the present application can perform one of the above steps alone, or it can perform multiple steps simultaneously or successively. It should be understood that the present application may also adopt other methods to improve the charging efficiency, such as adjusting the transmission frequency of the charging device to change the receiving power value of the lawn mower, thereby meeting the charging efficiency requirements without adjusting the position of the lawn mower.

[0056] Figure 5 FIG. 1 is a flow chart of a wireless charging method for a lawn mower provided by another exemplary embodiment of the present application. Figure 5 As shown, before step 110, the wireless charging method may further include:

[0057] Step 170: Transmit detection energy within a preset distance range to form an alternating electromagnetic field.

[0058] The charging device can periodically emit detection energy within the preset distance range to form an alternating electromagnetic field, and the lawn mower can receive the detection energy when it enters the preset distance range, wherein the detection energy can be a detection signal wave with a very small energy level.

[0059] Step 180: Receive a communication connection request sent by the lawn mower.

[0060] Among them, the lawn mower can send a communication connection request after receiving the detection energy in the alternating electromagnetic field. The lawn mower receives the detection energy, which means that the charging device can be used normally. After receiving the detection energy, the lawn mower can send a communication connection request to realize the communication connection between the charging vehicle and the lawn mower. When the lawn mower enters the preset range of the charging device but does not receive the detection energy, it means that the charging device may be faulty and cannot transmit the detection energy. At this time, a warning or notification message can be sent to the operator, or the lawn mower can be controlled to enter the preset range of other charging devices for charging.

[0061] Step 190: Based on the communication connection request, communicate with the lawn mower.

[0062] When the charging device receives the communication connection request sent by the lawn mower, it means that the charging device can charge normally and the communication is normal, and the lawn mower communication is normal. At this time, the communication connection between the charging device and the lawn mower is to realize the handshake communication before charging, which is convenient for the subsequent data and information exchange in the charging process.

[0063] Figure 6 FIG. 1 is a flow chart of a wireless charging method for a lawn mower provided by another exemplary embodiment of the present application. Figure 6 As shown, after step 190, the wireless charging method may further include:

[0064] Step 1100: Obtain the change in the alternating electromagnetic field.

[0065] After the variation of the alternating electromagnetic field is obtained, the relationship between the variation of the alternating electromagnetic field and a preset variation threshold is determined. When the variation of the alternating electromagnetic field is greater than the preset variation threshold, step 1110 is executed; otherwise, step 110 is executed.

[0066] Step 1110: Stop charging and send a foreign object warning signal.

[0067] Since the working environment of the lawn mower is relatively open, the lawn mower is likely to stick to some conductive foreign objects, such as metal foreign objects, during operation. During the charging process, the metal foreign objects will heat up, melt, or even catch fire. The melting and catching fire of metal foreign objects are likely to cause damage to the lawn mower and the charging device and more serious safety accidents. Therefore, after the charging device is matched and connected with the lawn mower, the present application further considers whether there is a metal foreign object (such as a coin, etc.) between the transmitting coil of the charging device and the receiving coil of the lawn mower. Specifically, since the presence of metal foreign objects will change the magnetic field change of the transmitting coil, by detecting the change in the above-mentioned alternating electromagnetic field, when the change in the alternating electromagnetic field is greater than the preset change threshold, it means that there may be a metal foreign object between the transmitting coil and the receiving coil. At this time, charging will be stopped and a foreign object warning signal will be issued to avoid safety accidents. If it is determined that there is no metal foreign object between the transmitting coil and the receiving coil by detecting the change in the alternating electromagnetic field, the charging device can transmit energy to replenish the power of the lawn mower.

[0068] Figure 7 FIG. 1 is a flow chart of a wireless charging method for a lawn mower provided by another exemplary embodiment of the present application. Figure 7 As shown, the wireless charging method may further include:

[0069] Step 1120: When the charging power of the charging device is adjusted to be less than the power threshold, and the received power received by the lawn mower is greater than or equal to the rated charging power of the lawn mower, the charging power of the charging device is maintained to charge the lawn mower.

[0070] When the charging power of the charging device is adjusted to a value less than the power threshold, the received power received by the lawn mower is greater than or equal to the rated charging power of the lawn mower, which means that most of the energy emitted by the charging device has been received by the lawn mower. At this time, the charging power of the charging device can be maintained to charge the lawn mower to maintain the received power received by the lawn mower equal to or approximately equal to the rated charging power, thereby ensuring the charging efficiency and the service life of the lawn mower.

[0071] Figure 8 FIG. 1 is a flow chart of a wireless charging method for a lawn mower provided by another exemplary embodiment of the present application. Figure 8 As shown, the wireless charging method includes:

[0072] Step 810: Enter the standby state and transmit detection energy.

[0073] After the charging device is powered on, it enters the standby state and periodically transmits detection energy to detect whether the receiving coil (corresponding to the lawn mower) is within the corresponding air gap misalignment range.

[0074] Step 820 : Determine whether a lawn mower enters the preset distance range of the charging device. If so, go to step 830 ; otherwise, go to step 810 .

[0075] Step 830: Receive a communication connection request sent by the lawn mower.

[0076] If the receiving coil is in an alternating electromagnetic field established by the transmitting coil transmitting the detection energy and receives the detection energy, the lawn mower activates its wireless communication unit and sends a communication connection request to establish a handshake communication between the lawn mower and the charging device.

[0077] Step 840 : Determine whether there is a metal foreign object between the charging device and the lawn mower. If so, go to step 850 ; otherwise, go to step 860 .

[0078] Step 850: Start charging.

[0079] If there is no metal foreign matter between the charging device and the lawn mower, the required energy is transmitted through the transmitting coil according to the charging current value required by the lawn mower, and the energy is transmitted to the battery unit of the lawn mower through the receiving coil.

[0080] Step 860: Stop charging and issue a foreign object warning signal.

[0081] If there is a metal foreign object between the charging device and the lawn mower, a charging termination signal and a charging abnormality signal will be sent out, and the machine will enter the standby state.

[0082] Step 870: Adjust the charging power of the charging device according to the rated charging power of the lawn mower.

[0083] According to the target output power of the lawn mower, the duty cycle and other parameters are adjusted to increase or decrease the output energy or power.

[0084] Step 880: When the charging power of the charging device is adjusted to be less than the power threshold, and the received power received by the lawn mower is greater than or equal to the rated charging power of the lawn mower, the charging power of the charging device is maintained to charge the lawn mower.

[0085] If the lawn mower can achieve the target energy output before the duty cycle of the charging current of the charging device is adjusted to the maximum value, the charging device can stably output the energy.

[0086] Step 890: When the charging power of the charging device is adjusted to be greater than or equal to a preset power threshold, and the received power received by the lawn mower is less than the rated charging power of the lawn mower, stop charging.

[0087] If the duty cycle of the charging current of the charging device is adjusted to the maximum value and still cannot reach the target output energy of the lawn mower, it may be due to the coil misalignment or excessive spacing. At this time, the charging device stops transmitting energy and enters standby mode.

[0088] Exemplary Devices

[0089] Fig. 9 FIG. 1 is a schematic diagram of a wireless charging device for a lawn mower provided by an exemplary embodiment of the present application. Fig. 9 As shown, the wireless charging device 90 is arranged on a charging device, and the charging device is wirelessly connected to the lawn mower to charge the lawn mower. The wireless charging device 90 includes: an acquisition module 91, used to obtain the rated charging power of the lawn mower; an adjustment module 92, used to adjust the charging power of the charging device according to the rated charging power of the lawn mower, so that the difference between the charging power of the charging device and the rated charging power of the lawn mower is reduced; and an execution module 93, used to stop charging when the charging power of the charging device is adjusted to be greater than or equal to a preset power threshold and the received power received by the lawn mower is less than the rated charging power of the lawn mower.

[0090] The wireless charging device for a lawn mower provided in the present application obtains the rated charging power of the lawn mower that needs to be charged through an acquisition module 91; then, the adjustment module 92 adjusts the charging power of the charging device according to the rated charging power of the lawn mower so that the difference between the charging power of the charging device and the rated charging power of the lawn mower is reduced. When the charging power of the charging device is adjusted to be greater than or equal to a preset power threshold, and the received power received by the lawn mower is less than the rated charging power of the lawn mower, the execution module 93 stops charging; that is, after the lawn mower enters the charging range of the charging station, the charging station obtains the rated charging power of the lawn mower, and adjusts the charging power according to the rated charging power to meet the needs of the lawn mower. When the charging power is adjusted to the preset power threshold and the power received by the lawn mower is still less than the rated charging power, it means that the lawn mower is abnormally charged at this time, and charging is stopped, thereby avoiding inefficient charging of the lawn mower, which can reduce energy waste and improve the charging efficiency of the lawn mower.

[0091] Fig.10 FIG. 1 is a schematic diagram of a wireless charging device for a lawn mower provided by another exemplary embodiment of the present application. Fig.10 As shown, the wireless charging device 90 may further include: a receiving module 94, configured to receive charging request information sent by the lawn mower. Correspondingly, the acquisition module 91 is configured to: acquire the rated charging power of the lawn mower based on the charging request information.

[0092] In one embodiment, if Fig.10 As shown, the wireless charging device 90 may further include: a warning module 95 for sending an abnormal warning signal; and a position adjustment module 96 for sending an adjustment instruction to the lawn mower to adjust the relative position between the lawn mower and the charging device.

[0093] In one embodiment, if Fig.10 As shown, the wireless charging device 90 may also include: a detection module 97, which is used to transmit detection energy within a preset range to form an alternating electromagnetic field; a communication connection module 98, which is used to receive a communication connection request sent by the lawn mower; and a matching connection module 99, which is used to match and connect the lawn mower based on the communication connection request.

[0094] In one embodiment, if Fig.10 As shown, the wireless charging device 90 may further include: a magnetic field change acquisition module 910, for acquiring the change amount of the alternating electromagnetic field; correspondingly, when the change amount of the alternating electromagnetic field is greater than a preset change amount threshold, the warning module 95 is further configured to: issue a foreign object warning signal.

[0095] In one embodiment, if Fig.10As shown, the wireless charging device 90 may further include: a power maintaining module 911, which is used to maintain the charging power of the charging device to charge the lawn mower when the charging power of the charging device is adjusted to less than a power threshold and the received power received by the lawn mower is greater than or equal to the rated charging power of the lawn mower.

[0096] Exemplary Electronic Devices

[0097] Below, reference Fig.11 The electronic device according to the embodiment of the present application is described. The electronic device may be any one or both of the first device and the second device, or a stand-alone device independent of them, and the stand-alone device may communicate with the first device and the second device to receive the collected input signal from them.

[0098] Fig.11 A block diagram of an electronic device according to an embodiment of the present application is illustrated.

[0099] like Fig.11 As shown, the electronic device 10 includes one or more processors 11 and a memory 12 .

[0100] The processor 11 may be a central processing unit (CPU) or other forms of processing units having data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device 10 to perform desired functions.

[0101] The memory 12 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, a random access memory (RAM) and / or a cache memory (cache), etc. The non-volatile memory may include, for example, a read-only memory (ROM), a hard disk, a flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 11 may run the program instructions to implement the wireless charging method for the lawn mower of the various embodiments of the present application described above and / or other desired functions. Various contents such as input signals, signal components, noise components, etc. may also be stored in the computer-readable storage medium.

[0102] In one example, the electronic device 10 may further include: an input device 13 and an output device 14, and these components are interconnected via a bus system and / or other forms of connection mechanisms (not shown).

[0103] When the electronic device is a stand-alone device, the input device 13 may be a communication network connector, which is used to receive the collected input signals from the first device and the second device.

[0104] In addition, the input device 13 may also include, for example, a keyboard, a mouse, etc.

[0105] The output device 14 can output various information to the outside, including the determined distance information, direction information, etc. The output device 14 can include, for example, a display, a speaker, a printer, a communication network and a remote output device connected thereto, and the like.

[0106] Of course, to simplify, Fig.11 Only some of the components related to the present application in the electronic device 10 are shown, and components such as a bus, an input / output interface, etc. are omitted. In addition, according to specific application situations, the electronic device 10 may also include any other appropriate components.

[0107] The computer program product may be written in any combination of one or more programming languages ​​to write program codes for performing the operations of the embodiments of the present application, including object-oriented programming languages, such as Java, C++, etc., and conventional procedural programming languages, such as "C" language or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user computing device, as an independent software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0108] The computer readable storage medium can adopt any combination of one or more readable media. The readable medium can be a readable signal medium or a readable storage medium. The readable storage medium can include, for example, but is not limited to, a system, device or device of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0109] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A wireless charging method for a lawn mower, applied to a charging device, wherein the charging device is wirelessly connected to the lawn mower to charge the lawn mower, characterized in that: The wireless charging method comprises: Periodically emitting detection energy within a preset distance range to form an alternating electromagnetic field; the preset distance range is the maximum range of allowable air displacement between the lawn mower and the charging device; receiving a communication connection request sent by the lawn mower; wherein the lawn mower sends the communication connection request after receiving the detection energy in the alternating electromagnetic field, and when the lawn mower enters the preset distance range of the charging device and does not receive the detection energy, the lawn mower enters the preset distance range of other charging devices for charging; Based on the communication connection request, communicating with the lawn mower; receiving charging request information sent by the lawn mower within a preset distance range of the charging device; Based on the charging request information, obtaining a rated charging power of the lawn mower; According to the rated charging power of the lawn mower, adjusting the charging power of the charging device so that the difference between the charging power of the charging device and the rated charging power of the lawn mower is reduced; and When the charging power of the charging device is adjusted to be greater than or equal to a preset power threshold, and the received power received by the lawn mower is less than the rated charging power of the lawn mower, charging is stopped.

2. The wireless charging method according to claim 1, characterized in that: After the communication connection with the lawn mower, the method further comprises: Obtaining a change in the alternating electromagnetic field; and When the change in the alternating electromagnetic field is greater than a preset change threshold, charging is stopped and a foreign object warning signal is issued.

3. The wireless charging method according to claim 1, characterized in that: Also includes: When the charging power of the charging device is adjusted to be less than the power threshold and the received power received by the lawn mower is greater than or equal to the rated charging power of the lawn mower, the charging power of the charging device is maintained to charge the lawn mower.

4. The wireless charging method according to claim 1, characterized in that: The adjusting the charging power of the charging device according to the rated charging power of the lawn mower comprises: According to the rated charging power of the lawn mower, the duty cycle of the charging current of the charging device is adjusted.

5. The wireless charging method according to claim 4, characterized in that: When the charging power of the charging device is adjusted to be greater than or equal to a preset power threshold, and the received power received by the lawn mower is less than the rated charging power of the lawn mower, stopping charging includes: When the duty cycle of the charging current of the charging device is adjusted to a maximum value and the received power of the lawn mower is less than the rated charging power of the lawn mower, charging is stopped.

6. The wireless charging method according to claim 1, characterized in that: After stopping charging, the method further includes: An abnormal warning signal is issued, and / or an adjustment instruction is sent to the lawn mower to adjust the relative position between the lawn mower and the charging device.

7. A wireless charging device for a lawn mower, arranged on a charging device, wherein the charging device is wirelessly connected to the lawn mower to charge the lawn mower, characterized in that: The wireless charging device comprises: Get modules for: Periodically emitting detection energy within a preset distance range to form an alternating electromagnetic field; the preset distance range is the maximum range of allowable air displacement between the lawn mower and the charging device; receiving a communication connection request sent by the lawn mower; wherein the lawn mower sends the communication connection request after receiving the detection energy in the alternating electromagnetic field; Based on the communication connection request, communicating with the lawn mower; receiving charging request information sent by the lawn mower within a preset distance range of the charging device; Based on the charging request information, obtaining a rated charging power of the lawn mower; an adjusting module, configured to adjust the charging power of the charging device according to the rated charging power of the lawn mower, so that the difference between the charging power of the charging device and the rated charging power of the lawn mower is reduced; and The execution module is used to stop charging when the charging power of the charging device is adjusted to be greater than or equal to a preset power threshold and the received power received by the lawn mower is less than the rated charging power of the lawn mower.

8. A wireless charging system for a lawn mower, characterized in that: include: A lawn mower, the lawn mower comprising a charging receiving device; as well as A charging device, the charging device comprising a charging transmitter, the charging transmitter is wirelessly connected to the charging receiver to charge the lawn mower; wherein the charging transmitter is used to execute the wireless charging method for the lawn mower according to any one of claims 1 to 6.

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