Alarm method for mower and mower

Abstract

Disclosed in the present application are an alarm method for a mower and a mower. The mower comprises: an electric motor, a pipe, a collection apparatus and a first sensor, wherein the first sensor is placed on the pipe and is close to one side of the collection apparatus. The method comprises: after a mower is started, controlling a transmission module of a first sensor to transmit a sensing signal; detecting whether a receiving module of the first sensor receives the transmitted sensing signal; and when the sensing signal is not detected, sending a first alarm signal. Whether a pipe is blocked is determined by determining the reception of a sensing signal, such that an alarm is raised when a collection apparatus is fully loaded or a transfer pipe is blocked, thus solving the problem of a mower being blocked and stopped due to the full load of a collection apparatus or the blockage of a transfer pipe.

Description

Alarm method for lawn mower and lawn mower Technical Field

[0001] The embodiments of the present invention relate to outdoor gardening equipment, and in particular to an alarm method for a lawn mower and the lawn mower. Background Art

[0002] As people's living needs continue to improve, outdoor gardening equipment such as lawn mowers are widely used. For example, traditional lawn mowers, mainly backpack mowers, portable mowers, and push mowers, have a low degree of automation, low work efficiency, high labor intensity, and are relatively harmful to the human body. For work areas that require year-round maintenance of large lawns (such as golf courses, football fields, courtyard lawns, municipal parks, tourist attractions, farm orchards, and wasteland), riding lawn mowers, with their long battery life, flexible control, and high work efficiency, are well suited to these working conditions, avoiding fatigue and even injury caused by long hours of work.

[0003] Based on their power source, there are currently two main types of riding lawn mowers: gasoline-powered and lithium-ion rechargeable. Compared to gasoline-powered models, lithium-ion rechargeable models offer distinct advantages: all-weather zero emissions, zero fuel consumption, low noise levels, and simplified maintenance (no gasoline, oil, air filter, spark plugs, or fuel storage). Furthermore, gasoline engines, similar to traditional fuel-powered vehicles, have complex mechanical structures and require a differential for drive wheel control. Lithium-ion rechargeable riding lawn mowers, on the other hand, utilize electric motors instead of fuel engines for their drive wheels. These motors can be independently controlled to achieve motion control, including straight driving, reverse driving, cornering, and zero-turn maneuvers. This reduces the vehicle's structural complexity and makes control more flexible.

[0004] Currently, lithium-ion rechargeable riding lawn mowers feature two mowing blades arranged side by side. Cut grass is discharged from the left to right (or vice versa, depending on the layout) through a groove connecting the blades onto the right side of the mower. Grass clippings discharged from the right side are then drawn into the right-hand grass collection box by a fan. Currently, lawn mowers offer two options: external discharge and collection in a grass box. Direct discharge increases the difficulty and cost of cleaning up the clippings later, so using a grass box to collect the cut grass is the trend.

[0005] Although the use of riding lawn mowers with grass boxes has improved and upgraded the functions of direct-discharge lawn mowers, it also brings several problems:

[0006] 1. Grass clippings enter the grass collection box through the grass discharge pipe. If large foreign objects appear during the process or the amount of grass clippings suddenly increases, the pipe may be blocked. If the user fails to discover it in time, the entire pipe may be blocked until the mowing motor is blocked and stops.

[0007] 2. The capacity of the grass collection box is limited. Long-term mowing operations will inevitably fill the grass collection box with grass clippings. However, the user will not know the situation inside the grass collection box. When the grass collection box is full, the grass clippings will continue to fill the entire pipe until the mowing motor is blocked and the machine stops.

[0008] Summary of the Invention

[0009] The purpose of an embodiment of the present invention is to provide an alarm method for a lawn mower, so that the lawn mower can issue an alarm when the collection device is fully loaded or the transmission pipeline is blocked, thereby solving the problem of the lawn mower being blocked and stopped by grass clippings / dust due to a full collection device or a blocked transmission pipeline.

[0010] To address the above technical issues, embodiments of the present invention provide an alarm method for a lawn mower. The lawn mower comprises a motor, a pipe, and a collection device. The lawn mower also comprises a first sensor, positioned on the pipe near a side of the collection device, for detecting the status of the pipe and / or the collection device. The alarm method comprises: after the lawn mower is started, controlling a transmitting module of the first sensor to transmit a sensing signal; detecting whether a receiving module of the first sensor receives the transmitted sensing signal; and, if the sensing signal is not detected, issuing a first alarm signal. The unobstructed condition of the pipe is determined by determining whether the receiving module of the sensor detects the sensing signal emitted by the transmitting module.

[0011] An embodiment of the present invention also provides a lawn mower, comprising: a motor, a pipe and a collection device, and also comprising: a first sensor and a processor; the first sensor is communicatively connected to the processor; the first sensor is placed on the grass discharge pipe and close to one side of the collection device; the processor is used to execute the alarm method of the lawn mower.

[0012] In an embodiment of the present invention, since the sensor is placed on the pipe and close to one side of the collection device, when grass clippings / dust are blocked in the pipe, the sensor's receiving module cannot detect the sensing signal emitted by the transmitting module, so that the lawn mower can issue an alarm when the transmission pipe is blocked, thereby solving the problem of the lawn mower being blocked and stopped by grass clippings / dust due to the blockage of the transmission pipe.

[0013] In addition, the connection line between the transmitting module and the receiving module of the first sensor is perpendicular to the wind direction of the hair dryer of the lawn mower, and the connection line intersects with the center of the cross section of the pipe, thereby improving the accuracy of the sensor in detecting the unclogged condition of the pipe.

[0014] In addition, the lawn mower further includes: a detector provided on the collection device, the detector being used to detect whether the collection device is fully loaded, and the method comprising: after the lawn mower is started, starting the detector to detect whether the collection device is fully loaded; when it is detected that the collection device is fully loaded, issuing a second alarm signal, so that the lawn mower can issue an alarm when the collection device is fully loaded, thereby solving the problem of the lawn mower being blocked and stopped by grass clippings / dust, etc. due to a full collection device.

[0015] In addition, when the detector includes a pressure sensor, the pressure sensor is installed at the bottom of the collecting device; when the detector includes a second infrared pair tube, the second infrared pair tube is installed on the side wall of the collecting device, and the vertical distance between the second infrared pair tube and the bottom of the collecting device is greater than four-fifths of the height of the collecting device. This facilitates real-time monitoring of the amount of grass / dust, etc. in the collecting device, and can quickly issue a second alarm signal when the amount of grass / dust accumulates to a threshold value.

[0016] In addition, the first alarm signal is one of the buzzer alarm signal and the indicator light alarm signal, and the second alarm signal is the other of the buzzer alarm signal and the indicator light alarm signal. The user can judge the operating conditions of the grass collection box and the grass discharge pipe respectively according to different types of alarm signals.

[0017] An embodiment of the present invention relates to a lawn mower, and discloses an alarm method for a lawn mower and a lawn mower. The lawn mower includes: a motor, a pipe, a collection device, and a first sensor. The first sensor is placed on the pipe and close to one side of the collection device. The method includes: after the lawn mower is started, controlling the transmitting module of the first sensor to transmit a sensing signal; detecting whether the receiving module of the first sensor receives the transmitted sensing signal; and issuing a first alarm signal if the sensing signal is not detected. By judging whether the pipeline is unobstructed based on the reception of the sensing signal, an alarm is issued when the collection device is fully loaded or the transmission pipeline is blocked, thereby solving the problem of the lawn mower being blocked and stopped by grass clippings / dust / particulate matter due to a full collection device or a blocked transmission pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0019] FIG1 is a schematic structural diagram of a lawn mower provided in an embodiment of the present application;

[0020] FIG2 is a schematic diagram of infrared tube detection provided by the first embodiment of the present application;

[0021] FIG3 is a control flow chart provided in the first embodiment of the present application;

[0022] FIG4 is a schematic diagram of the installation position of the infrared pair tube provided in the first embodiment of the present application;

[0023] FIG5 is a cross-sectional top view of the installation position of the infrared pair tube provided in the first embodiment of the present application;

[0024] FIG6 is an electronic schematic diagram of a buzzer provided in the first and second embodiments of the present application;

[0025] FIG7 is a schematic diagram of an indicator light provided in the first and second embodiments of the present application;

[0026] FIG8 is a schematic structural diagram of a lawn mower provided in the second and third embodiments of the present application;

[0027] FIG9 is a front view of the installation position of the infrared pair tube of the grass collecting box provided by the second embodiment of the present application;

[0028] FIG10 is a top view of the installation position of the infrared pair tube of the grass collecting box provided in the second embodiment of the present application;

[0029] FIG11 is a force diagram of a pressure sensor according to a second embodiment of the present application;

[0030] FIG12 is an electronic schematic diagram of a pressure sensor provided in a second embodiment of the present application;

[0031] FIG13 is a diagram showing the correspondence between the buzzer duty cycle and the AD value according to the second embodiment of the present application. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be understood by those skilled in the art that in the embodiments of the present invention, many technical details are provided to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present application can be implemented. The division of the following embodiments is for convenience of description and should not constitute any limitation on the specific implementation of the present invention. The various embodiments can be combined with each other and referenced to each other under the premise that there is no contradiction.

[0033] A first embodiment of the present invention relates to an alarm method for a lawn mower, wherein the lawn mower comprises: a motor, a pipe, a collection device, and a first sensor, the first sensor being placed on the pipe near one side of the collection device. The method comprises: after the lawn mower is started, controlling the transmitting module of the first sensor to transmit a sensing signal; detecting whether the receiving module of the first sensor receives the transmitted sensing signal; and if the sensing signal is not detected, issuing a first alarm signal. Taking a riding lawn mower as an example, the lawn mower comprises: a mowing motor, a grass discharge pipe, and a grass collection box. The lawn mower further comprises: a first sensor, comprising a transmitting module and a receiving module. Preferably, the first sensor is a first infrared pair tube, which is placed about one-third of the grass discharge pipe and near one side of the grass collection box. The method comprises: after the lawn mower is started, controlling the transmitting module of the first infrared pair tube to transmit an infrared signal; detecting whether the receiving module of the first infrared pair tube receives the transmitted infrared signal; and if the infrared signal is not detected, issuing a first alarm signal. When the pipe is clogged, the first infrared pair of tubes can promptly detect it and issue an alarm. When the grass box is full, because the grass box and pipe are connected, grass debris will accumulate at the connection between the pipe and the box. Over time, this accumulation will block the infrared pair of tubes' detection range, thus also enabling a timely alarm. The following describes in detail the implementation of an alarm method for a lawn mower according to an embodiment of the present invention. The following content is provided for ease of understanding only and is not essential for implementing this solution.

[0034] As shown in Figure 1, the lawn mower includes: a mowing motor 1, a grass discharge pipe 2, a grass collection box 3 and a first infrared pair tube 4. The first infrared pair tube 4 is placed at one-third of the grass discharge pipe 2 and close to one side of the grass collection box 3.

[0035] Specifically, an infrared pair tube module is installed in the pipeline, with an infrared transmitting tube module on one side and an infrared receiving tube module on the other side (the positions are interchangeable). It should be noted that grass clippings will enter the grass box from one side of the pipeline, about a quarter of the left side of the channel (the present invention takes this as an example, and the actual direction of the pipeline and the position of the hair dryer are determined by the arrangement of the mechanism), so the infrared pair tubes should be placed on the front and back sides. When the position of the front infrared transmitting tube is aligned with the rear infrared receiving tube, the rear infrared receiving tube just receives the infrared signal sent by the front infrared transmitting tube, which indicates that the pipeline is unobstructed. Figure 2 is a schematic diagram of infrared pair tube detection, and Figure 3 is a control flow chart.

[0036] In some embodiments, a line connecting the transmitting module and the receiving module of the first infrared pair tube is perpendicular to the wind direction of the blower of the lawn mower, and the line intersects with the center of the cross section of the grass discharge pipe.

[0037] Specifically, as shown in Figures 4 and 5, since grass clippings will be transmitted to the grass box along the wind direction of the hair dryer, in order to prevent false triggering caused by the flow of grass clippings, the installation position of the infrared pair tube needs to avoid the path of grass clippings flow, that is, the connection between the infrared pair tube transmitting module and the receiving module needs to be perpendicular to the wind direction of the hair dryer.

[0038] The infrared tube transmitting module is connected to the power supply, and the receiving module is connected to the I / O port of the microcontroller (this I / O port is set to input mode). The transmitting module always sends infrared signals to the receiving module. When the grass box is not fully loaded and the pipe is not blocked, the receiving module can always receive the infrared signal emitted by the transmitting module, and the I / O is high level; when the grass box is fully loaded or the pipe is blocked, the receiving module cannot receive the infrared signal, and the I / O port is low level.

[0039] In some embodiments, issuing the first alarm signal includes: controlling a buzzer to emit an alarm sound, and / or lighting an indicator light.

[0040] Specifically, Figure 6 shows the electronic schematic of the buzzer. One end of the buzzer is connected to a power supply, and the other end is connected to the collector of transistor Q1. The emitter of the transistor is grounded, and the base is connected to an I / O port of the processor via resistor R5. The buzzer alarm works as follows: when the hay bin is full, the buzzer sounds; when it is not full, the buzzer does not sound. This solution simply connects the buzzer interface to an I / O port of the processor and configures this I / O port in output mode. When the processor receives a full-load signal, the I / O port outputs a high level; otherwise, it outputs a low level.

[0041] Figure 7 shows the electronic schematic of the alarm indicator light. In this embodiment, regardless of the number of alarm indicators used, each indicator light is connected in series with a resistor and then connected to an I / O port of the processor. The I / O port is set to output mode. When the grass box needs to light up, the I / O port outputs a high level; otherwise, the I / O port outputs a low level.

[0042] The alarm modes of the buzzer and indicator light in this embodiment are shown in Table 1. There are the following

[0043] Table 1

[0044] Compared to the related art, this embodiment places the first infrared pair of tubes about one-third of the way along the pipe (near the grass collection box). This prevents the lead wire from reaching the grass collection box, thus avoiding safety issues caused by excessively long lead wires. It also provides simultaneous alarms for both a full grass collection box and a blocked pipe. The above is a preferred embodiment. When the sensor or infrared pair of tubes is wireless, it is not affected by its own lead wires. As long as the sensor / infrared pair of tubes is installed in a location that can simultaneously detect a blocked pipe and a full grass collection box, the specific location can be determined as long as these conditions are met. When the sensor or infrared pair of tubes has lead wires, the sensor / infrared pair of tubes can be installed in a location that not only detects a blocked pipe and a full grass collection box, but also ensures that the lead wire does not reach the grass collection box. Any location that meets these conditions is acceptable. Regardless of whether the grass collection box is full or the grass collection pipe is blocked, the user will stop and address the issue before continuing. Therefore, after the lawn mower issues an alarm, the user can stop and check whether the grass collection pipe is blocked or the grass collection box is full, and take appropriate measures. Therefore, this embodiment does not increase the workload of users and is simple and feasible.

[0045] A second embodiment of the present invention relates to a lawn mower alarm method, which can be applied to a riding lawn mower. Based on the first embodiment, the lawn mower further includes: a grass box detector disposed on the grass box, the grass box detector being configured to detect whether the grass box is full. The method comprises: after the lawn mower is started, activating the grass box detector to detect whether the grass box is full; and upon detecting that the grass box is full, issuing a second alarm signal. When the amount of grass in the grass box reaches a certain level, the accumulated grass clippings weight or height will exceed a preset threshold of the grass box detector, thereby enabling a timely alarm.

[0046] As shown in FIG8 , the lawn mower includes: a lawn mowing motor 1 , a grass discharge pipe 2 , a grass collection box 3 , a first infrared pair tube 4 and a grass collection box detector 5 .

[0047] In some embodiments, the grass box detector includes: a pressure sensor or a second infrared tube.

[0048] In some embodiments, the pressure sensor includes any one of the following: a piezoresistive pressure sensor, a sapphire pressure sensor, a piezoelectric pressure sensor, and a capacitive pressure sensor.

[0049] In some embodiments, when the grass collection box detector includes a pressure sensor, the pressure sensor is installed at the bottom of the grass collection box; when the grass collection box detector includes a second infrared pair tube, the second infrared pair tube is installed on the side wall of the grass collection box, and the vertical distance between the second infrared pair tube and the bottom of the grass collection box is greater than four-fifths of the height of the grass collection box.

[0050] Specifically, when the grass collection box detector includes a second infrared pair of tubes, because the pipe inlet is on the left side of the grass collection box, in order to prevent false triggering, the second infrared pair of tubes is installed on the right side of the grass collection box, as shown in Figures 9 and 10.

[0051] The second infrared pair transmitter module is connected to a power source, and the second infrared pair receiver module is connected to the microcontroller's I / O port P1 (this I / O port is set to input mode). The transmitter module continuously sends infrared signals to the receiver module. When the hay bin is not full, the receiver module can always receive the infrared signal from the transmitter module, and the I / O is high. When the hay bin is full, the receiver module cannot receive the infrared signal, and the I / O port is low. The processor determines whether the hay bin is full based on the input signal from I / O port P1: a high level indicates that it is not full, and a low level indicates that it is full.

[0052] When a grass bin detector includes a pressure sensor, such as a strain gauge pressure sensor, deformation of the elastic element causes a corresponding deformation of the strain gauge, which then changes the resistance value. This resistance change leads to a change in the resistance voltage. Figures 11 and 12 show the force diagram and electronic schematic of the pressure sensor.

[0053] It can be calculated from Figure 12 that when the AD value detected by the processor is x, the voltage V2 of the resistor RT2 of the resistance pressure sensor can be obtained:

[0054] Then the resistance value RT2 is obtained:

[0055] Based on the resistance value of RT2, you can consult its datasheet to determine the weight of the grass box. However, in general, we first determine the weight of the fully loaded grass box, and then use the formula to reverse-calculate the AD value of the fully loaded condition. If the detected AD value is less than the fully loaded AD value, the grass box is fully loaded; if the detected AD value is greater than the fully loaded AD value, the grass box is not fully loaded. (Resistors generally have a negative characteristic, meaning that the greater the pressure, the smaller the resistance.)

[0056] In some embodiments, the first alarm signal is one of a buzzer alarm signal and an indicator light alarm signal, and the second alarm signal is the other of the buzzer alarm signal and the indicator light alarm signal.

[0057] Specifically, the alarm device has two modes: buzzer and alarm warning light: control the buzzer to sound an alarm or light up the indicator light.

[0058] In this embodiment, regardless of the number of alarm indicators used, each indicator is connected to an I / O port on the processor. The I / O port is set to output mode. When the hay box needs to light up, the I / O port outputs a high level; otherwise, it outputs a low level. The indicator light schematic is shown in Figure 7.

[0059] There are two ways for the buzzer to alarm:

[0060] 1. When the grass box is fully loaded, the buzzer sounds, and when the grass box is not fully loaded, the buzzer does not work: This solution only requires connecting the buzzer interface to the I / O port of the MCU, configuring this I / O port to output mode, and when the MCU receives the full load information, the I / O port outputs a high level, otherwise, the I / O port outputs a low level.

[0061] 2. When the weight of the straw box reaches a specified value, an alarm sounds, and the decibel level increases with weight. At this point, the I / O port can be multiplexed into PWM output mode. The PWM duty cycle is configured based on the AD value detected by the AD port: when the AD value equals the specified value A, the PWM output duty cycle is zero. When the AD value is less than the specified value A, the PWM output duty cycle is zero. When the AD value equals the specified value B, the PWM output duty cycle is 100%. The duty cycle and AD value are linearly related. The buzzer electronic schematic and PWM duty cycle corresponding diagram are shown in Figure 6 and Figure 13, respectively.

[0062] In this embodiment, the alarm device has two modes: buzzer and alarm warning light. Different combinations can be selected according to actual conditions. The pressure sensor alarm mode can also be diversified according to actual conditions and customer requirements. The combination modes are shown in Table 2, which are as follows:

[0063] Table 2

[0064] If the alarm scheme of sequence number 1 is adopted, when the pressure sensor installed in the grass collection box detects that the grass collection box is full, the control buzzer will alarm, and the alarm decibel will be fixed; when the first infrared pair tube installed in the grass discharge pipe detects that the pipe is unobstructed, the control indicator light will light up green, and when the pipe is detected to be blocked, the control indicator light will light up red.

[0065] If the alarm scheme of sequence number 2 is adopted, when the pressure sensor installed in the grass collection box detects that the grass collection box is about to be full, the control buzzer will alarm, and the alarm decibel will increase with the increase of weight; when the first infrared pair tube installed in the grass discharge pipe detects that the pipe is unobstructed, the control indicator light will light up green, and when the pipe is detected to be blocked, the control indicator light will light up red.

[0066] If the alarm scheme of sequence number 3 is adopted, when the pressure sensor installed in the grass collection box detects that the grass collection box is not fully loaded, the control indicator light will light up green, and when the grass collection box is fully loaded, the control indicator light will light up red; when the first infrared pair tube installed in the grass discharge pipe detects that the pipe is blocked, the buzzer sounds and the alarm decibel is fixed.

[0067] If the alarm scheme of sequence number 4 is adopted, when the pressure sensor installed in the grass collection box detects that the grass collection box has not reached the alarm value, the control indicator light will light up green, when it detects that the weight of the grass collection box has reached the alarm value, the control indicator light will light up yellow, when it detects that the weight of the grass collection box has reached the peak value, the control indicator light will light up red; when the first infrared pair tube installed in the grass discharge pipe detects that the pipe is blocked, the buzzer sounds and the alarm decibel is fixed.

[0068] If the alarm scheme of sequence number 5 is adopted, when the pressure sensor arranged in the grass collection box and the first infrared pair of tubes arranged in the grass discharge pipe detect that the grass collection box is not full and the pipe is unobstructed, the control indicator light will light up green; when the pressure sensor arranged in the grass collection box detects that the grass collection box is fully loaded, the control indicator light will light up yellow; when the first infrared pair of tubes arranged in the grass discharge pipe detects that the pipe is blocked, the control indicator light will light up red.

[0069] In addition to using pressure sensors, the grass box can also use infrared tubes to detect whether it is fully loaded. The alarm device has two modes: buzzer and alarm indicator light. Different alarm combinations can be made according to actual conditions. The alarm combination methods are shown in Table 3, which are as follows:

[0070] Table 3

[0071] If the alarm scheme of sequence number 6 is adopted, when the second infrared pair of tubes set in the grass collection box detects that the grass collection box is full, the control buzzer alarms, and the alarm decibel is fixed; when the first infrared pair of tubes set in the grass discharge pipe detects that the pipe is unobstructed, the control indicator light turns green, and when the pipe is detected to be blocked, the control indicator light turns red.

[0072] If the alarm scheme of sequence number 7 is adopted, when the second infrared pair of tubes set in the grass collection box detects that the grass collection box is not fully loaded, the control indicator light will light up green, and when the grass collection box is fully loaded, the control indicator light will light up red; when the first infrared pair of tubes set in the grass discharge pipe detects that the pipe is blocked, the control buzzer will alarm, and the alarm decibel is fixed.

[0073] If the alarm scheme of sequence number 8 is adopted, when the second infrared pair tube set in the grass collection box and the first infrared pair tube set in the grass discharge pipe detect that the grass collection box is not full and the pipe is unobstructed, the control indicator light will light up green; when the second infrared pair tube set in the grass collection box detects that the grass collection box is fully loaded, the control indicator light will light up yellow; when the first infrared pair tube set in the grass discharge pipe detects that the pipe is blocked, the control indicator light will light up red.

[0074] Compared with the related art, this embodiment installs a grass collection box detection device in the grass collection box on the basis of installing an infrared pair of tubes on the grass discharge pipe of the lawn mower, so that the lawn mower can send out an alarm signal only when the grass collection box is full, and distinguishes between the alarm signals when the grass collection box is full and when the grass discharge pipe is blocked, so that the user can quickly judge the operating status of the lawn mower. While further avoiding the damage to the lawn mower caused by a full grass collection box and a blocked pipe, the practicality of the lawn mower is also improved.

[0075] A third embodiment of the present invention relates to a lawn mower, as shown in FIG1 , comprising: a mowing motor 1, a grass discharge pipe 2, and a grass collection box 3. The mower further comprises: a first infrared pair tube 4 and a processor; the first infrared pair tube 4 is communicatively connected to the processor; the first infrared pair tube 1 is positioned about one-third of the way through the grass discharge pipe 2 and close to one side of the grass collection box 3; and the processor is configured to execute the aforementioned lawn mower alarm method. When the pipe is clogged, the first infrared pair tube can promptly detect it and issue an alarm; when the grass collection box is full, because the grass collection box and the pipe are connected, grass clippings will accumulate at the connection between the pipe and the grass collection box. Over time, this accumulation will block the infrared pair tube's detection range, thus enabling a timely alarm.

[0076] In some embodiments, as shown in FIG8 , the lawn mower further includes a grass collection box detector 5 disposed in the grass collection box, the grass collection box detector being configured to detect whether the grass collection box is full. The processor is further configured to execute the aforementioned lawn mower alarm method. When the grass collection box reaches a certain level, the accumulated grass clippings weight or height exceeds a preset threshold of the grass collection box detector, thereby providing a timely alarm.

[0077] It is not difficult to find that this embodiment is an apparatus embodiment corresponding to the above-mentioned method embodiment, and this embodiment can be implemented in conjunction with the above-mentioned method embodiment. The relevant technical details mentioned in the above-mentioned method embodiment are still valid in this embodiment, and to reduce repetition, they are not repeated here. Accordingly, the relevant technical details mentioned in this embodiment can also be applied to the above-mentioned method embodiment.

[0078] Those skilled in the art will appreciate that the above embodiments are specific embodiments for implementing the present invention, and that in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. An alarm method for a lawn mower, the lawn mower comprising: The mower comprises a motor, a pipe and a collecting device, wherein the mower further comprises: a first sensor, the first sensor being placed on the pipe and close to one side of the collecting device, for detecting the state of the pipe and / or the state of the collecting device, and the alarm method comprising: After the lawn mower is started, controlling the transmitting module of the first sensor to transmit a sensing signal; Detecting whether the receiving module of the first sensor receives the transmitted sensing signal; In the case that the sensing signal is not detected, a first alarm signal is issued.

2. The lawn mower alarm method according to claim 1, characterized in that: A connecting line between the transmitting module and the receiving module of the first sensor is perpendicular to the wind direction in the pipeline of the lawn mower, and the connecting line intersects with the center of a circle of a cross section of the pipeline.

3. The lawn mower alarm method according to claim 1, characterized in that: The sending of the first alarm signal comprises: Control the buzzer to sound an alarm and / or light up the indicator light.

4. The lawn mower alarm method according to claim 1, characterized in that: The lawn mower further comprises: a detector disposed on the collecting device, the detector being used to detect whether the collecting device is fully loaded, and the method comprising: After the lawn mower is started, the detector is started to detect whether the collecting device is fully loaded; When it is detected that the collecting device is fully loaded, a second alarm signal is issued.

5. The lawn mower alarm method according to claim 4, characterized in that: The detector comprises: a pressure sensor and / or a second infrared pair tube.

6. The lawn mower alarm method according to claim 5, characterized in that: The pressure sensor includes any one of the following: a piezoresistive pressure sensor, a sapphire pressure sensor, a piezoelectric pressure sensor, and a capacitive pressure sensor.

7. The lawn mower alarm method according to claim 5, characterized in that: When the detector includes a pressure sensor, the pressure sensor is installed at the bottom of the collecting device; when the detector includes a second infrared pair tube, the second infrared pair tube is installed on the side wall of the collecting device, and the vertical distance between the second infrared pair tube and the bottom of the collecting device is greater than four-fifths of the height of the collecting device.

8. The lawn mower alarm method according to any one of claims 4 to 7, characterized in that: The first alarm signal is one of a buzzer alarm signal and an indicator light alarm signal, and the second alarm signal is the other of the buzzer alarm signal and the indicator light alarm signal.

9. The lawn mower alarm method according to claim 1, characterized in that: The first sensor is a first infrared pair tube, which is placed at one third of the pipeline and close to one side of the collecting device.

10. A lawn mower comprising: The motor, pipeline and collection device are characterized by further comprising: a first sensor and a processor; the first sensor is communicatively connected with the processor; The first sensor is placed on the grass discharge pipe and close to one side of the collecting device; The processor is used to execute the alarm method for a lawn mower as claimed in any one of claims 1 to 9.

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