Safety protection system for unmanned mower

Abstract

The application discloses a safety protection system of unmanned mower, which comprises a contact type collision sensor assembly, an emergency stop switch and an audible and visual alarm device. When the contact type collision sensor assembly senses external collision force, the control system controls the emergency stop switch to stop and starts the audible and visual alarm device to alarm. The contact type collision sensor assembly comprises a first sensor, a second sensor and a switch contact assembly. The switch contact assembly is used for connecting the first sensor and the second sensor with the control system. When the first sensor does not work, the second sensor is connected with the control system to ensure work. When the second sensor does not work, the first sensor is connected with the control system to ensure work. The application has the beneficial effect that when the first spring is loosened after frequent collision, the first sensor is separated from the control system, and the second sensor continues to work, thereby ensuring sensing accuracy.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of unmanned mowers, in particular to a safety protection system of an unmanned mower. BACKGROUND

[0002] The intelligent unmanned mower is an intelligent mower for large airports. According to the previous market research, the growth of individual grass species in the flight area is obvious, and the grass that is too high may affect the function of the navigation light equipment and communication navigation equipment. At the same time, the lush grass will provide a suitable habitat and abundant insect seed food for birds, affecting the effectiveness of airport aviation bird strike prevention work. It is beneficial to ensure the safety of navigation to timely cut off the grass that exceeds the limit height. The traditional mower is driven by manual or remote control, and the working efficiency is low, and the labor intensity of personnel operation is large. The intelligent unmanned mower needs to be operated under the condition of ensuring the normal operation of the airport site and maintaining the cleanliness of the whole vehicle and the cleanliness of the ground, and improving the operation efficiency.

[0003] The safety protection system of the unmanned mower includes a contact type collision sensor. Since the mower often collides, the collision sensor is often damaged, and the collision sensor cannot work, which causes the mower to not send out an alarm in time and further damage the mower. Therefore, how to effectively prevent the collision sensor from being damaged and the mower from being further damaged becomes a technical problem to be solved by those skilled in the art. SUMMARY

[0004] The purpose of the present application is to provide a safety protection system of an unmanned mower, which can prevent the mower from being further damaged due to the damage of the collision sensor, and further effectively protect the mower.

[0005] To achieve the above purpose, the technical scheme of the present application is

[0006] A safety protection system of an unmanned mower includes a contact type collision sensor assembly, an emergency stop switch and an audible and visual alarm device. When the contact type collision sensor assembly senses an external collision force, the control system controls the emergency stop switch to stop and starts the audible and visual alarm device to alarm. The contact type collision sensor assembly includes a first sensor, a second sensor and a switch contact assembly. The switch contact assembly is used for connecting the first sensor and the second sensor with the control system. When the first sensor does not work, the second sensor is connected with the control system to ensure the work. When the second sensor does not work, the first sensor is connected with the control system to ensure the work.

[0007] Preferably, the switch assembly comprises a rotating shaft, an electric connecting rod, a first spring, a second spring, a first limiting block, a second limiting block, a first fixed block and a second fixed block, the electric connecting rod is rotatably installed on the rotating shaft, the first spring is connected with a first end of the electric connecting rod, the first spring makes the electric connecting rod contact the first sensor to realize the electric connection between the first sensor and the control system; the second spring is connected with a second end of the electric connecting rod, the second spring makes the electric connecting rod contact the second sensor to realize the electric connection between the second sensor and the control system, the first limiting block is located on one side of the electric connecting rod, when the first spring is loose, the first limiting block can limit the rotating position of the electric connecting rod, thereby ensuring that the second sensor does not loosen in contact with the electric connecting rod, the second limiting block is located on one side of the electric connecting rod, when the second spring is loose, the second limiting block can limit the rotating position of the electric connecting rod, thereby ensuring that the first sensor does not loosen in contact with the electric connecting rod; in normal state, the first spring tension is greater than the second spring tension, and the electric connecting rod is in contact with the first sensor.

[0008] Preferably, a first protective cover is arranged on the electric connecting rod, the first protective cover is used for protecting the first sensor, the first protective cover is located between the first spring and the first sensor, when an external force collides, the first spring is damaged first, then the first protective cover is damaged, and then the first sensor is damaged; a second protective cover is arranged on the electric connecting rod, the second protective cover is used for protecting the second sensor, the second protective cover is located between the second spring and the second sensor, when an external force collides, the second spring is damaged first, then the second protective cover is damaged, and then the second sensor is damaged.

[0009] The beneficial effects of the present application are that: in normal state, the first sensor and the second sensor both work, when the first spring is loose after frequent collisions, the first sensor is separated from the control system, and the second sensor continues to work to ensure the sensing accuracy; when the second spring is loose, the second sensor is separated from the control system, and the first sensor continues to work to ensure the sensing accuracy; the first sensor and the second sensor constitute a mutual cooperation double protection system. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a schematic diagram of the present application. EMBODIMENT

[0011] The specific embodiments of the present application will be further described below in combination with the drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present application, and cannot be used to limit the protection scope of the present application.

[0012] The technical solutions of the specific embodiments of the present application are:

[0013] As Figure 1As shown, a safety protection system of unmanned mower comprises a contact collision sensor assembly, an emergency stop switch and an audible and light alarm device, when the contact collision sensor assembly senses external collision force, the control system controls the emergency stop switch to stop and starts the audible and light alarm device to alarm; the contact collision sensor assembly comprises a first sensor, a second sensor and a switch contact assembly, the switch contact assembly is used for connecting the first sensor and the second sensor with the control system, when the first sensor does not work, the second sensor is connected with the control system to ensure work, when the second sensor does not work, the first sensor is connected with the control system to ensure work.

[0014] Preferably, the switch assembly comprises a rotating shaft, an electric connecting rod, a first spring, a second spring, a first limiting block, a second limiting block, a first fixed block and a second fixed block, the electric connecting rod is rotatably installed on the rotating shaft, the first fixed block is connected with the first end of the electric connecting rod through the first spring, the first spring makes the electric connecting rod contact the first sensor to realize the electric connection between the first sensor and the control system; the second fixed block is connected with the second end of the electric connecting rod through the second spring, the second spring makes the electric connecting rod contact the second sensor to realize the electric connection between the second sensor and the control system, the first limiting block is located on one side of the electric connecting rod, when the first spring loosens, the first limiting block can limit the rotating position of the electric connecting rod to ensure that the second sensor does not loosen with the electric connecting rod, the second limiting block is located on one side of the electric connecting rod, when the second spring loosens, the second limiting block can limit the rotating position of the electric connecting rod to ensure that the first sensor does not loosen with the electric connecting rod; in normal state, the pulling force of the first spring is greater than that of the second spring, and the electric connecting rod contacts the first sensor.

[0015] A first protective cover is arranged on the electric connecting rod, the first protective cover is used for protecting the first sensor, the first protective cover is located between the first spring and the first sensor, when external force collision occurs, the first spring is damaged first, then the first protective cover is damaged, and then the first sensor is damaged; a second protective cover is arranged on the electric connecting rod, the second protective cover is used for protecting the second sensor, the second protective cover is located between the second spring and the second sensor, when external force collision occurs, the second spring is damaged first, then the second protective cover is damaged, and then the second sensor is damaged.

[0016] The present application has the following beneficial effects: when the first spring loosens after frequent collision, the first sensor is separated from the control system, the second sensor continues to work to ensure the sensing accuracy; when the second spring loosens, the second sensor is separated from the control system, the first sensor continues to work to ensure the sensing accuracy; the first sensor and the second sensor constitute a mutual cooperation double protection system.

[0017] The above merely describes the preferred embodiments of the present application, and it should be pointed out that, for those skilled in the art, several improvements and refinements can be made without departing from the technical principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. An unmanned lawn mower safety protection system, characterized in that, The application relates to a contact collision sensor assembly, an emergency stop switch and an audible and light alarm device, when the contact collision sensor assembly senses external collision force, the control system controls the emergency stop switch to stop and the audible and light alarm device is started to alarm; the contact collision sensor assembly comprises a first sensor, a second sensor and a switch contact assembly, the switch contact assembly is used for connecting the first sensor and the second sensor with the control system, when the first sensor does not work, the second sensor is connected with the control system to ensure work, when the second sensor does not work, the first sensor is connected with the control system to ensure work; The switch assembly comprises a rotating shaft, an electric connecting rod, a first spring, a second spring, a first limiting block, a second limiting block, a first fixed block and a second fixed block, the electric connecting rod is rotatably arranged on the rotating shaft, the first spring is connected with the first end of the electric connecting rod, the first spring makes the electric connecting rod contact the first sensor to realize electric connection between the first sensor and the control system; the second spring is connected with the second end of the electric connecting rod, the second spring makes the electric connecting rod contact the second sensor to realize electric connection between the second sensor and the control system, the first limiting block is arranged on one side of the electric connecting rod, when the first spring is loosened, the first limiting block can limit the rotating position of the electric connecting rod, thereby ensuring that the second sensor does not loosen with the electric connecting rod, the second limiting block is arranged on one side of the electric connecting rod, when the second spring is loosened, the second limiting block can limit the rotating position of the electric connecting rod, thereby ensuring that the first sensor does not loosen with the electric connecting rod; under normal conditions, the pulling force of the first spring is greater than that of the second spring, and the electric connecting rod contacts the first sensor; The first protection cover is arranged on the electric connecting rod and is used for protecting the first sensor, the first protection cover is arranged between the first spring and the first sensor, when external force impact is encountered, the first spring is damaged first, then the first protection cover is damaged, and finally the first sensor is damaged; the second protection cover is arranged on the electric connecting rod and is used for protecting the second sensor, the second protection cover is arranged between the second spring and the second sensor, when external force impact is encountered, the second spring is damaged first, then the second protection cover is damaged, and finally the second sensor is damaged.

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