Autonomous Mower State Reporting With Adaptive Transmission Intervals
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Solution Overview
Problem
Existing autonomous work devices face challenges in continuously monitoring their status without excessively increasing communication volume and power consumption, particularly when operating autonomously.
Innovation Solution
An autonomous work device with a control unit that adjusts transmission intervals for state information based on operating state and position, using multiple batteries to manage power efficiently and extend communication when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the work device transmits position information and operating condition constantly, then the user can monitor the status of the work device continuously, but the volume of communication and power consumption of the battery become unacceptably great
Solution Approach 1:
The transmission time interval is dynamically adjusted based on the operating state of the work device. When the device is operating normally, a longer time interval is used to reduce communication frequency. When an abnormal state is detected, the time interval is shortened to increase monitoring frequency, thus balancing information availability with power consumption.
Solution Approach 2:
The system changes the transmission parameter (time interval) according to the operating conditions. By varying the transmission time interval between a first time interval (for abnormal states) and a second time interval (for normal states), the system optimizes the balance between monitoring quality and power consumption.
2Reliability
If the transmission time interval is set to a short interval for abnormal states, then the operator can be notified without delay, but the power consumption increases
Solution Approach 1:
The system dynamically switches between short and long transmission intervals based on the detected operating state. The short first time interval is used only when abnormal states are detected, ensuring timely notification. The long second time interval is used during normal operation to conserve power, achieving reliability only when necessary.
Solution Approach 2:
The system employs periodic transmission with varying periods. The transmission time interval is set to a first periodic interval during abnormal states for immediate notification, and switched to a second periodic interval during normal states to reduce power consumption, creating an adaptive periodic communication pattern.
3Duration of action of moving object
If the transmission time interval is set to a long interval to minimize power consumption, then the battery life is extended, but the operator may not be notified timely of abnormal states
Solution Approach 1:
The transmission interval is made dynamic rather than fixed. The system automatically extends the time interval to conserve battery life during normal operation, while detecting abnormal states and shortening the interval to ensure timely notification, thus resolving the contradiction between battery life and notification timeliness.
Solution Approach 2:
The system uses feedback from the state detecting unit to adjust the transmission time interval. When abnormal states are detected, the feedback triggers a switch to a shorter transmission interval, ensuring timely notification while maintaining long intervals during normal states to extend battery life.
4Loss of information
If the work device transmits state information frequently, then the user can have accurate real-time information, but the communication volume increases
Solution Approach 1:
The transmission frequency is dynamically adjusted based on the operating state. During normal operation, a longer time interval reduces communication volume. During abnormal states, a shorter time interval increases information accuracy and transmission frequency, optimizing the balance between information quality and communication quantity.
Solution Approach 2:
The system changes the transmission parameter (time interval) according to the operating conditions. By varying the time interval between first and second intervals based on the detected state, the system reduces communication volume during normal states while maintaining information accuracy during abnormal states.
Data Source
AI summary
An autonomous lawnmower (1) including a work unit (12), a travel unit (11), a first control unit (20), a state detecting unit (21), and a communication device (30) wherein the first control unit is configured to transmit state information regarding the operating state via the communication device at a prescribed transmission time interval, the prescribed transmission time interval being varied between a first time interval, and a second time interval which is longer than the first time interval based on the operating state.