XV7011BB can provide a new solution for the navigation system of intelligent lawn mowers

May 29,2024
98 VIEWS

As an important tool for modern home and commercial lawn maintenance, intelligent lawn mowers have precise positioning and navigation systems that are crucial for improving machine efficiency and ensuring safe operation. In the development process of intelligent lawn mowers, positioning and navigation technology has always been a key innovation point.

Although traditional lawn mowers based on RTK (Real time Dynamic Differential Positioning) technology perform well in open areas, their performance is limited by GPS signal occlusion and interference in enclosed or semi enclosed spaces such as home gardens, resulting in inaccurate positioning, position drift, and even frequent signal loss. In addition, RTK systems generally consist of three parts: reference stations, data links, and mobile stations. The complexity of the system, high cost, and high threshold for maintenance and calibration data also limit the popularity of RTK system intelligent lawn mowers.

In response to these challenges, the EPSON single axis gyroscope XV7011BB can provide a new solution for the navigation system of intelligent lawn mowers. This product supports SPI/I2C output interface, 16/24 bit angular velocity output: working temperature range -20 ° C to+80 ° C (option: -40 ° C to+85 ° C), has excellent zero bias stability, built-in temperature sensor and optional digital filter, further ensuring stable signal output; The working voltage range is between 2.7~3.6V, providing SPI/I2C output interface, and the packaging size is only 5mm * 3.2mm * 1.3mm, making it convenient for control system integration.

Compared to traditional RTK systems, the XV7011BB single axis gyroscope exhibits higher stability and accuracy in enclosed or semi enclosed spaces. Its+100 "/s measurement range can meet the various angular velocity changes that the lawn mower may encounter under normal working conditions. At a 16 bit resolution, it can detect a minimum angular velocity change of 0.00305 °/s, and at a 24 bit resolution, it is even reduced to 0.0000119 °/s, ensuring extremely high measurement accuracy. This means that even in environments with lush trees or walls, the XV7011BB can provide stable angular velocity data, ensuring the lawn mower's navigation system continues to work.

In addition, in the application of lawn mowers, the control system can calculate the actual posture and motion trend of the machine through real-time analysis of diagonal velocity data. This includes detecting rotation, roll, turning, or other non-linear movements. Combined with data from other sensors such as ultrasound, infrared, or cameras, the control system of the lawn mower can accurately adjust direction and speed to avoid collisions and continue cutting along the predetermined path, while also providing necessary data support for obstacle avoidance systems.

Compared to RTK systems that require continuous reception and processing of complex GPS signals, which typically have higher power consumption (operating current consumption is around a few hundred milliamps), the low-power characteristic of the single axis gyroscope XV7011BB is a significant advantage for battery powered lawn mowers. The XV7011BB chip, due to its independence from external signals, typically consumes a current of 0.9mA in non communication states, with a standby current of only 160 μ A and a sleep current as low as 3 μ A. In terms of power consumption and current consumption, The XV7011BB single axis gyroscope is significantly superior to the RTK system positioning module. This helps to extend the working time of the lawn mower, reduce charging frequency, and improve user convenience.

0.003 (°/s)/Hz at 10Hz with low noise characteristics, reducing operational misjudgment

The low noise characteristic is an important indicator of gyroscope performance, and noise can cause errors between the output signal of the gyroscope and the actual angular velocity, thereby reducing measurement accuracy.

For consumer and industrial grade MEMS gyroscopes, the sound level is typically within the following range:

Consumer grade gyroscopes: Noise levels may range from 0.01 (°/s) NHz to 0.1 (°/s)/Hz, and these gyroscopes are commonly used in game controllers, smartphones, and other low-cost applications.

Industrial grade gyroscopes: The noise level may be below 0.01 (°/s) NHz, and these gyroscopes are suitable for industries and applications that require higher precision.

High precision gyroscope: For high-precision applications such as sexual navigation systems, the sound level may be even lower, and can even reach

0.001 (°/s)/VHz or lower.

The noise parameter of the XV7011BB single axis gyroscope is 0.003 (°/s)/Hz at 10Hz, which is relatively low in industrial grade and high-precision applications. This means that the angular velocity signal output by the XV7011BB single axis gyroscope varies within the range of 0.003 °/s at this frequency, ensuring that the output signal of the gyroscope is closer to the actual angular velocity change, reducing misjudgments caused by sound, and improving the accuracy of the obstacle avoidance system.