250 kg. The empty weight of the Xaver is only 150 kg. The 48-volt lithium-ion battery is available in a 1.8 or 2.6 kWh version. The power per wheel is 400 watts. Each battery charge is enough to empty one seed hopper and return to the charging station. The battery can be fully charged in 40 minutes.
OptiVizer algorithm The purpose of the Xaver is mainly to conduct research into intelligent systems that can later be applied to larger Fendt machines. One of these systems is the OptiVizer algorithm. This algorithm optimises the path planning of the Xaver and advises on the correct route so that it does not collide with another robot. Each robot gets its own space on the plot. After de- termining the correct path, the robots take turns going through the entrance of the field and starting operations on the assigned part of the field. If a robot breaks down, another robot automatically takes over and finishes the job. The Xaver sends data according to the MQTT protocol via a SIM card to the Xaver page in the Fendt One application, and can therefore be tracked in real time from any location. MQTT is an Oasis standard messaging protocol for the Internet of Things (IoT). It is designed as an extremely lightweight publish/subscribe messaging transport that is ideal for connect- ing remote devices with a small code footprint and minimal network bandwidth.
Autonomous crop protection The focus is now mainly on solving malfunc- tions in the system and developing a robot that can both observe and process informa- tion. How fast the development of the Xaver will be mainly depends on regulations. If more pesticides are banned and labour costs in- crease, the demand for autonomous crop pro- tection methods will increase. In addition, a ro- bot operates more precisely and makes fewer mistakes. The newly developed Fendt Xaver has no price tag. This robot will not be sold on the market in this form. The fact that the robot is equipped with a seeding unit does not mean that it has been specifically developed for seeding. Fendt’s project leader, Johannus Utz, rather expects that the Xaver will be used for hoeing or spot
The individual grain seeds are sown with an accuracy of a few centimetres by an electrically driven system.
The 48V battery sits in front of the steered rear wheel. One battery charge is enough to empty the seed tank. Recharging takes 40 minutes.
spray crop protection, because sowing will probably not be cheaper than the current rate of € 45/ha.
The Xaver sends data according to the MQTT protocol via a SIM card to the Xaver page in the Fendt One application and can therefore be tracked in real time from any location.
▶ FUTURE FARMING | 20 November 2020 45
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