Method for measuring concentration of plant nutrients e.g. calcium, in agricultural land and transmitting measured values to receiver device, involves effectuating power supply of e.g. measuring bridge during activation phase

摘要

The method involves digitizing electrical parameters outputted by sensors, by an analog-to-digital converter during an activation phase of a radio frequency identification-integrated circuit (RFID-IC). The digitized parameters are transmitted to a receiver device as a bit stream in a contact-free manner. Electronic components e.g. measuring bridge, of a measuring device are controlled by a control and process logic circuit during the activation phase. The power supply of the electronic components is effectuated through the RFID-IC during the activation phase. An independent claim is also included for a device for measuring concentration of plant nutrients in an agricultural land and for contactlessly transmitting measured values to a receiver device.