LOW-ENERGY MICROCONTROLLER-BASED MEASURING TRANSMITTER FOR VARIABLE RESISTANCE TRANSDUCER Russian patent published in 2012 - IPC G01R27/02 

FIELD: electricity.

SUBSTANCE: low energy microcontroller-based measuring transmitter for variable resistance transducers is comprised of a microcontroller 1, reference resistor 2 (R_o), variable resistance transducer 3 (R_x), resistor 4 (R₁) and resistor 5 (R₂). The resistors 2 and 4 are connected to the digital outputs of microcontroller 1 outputs with their first outputs, and resistors 3 and 5 and connected with the second digital microcontroller 1 output with their first outputs. The second outputs of resistors 2 and 3 and resistors 4 and 5 are coupled respectively with the first and second inputs of analog multiplexer (not shown in dwg), which is built into microcontroller 1. The output of analog multiplexer is connected to the input of analog-digital converter (not shown in dwg) which is built into microcontroller 1. Several lines of microcontroller for each digital output are used as the first and second digital outputs of microcontroller.

EFFECT: improved sensibility of measuring chain and reduced energy consumption.

2 cl, 1 dwg