TRANSFORMER OF RESISTIVE SENSORS' CHANGING RESISTANCE INTO ELECTRIC SIGNAL Russian patent published in 2007 - IPC G01R27/02 

FIELD: the invention refers to measuring technique.

SUBSTANCE: the essence is that the input of a programmable switchboard of potential lines is switched to a resistive sensor. The driving point of the programmable switchboard of potential lines is switched to the input of a control device and its output - to the input of an instrumental amplifier whose supporting input is connected with output contact of the first double-pole switch whose one input is connected with a common bus-bar and the second input - with the output of a programmable divisor. The driving contact of the first double-pole switch is connected with the second input of the control device, and the output of the instrumental amplifier is connected with the input of the amplifier whose output is connected with the input of an analogue-digital transformer and its output - with the input of a recorder. The current source has a source of supporting voltage whose output is connected with the input of a programmable voltage modulator and with a non inverting input of an operational amplifier. The inverting input of the operational amplifier is connected with a nominal resistor and in-series connected with the output contact of the second double-pole switch and the first input of a block of double-pole switches. The second end of the nominal resistor is connected with a common bus. The output of the operational amplifier is connected with the output of the second double-pole switch. The second input of the second double-pole switch is connected with the second input of the block of double-pole switches. The driving point of the second double-pole switch is connected with the third input of the control device. The driving point of the block of the double-pole switches is connected with the fourth input of the control device. The first and the second outputs of the block of the double-pole switchers are connected with current lines. The input of the programmable divisor is connected with the output of the programmable voltage modulator whose driving point is connected with the fifth input of the control device. The driving point of the programmable divisor is connected with the sixth input of the control device.

EFFECT: the invention increases speed and expands possibilities.

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