PULSE-FREQUENCY TEMPERATURE VARIATION RATE METER Russian patent published in 2014 - IPC G01K7/02 

FIELD: instrumentation.

SUBSTANCE: proposed meter comprises differential thermocouple 1 composed by thermocouples 2 and 3 with different time constants, amplifier 4, electronic switch 5 with memory 6 at its output. Unit for isolation of module 7 and controlled frequency generator 8 are connected to the device output and, via delay unit 9, to control input of electronic switch 5 while via generator 8, pulse standardiser 10 and inverter 11, with selectable peak detectors 12, 13, with electrodes of thermocouple 2. Output of standardiser 10 is connected via detector 13 while inverter output is connected via detector 12 Output of switch 5 with memory 6 is connected via comparator 14 with sign output of the device that controls the input of detector 12 and via logical circuit "NO" 15 with control input of detector 13.

EFFECT: higher precision and fast response.

1 dwg