Device for non-contact measurement of the temperature of a hydrogenerator rotor

Abstract

Device for non-contact measurement of the temperature of a hydrogenerator rotor comprises a lens, behind which n mirrors are mounted on an optical rail such that their planes form a 45° angle with the principal optical axis, n lenses aligned on the same optical axis as the mirrors, a row of p infrared sensors, a first frequency divider, a buffer register, a switch, two analog-to-digital converters, an interface unit, two pulse generators, two controlled amplifiers, a video control unit, and two counters. A step-varying voltage generator, a memory unit, a position sensor, a position setting unit, three digital comparators, two triggers, five registers, three AND gates, a clock distributor, a digital adder, a speed setting unit, an indicator, a signal shaper, a comparator, and two digital indicators, wherein the output of the first frequency divider is connected to the inputs of the buffer register, the first counter, and the first input of the video control unit. The second and third inputs of the video control unit are connected to the outputs of the first and second controlled amplifiers, whose first inputs are connected to the output of the step-varying voltage generator, and whose second inputs are connected, respectively, to the first and second outputs of the memory unit, whose input digital bus is connected to the output digital bus of the first counter, the fourth input of the video control unit, together with the first input of the first analog-to-digital converter, is connected to the output of the switch, whose input digital bus is connected to the output digital bus of the buffer register, whose input digital bus is connected to the outputs of a row of n separate infrared sensors. The output digital bus of the first analog-to-digital converter is connected via an interface unit to the computer circuits; the output digital bus of the position-setting unit is connected to the first input digital bus of the first digital comparator, whose second input digital bus, together with the input digital buses of the first and second registers, is connected to the output digital bus of the position sensor; the output of the first digital comparator is connected to the first input of the first AND gate. The second input of the first AND gate is connected to the first output of the second trigger, and its output is connected to the first input of the first trigger, the second input of which is connected to the second output of the second trigger, the first input of which is connected to the output of the second digital comparator, the second input digital bus of which is connected to the output digital bus of the speed setting unit, and the first input digital bus of which is connected to the output digital bus of the digital adder, whose first and second input digital buses are connected, respectively, to the output digital buses of the first and second registers, whose inputs are connected, respectively, to the first and second outputs of the clock divider, the third output of which is connected to the second input of the second trigger. The output of the second pulse generator is connected to the input of the clock distributor; the output of the first trigger is connected to the first input of the second AND gate, the second input of which is connected to the output of the first pulse generator, and its output is connected to the inputs of the first frequency divider, the step-voltage generator, the switch, and the second input of the first analog-to-digital converter; the output digital bus of the second analog-to-digital converter is connected to the input digital bus of the third register, whose output digital bus is connected to the input digital bus of the fourth register and to the first input digital bus of the third digital comparator, the second digital input bus of which is connected to the digital output bus of the second analog-to-digital converter, and the output is connected to the second input of the third AND gate, the first input of which, together with the second input of the second analog-to-digital converter, is connected to the output of the second AND gate. The output is connected to the input of the third register; the output of the switch is connected to the first input of the second analog-to-digital converter and to the input of the comparator, whose output is connected to the first input of the second counter, whose output digital bus is connected to the input digital bus of the fifth register, and the second input is connected to the output of the signal shaper, whose input, together with the inputs of the fourth and fifth registers, is connected to the output of the first digital comparator; the output digital buses of the fourth and fifth registers are connected, respectively, to the input digital buses of the first and second digital indicators. It includes a fourth digital comparator, a second frequency divider, a sixth register, a third counter, and a decoder; the output digital bus of the position sensor is connected to the first input digital bus of the fourth digital comparator and to the input digital bus of the sixth register. The output digital bus of the the sixth register is connected to the second input digital bus of the fourth digital comparator, whose output is connected to the second input of the sixth register and to the input of the second frequency divider, whose output is connected to the second input of the third counter; the first input of the third counter, together with the first input of the sixth register, is connected to the output of the first digital comparator. The output digital bus of the third counter is connected to the input digital bus of the decoder, whose output digital bus is connected to the input digital bus of the indicator.