DEVICE FOR REMOTE MEASUREMENT OF TEMPERATURE

The proposed device for remote measurement of temperature contains a box horn, a balanced mixer, an intermediate frequency amplifier, a square-law detector, a low-frequency amplifier, a synchronous detector, and an integrator that are connected in series, a microwave beat-frequency oscillator, the first gate element with the output connected to the second input of the balanced mixer, and a digital voltmeter connected to the integrator input. Additionally, the proposed device contains an interrupter-reflector of a microwave signal, a three-input circulator, a rejection filter, the second gate element, and a two-port voltage divider that are connected in series, an intermediate frequency oscillator, a controlled attenuator, an amplitude modulator, and the third gate element that are connected in series, and a low-frequency oscillator. The output of the rejection filter is connected to the first input of the balanced mixer. The input of the interrupter-reflector of a microwave signal is connected to the output of the box horn. The input of the two-port voltage divider is connected to the output of the microwave beat-frequency oscillator. The output of the first port of the two-port voltage divider is connected to the input of the first gate element. The output of the second port of the two-port voltage divider is connected to the input of the second gate element. The output of the third gate element is connected to the third input of the three-input circulator. The second input controlled attenuator is connected to the output of the integrator. The second input of the amplitude detector is connected to the output of the second gate element. The output of the low-frequency oscillator is connected to the second input of the interrupter-reflector of a microwave signal and to the second input of the synchronous detector. The proposed device provides the possibility to remove effect of instability of characteristics of signal amplifying and converting devices and emitting capacity of monitored objects on the measurement accuracy. Предлагаемое устройство для дистанционного измерения температуры содержит рупорную антенну, последовательно соединенные балансный смеситель, усилитель промежуточной частоты, квадратичный детектор, усилитель низкой частоты, синхронный детектор и интегратор, сверхвысокочастотный гетеродин, первый вентильный элемент, выход которого соединен со вторым входом балансного смесителя, и цифровой вольтметр, подключенный к выходу интегратора. Кроме