Precise temperature control circuit for refrigeration motor of anti-radiation infrared detector

Abstract

The invention provides a precise temperature control circuit of an anti-irradiation infrared detector refrigeration motor. The precise temperature control circuit comprises a temperature control sampling circuit, a temperature control circuit and a PWM generation circuit. The temperature control sampling circuit comprises a negative feedback constant current source circuit loaded to two ends of a temperature measuring diode in an infrared detector; two ends of the temperature measuring diode outputs voltage signals; the temperature control circuit comprises a difference amplification circuit, a reference voltage setting circuit, an isolation circuit and an error amplification circuit; input ends of the difference amplification circuit are connected to two ends of the temperature measuring diode, and the difference amplification circuit is used for extracting differential mode signals, changing with the temperature, of the temperature measuring diode; the reference voltage setting circuit comprises four voltage division resistors serially connected to a power supply; an input end of the error amplification circuit is connected with an output end of the difference amplification circuit, and the other output end is connected with a reference voltage through the isolation circuit, and the output end of the error amplification circuit outputs a comparison amplification level; and the PWM generation circuit comprises a comparison circuit and a triangular wave generation circuit.

Description

technical field [0001] The invention relates to a semiconductor hybrid integrated circuit, in particular to a precise temperature control circuit for a refrigeration motor of an anti-radiation infrared detector. Background technique [0002] The infrared detector is the core component of the infrared system. Its principle is to convert the infrared radiation received by the object into energy that is easy to measure or observe, so as to detect and track the target. The anti-radiation infrared focal plane detector refrigeration system converts the received infrared rays into measurable temperature, and the system judges the current state of the target according to the current temperature value. Whether the judgment of the current state of the target is accurate is closely related to the temperature control of the detector. [0003] Brushless motor drive circuits are general-purpose products and have been widely used in automotive, electronics and other fields. However, ordi...

AI Technical Summary

Problems solved by technology

However, ordinary civilians cannot meet the existing military requirements in terms of reliability and comprehensive radiation resistance.

In the traditional military field, there is no closed-loop control motor drive circuit capable of comprehensive anti-radiation, usually anti-radiation drive circuit or normal control drive circuit, and generally composed of discrete devices, which are not reliable, large in size, heavy in weight, and cannot be built-in inside the motor

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