Temperature monitoring circuit device and method

Abstract

The invention provides a temperature monitoring circuit device and method. The device includes: a voltage-stabilizing circuit module for providing a reference voltage; a temperature monitoring circuit module which is connected with the voltage stabilizing circuit and used for providing temperature sampling signals and reference voltage signals; a first signal processing module which is connected with the temperature monitoring circuit module and used for performing a subtraction operation between the sampling voltage signals and the reference voltage signals and amplifying the sampling voltage signals and the reference voltage signals; and a second signal processing module which is connected with the first signal processing module and the voltage stabilizing circuit and used for amplifying the signals and performing DC offset adjustment. In the technical scheme, a to-be-detected temperature is sampled so that the subtraction operation is performed between the temperature sampling signals and the reference signals and then the signals are amplified and the DC offset voltage adjustment is added so that an error signal is obtained and then the temperature value of the to-be-detected temperature is obtained according to the error signal. Therefore, real-time monitoring of the temperature of a turbine shroud of a breathing machine is realized and the precision of temperature monitoring is improved.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a temperature monitoring circuit device and method. Background technique [0002] Ventilator is a device that can replace, control or change people's normal physiological breathing, increase lung ventilation, improve respiratory function, reduce breathing work consumption, and save heart reserve capacity. It is more and more widely used in first aid, anesthesia and in the field of respiratory therapy. Because the turbine has the advantages of low cost, small size, high efficiency, and easy control, more and more attention has been paid to the ventilator using the turbine as the air source in the medical equipment industry. [0003] During the operation of the ventilator, various electronic devices will emit a certain amount of heat, causing heat accumulation inside the case. The change of the internal temperature of the chassis can cause the temperature drift of the...

AI Technical Summary

Problems solved by technology

The change of the internal temperature of the chassis can cause the temperature drift of the working point of the electronic components, resulting in the instability of the output signal, and finally the output error of the actuator

[0004] The technology based on turbine temperature monitoring in the prior art has the following disadvantages: (1) The accuracy of temperature monitoring is not high, and it is easily affected by power fluctuations; (2) The circuit portability is poor, and the circuit design has certain limitations

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