Astronautic programmable thermocouple temperature transmitter

Abstract

The invention relates to an astronautic programmable thermocouple temperature transmitter. A circuit part is composed of a power circuit, a programmable amplifying circuit, a programmable cold junction compensation circuit, an operation amplifying circuit and an output protecting circuit, wherein the functions of power filtering, reverse connection protection, transient impact protection, and the like, are achieved by the power circuit; a thermocouple signal is adjusted to be in a suitable voltage range by the programmable amplifying circuit; the programmable cold junction compensation circuit is used for sensing the temperature of a cold junction of the thermocouple, converting a temperature signal of the cold junction into a voltage signal and compensating the temperature of the cold junction of the thermocouple; output signals of the programmable amplifying circuit and the programmable cold junction compensation circuit are operated and amplified to be 0-5V by the operation amplifying circuit; and the output protecting circuit is used for limiting an output voltage within a scope of -0.5V to +6.5V and protecting a next-stage system from being damaged when the circuit is in fault. The astronautic programmable thermocouple temperature transmitter has the advantages of high intelligent degree, adjustable range, no requirement for hardware debugging, suitability for batch production and suitability for thermocouples of K type, E type, T type and tungsten rhenium type.

Description

technical field [0001] The invention relates to a programmable thermocouple temperature transmitter for aerospace, belonging to the field of electromechanical integration. Background technique [0002] Temperature is an important measurement parameter in aerospace vehicles and weapon models. Thermocouple is one of the main principles of temperature measurement, among which K, E, T and tungsten-rhenium types account for more than 98% of thermocouple products. The number of thermocouples for single-shot carrier and weapon models can reach dozens, even close to 100, and the temperature range can reach dozens. With the high-density launch requirements of aerospace vehicles and weapon models, the number of matching thermocouple temperature transmitters has increased rapidly, which puts forward the requirements for intelligent and mass production. [0003] Existing models of thermocouple temperature transmitters are difficult to meet the above requirements, mainly in: [0004] 1...

AI Technical Summary

Problems solved by technology

[0004] 1) The measuring range of the existing products is adjusted by the resistance value of the internal resistance, the hardware of the same series of products is inconsistent, the production efficiency is low, and it is not suitable for mass production;

[0005] 2) Existing products require hardware debugging due to differences in components, and the debugging process is cumbersome;

[0006] 3) After the assembly of existing products is completed, the measuring range cannot be changed, and the degree of intelligence is low

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