Signal processing method of single-power-supply high-temperature LVDT sensor with temperature sensor

Abstract

The invention belongs to the field of sensor signal processing, and particularly relates to a signal processing method of a single-power-supply high-temperature LVDT sensor with a temperature sensor. Through an LVDT sensor in a high-temperature area, a platinum resistor temperature sensor in the high-temperature area, an armored signal cable and a single-power-supply signal processing circuit part in a low-temperature area, multi-path signals detected by the sensor are transmitted from a high-temperature area to a low-temperature area through the high-temperature-resistant multi-path armored signal cable. The single-power-supply signal processing circuit part comprises a floating constant current source, a PT100 temperature signal amplification circuit, a temperature signal extraction circuit, an LVDT signal amplification circuit, an LVDT signal extraction circuit and a reference voltage Vref10. The single-power-supply high-temperature LVDT sensor with the temperature sensor has the advantages of being minimum, resistant to high temperature, bendable, simple in circuit and the like.

Description

technical field [0001] The invention belongs to the field of sensor signal processing, in particular to a signal processing method of a high-temperature LVDT sensor with a single power supply and a temperature sensor. Background technique [0002] There are more and more applications of small sensors in high-temperature environments in compact spaces, and the transmission of test signals needs to use high-temperature signal cables from the high-temperature end to the low-temperature end. When the high temperature exceeds 300 degrees, cables using organic materials cannot be used. Armored signal cables are made of inorganic materials, which can be used in high temperature environments. It consists of a wire for transmitting electrical signals, a magnesium oxide insulating layer, and a stainless steel sheath. In the narrow and compact space of small sensors, the armored signal cable has a large hardness and a large bending radius, and there are many inconveniences in the use...

AI Technical Summary

Problems solved by technology

In the narrow and compact space of small sensors, the armored signal cable has a large hardness and a large bending radius, and there are many inconveniences in the use process. In a curved environment, the outer diameter of the armored signal cable is required to be thin, so that it can be bent and laid in a curved environment.

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