A resident heat probe and measurement method for measuring heat flow inside an extraterrestrial body

Abstract

The invention relates to a thermal probe for measuring heat flow inside a resident alien body and a measurement method. The thermal probe includes a connection part for connecting with a drilling component, a sensor support part and a temperature measurement part. The connection part is a hollow structure, and the sensor support The temperature measurement part is located in the hollow structure, and the temperature measurement part is installed on the sensor support part; wherein, the sensor support part can drive the temperature measurement part to pass through or retract into the hollow structure along the direction perpendicular to the drill pipe of the drilling component, so that the temperature measurement part can be horizontally fixed. Enter the interior of the extraterrestrial body and retract it to the connecting part. The thermal probe of the present invention adopts a sensor support structure, which can make the temperature measuring part go out or retract into the connecting part, and the temperature measuring part passing through the connecting part can be directly inserted into the interior of the alien body for temperature measurement, increasing the distance between the temperature measuring part and the outer body. The contact between stars reduces the influence of contact thermal resistance, avoids the influence of obvious contact thermal resistance and axial heat conduction inside the drill pipe on the temperature / temperature difference measurement accuracy, and can obtain more accurate temperature distribution of the longitudinal section inside the alien body.

Description

technical field [0001] The present invention relates to a thermal probe and a measurement method for measuring heat flow inside an alien body, in particular to a thermal probe for measuring heat flow inside an alien body based on the steady-state Fourier law of heat conduction and the transient hot wire method. Measurement methods. Background technique [0002] The temperature distribution on the surface and interior of a star is affected by both external radiation and internal heat production. External radiation includes electromagnetic radiation from the sun, etc., and internal heat generation includes the dissipated heat stored in the interior during the star formation stage and the heat generated by the radioactive decay of unstable isotopes. Among them, the internal heat flow of the planet is an important parameter to measure the activity of its crustal movement and volcanic activity, and it is also of great significance to reveal the origin and evolution of the planet...

AI Technical Summary

Problems solved by technology

[0010] Disadvantage 1: Inaccurate temperature / temperature difference measurement

There are gaps between the temperature sensor and the inner wall of the drill pipe, and between the outer wall of the drill pipe and the lunar soil, resulting in obvious contact thermal resistance between the temperature sensor and the lunar soil of the profile during the temperature measurement process, and the measured temperature / temperature difference deviates from the true value

In addition, due to the extremely low thermal conductivity of the lunar soil and the relatively high thermal conductivity of the drill pipe, the axial heat conduction inside the drill pipe during the temperature measurement process will cause the measured temperature difference of the lunar soil section to be smaller than the real value

[0011] Disadvantage 2: The temperature information used for inversion in the measurement of lunar soil thermal conductivity is limited (only one temperature value)

[0014] Disadvantage 1: The temperature information used for inversion in the measurement of lunar soil thermal conductivity is limited (only one temperature value)

This method of inversion only using the temperature change at the heating plate has the disadvantages of low reliability and accuracy

[0015] Disadvantage 2: There are defects in the design of drilling equipment for heat flow experiments

The HP3 thermal probe is an unmanned heat flow detection device. The measurement of the temperature distribution and thermal conductivity of the Mars profile relies on the front HP3 mole drill bit to continuously drill into the ground, but it is very difficult for the drill bit to drill into the ground

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