A coaxial thermocouple transient heat flow sensor node laser welding conduction device

Abstract

The invention discloses a coaxial thermocouple transient heat flow sensor node laser welding conduction device, which includes a bracket and a positioning and clamping device installed on the bracket for providing multi-station clamping for a plurality of target sensors, and For the laser assembly of the positioning and clamping device, the laser assembly cuts into the surface of the negative node of the target sensor for welding until the welding spot passes through the insulating layer of the target sensor and connects with the positive surface of the target sensor. In the present invention, the negative pole of the sensor is electrically connected to the surface of the positive pole through laser welding, and the laser welding can form a welding wire with stable electrical connection on the insulating layer of the sensor to ensure the structural strength of the welding wire And stability, effectively solve the conduction problem of the insulating layer, form an efficient, wear-resistant and controllable node, and reduce the uncertainty in the measurement process.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a laser welding conduction device for coaxial thermocouple transient heat flow sensor nodes. Background technique [0002] The coaxial thermocouple transient heat flow sensor is an experimental component that uses the Seebeck effect of different electrode materials to form an electromotive force under different temperature gradients and measure it, and then inverts the temperature and heat flow. It is mainly used in aerospace hypersonic aircraft aerodynamics Experiments, hypersonic flow related experiments, etc., have the characteristics of fast response, large measurement range, high precision, and strong robustness. [0003] The sensor structure includes positive electrode material, negative electrode material and insulating layer. The insulating layer separates the two pole materials and conducts at the ends to form a measurement node. There are currently two ways to form nod...

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Problems solved by technology

[0004] The object of the present invention is to provide a laser welding conduction device for coaxial thermocouple transient heat flow sensor nodes, so as to solve the problem that the high-speed airflow easily blows off the metal particles in the insulating layer and scours the coating film during the formation of the measurement nodes in the existing heat flow sensors. Technical issues that lead to node failure

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