A small airflow gyroscope

Abstract

The invention relates to a minitype airflow type gyro. The gyro comprises a shell, wherein the two ends of the shell are sealed through an end cover, and the shell is internally provided with a testing cavity body; the testing cavity body is formed with an air inlet nozzle and an air outlet; a thermosensitive element is arranged in the position approaching the air outlet in the testing cavity body; a gas circulation channel is arranged between the shell and the testing cavity body and is used for connecting the air inlet nozzle and the air outlet; the outer side of the air inlet nozzle of the testing cavity body is provided with a piezoelectric pump used for pressing the gas into the testing cavity body, and the testing cavity body, the gas circulation channel and the piezoelectric pump form a closed cycle of the gas; the testing cavity body is in central symmetry along the radial direction; from the air inlet nozzle to the air outlet, the testing cavity body successively comprises a guide section used for guiding the diffusion angle of the airflow bundle, a flow section used for leading an airflow bundle to flow smoothly and a confluence section used for collecting the airflow bundle to the air outlet through a smooth inclined plane; and the thermosensitive element is arranged on the tail end of the confluence section. The minitype airflow type gyro provided by the invention has the advantages that the measuring accuracy and the stability of the gyro operation are improved.

Description

technical field [0001] The invention relates to a device for measuring the angular velocity of a moving body by means of an air jet, in particular to a small air flow gyroscope. Background technique [0002] The airflow jet gyro device is a solid-state inertial device that has the function of a gyro without the rotating part of the traditional gyro and without the suspension parts of the piezoelectric gyro. The airflow angular velocity sensor uses gas as the sensitive mass, its mass is extremely small, and it is widely used in the field of angular velocity measurement due to its advantages of low cost, short response time, and strong impact resistance. [0003] Airflow gyro in the prior art, such as figure 1 As shown, it includes a housing 1, the two ends of the housing 1 are closed by the end cap 2, and a cylindrical test chamber 7 is arranged in the housing 1, an air inlet nozzle 71 is provided at one end of the test chamber 7, and an air inlet nozzle 71 is provided at th...

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Problems solved by technology

[0004] However, since the inner space structure of the test chamber 7 has more cylindrical edges and corners, these edges and corners will hinder the flow of the air flow, and produce a vortex zone that disturbs the normal flow of the air flow, and the air flow enters the test from the inlet nozzle 71 of the small opening. The sudden change of the rear section of the chamber 7 will also cause multiple eddy current areas to be formed inside the test chamber 7, causing uneven dispersion of the airflow beam hitting the thermal element 8, reducing the measurement accuracy and seriously affecting the accuracy of the measurement results

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