Automatic calibration and automatic measurement device of fluid flow test probe

Abstract

The invention discloses an automatic calibration and measuring device of a fluid flowing test probe, which comprises a mechanical part and an electric control part, and can finish the following three actions that control the motion of the probe: the probe can realize topping rotation around a horizontal shaft O2-O2 by a probe topping angle adjusting mechanism with a first numerical control electric motor; the probe can realize translation motion along the horizontal shaft O2-O2 by a probe translation motion adjusting mechanism with a second numerical control electric motor; the probe can realize skew rotation around a vertical shaft O1-O1 by a probe skew angle adjusting mechanism with a third numerical control electric motor. According to a motion feedback signal, three numerical control electric motors are coordinated under control of a computer, and a data collecting system is combined so as to automatically finish the calibration and measurement jobs of the fluid test probe. Compared with the tests with manual operation, the automatic calibration and measuring device of the fluid flowing test probe improves testing precision and saves time and labor power.

Description

technical field [0001] The invention relates to a device capable of realizing automatic calibration and automatic measurement of fluid flow test probes. Background technique [0002] In the flow test of fluid machinery, single-hole, three-hole and five-hole probes are widely used, mainly used to measure the total pressure, static pressure, velocity and direction of the fluid. The calibration and measurement workload of this type of probe is very large. Calibration is divided into characteristic calibration and direction calibration, which mainly determines the pressure (pressure difference)-velocity characteristic (curve) and direction coefficient (curve). In the direction calibration, it is necessary to change the angle of the probe hole relative to the airflow in the calibration wind tunnel several times, and then conduct tests and analysis to obtain the corresponding direction coefficient curve. When measuring, it is necessary to adjust the direction angle of the probe ...

AI Technical Summary

Problems solved by technology

[0003] At present, the calibration and measurement work of this type of probe is mainly done manually. In this way, a lot of time is spent on adjusting the probe rotation angle, reading and recording experimental data, so the work is cumbersome, time-consuming and laborious, and the work efficiency is low.

Moreover, there are many manual operations, which are easy to introduce the judgment error of the personnel themselves, and the measurement accuracy is low

[0004] At present, there is also a technology that combines computer data acquisition technology with manual operation of mechanical mechanisms, which can reduce the workload of reading data to a certain extent. However, it is still necessary to manually rotate the probe angle, and the workload is still very large.

Images