Portable calibrating device for pull pressure sensor

Abstract

The invention discloses a pull pressure sensor which is a sensor used for pull pressure measurement of an aircraft elevator control system. The sensor has the characteristics of two-way force measurement, long range, high precision, continuous application force value points and the like. Aiming at solving the problem that weight calibration cannot realize the continuous loading of a force value in the traditional method of dead weight type (weight) calibration, a pull pressure calibration device is developed in the invention based on a hydraulic sensor technology and comprises a one-way quantitative hydraulic pump, a bidirectional hydraulic control module, a one-way oil-return device, a special calibration clamp, a calibration force sensor and a standard force value display. The device is developed based on a measurement principle of a back-to-back comparative method, intensively solves three key problems on two-way continuous force source, two-way large-range loading force (100,000N) and portability (26cm*21cm*82cm) of the whole set of device. The device can also be used for the calibration of the pull pressure sensors with the precision lower than 0.05 percent in other fields.

Description

Technical field [0001] The present invention relates to a sensor calibration device, specifically, to a calibration device for a tension pressure sensor in an aircraft elevator control system. Background technique [0002] The aircraft elevator control system is a control system for the taxiing direction and flight attitude of the aircraft. It mainly uses left extension driving force, right extension driving force, left retraction driving force, right retraction driving force, left output rocker arm force and right output rocker arm force, etc. 6 The force value output in each direction controls the taxiing direction and flight attitude of the aircraft. The accuracy of the output force value directly affects flight quality and flight safety. At present, the measurement of these force values ​​mainly relies on the tensile pressure sensor and its supporting display device in the steering gear hydraulic test bench. These sensors are regularly calibrated in accordance with the r...

AI Technical Summary

Problems solved by technology

[0003] At present, the net weight (weight) calibration method is used for large-range tension and pressure sensors (above 30000N). This method has high precision and good reliability, but these weights are bulky and inconvenient to carry, and most of the net weight measurement The standard device is composed of a fixed lever and an electric mechanism, which is not suitable for carrying, and cannot carry out portable and mobile measurement

In addition, the tension and pressure sensor is applied in an environment where the force value is continuously loaded, and the net-weight calibration device does not have the function of continuously loading the force value, which has great limitations for the calibration of the sensor's nonlinear parameters

Images