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 invention relates to a sensor calibration device, in particular to a calibration device for tension and pressure sensors of an aircraft elevator control system. Background technique [0002] The aircraft elevator control system is the control system of the aircraft's taxiing direction and flight attitude. The output of the force value in each direction controls the taxiing direction and flight attitude of the aircraft. The accuracy of the output force value directly affects the flight quality and flight safety. At present, the measurement of these force values ​​mainly relies on the tension and pressure sensors in the steering gear hydraulic test bench and its supporting display devices. These sensors are regularly calibrated according to the requirements of the national metrology verification regulations to ensure that their performance parameters and technical indicators are accurate and reliable. [0003] At present, the net weight (weight) cal...

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

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