Quick Calibration Method for Static Performance of Pressure Sensor

Abstract

The invention discloses a quick correcting system and method for static performance of a pressure sensor. The quick correcting system and method are mainly used for realizing the quick correcting and screening in the batch production of small pressure sensors and change the manual or semi-automatic operation in the traditional correcting process into automatic operation. The quick correcting system is composed of a computer, a high-speed data acquisition unit, a pressure pump, a pressure controller, a gas storage tank with a large holding cavity, a pressure pipeline, a pressure vessel with a small holding cavity, a pressurization solenoid valve, an unload solenoid valve, a pipe diameter coarse adjusting valve, a pressure valve and valve drivers. The computer controls the pressure pump to provide a pressure source for the gas storage tank with the large holding cavity, the valve drivers drive the valves to regulate the pressure change of the system to form controllable first-order variable pressure in the pressure vessel with the small holding cavity and act on a corrected pressure sensor in the pressure vessel with the small holding cavity, so that the output pressure is changed in the mode of according with the time. The high-speed data acquisition unit measures the voltage parameters output from the corrected pressure sensor, and an automatic correcting software displays and records the voltage parameters at real time.

Description

technical field [0001] The invention belongs to the technical field of measurement and testing, and relates to rapid calibration of pressure sensors under mass production conditions. Background technique [0002] Pressure sensors are widely used in aerospace delivery systems, manned space engineering systems, remote sensing measurement, environmental monitoring, medical equipment and weaponry, and their reliability directly affects the performance of measuring devices. In order to ensure that each pressure sensor produced can accurately transmit information, it is necessary to calibrate the sensor before use. The current performance test is mainly static calibration, which mainly includes three indicators: linearity, repeatability and hysteresis. [0003] The traditional way of calibrating the static performance of the pressure sensor is mainly done manually. The accuracy control of this method is complicated, and the manual addition and subtraction of weights, data record...

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Problems solved by technology

"Development of Automatic Calibration Device for Static Characteristics of Pressure Sensor" (Yu Qing. Aerospace Technology. 2008.5) proposes a calibration device consisting of six parts, including a pressure test bench, a test electrical box, a drive control box, a computer, a printer, and a standard sensor. The automatic pressurization, automatic data collection and automatic processing in the calibration process have been realized, and the calibration efficiency has been improved to a certain extent; but the static calibration accuracy of the pressure sensor is completely dependent on the pressure value calibrated by the standard sensor, and the cost of maintenance and maintenance of the device Gao; "Pressure Sensor (Static) Automatic Calibration Device" (Xu Yihui, Fan Yufu, Xue Changsheng. Spacecraft Environmental Engineering. 2005.6) proposed an industrial computer, integrated pressure controller, data collector, pressure sensor interface device printer and The calibration device composed of auxiliary facilities, etc., although the static calibration of the pressure sensor does not need to calibrate the standard sensor, but the entire calibration work needs to be tested in multiple cycles, and the efficiency is difficult to be effectively improved

The methods proposed in other articles or patents are similar to the above two schemes, and it is rare to find experimental devices that fundamentally improve the existing calibration methods and calibration methods

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