Movable container type high-precision micro-pressure detection device
A detection device and high-precision technology, which can be used in measurement devices, pressure difference measurement between multiple valves, instruments, etc., and can solve problems such as high cost and low measurement accuracy.
Inactive Publication Date: 2015-04-15
SHANGHAI INST OF MEASUREMENT & TESTING TECH
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Problems solved by technology
[0010] The technical problem to be solved by the present invention is to provide a mobile container-type high-precision micro-pressure measuring device, which solves the defects of high cost or low measurement accuracy of current micro-pressure measuring equipment
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[0030] Below in conjunction with specific embodiment, further illustrate the present invention.
[0031] In view of the shortcomings of the above analysis, the present invention designs a micro-pressure measuring device with a measurement range of ±8kPa and a measurement accuracy of ±0.1Pa. This set of micro-pressure measurement device adopts Moiré fringe subdivision grating ruler, and the measurement accuracy reaches ±2μ, which is used for the measurement of the displacement of the movable container. Use two laser displacement meters to measure the liquid level in movable and fixed containers, so that you don't need to use human eyes to observe the position of the cone tip and take a reading directly. Temperature sensors are placed in each container and pipeline for temperature monitoring and real-time correction. The movement of the movable container is driven by the stepping motor and the lifting screw to move the container up and down, which avoids the trouble of turning ...
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The invention relates to a micro-pressure detection device, belongs to the detection field, and provides a movable container type high-precision micro-pressure detection device. The movable container type high-precision micro-pressure detection device is characterized in that the movable container type high-precision micro-pressure detection device comprises a fixed container and a movable container, the fixed container and the movable container are communicated through a soft pipe, the movable container is arranged on a lifting platform, the lifting platform is arranged on a lifting guide rail and is driven by a lifting screw to descend or ascend on the lifting guide rail, the lifting screw is driven by a stepping motor, a grating ruler is arranged beside the lifting platform, laser displacement meters used for metering liquid level heights are arranged on the top of the movable container and the top of the fixed container, the fixed container or the movable container is provided with a pressure connector, the stepping motor, the grating ruler and the laser displacement meters are in electric connection with a controller, and the controller comprises a pressure measurement module and a pressure control module. The grating ruler and the laser displacement meters send measured data to the pressure measurement module for micro-pressure measurement and computation, and the pressure control module is connected with the stepping motor and the pressure connector to control the pressure to be stable and starting and stopping of the stepping motor.
Description
technical field [0001] The invention relates to a micro-pressure detection device, in particular to a mobile container-type high-precision micro-pressure detection device. Background technique [0002] Micro-pressure measurement is widely used in modern agriculture, manufacturing, pharmaceutical industry, transportation industry, aerospace, aviation, national defense and other fields. In recent years, there has been a lot of research on micro-pressure measurement in the world, but the main ones are straight-tube liquid column differential liquid manometers and micro-pressure piston manometers. The scope of the research is also mainly focused on the national benchmark pressure gauge. Micromanometers like working reference and first class haven't changed much over the decades. The basic level micromanometer is extremely expensive and bulky, and cannot be applied to the value transmission of a large number of second-class standards and working measuring instruments. At prese...
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IPC IPC(8): G01L13/04G01L27/00
Inventor 潘征宇洪扁张进明胡玲
Owner SHANGHAI INST OF MEASUREMENT & TESTING TECH