Miniaturized high-precision micro-range sensor and flowmeter
A sensor and high-precision technology, which is applied in the field of miniaturized high-precision micro-range sensors, can solve the problems of high operational requirements, easy drift, and low measurement accuracy, and achieve the effects of reduced manufacturing costs, convenient use, and high sensitivity
Active Publication Date: 2016-03-23
无锡市星翼仪表科技有限公司
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Problems solved by technology
4) Due to the reasons of material, structure, precision and price, it is generally only suitable for use under normal temperature conditions, so that the limitation of the measurement environment on the human body cannot be solved in the indirect measurement of the sensor
[0009] Due to the above defects, the small-range miniature load cell has greatly affected: 1) The sensor elastic element of the small-range miniature load cell cannot be used under harsh conditions
2) The range of the small-range miniature load cell cannot adapt to the measurement of objects with higher requirements for volume, weight and precision.
3) The production cost of the miniature load cell with higher requirements and small range is high
4) Due to the limitation of structure, material, volume and precision, the range of use of small-scale miniature load cells is difficult to be widely promoted in actual production, which makes the development of miniaturization, integration, multi-function and intelligence restricted. restrict
For example, the zero position is easy to drift, the measurement accuracy is low, and the reliability of the lever mechanism is poor, etc.
Due to the poor performance of the force balance mechanism, many advantages of the target flowmeter itself have not been effectively brought into play. So far, users have not eliminated the bad impression of the old target flowmeter. Specifically: 1) due to the composition of the vector mechanism And the original parts of the conversion unit (such as sealing film, detection amplifier) are greatly affected by temperature, so they cannot withstand high medium temperature, and the operating temperature is generally less than 150°C
2) Since the pneumatic transmitter and transducer of the pneumatic target are oscillating, they need to be installed with a damping device before they can be used, and when the instrument feels the medium pressure fluctuations and impacts, it is easy to aggravate the oscillation and affect the stability
4) The transmission part adopts a vector mechanism, and there are a large number of movable elements, which are easy to wear and deform, cannot work stably for a long time, have low precision (generally more than ±1.5%), and the adjustment workload is large, complicated and demanding
5) It is required that the vibration frequency of the pipeline should be less than 25Hz, and the full amplitude should be less than 0.1mm. It is sensitive to the pulsating pressure impact and temperature impact of the medium in the pipeline, and has high requirements for commissioning. It needs bypass pipelines, high installation costs and large maintenance.
6) The caliber is generally below 200mm, which is not suitable for large-diameter measurement, and the scope of use is limited
However, for the target flowmeter with a caliber below 15mm, the structure is not simple enough, it cannot test the small flow and the disadvantages are high cost.
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[0029] The present invention will be further described below in conjunction with specific examples.
[0030] The miniaturized high-precision micro-range sensor includes a sensor fixing front plate 1, a sensor fixing rear plate 2, a sensor elastic sheet 3, a strain gauge base 4, a strain gauge 5 and a sensor connecting plate 6.1, and the sensor fixing front plate 1 and the sensor The sensor elastic sheet 3 is fixed between the fixed back plates 2, the strain gauge 5 is fixed on the front surface and the rear surface of the sensor elastic sheet 3 through the strain gauge base 4, and the sensor connection is connected to the bottom end of the sensor elastic sheet 3. The plate 6.1 is fixedly connected with the sensor connecting rod 6.2 at the bottom end of the sensor connecting plate 6.1, and the sensor plate 6.3 is fixed at the bottom end of the sensor connecting rod 6.2, and the sensor plate 6.3 is a circular plate body; and the Both left and right sides of the sensor elastic sh...
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The invention discloses a small high-precision micro-range sensor and a flow meter. The small high-precision micro-range sensor comprises a sensor fixing front plate, a sensor fixing back plate, a sensor elastic sheet, strain gage substrates, strain gages and a sensor connecting plate. The sensor elastic sheet is fixed between the sensor fixing front plate and the sensor fixing back plate. The front surface and the back surface of the sensor elastic sheet are fixedly provided with the strain gages through the strain gage substrates. The bottom end of the sensor elastic sheet is connected with the sensor connecting plate, the bottom end of the sensor connecting plate is fixedly connected with a sensor connecting rod, the bottom end of the sensor connecting rod is fixedly provided with a round sensing plate, and the left side and the right side of the sensor elastic sheet are provided with circular-arc-shaped notches. The small high-precision micro-range sensor is small in size, the manufacturing cost of the small high-precision micro-range sensor is reduced, and the small high-precision micro-range sensor is high in sensitivity and convenient to use. The small high-precision micro-range sensor is not limited by positions and space when used.
Description
technical field [0001] The invention discloses a miniaturized high-precision micro-range sensor, and also discloses a miniaturized high-precision micro-range flowmeter. Background technique [0002] In 1940, the United States applied resistance strain gauge technology to the fields of electronic force measurement and weighing measurement in military engineering, and developed a strain load sensor. In 1942, strain gauge load cells were mass-produced in the United States and have a history of more than 70 years. [0003] In the mid-1980s, with the development of digital technology and information technology, in order to meet the digital and intelligent requirements of electronic weighing instruments and the idea of using digital weighing systems to break through the limitations of analog weighing systems, American TOLEDO, STS and CARDINAL companies, The German HBM company has successively developed integral and separate digital intelligent weighing sensors, and has become a...
Claims
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IPC IPC(8): G01D5/16G01F1/56
Inventor程星翼程成
Owner无锡市星翼仪表科技有限公司