Differential pressure sensor
A differential pressure sensor and sensor probe technology, applied in the field of sensors, can solve the problems that the optical fiber pressure sensor is not suitable for measuring the fluid pressure difference, the pressure measurement and calculation are cumbersome, the sensor performance stability is poor, etc., to achieve the improvement of adaptability and interchangeability, Not easy to be disturbed by the outside world, strong practical effect
Inactive Publication Date: 2015-11-11
GUIZHOU UNIV
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Problems solved by technology
[0005] The purpose of the present invention is to provide a differential pressure sensor to solve the problem that the measurement and calculation of the pressure by the existing elastic diaphragm pressure sensor is complicated, the measurement accuracy is not high, and the performance stability of the existing sensor is poor, so that the optical fiber pressure The sensor is not suitable for measuring fluid pressure difference, and its service life is short
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[0020] refer to figure 1 and figure 2 , the present embodiment provides a differential pressure sensor, including a sensor probe, a photodetector 2 and a signal processor 3, the sensor probe includes two detection probes 1, the structures of the detection probes 1 are the same, and each detection probe 1 All have the following structure: the detection probe 1 includes a shell 11 with a cylindrical structure, a piston 12 is slidably arranged in the shell 11, the material of the piston 12 is hard alloy, and a sealing ring is arranged between the piston 12 and the inner wall of the shell 11 18. One end of the housing 11 is provided with an end cover 13, and the other end of the housing 11 is provided with a fluid through hole 111, and a filter screen 17 is provided on the fluid through hole 111, and the sliding between the piston 12 and the end cover 13 along the piston 12 The direction is also provided with a spring 14, one end of the spring 14 is fixed on the piston 12, and t...
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The invention provides a differential pressure sensor. The differential pressure sensor comprises a sensor probe, photoelectric detectors and a signal processor; the sensor probe includes two detection probes; the structures of the detection probes are identical; each detection probe comprises a shell of a cylindrical structure; a piston is arranged in the shell in a sliding manner; one end of the shell is provided with an end cover; a fluid through hole is formed at the other end of the shell; a spring is arranged between the piston and the end cover along the sliding direction of the piston; a through hole is formed in the end cover; one end of the piston, which is aligned with the through hole, is fixedly provided with a reflector; an optical fiber probe which faces the reflector is arranged in the through hole; emergent optical fibers of the optical fiber probes in the two detection probes are respectively connected with one photoelectric detector; and the two photoelectric detectors are respectively connected with the signal processor. With the differential pressure sensor adopted, problems such as complex measurement and calculation, and low measurement accuracy of an existing elastic diaphragm type sensor, and problems such as lower stable performance and short service life of an existing sensor can be solved. The differential pressure sensor of the invention belongs to the differential pressure detection field.
Description
technical field [0001] The invention relates to a sensor and belongs to the technical field of optical fiber sensing. Background technique [0002] Differential Pressure Sensor DPS (Differential Pressure Sensor) is a sensor used to measure the difference between two pressures, usually used to measure the pressure difference between the front and rear ends of a device or component. In recent years, differential pressure sensors have been widely used in many high-precision measurement occasions such as micro-flow measurement, leak testing, clean room monitoring, environmental tightness testing, gas flow measurement, and liquid level measurement. [0003] At present, the research on differential pressure sensors at home and abroad mainly focuses on the traditional piezoresistive differential pressure sensors and capacitive differential pressure sensors. The piezoresistive differential pressure sensor has a simple structure and a flat working surface, but there is a prominent c...
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Inventor 胡浩钟丽琼
Owner GUIZHOU UNIV