High-precision LNG filling station using integrated optical fiber sensor

Abstract

The invention discloses a high-precision LNG filling station using an integrated optical fiber sensor. According to the high-precision LNG filling station using the integrated optical fiber sensor, a database server is connected to a modem, an application server and a WEB server are connected to the database server, a first F-P chamber pressure sensor and a second F-P chamber pressure sensor respectively further comprise a diaphragm, chamber body, a light-guiding optical fiber and a collimator tube, the upper surface of the chamber body is provided with a concave groove, the diaphragm covers the concave groove to form a vacuum chamber, the upper end surface of the collimator tube is adhered and connected to the bottom end of the chamber body, a remote monitoring terminal is connected to the database server through an Internet so as to real-timely access the press and temperature data information, a composite medium membrane is formed by stacking a silicon nitride layer and a tantalum pentoxide layer, the silicon nitride layer contacts the diaphragm, and the tantalum pentoxide layer is toward the concave groove. According to the present invention, any forms of electricity is not introduced, and the high-precision LNG filling station has advantages of essential explosion-proof characteristic, small volume, high sensitivity, corrosion resistance, electromagnetic interference resistance, and the like.

Description

technical field [0001] The invention relates to a high-precision LNG filling station using an integrated optical fiber sensor, belonging to the field of safety monitoring of LNG filling stations. Background technique [0002] At present, domestic LNG refueling stations purchase goods according to the national practice, and they are handed over according to the quality. We usually use weighbridges to calculate the difference between heavy vehicles and empty vehicles to determine the quality of the goods purchased. The weighbridge weighing method using indirect measurement brings great inconvenience to the measurement work in the production and sales process. After analysis, we believe that the following problems currently exist in the measurement of LNG sales: [0003] (1) Extended delivery time: LNG tankers have to go to the metering place (weighbridge) near the gas filling station to complete two weighings, which affects the timeliness of delivery and affects work efficienc...

AI Technical Summary

Problems solved by technology

[0003] (1) Extended delivery time: LNG tankers have to go to the metering place (weighbridge) near the gas filling station to complete two weighings, which affects the timeliness of delivery and affects work efficiency

[0004] (2) The measurement accuracy is low: the measurement platform accuracy is difficult to reach a high level due to the influence of many factors, generally around 5%

[0005] (3) The measurement process is difficult to control: due to the inability to implement real-time monitoring during the LNG measurement process, there are many uncontrollable factors such as the error of the measuring tool itself, temperature, pressure, and human factors during the delivery process

The accuracy of measurement cannot be guaranteed during the delivery process

[0006] (4) The purchase process is difficult to manage: when LNG is imported and shipped, it cannot be monitored in real time during measurement and delivery, and management personnel cannot remotely monitor the whole process of purchase in real time, and cannot control the actual situation of the measurement process, resulting in lag in measurement, statistics, and management , can not meet the requirements of refined management

[0007] (5) Existing metering equipment is affected by the external environment to cause metering errors

[0012] Although traditional pressure sensors or liquid level gauges based on electrical principles can realize continuous monitoring of the liquid level or pressure of LNG storage tanks, on-site monitoring requires the introduction of electricity, and LNG filling stations belong to flammable and explosive hazardous environments. Therefore, traditional Electrical pressure sensors or liquid level gauges are not suitable for safety monitoring of LNG filling stations

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