LNG (liquefied natural gas) liquid level gauge and method for measuring liquid level
A liquid level gauge and circuit technology, which is applied in the field of LNG level gauge and liquid level measurement, can solve the problems of inconvenient installation of display instruments, affecting the appearance of the cab, supporting fuel gauges, etc., and achieves simple and reasonable structure, convenient manufacturing, and convenient use. Effect
Inactive Publication Date: 2012-07-18
济南中森机械制造有限公司
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Problems solved by technology
[0002] At present, the LNG liquid level gauge and liquid level measurement method on the market are mainly composed of capacitive sensors, transmitters and special display instruments, which cannot be matched with the fuel gauge of the car itself. The versatility is poor, and the display instrument is inconvenient to install, which affects the cab beautiful
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[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0024] Such as figure 1 , provides a structural schematic diagram of the capacitive sensor part of the LNG liquid level gauge of the present invention, which includes a lower fixing seat 2, an upper fixing seat 9, an inner tube 4, an outer tube 5, an inner tube lower bracket 1, an inner tube upper bracket 8, Insulation support 3, terminal block 6, coaxial cable 7, liquid inlet 15; the inner tube 4 and the outer tube 5 shown are both cylindrical structures with openings at both ends, and are made of conductive materials, and the inner tube 4 is located outside In the tube 5 and they are coaxially arranged; the outer diameter of the inner tube 4 is smaller than the inner diameter of the outer tube 5, so that an annular cavity for accommodating LNG is formed between the inner tube 4 and the outer tube 5, and the inner tube 4 and the outer tube 5 Tube 5 ac...
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The invention discloses an LNG (liquefied natural gas) liquid level meter, which comprises a capacitance sensor portion and a circuit portion. The LNG liquid level meter is characterized in that the circuit portion consists of a signal acquisition and processing circuit and a microcontroller, the microcontroller is further connected with a clock circuit, a reset circuit and a power module, a digital value which is computed by the microcontroller is inputted into a 16-bit serial-in parallel-out shift register via a serial communication module, and the 16-bit serial-in parallel out shift register is connected with a fuel gauge by a digital-to-analog conversion circuit. A method for measuring liquid level includes a, releasing charge on polar plates; b, charging the polar plates; c, computing charging time; and d, computing the height of the liquid level of LNG according to the charging time. The liquid level meter and the method for measuring the liquid level has the advantages that an inner tube and an outer tube are used as the two polar plates of a capacitor, the LNG is used as dielectric between the two polar plates, the height of the liquid level of the LNG is effectively computed by means of computing the charging time of the polar plates, and then is displayed by the aid of the existing electromagnetic fuel gauge, a special liquid level display instrument does not need to be additionally installed in a cab, and the LNG liquid level gauge is quite convenient in use.
Description
technical field [0001] The invention relates to an LNG liquid level gauge and a liquid level measuring method, more specifically, to a capacitive LNG liquid level gauge and a liquid level measuring method which calculates the liquid level according to the charging time of the capacitor. Background technique [0002] At present, the LNG liquid level gauge and liquid level measurement method on the market are mainly composed of capacitive sensors, transmitters and special display instruments, which cannot be matched with the fuel gauge of the car itself. The versatility is poor, and the display instrument is inconvenient to install, which affects the cab beautiful. Contents of the invention [0003] In order to overcome the shortcomings of the above-mentioned technical problems, the present invention provides a capacitive LNG liquid level gauge and a liquid level measurement method that calculates the liquid level according to the charging time of the capacitor. [0004] Th...
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IPC IPC(8): G01F23/26
Inventor 秦荣健崔健刘常虹姜亮亮
Owner 济南中森机械制造有限公司