A high-precision laser measuring device for propellant liquid level

Abstract

The invention belongs to the technical field of laser liquid level monitoring, and particularly relates to a propellant liquid level high-precision laser measuring device. The device comprises an integrated optical fiber probe, a semiconductor laser array, a narrow pulse laser driver, a photoelectric detector array, a time-to-digital converter, a time sequence generator, a main controller, a communication controller and a propellant storage tank, the narrow pulse laser driver is connected with a plurality of semiconductor lasers to form a laser array, wherein the laser array and the detector array are respectively connected with the integrated optical fiber probe, the time sequence generator is respectively connected with the narrow pulse laser driver and the time-to-digital converter, thetime-to-digital converter is connected with the photoelectric detector array, and the main controller is connected with the communication controller, the time sequence generator and the time-to-digital converter; and the integrated optical fiber probe is arranged at the top of the propellant storage tank and used for detecting liquid level position information in the storage tank. The device canreplace traditional float-type, capacitance-type and other liquid level measurement methods, is particularly suitable for dynamic liquid level measurement, greatly improves the information acquisitionamount and the detection speed, and reduces the installation space.

Description

technical field [0001] The invention belongs to the technical field of liquid level monitoring, and in particular relates to a high-precision laser measuring device under the dynamic condition of low temperature or normal temperature propellant liquid level. Background technique [0002] Low-temperature or normal-temperature propellants are flammable, explosive, and easily leaking chemical substances, mainly including liquid hydrogen, liquid oxygen, and liquid natural gas. They have the characteristics of low density, low boiling point, and easy vaporization. The measurement conditions are special. It is difficult to measure the level dynamically, and it is especially difficult to measure the liquid level accurately. [0003] At present, the liquid level measurement mainly adopts traditional liquid level measurement methods such as float type and capacitive type, but there are three disadvantages in use: [0004] 1. Single-point measurement is the main method, the equipment...

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Problems solved by technology

[0004] 1. Single-point measurement is the main method, the equipment is large in size, the number of measurement points is small, and the measurement speed is slow, which cannot meet the requirements of all-round multi-point measurement and visual measurement;

[0005] 2. When the equipment or environment to be measured is vibrated or overloaded, the method of measuring liquid level by float method and capacitance method cannot accurately and timely measure the height of liquid level;

[0006] 3. The capacitive measurement method has direct contact between electricity and low-temperature fuel. Any direct contact between electricity and low-temperature fuel will be a safety hazard and has a high potential risk

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