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A liquid level signal conversion device for exhausted shutdown

A signal conversion, exhaustion shutdown technology, applied in the direction of the liquid level indicator for physical variable measurement, etc., can solve the problem of erroneous shutdown signal, flight failure, unreliability, etc.

Active Publication Date: 2016-07-27
BEIJING RES INST OF TELEMETRY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, for the exhaustion shutdown system that participates in the control, it is unreliable to use only the annular capacitive liquid level sensor and the processing circuit to send the shutdown signal. If any part of the sensor or the processing circuit fails, the shutdown signal will be sent by mistake. , eventually leading to flight failure

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  • A liquid level signal conversion device for exhausted shutdown
  • A liquid level signal conversion device for exhausted shutdown
  • A liquid level signal conversion device for exhausted shutdown

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Embodiment Construction

[0035] Such as figure 1 As shown, the present invention includes an annular capacitive sensor C1, an annular capacitive sensor C2, an annular capacitive sensor C3, an annular capacitive sensor C4, a housing 1, two power conversion circuit boards 2, an upper signal processing circuit board 3, and a lower signal processing circuit board 4.

[0036] Such as figure 2 As shown, four ring-shaped capacitive sensors C1, C2, C3, and C4 are respectively located in four quadrants of the same horizontal plane in the liquid storage tank; ring-shaped capacitive sensor C1 and ring-shaped capacitive sensor C2 are symmetrical to the symmetry axis of the second quadrant and the first quadrant Installation; the annular capacitive sensor C3 and the annular capacitive sensor C4 are installed symmetrically with respect to the symmetry axes of the third quadrant and the fourth quadrant.

[0037] Such as Figure 3-4As shown, the housing 1 of the present invention is located outside the liquid sto...

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Abstract

The invention discloses an exhaust shutdown liquid level signal conversion device, and relates to monitoring and control of the liquid level. The exhaust shutdown liquid level signal conversion device comprises four annular capacitive sensors, a shell, two power conversion circuit boards, an upper signal processing circuit board and a lower signal processing circuit board. The four annular capacitive sensors are located on four quadrants of the same horizontal plane in a liquid storage box respectively. The two power conversion circuit boards, the upper signal processing circuit board and the lower signal processing circuit board are respectively fixedly connected to the shell. An input connector is arranged on the shell to connect the annular capacitive sensors with the upper signal processing circuit board and the lower signal processing circuit board. The upper signal processing circuit board and the lower signal processing circuit board comprise two paths of switching circuits respectively, each path of switching circuit judges the height of the liquid surface according to capacitive signals, relays of the four paths of switching circuits are connected in series and in parallel to form a main switch, and the main switch is connected with an external control system through an output connector on the shell. By the adoption of the exhaust shutdown liquid level signal conversion device, reliability and safety of liquid level control are effectively improved.

Description

technical field [0001] The invention relates to the monitoring and control of liquid level. Background technique [0002] In many fields, real-time liquid level measurement can accurately reflect the current status information. For example, during the flight of a liquid rocket, the liquid level information when the propellant in the tank is exhausted is a key parameter in the rocket control system. It directly participates in the control and provides a shutdown signal for the engine, which is one of the key factors that determine the success of the launch. In addition, as the new generation of launch vehicles gradually abandons highly toxic and dangerous conventional propellants and begins to use non-toxic and non-polluting propellants, the widespread use of liquid hydrogen, liquid oxygen, kerosene and other propellants has become an irresistible trend. Since the liquid level measurement when the low-temperature propellant of the rocket is exhausted has the characteristics ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F23/26
Inventor 王莉莉冯红亮扈晓斌杨志红何干辉郑帮林陈青松
Owner BEIJING RES INST OF TELEMETRY
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