Liquid level detecting device for low-temperature liquid nitrogen and detecting method thereof

A technology of liquid level detection and low temperature liquid nitrogen, which is applied to the liquid level indicator for physical variable measurement and other directions, which can solve the problems of difficult application and inability to accurately measure low temperature liquid nitrogen.

Inactive Publication Date: 2015-11-11
SUZHOU VOCATIONAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, none of these methods can accurately measure the liquid level of cryogenic liquid nitrogen (-196°C), and it is more difficult to apply in a limited installation space

Method used

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  • Liquid level detecting device for low-temperature liquid nitrogen and detecting method thereof
  • Liquid level detecting device for low-temperature liquid nitrogen and detecting method thereof
  • Liquid level detecting device for low-temperature liquid nitrogen and detecting method thereof

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Embodiment Construction

[0013] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0014] see figure 1 , the embodiment of the present invention includes:

[0015] A low-temperature liquid nitrogen liquid level detection device, comprising: a cylindrical tank 5, a capacitance sensor, a shielded cable 4 and a capacitance processing circuit 6; the capacitance sensor is cylindrical, which can prevent the capacitance from being affected by the outside world. The capacitive sensor is vertically arranged in the cylindrical tank 5, and the cylindrical tank 5 is filled with liquid nitrogen. The capacitance processing circuit 6 is connected to the shielded cable 4, and the shielded cable 4 is connected to the upper end of the capacitan...

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Abstract

The invention discloses a liquid level detecting device for low-temperature liquid nitrogen and a detecting method thereof. The liquid level detecting device comprises the components of a cylindrical tank, a capacitance sensor, a shielding cable and a capacitance processing circuit. The capacitance sensor is cylindrical. The capacitance sensor is vertically in the cylindrical tank. The capacitance processing circuit is connected with the shielding cable. The shielding cable is connected with the upper end of the capacitance sensor. The lower end of the capacitance sensor is provided with a circular hole. Through the manner of the invention, the capacitance of a capacitor can be detected, and the liquid level information of the low-temperature liquid nitrogen can be calculated according to the capacitance. The liquid level detecting device for low-temperature liquid nitrogen has advantages of simple structure, convenient use, low cost and small volume. The liquid level of low-temperature liquid can be detected.

Description

technical field [0001] The invention relates to the field of liquid level detection devices, in particular to a low-temperature liquid nitrogen liquid level detection device and a detection method thereof. Background technique [0002] In industrial applications or experimental tests, it is often necessary to detect the liquid level. The commonly used liquid level detection method is to use the flap box outside the main body of the liquid nitrogen level gauge to accept the action of the float inside the body to make the flap flip and display red and white, and then The movement of the float indicates different liquid heights; there is a striking scale scale on the left side of the indicator, and the liquid level height of the liquid can be obtained according to the displayed red and white scale scales. Another method is to set at least two pressure sensors in the liquid contained in the liquid measuring cylinder, and calculate the liquid pressure difference and the gas press...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F23/26
Inventor 张进峰高小荣李晓霞
Owner SUZHOU VOCATIONAL UNIV
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