Liquid level detection system of liquid nitrogen container

Abstract

The invention discloses a liquid level detection system of a liquid nitrogen container. The liquid level detection system comprises a detection device and an alarm display, wherein the detection device comprises a liquid nitrogen container cover, a switch component, a floating ball, a suspension wire and an information processing transmission component; the switch component and the information processing transmission component are mounted inside the liquid nitrogen container cover; the floating ball is connected with the switch component through the suspension wire; the alarm display comprises a voltage stabilizing power supply, a second radio transceiving module, a second single-chip microcomputer, a liquid crystal display, a buzzer and an RS232-USB interface converter which are all mounted inside a case; data communication can be achieved through a wireless data transmission technique and information processing transmission components. The liquid level detection system has the advantages that the system has a remote communication detection function, a liquid level detection device and a liquid nitrogen container cover can be integrally combined, the power consumption is small, the power can be supplied through batteries, accurate liquid level alarms can be made, and the liquid level states of a plurality of liquid nitrogen tanks can be displayed through one alarm display.

Description

technical field [0001] The invention relates to the field of detection equipment, in particular to a liquid nitrogen tank liquid level detection system. Background technique [0002] Liquid level gauges are widely used in medical and health care, animal husbandry, stem cell research and various laboratories, and are used for liquid nitrogen level monitoring in liquid nitrogen tanks. [0003] Ordinary liquid level gauges are usually used in a room temperature environment. In an ultra-low temperature environment such as liquid nitrogen, general electronic devices will fail. At present, the low liquid level alarms of liquid nitrogen tanks that are widely used are all on the original liquid nitrogen tank cover. Drill a hole to install a temperature sensor (platinum resistance), which is connected to the display alarm attached to the outer wall of the liquid nitrogen tank (or fixed on the original liquid nitrogen tank cover), and is inserted into the liquid nitrogen tank by detec...

AI Technical Summary

Problems solved by technology

[0004] Electronic components and sensors that work for a long time will age or even be damaged, causing large errors in temperature measurement and even paralyzing the entire alarm system

Every time the staff takes off and puts on the lid of the liquid nitrogen tank, they will pull the wire connecting the sensor and the display alarm, which brings a lot of inconvenience to the operation. The temperature measuring device of each liquid nitrogen tank needs an external power supply to place the liquid nitrogen tank The site needs to lay multiple power supply lines, which has buried many safety hazards on the site

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