A liquid nitrogen tank liquid level detection system

Abstract

A liquid level detection system for a liquid nitrogen tank, including a detection device and an alarm display, the detection device includes: a liquid nitrogen tank cover, a switch assembly, a float, a hanging wire, and an information processing and transmission assembly, and the switch assembly and the information processing and transmission assembly are installed on the Inside the liquid nitrogen tank cover, the floating ball is connected with the switch assembly through the hanging wire; the alarm display, including the stabilized power supply, the second radio transceiver module, the second single-chip microcomputer, the liquid crystal display, the buzzer and the RS232‑USB interface converter are all installed It is located inside the chassis, and communicates data with the information processing and transmission components through wireless data transmission technology. The advantage is that the system has a long-distance communication detection function, and can combine the liquid level detection device with the liquid nitrogen tank cover, low power consumption, battery power supply, accurate alarm liquid level, and one alarm display can display multiple liquid nitrogen The level status of the tank.

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 normal temperature environment. In an ultra-low temperature environment like 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 detect...

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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