CN-224231015-U - Liquid level and temperature gradient measuring device in liquid nitrogen biological container

CN224231015UCN 224231015 UCN224231015 UCN 224231015UCN-224231015-U

Abstract

The utility model relates to the technical field of device calibration, in particular to a liquid nitrogen biological container liquid level and temperature gradient measuring device, which is provided with a regulating bracket vertically arranged in the inner cavity of a liquid nitrogen biological container and a regulating device for regulating a plurality of temperature sensors to be uniformly distributed at preset positions along the regulating bracket by arranging a measuring device which is connected with the measuring device and is positioned in the inner cavity of the liquid nitrogen biological container, a host computer positioned at the top end and a computer in wireless communication connection with the host computer, the intelligent temperature sensor array in the container can accurately collect temperature data, and an intelligent power management module, an Internet of things communication module, a self-calibration and fault diagnosis module and an edge calculation data processing module for accurately calculating the liquid level height in the liquid nitrogen biological container through a real-time calculated temperature gradient are arranged in the host, so that high-precision measurement, intelligent analysis and remote monitoring of the internal temperature and the liquid level of the liquid nitrogen biological container can be realized.

Inventors

LI LI
ZHANG LIN
LI FENG
WU JIA
XU YI
LIU HAIXIN

Assignees

青岛市计量技术研究院

Dates

Publication Date: 20260512
Application Date: 20250613

Claims (10)

1. A liquid level and temperature gradient measuring device in a liquid nitrogen biological container is characterized by comprising a measuring device which is connected and positioned in the inner cavity of the liquid nitrogen biological container, a host machine which is positioned at the top end of the liquid nitrogen biological container and an external control device which is in communication connection with the host machine through the Internet of things, The measuring device comprises an adjusting bracket vertically arranged in the inner cavity of the liquid nitrogen biological container, a plurality of measuring units uniformly distributed on the adjusting bracket and a regulating and controlling device for regulating the measuring units to a preset position; The host comprises a control unit for controlling the measuring device to execute instructions, and the control unit is connected with the external control device.
2. The device for measuring the liquid level and the temperature gradient in the liquid nitrogen biological container according to claim 1, wherein the measuring device further comprises an outer shell made of ultra-low temperature steel, the outer shell is provided with a shell inner cavity for containing the adjusting bracket, the measuring unit and the adjusting and controlling device, the top of the shell inner cavity is provided with an upper opening, and the upper opening is positioned at an upper opening part of the liquid nitrogen biological container.
3. The liquid level and temperature gradient measuring device in a liquid nitrogen biological container according to claim 2, wherein the adjusting bracket is provided with a bracket which is erected in the inner cavity of the shell, a space channel for inserting a plurality of measuring units which are uniformly distributed is arranged in the middle of the bracket, and soft layers are arranged on two sides of the space channel, so that the measuring units can move up and down along the space channel under the action of external force.
4. The liquid level and temperature gradient measuring device in a liquid nitrogen biological container according to claim 3, wherein the measuring unit comprises a clamping element and a temperature sensor which are fixedly inserted into a whole and have central axes coincident, the clamping element comprises a polygonal cap end and a clamping part, the polygonal cap end is attached to a vertical plane of the bracket, the clamping part horizontally penetrates through the space channel, and the temperature sensor at the end part is in contact with the outer shell body to form a longitudinal array of the temperature sensor.
5. The device for measuring the liquid level and the temperature gradient in the liquid nitrogen biological container according to claim 4, wherein the regulating and controlling device comprises a ceramic track which is arranged in parallel and vertically with the bracket, an adjusting element which is matched and jointed with the measuring unit, and a miniature electric push rod which pushes the adjusting element to slide along the track so as to drive the measuring unit to shift to a preset position.
6. The liquid level and temperature gradient measuring device in a liquid nitrogen biological container according to claim 5, wherein the adjusting element comprises a sliding block, a movable sliding block horizontally sliding along a blind road chamber arranged in the sliding block, and a spring connecting the movable sliding block with the sliding block, wherein the spring is electrically connected with a power supply module arranged on the host machine, so that when the power is on, the spring contracts to pull the movable sliding block into the blind road chamber, and when the power is off, the spring returns to drive the movable sliding block to move to a preset position.
7. The liquid level and temperature gradient measuring device in a liquid nitrogen biological container according to claim 6, wherein an adapting opening is arranged on one side of the movable sliding block facing the measuring unit, and the adapting opening is in clearance fit with the polygonal cap end.
8. The device for measuring the liquid level and the temperature gradient in the liquid nitrogen biological container according to claim 6, wherein the miniature electric push rod comprises a motor and a push rod, the end part of the push rod is fixedly connected with the sliding block, and the motor is arranged at the top end of the liquid nitrogen biological container.
9. The liquid level and temperature gradient measuring device in a liquid nitrogen biological container according to claim 8, wherein the control unit is arranged in an inner cavity of a host shell and comprises an intelligent power management module provided with a lithium battery pack, an Internet of things communication module for uploading measured data to the external control device in real time, a self-calibration and fault diagnosis module for automatically calibrating the temperature sensor regularly, and an edge calculation data processing module for accurately calculating the liquid level height in the liquid nitrogen biological container through the temperature gradient calculated in real time, and the external control device comprises a computer.
10. The liquid level and temperature gradient measuring device in the liquid nitrogen biological container according to claim 9 is characterized in that the lithium battery pack is connected with each temperature sensor and each motor through cables, and the motors and the edge calculation data processing module are connected with the external control device through the internet of things communication module.

Description

Liquid level and temperature gradient measuring device in liquid nitrogen biological container Technical Field The utility model relates to the technical field of medical equipment calibration, in particular to a liquid level and temperature gradient measuring device in a liquid nitrogen biological container. Background Biological samples are not separated from life science and medical research, and liquid nitrogen biological containers are important carriers for biological resource preservation, and are mechanisms for standardized collection, treatment, storage and management of various biological samples such as human isolated organs, tissues, cells, blood, body fluids, secretions, excretions, biomacromolecule derivatives thereof and the like, and information such as clinical diagnosis, follow-up and the like of biological sample donors. With the enhancement of biological safety consciousness in China, the market demand and the use amount of the liquid nitrogen biological container are rapidly increased, the liquid nitrogen biological container adopts liquid nitrogen as a cold source, sufficient reserve is needed to ensure that the temperature distribution of an internal gas frozen storage part meets the freezing storage requirement of a sample, common equipment is provided with a liquid level monitoring device for monitoring the liquid nitrogen liquid level, but with the use and the long-term performance drift under the low-temperature condition, the monitoring result can have larger deviation, the traditional liquid nitrogen measuring mode mainly adopts a liquid level gauge mode, the method has large error and cannot be accurately calibrated, and in order to meet the increasing complexity and accuracy demands of biological resources in the application field, meanwhile, the integrity and the effectiveness of biological samples are ensured, and a high-precision measuring device for the internal temperature and the liquid level of the liquid nitrogen biological container is urgently needed. Disclosure of utility model The utility model discloses a liquid level and temperature gradient measuring device in a liquid nitrogen biological container, and aims to solve the technical problems in the prior art. The utility model adopts the following technical scheme: the liquid level and temperature gradient measuring device in the liquid nitrogen biological container comprises a measuring device which is connected and positioned in the inner cavity of the liquid nitrogen biological container, a host machine which is positioned at the top end of the liquid nitrogen biological container and an external control device which is in communication connection with the Internet of things of the host machine, The measuring device comprises an adjusting bracket vertically arranged in the inner cavity of the liquid nitrogen biological container, a plurality of measuring units uniformly distributed on the adjusting bracket and a regulating and controlling device for regulating the measuring units to a preset position; The host comprises a control unit for controlling the measuring device to execute instructions, and the control unit is connected with the external control device. In some embodiments, the measuring device further comprises an outer shell made of ultra-low temperature steel, the outer shell is provided with a shell cavity for accommodating the adjusting bracket, the measuring unit and the regulating device, the top of the shell cavity is provided with an upper opening, and the upper opening is located at an upper end opening part of the liquid nitrogen biological container. In some embodiments, the adjusting bracket is provided with a bracket standing in the inner cavity of the shell, the middle part of the bracket is provided with a space channel for inserting a plurality of measuring units uniformly distributed, and both sides of the space channel are provided with soft layers, so that the measuring units can move up and down along the space channel under the action of external force. In some embodiments, the measuring unit comprises a clamping element and a temperature sensor which are fixedly inserted into a whole and the central axes of the clamping element are coincident, the clamping element comprises a polygonal cap end and a clamping part, the polygonal cap end is attached to the vertical plane of the bracket, the clamping part horizontally penetrates through the space channel, and the temperature sensor at the end part is in contact with the outer shell body to form a longitudinal array of the temperature sensor. In some embodiments, the regulating device comprises a ceramic track arranged in parallel with the bracket vertically, an adjusting element matched and jointed with the measuring unit, and a miniature electric push rod pushing the adjusting element to slide along the track so as to drive the measuring unit to shift to a preset position. In some embodiments, the adjusting element includes a slidi