CN204348054U - A kind of long-range liquid nitrogen level monitoring system based on GPRS - Google Patents
A kind of long-range liquid nitrogen level monitoring system based on GPRS Download PDFInfo
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- CN204348054U CN204348054U CN201420839060.8U CN201420839060U CN204348054U CN 204348054 U CN204348054 U CN 204348054U CN 201420839060 U CN201420839060 U CN 201420839060U CN 204348054 U CN204348054 U CN 204348054U
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Abstract
The utility model belongs to wireless monitor technical field, particularly a kind of long-range liquid nitrogen level monitoring system based on GPRS.This level monitoring system comprises 5V power module, 5V turns 24V DC-DC level switch module, platinum resistor temperature measuring module, ultrasonic probe, AVR single chip, GPRS module.Annexation between each several part is: 5V power module is that single-chip microcomputer and GPRS module are powered, turning 24V DC-DC module by 5V is that ultrasonic probe and platinum resistance measurement module are powered, temperature in liquid nitrogen bottle is measured by platinum resistance, ultrasonic probe measures ultrasound wave is reflected back probe mistiming through liquid nitrogen liquid level, the distance of probe and liquid nitrogen liquid level can be calculated again according to the velocity of sound under different temperatures, and then calculate liquid level by liquid nitrogen bottle height degree, liquid level information is sent to receiving trap by GPRS module.This utility model is monitored temperature while achieving real-time remote monitoring liquid nitrogen liquid level, is convenient to the correlation parameter recording low temperature environment in liquid nitrogen bottle, improves the reliability of liquid nitrogen cryogenics environment, also have volume little, advantage low in energy consumption.
Description
Technical field
The utility model belongs to power technique fields, particularly a kind of long-range liquid nitrogen level monitoring system based on GPRS.
Background technology
Liquid nitrogen is the liquid condition of nitrogen, and under normal pressure, temperature is 77K (-196 ° of C).Due to its low temperature physical properties and chemical inertness, liquid nitrogen may be used for as deep refrigerating agent, at frozen food, biomedical, in freezing research and superconductor applications, has a wide range of applications.The Dewar flask storing liquid nitrogen is in actual applications nontransparent low-temperature (low temperature) vessel, and because the boiling point of liquid nitrogen is very low, under normal temperature, liquid nitrogen is ceaselessly evaporating, ullage aerosol mixes, liquid level is difficult to distinguish, is difficult to the liquid level grasping liquid nitrogen in Dewar flask in time, ensures good low temperature environment.For the ease of realizing the detection and control to liquid nitrogen fluid level condition, need a kind of simple and reliable liquid level data harvester and supervisory system.
Conventional liquid level gauge all needs staff's execute-in-place, and be not easy to data and store, monitoring efficiency is low.Long-range liquid nitrogen level monitoring system based on GPRS effectively to an on-site data gathering, and need not be able to be in the action, and substantially increases monitoring efficiency.
Summary of the invention
The purpose of this utility model is to provide a kind of long-range liquid nitrogen level monitoring system based on GPRS, is achieved through the following technical solutions:
This system comprises 5V power module, 5V turns 24V DC-DC level switch module, platinum resistor temperature measuring, ultrasonic probe, single-chip minimum system, GPRS module.
Annexation between each several part is:
5V power module is that single-chip microcomputer and GPRS module are powered, turning 24V DC-DC module by 5V is that ultrasonic probe and platinum resistance measurement module are powered, temperature in liquid nitrogen bottle is measured by platinum resistance, ultrasonic probe measures ultrasound wave is reflected back probe mistiming through liquid nitrogen liquid level, the distance of probe and liquid nitrogen liquid level can be calculated again according to the velocity of sound under different temperatures, and then calculate liquid level by liquid nitrogen bottle height degree, level value is sent to receiving trap by GPRS module.
It is NN1-05E24B that described 5V turns 24V DC-DC module model, input voltage 5V(4. 5 ~ 5.5VDC) time output voltage 24VDC, to supply ultrasonic probe.
The chip model of described AVR single chip is ATmega128A, and this 8-bit microcontroller, for extracting temperature signal in liquid nitrogen bottle, reads ultrasonic probe signal, calculates level value and control GPRS transmission data.
Described ultrasonic probe model is T30UINAQ, and its mode of connection is 5 core socket connector types, and supply voltage adopts 24V mode.
Described GPRS module model is MD-309G, operating voltage 5V.
The utility model provides a kind of long-range liquid nitrogen level monitoring system based on GPRS, its beneficial effect is: utilize GPRS module that liquid level, temperature information real-time online in liquid nitrogen bottle are sent to receiving trap, substantially increase the monitoring efficiency to liquid nitrogen liquid level, accomplish that volume is little, low-power consumption, economical and practical.
Accompanying drawing explanation
Fig. 1 is described a kind of long-range liquid nitrogen level monitoring system structured flowchart based on GPRS.
Fig. 2 is described a kind of long-range liquid nitrogen level monitoring system fundamental diagram based on GPRS.
Embodiment
The utility model provides a kind of long-range liquid nitrogen level monitoring system based on GPRS, is described further the utility model below in conjunction with the drawings and specific embodiments.
Figure 1 shows that described a kind of long-range liquid nitrogen level monitoring system structured flowchart based on GPRS, mainly comprise 5V power module, 5V turns 24V DC-DC level switch module, platinum resistor temperature measuring module, ultrasonic probe, single-chip minimum system, GPRS module.As shown in Figure 1,5V power module is that single-chip microcomputer and GPRS module are powered, turning 24V DC-DC module by 5V is that ultrasonic probe and platinum resistance measurement module are powered, temperature in liquid nitrogen bottle is measured by platinum resistance, ultrasonic probe measures ultrasound wave is reflected back probe mistiming through liquid nitrogen liquid level, the distance of probe and liquid nitrogen liquid level can be calculated again according to the velocity of sound under different temperatures, and then calculate liquid level by liquid nitrogen bottle height degree, level value is sent to receiving trap by GPRS module.
Figure 2 shows that described a kind of long-range liquid nitrogen level monitoring system fundamental diagram based on GPRS.Comprise the collection radiating portion of data and the reception preservation part of data.After start, system carries out initialization, gather the enabling signal of emission part branch wait-receiving mode device, after receiving enabling signal, advanced trip temperature is measured, then temperature value is utilized to correct acoustic velocity measutement liquid level, and liquid level information is sent by GPRS module, finally by having judged whether shutdown signal, if any shutdown signal then shutdown system otherwise continue monitoring; Receive storage unit to divide and send wait-receiving mode data after enabling signal, and preserve data, finally select whether to close monitoring system; The remote monitoring of ground liquid nitrogen liquid level is realized by above-mentioned steps.
Claims (4)
1. based on a long-range liquid nitrogen level monitoring system of GPRS, it is characterized in that: comprise 5V power module, 5V turns 24V DC-DC level switch module, platinum resistor temperature measuring, ultrasonic probe, single-chip minimum system, GPRS module;
Annexation between each several part is:
5V power module is that single-chip microcomputer and GPRS module are powered, turning 24V DC-DC module by 5V is that ultrasonic probe and platinum resistance measurement module are powered, temperature in liquid nitrogen bottle is measured by platinum resistance, ultrasonic probe measures ultrasound wave is reflected back probe mistiming through liquid nitrogen liquid level, the distance of probe and liquid nitrogen liquid level can be calculated again according to the velocity of sound under different temperatures, and then calculate liquid level by liquid nitrogen bottle height degree, liquid level information is sent to receiving trap by GPRS module.
2. a kind of long-range liquid nitrogen level monitoring system based on GPRS according to claim 1, is characterized in that: it is NN1-05E24B that described 5V turns 24V DC-DC module model, output voltage 24VDC during input voltage 5V.
3. a kind of long-range liquid nitrogen level monitoring system based on GPRS according to claim 1, is characterized in that: the model of described single-chip microcomputer is ATmega128A.
4. a kind of long-range liquid nitrogen level monitoring system based on GPRS according to claim 1, it is characterized in that: described ultrasonic probe model is T30UINAQ, its mode of connection is 5 core socket connector types, and supply voltage adopts 24V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420839060.8U CN204348054U (en) | 2014-12-26 | 2014-12-26 | A kind of long-range liquid nitrogen level monitoring system based on GPRS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420839060.8U CN204348054U (en) | 2014-12-26 | 2014-12-26 | A kind of long-range liquid nitrogen level monitoring system based on GPRS |
Publications (1)
| Publication Number | Publication Date |
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| CN204348054U true CN204348054U (en) | 2015-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420839060.8U Expired - Fee Related CN204348054U (en) | 2014-12-26 | 2014-12-26 | A kind of long-range liquid nitrogen level monitoring system based on GPRS |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106325336A (en) * | 2016-08-19 | 2017-01-11 | 广东锐捷安全技术股份有限公司 | Refrigeration and freshness preservation box control system |
| CN109374090A (en) * | 2018-10-23 | 2019-02-22 | 西南交通大学 | A kind of level monitoring system based on ultrasound |
| WO2020042402A1 (en) * | 2018-08-31 | 2020-03-05 | 武汉互创联合科技有限公司 | Liquid level monitoring device for built-in liquid nitrogen |
-
2014
- 2014-12-26 CN CN201420839060.8U patent/CN204348054U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106325336A (en) * | 2016-08-19 | 2017-01-11 | 广东锐捷安全技术股份有限公司 | Refrigeration and freshness preservation box control system |
| WO2020042402A1 (en) * | 2018-08-31 | 2020-03-05 | 武汉互创联合科技有限公司 | Liquid level monitoring device for built-in liquid nitrogen |
| CN109374090A (en) * | 2018-10-23 | 2019-02-22 | 西南交通大学 | A kind of level monitoring system based on ultrasound |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150520 Termination date: 20151226 |
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| EXPY | Termination of patent right or utility model |