CN202221329U - Low temperature liquid level sensor component - Google Patents
Low temperature liquid level sensor component Download PDFInfo
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- CN202221329U CN202221329U CN2011203521801U CN201120352180U CN202221329U CN 202221329 U CN202221329 U CN 202221329U CN 2011203521801 U CN2011203521801 U CN 2011203521801U CN 201120352180 U CN201120352180 U CN 201120352180U CN 202221329 U CN202221329 U CN 202221329U
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- liquid level
- low temperature
- level sensor
- temperature liquid
- support bar
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Abstract
The utility model discloses a low temperature liquid level sensor component. When the low temperature liquid level sensor component is in use, one end of the low temperature liquid level sensor component is positioned in low temperature liquid, and the other end of the low temperature liquid level sensor component is positioned outside the low temperature liquid. The sensor component comprises a support rod, a plurality of temperature sensors and a plurality of signal transmission lines. The end of the support rod, which is positioned in the low temperature liquid when the sensor component is in use, is used as a lower end; and the end of the support rod, which is positioned outside the low temperature liquid when the sensor component is in use, is used as an upper end. The temperature sensors are sequentially distributed on the outer surface of the support rod from bottom to top. Signal output ends of the temperature sensors are correspondingly connected with one ends of the signal transmission lines in a one-to-one way. The other ends of the signal transmission lines are led out along the support rod from bottom to top. When the low temperature liquid level sensor component is used to measure the liquid level of the low temperature liquid, the signal transmission lines are externally connected with a central processor, the temperature sensors can transmit temperature difference signals that whether the temperature sensors are soaked in the liquid or not to the central processor through the signal transmission lines, and the central processor can judge the liquid level very accurately according to the positions of the temperature sensors.
Description
Technical field
The utility model relates to a kind of low temperature liquid level sensor, relates in particular to a kind of low temperature liquid level sensor assembly that utilizes a plurality of temperature sensors to realize accurately measuring the cryogenic liquid liquid level.
Background technology
The low temperature liquid level sensor is used to measure the liquid level of cryogenic liquid such as liquid nitrogen, and important effect is arranged in low-temperature test, is that processes such as assurance scientific research and testing and commercial production are normally carried out requisite instrument.
At present; The method that is used to measure the cryogenic liquid liquid level has a lot; Mainly comprise thermal oscillation, superconduction collimation method, electric-resistivity method, diode method and capacitance method or the like, as in the 24th volume second phase of " low temperature and superconduction " May in 1996 about " germanium diode high resolving power low temperature liquid level gauge " literary composition, describe the structure and the principle of work of germanium diode liquid level gauge in detail; The difference of the heat-transfer capability when utilizing the germanium diode conduction in liquid and gas changes; Cause that its forward voltage changes, show that being in the liquid still is outside the liquid thereby judge germanium diode, and therefore judge the height of liquid level.And for example " guided missile and carrying space technology " 2008 the 6th is interim about " low temperature liquid level gauge " literary composition; The structure and the principle of work of tandem capacitive liquid level sensor have been described; The medium specific inductive capacity of electric capacity changed when it utilized liquid level change; The principle that finally causes liquid level gauge output capacitance value to change is come the height of measuring liquid level, be a plurality of little electric capacity are arranged in the difference of traditional capacitance liquid level sensor, has reduced the influence to capacitance of liquid, gas two media.2-1 is interim about " research of a low temperature liquid level emasuring device " literary composition for 2007 the 23rd volumes of " microcomputer information " for another example (observing and controlling robotization); Introduced stepper motor and the method for the common measuring liquid level of controller of utilizing level probe, control probe, utilize probe in liquid with liquid outside different impedance feature measurement liquid level.
In above-mentioned all methods; All be to utilize the difference of the inside and outside conductive characteristic of cryogenic liquid or thermal conduction characteristic or resistance, capacitance characteristic to reach the purpose of judging liquid level; Its defective is: because above-mentioned each property difference of the both sides of liquid critical surface is limited; So no matter how to change sensor itself, all be difficult to bigger breakthrough aspect the liquid level side measuring accuracy.
Summary of the invention
The purpose of the utility model just is that providing a kind of in order to address the above problem utilizes a plurality of temperature sensors to realize the accurately low temperature liquid level sensor assembly of measurement cryogenic liquid liquid level.
The utility model is realized above-mentioned purpose through following technical scheme:
When the utility model used, the one of which end was positioned at cryogenic liquid, the other end is positioned at outside the cryogenic liquid, and the utility model comprises a support bar, several temperature sensors and several signal transmssion lines; The end that said support bar is positioned at cryogenic liquid when using with the utility model as the lower end, to be positioned at the outer end of cryogenic liquid be the upper end; Said temperature sensor from bottom to top is distributed in the outside surface of said support bar successively; One end of the signal output part of said temperature sensor and said signal transmssion line connects one to one, and the other end of said signal transmssion line is from bottom to top drawn along said support bar.
The principle of the utility model is to utilize the temperature variation of cryogenic liquid medium under gas, liquid two states to detect its liquid level.With respect to traditional liquid level detection device; The utility model is the breakthrough of a matter; Because the utility model temperature sensor detected is the temperature contrast of cryogenic liquid medium on the critical point both sides of gas, liquid two states; Can know according to material gas, liquid switch condition, if be liquid state, the then certain subcritical point temperature of temperature; If be gaseous state, then temperature necessarily is higher than critical point temperature.So; Can judge necessarily that according to the detected temperature of temperature sensor liquid environment that this temperature sensor is in medium still is in the gaseous environment; And the height of each temperature sensor is confirmed, so just can accurately judge the liquid level of cryogenic liquid.Certainly, the analysis of carrying out liquid level according to the signal of temperature sensor is to be accomplished by the central processing unit that is connected with several signal transmssion lines of the utility model with judgement, electronics integrated with programmed control highly developed today, this is not the thing of difficulty.
Further, be provided with the sensor groove with the corresponding position of said temperature sensor on the said support bar, said temperature sensor is positioned at said sensor groove, is convenient to the management of whole assembly like this, also makes the installation of temperature sensor simpler; Said temperature sensor is the RTD array, and RTD is the abbreviation of platinum resistance thermometer sensor,, and its resistance can change along with variation of temperature, and its variation is very accurate, so its testing result is also very accurate; Distance between the adjacent said temperature sensor is 1-20mm, and according to actual needs measuring accuracy is confirmed in the application.
Further, be provided with the transmission line groove with the corresponding position of said signal transmssion line on the said support bar, said signal transmssion line is positioned at said transmission line groove; It is a branch of that all said signal transmssion lines are concentrated colligation, from bottom to top draws along said support bar.Be convenient to the management of whole assembly like this, also make the installation of signal transmssion line simpler.
Further, said support bar is a Metallic rod, and its good physical property makes it can satisfy very big difference variation requirement.
The beneficial effect of the utility model is:
When measuring the liquid level of cryogenic liquid with the utility model; The external central processing unit of signal transmssion line; Temperature sensor can be transferred to central processing unit to soaked with liquid whether temperature signal through signal transmssion line, and central processing unit can very accurately go out the height of liquid level according to the position judgment of temperature sensor.Because the utility model is that the temperature difference of utilizing the cryogenic liquid medium under gas, liquid two states, to certainly exist is judged liquid level, so its error is quite little, precision is very high, is a much progress in cryogenic liquid level gauging field.
Description of drawings
Accompanying drawing is the main TV structure synoptic diagram of the utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further:
Shown in accompanying drawing, the utility model comprises a support bar 2, several temperature sensors 3 and several signal transmssion lines 4; To be arranged in lower end that an end of cryogenic liquid schemes as the lower end, to be arranged in the outer end of cryogenic liquid be the upper end of upper end figure to support bar 2 when using with the utility model; Temperature sensor 3 from bottom to top is distributed in the outside surface of support bar 2 successively; One end of the signal output part of temperature sensor 3 and signal transmssion line 4 connects one to one, and the other end of signal transmssion line 4 is from bottom to top drawn along said support bar.
Shown in accompanying drawing; Be provided with sensor groove (because of bad mark, so not shown) with temperature sensor 3 corresponding positions on the support bar 2, temperature sensor 3 is positioned at said sensor groove; Be convenient to the management of whole assembly like this, also make the installation of temperature sensor 3 simpler; Temperature sensor 3 is the RTD array, and RTD is the abbreviation of platinum resistance thermometer sensor,, and its resistance can change along with variation of temperature, and its variation is very accurate, so its testing result is also very accurate; Distance between the adjacent temperature sensor 3 is 1-20mm, and according to actual needs measuring accuracy is confirmed in the application.
Shown in accompanying drawing, be provided with transmission line groove (because of bad mark, so not shown) with signal transmssion line 4 corresponding positions on the support bar 2, signal transmssion line 4 is positioned at said transmission line groove; It is a branch of transmission line group 1 that becomes that all signal transmssion lines 4 are concentrated colligation, from bottom to top draws along support bar 2.Be convenient to the management of whole assembly like this, also make the installation of signal transmssion line simpler.
Shown in accompanying drawing, support bar 2 is a Metallic rod, and its good physical property makes it can satisfy very big difference variation requirement.
In conjunction with accompanying drawing; When the utility model uses; Its lower end is positioned at cryogenic liquid, the upper end is positioned at outside the cryogenic liquid, and transmission line group 1 is drawn from the upper end, and several signal transmssion lines 4 in the transmission line group 1 connect one to one with the transducing signal input end of central processing unit (not shown) respectively.The principle of the utility model is to utilize the temperature variation of cryogenic liquid medium under gas, liquid two states to detect its liquid level, can know according to material gas, liquid switch condition, if be liquid state, the then certain subcritical point temperature of temperature; If be gaseous state, then temperature necessarily is higher than critical point temperature.So; Can judge necessarily that according to temperature sensor 3 detected temperature liquid environment that this temperature sensor 3 is in medium still is in the gaseous environment; And the height of each temperature sensor 3 is confirmed, so just can accurately judge the liquid level of cryogenic liquid.
Claims (8)
1. low temperature liquid level sensor assembly, during use, the one of which end is positioned at cryogenic liquid, the other end is positioned at outside the cryogenic liquid, it is characterized in that: said sensor module comprises a support bar, several temperature sensors and several signal transmssion lines; The end that said support bar is positioned at cryogenic liquid when using with said sensor module as the lower end, to be positioned at the outer end of cryogenic liquid be the upper end; Said temperature sensor from bottom to top is distributed in the outside surface of said support bar successively; One end of the signal output part of said temperature sensor and said signal transmssion line connects one to one, and the other end of said signal transmssion line is from bottom to top drawn along said support bar.
2. low temperature liquid level sensor assembly according to claim 1 is characterized in that: be provided with the sensor groove with the corresponding position of said temperature sensor on the said support bar, said temperature sensor is positioned at said sensor groove.
3. low temperature liquid level sensor assembly according to claim 1 and 2 is characterized in that: said temperature sensor is the RTD array.
4. low temperature liquid level sensor assembly according to claim 3 is characterized in that: the distance between the adjacent said temperature sensor is 1-20mm.
5. low temperature liquid level sensor assembly according to claim 1 and 2 is characterized in that: the distance between the adjacent said temperature sensor is 1-20mm.
6. low temperature liquid level sensor assembly according to claim 1 is characterized in that: be provided with the transmission line groove with the corresponding position of said signal transmssion line on the said support bar, said signal transmssion line is positioned at said transmission line groove.
7. according to claim 1 or 6 described low temperature liquid level sensor assemblies, it is characterized in that: it is a branch of that all said signal transmssion lines are concentrated colligation, from bottom to top draws along said support bar.
8. according to claim 1,2 or 6 described low temperature liquid level sensor assemblies, it is characterized in that: said support bar is a Metallic rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203521801U CN202221329U (en) | 2011-09-20 | 2011-09-20 | Low temperature liquid level sensor component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203521801U CN202221329U (en) | 2011-09-20 | 2011-09-20 | Low temperature liquid level sensor component |
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| Publication Number | Publication Date |
|---|---|
| CN202221329U true CN202221329U (en) | 2012-05-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011203521801U Expired - Lifetime CN202221329U (en) | 2011-09-20 | 2011-09-20 | Low temperature liquid level sensor component |
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| CN (1) | CN202221329U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928043A (en) * | 2012-10-30 | 2013-02-13 | 东南大学 | Material level detection method based on linear array temperature sensor |
| GB2525142A (en) * | 2013-11-19 | 2015-10-21 | Radio Data Networks Ltd | A method & apparatus for detecting and measuring the level of liquid within a channel |
| TWI588452B (en) * | 2014-12-02 | 2017-06-21 | Fujikin Kk | Liquid level detecting circuit, liquid level meter, container having the same, and vaporizer using the same |
| CN107091667A (en) * | 2017-05-08 | 2017-08-25 | 哈尔滨工大兴科电子科技有限公司 | The liquid level detection system that a kind of use temperature sensor is realized |
| CN111551232A (en) * | 2020-06-30 | 2020-08-18 | 广东省特种设备检测研究院东莞检测院 | Vacuum tube type temp. difference liquid level meter |
| CN111947027A (en) * | 2020-07-31 | 2020-11-17 | 广东省特种设备检测研究院东莞检测院 | Low-temperature liquefied gas level measuring method |
-
2011
- 2011-09-20 CN CN2011203521801U patent/CN202221329U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928043A (en) * | 2012-10-30 | 2013-02-13 | 东南大学 | Material level detection method based on linear array temperature sensor |
| CN102928043B (en) * | 2012-10-30 | 2015-01-28 | 东南大学 | Material level detection method based on linear array temperature sensor |
| GB2525142A (en) * | 2013-11-19 | 2015-10-21 | Radio Data Networks Ltd | A method & apparatus for detecting and measuring the level of liquid within a channel |
| GB2525142B (en) * | 2013-11-19 | 2018-04-18 | Radio Data Networks Ltd | A method & apparatus for detecting and measuring the level of liquid within a channel |
| TWI588452B (en) * | 2014-12-02 | 2017-06-21 | Fujikin Kk | Liquid level detecting circuit, liquid level meter, container having the same, and vaporizer using the same |
| CN107091667A (en) * | 2017-05-08 | 2017-08-25 | 哈尔滨工大兴科电子科技有限公司 | The liquid level detection system that a kind of use temperature sensor is realized |
| CN111551232A (en) * | 2020-06-30 | 2020-08-18 | 广东省特种设备检测研究院东莞检测院 | Vacuum tube type temp. difference liquid level meter |
| CN111947027A (en) * | 2020-07-31 | 2020-11-17 | 广东省特种设备检测研究院东莞检测院 | Low-temperature liquefied gas level measuring method |
| CN111947027B (en) * | 2020-07-31 | 2022-03-18 | 广东省特种设备检测研究院东莞检测院 | Low-temperature liquefied gas level measuring method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SICHUAN SHENGJIE CRYOGENIC EQUIPMENT CO., LTD. Free format text: FORMER NAME: CHENGDU SHENGJIE CRYOGENIC EQUIPMENT CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 610045, Sichuan City, Chengdu province Wenjiang Liu town and Ning street, No. 2 busy times Patentee after: Sichuan is contained outstanding cyrogenic equipment and is manufactured Company Limited by Shares Address before: 610045, Sichuan City, Chengdu province Wenjiang Liu town and Ning street, No. 2 busy times Patentee before: Chengdu Sheng Jie Cryo Equipment Co., Ltd |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171219 Address after: 610000 Sichuan province Chengdu city Wenjiang District Chengdu Strait science and Technology Industrial Development Park section of the east section of the east section of the East Patentee after: Sichuan Haisheng Jie low temperature technology Ltd. Address before: 610045, Sichuan City, Chengdu province Wenjiang Liu town and Ning street, No. 2 busy times Patentee before: Sichuan is contained outstanding cyrogenic equipment and is manufactured Company Limited by Shares |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120516 |