CN203163823U - Liquid level transmitter for liquefied natural gas - Google Patents
Liquid level transmitter for liquefied natural gas Download PDFInfo
- Publication number
- CN203163823U CN203163823U CN 201320092426 CN201320092426U CN203163823U CN 203163823 U CN203163823 U CN 203163823U CN 201320092426 CN201320092426 CN 201320092426 CN 201320092426 U CN201320092426 U CN 201320092426U CN 203163823 U CN203163823 U CN 203163823U
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- CN
- China
- Prior art keywords
- natural gas
- liquefied natural
- level transmitter
- lng
- fluid level
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The utility model discloses a liquid level transmitter for a liquefied natural gas. The liquid level transmitter comprises a processor, a signal detection circuit, an empty bottle calibration button, a full bottle calibration button, a dial switch, an analog signal output interface and an analog signal input interface, wherein the signal detection circuit, the empty bottle calibration button, the full bottle calibration button, the dial switch, the analog signal output interface and the analog signal input interface are connected with the processor. The liquid level transmitter can directly measure the capacitance of a liquid level sensor in each bottle without corresponding to the number of the bottle, the capacitance does not need to be individually measured, an empty bottle can be calibrated only by pressing the empty bottle calibration button after a power supply is switched on during debugging, the problem that the liquid level transmitter mistakenly corresponds to a gas bottle is avoided, accordingly, debugging is more convenient and accurate, and measuring accuracy is improved.
Description
Technical field
The utility model relates to a kind of fluid level transmitter, relates in particular to a kind of fluid level transmitter of liquefied natural gas (LNG).
Background technology
To accurately monitor the volume of liquefied natural gas (LNG) gas cylinder internal liquid, at first to carry out empty bottle zeroing to transmitter, a full bottle school completely arranges, transmitter in the past all is that requirement bottle factory measures the empty bottle capacitance earlier, then this capacitance and bottle number are issued transmitter producer, again by liquid level gauge producer will this bottle the capacitance input transducer and should bottle number write on and beam back a bottle factory on the transmitter, a bottle factory receives to check the number one by one behind the transmitter transmitter is installed in again and mails to depot on the bottle again.In these links, lead to errors through regular meeting; for example: bottle factory is incorrect with the empty bottle measured capacitance value; liquid level gauge producer does not correctly write transmitter with capacitance; bottle factory is not with transmitter and the corresponding installation of corresponding bottle etc. mistake; so just caused the debugging trouble; delivery cycle is long, and is simultaneously also pretty troublesome aspect service after sale, to having caused very big spending after sale.
The utility model content
At the problems referred to above, the utility model purpose is to provide a kind of liquefied natural gas (LNG) fluid level transmitter, can directly debug, directly arrange the gas cylinder numbering, and compatible strong.
To achieve these goals, the utility model provides a kind of liquefied natural gas (LNG) fluid level transmitter, comprise processor, and the signal deteching circuit that is connected with processor, empty bottle calibration knob, a full bottle calibration knob, processor, analog signal output interface, analog input interface.
According to described liquefied natural gas (LNG) fluid level transmitter, described analog input interface is used for receiving pressure signal; Analog signal output interface is exported level value in the vehicle-mounted gas cylinder with the voltage analog signal form; Signal deteching circuit is for detection of the capacitance signal of sensor output, and capacitance signal is transformed into the digital signal input processor.
According to described liquefied natural gas (LNG) fluid level transmitter, described analog input interface has two, is respectively applied to receive liquefied natural gas (LNG) storage pressure and buffering bottle pressure.
According to described liquefied natural gas (LNG) fluid level transmitter, described fluid level transmitter also comprises communication interface, is used for various data and external unit are exchanged.
According to described liquefied natural gas (LNG) fluid level transmitter, described communication interface is the Rs485 interface, can realize that far-end obtains measurement data in real time by the Rs485 interface.
According to described liquefied natural gas (LNG) fluid level transmitter, described analog input interface is 4-20mA current analog signal input interface.
According to described liquefied natural gas (LNG) fluid level transmitter, described analog signal output interface is the voltage analog signal output interface, described voltage analog signal output interface is 0-4.2V voltage analog signal output interface, and described output interface is connected with Displaying Meter.
According to described liquefied natural gas (LNG) fluid level transmitter, described Displaying Meter is the automobile oil gauge needle dial.
According to described liquefied natural gas (LNG) fluid level transmitter, described fluid level transmitter also comprises toggle switch, is used for arranging the numbering of liquefied natural gas (LNG) gas cylinder.
The liquefied natural gas (LNG) fluid level transmitter that the utility model provides, can directly measure the capacitance of the liquid level sensor in the bottle, need not corresponding bottle number, need not the independent measurement capacitance, during debugging, only need press calibration knob behind the connection power supply and namely finish the empty bottle calibration, the debugging back directly arranges the gas cylinder numbering by toggle switch, the corresponding wrong situation with gas cylinder of fluid level transmitter can not occur, thereby make debugging more convenient accurately, improve the accuracy of measuring.
The fluid level transmitter that the utility model provides adopts capacitor design on a large scale, and is compatible strong, and the transmitter measurement range is wide, gas cylinder that can compatible all size and liquid level sensor capacitance, installation site, the gas cylinder signal wire joint of other producers.
Description of drawings
Fig. 1 is the utility model embodiment liquefied natural gas (LNG) fluid level transmitter schematic block circuit diagram.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
As shown in Figure 1, the liquefied natural gas (LNG) fluid level transmitter 2 of present embodiment comprises processor 11, and the signal deteching circuit 12 that is connected with processor 11, empty bottle calibration knob 13, a full bottle calibration knob 14, analog signal output interface 16, analog input interface 17, and the power supply 19 of giving transmitter 2 each elements power supply.
Because liquefied natural gas (LNG) fluid level transmitter 2 has empty bottle calibration knob 13, full bottle calibration knob 14, can directly debug gas cylinder, liquefied natural gas (LNG) fluid level transmitter 2 connects liquid level sensor 1, directly test the empty bottle capacitance, and finish empty bottle by empty bottle calibration knob 13 and calibrate, in like manner can finish full bottle by full bottle calibration knob 14 and arrange, need not to test separately the empty bottle capacitance and send it to transmitter producer, make debugging more directly simple.
Wherein signal deteching circuit 12 is connected with liquid level sensor 1 in the gas cylinder, because after liquefied natural gas (LNG) enters liquid level sensor 1, the capacitance of liquid level sensor 1 can change, this variation is proportional with the height that enters liquid level sensor 1 liquid, liquefied natural gas (LNG) fluid level transmitter 2 is exported in the mode of simulating signal this proportional relation by output circuit, in the present embodiment, signal deteching circuit 12 is transformed into digital signal input processor 11 with the capacitance signal of liquid level sensor 1 input, processor 11 is transformed into digital signal the simulating signal of voltage form through processing, then by analog signal output interface 16 outputs, the preferred 0-4.2V voltage analog signal of present embodiment output interface is with the voltage analog signal form output of the level value in the vehicle-mounted bottle with 0-4.2V, the simulating signal output area is 0-4.2V, output 0V during empty bottle, output 4.2V in the time of full bottle, output interface is connected with Displaying Meter, the height that shows liquid level in the liquefied natural gas (LNG) gas cylinder, be applied on the automobile, can be connected with the oil meter needle dial of automobile, make the driver and conductor conveniently check the storage of liquefied natural gas (LNG) in the gas cylinder.
Analog quantity input interface 17 has two input interfaces, can receive liquefied natural gas (LNG) storage pressure and buffering pressure tank signal, the preferred 4-20mA current analog signal of present embodiment input interface.
As preferably, liquefied natural gas (LNG) fluid level transmitter 2 comprises toggle switch 15, can the gas cylinder numbering directly manually be set by toggle switch 15, carry out the dial-up numbering after sensor in liquefied natural gas (LNG) fluid level transmitter 2 and liquefied natural gas (LNG) gas cylinder connects again, the corresponding wrong phenomenon with the liquefied natural gas (LNG) gas cylinder of liquefied natural gas (LNG) fluid level transmitter 2 so just can not occur.
As preferably, liquefied natural gas (LNG) fluid level transmitter 2 further comprises communication interface 18, and the present embodiment communication interface adopts the Rs485 interface, and the Rs485 interface can be combined with display, the height of liquid level, pressure, capacitance etc. are conveniently monitored in real time to liquid condition in the gas cylinder in the demonstration gas cylinder.
The fluid level transmitter that the utility model provides, can directly measure the capacitance of the liquid level sensor in the bottle, need not corresponding bottle number, need not the independent measurement capacitance, during debugging, only need press the empty bottle correcting button behind the connection power supply and namely finish the empty bottle calibration, the debugging back directly arranges the gas cylinder numbering by toggle switch, the corresponding wrong situation with gas cylinder of fluid level transmitter can not occur, thereby make debugging more convenient accurately, improve the accuracy of measuring.
The utility model can also have other various embodiments; under the situation that does not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the utility model.
Claims (8)
1. a liquefied natural gas (LNG) fluid level transmitter is characterized in that, comprises processor, and the signal deteching circuit that is connected with processor, empty bottle calibration knob, a full bottle calibration knob, analog signal output interface, analog input interface.
2. liquefied natural gas (LNG) fluid level transmitter according to claim 1 is characterized in that, described analog input interface has two, is respectively applied to receive liquefied natural gas (LNG) storage pressure and buffering pressure tank.
3. liquefied natural gas (LNG) fluid level transmitter according to claim 1 is characterized in that, described fluid level transmitter also comprises communication interface, is used for various data and external unit are exchanged.
4. liquefied natural gas (LNG) fluid level transmitter according to claim 3 is characterized in that, described communication interface is the Rs485 interface.
5. liquefied natural gas (LNG) fluid level transmitter according to claim 1 is characterized in that, described analog input interface is 4-20mA current analog signal input interface.
6. liquefied natural gas (LNG) fluid level transmitter according to claim 1 is characterized in that, described analog signal output interface is 0-4.2V voltage analog signal output interface, and described output interface is connected with Displaying Meter.
7. liquefied natural gas (LNG) fluid level transmitter according to claim 6 is characterized in that, described Displaying Meter is the automobile oil gauge needle dial.
8. liquefied natural gas (LNG) fluid level transmitter according to claim 1 is characterized in that, described fluid level transmitter also comprises toggle switch, is used for arranging the numbering of liquefied natural gas (LNG) gas cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320092426 CN203163823U (en) | 2013-02-28 | 2013-02-28 | Liquid level transmitter for liquefied natural gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320092426 CN203163823U (en) | 2013-02-28 | 2013-02-28 | Liquid level transmitter for liquefied natural gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203163823U true CN203163823U (en) | 2013-08-28 |
Family
ID=49025001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320092426 Expired - Fee Related CN203163823U (en) | 2013-02-28 | 2013-02-28 | Liquid level transmitter for liquefied natural gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203163823U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104044463A (en) * | 2014-06-04 | 2014-09-17 | 三一汽车制造有限公司 | Instrument device and engineering vehicle |
| CN104697604A (en) * | 2015-03-13 | 2015-06-10 | 湖南菲尔斯特传感器有限公司 | Capacitor liquid level sensor allowing site calibration |
| CN106370350A (en) * | 2016-08-22 | 2017-02-01 | 绵阳高新区恒奥电子科技有限公司 | Integrated sound-and-light alarm device and leakage detection system |
-
2013
- 2013-02-28 CN CN 201320092426 patent/CN203163823U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104044463A (en) * | 2014-06-04 | 2014-09-17 | 三一汽车制造有限公司 | Instrument device and engineering vehicle |
| CN104697604A (en) * | 2015-03-13 | 2015-06-10 | 湖南菲尔斯特传感器有限公司 | Capacitor liquid level sensor allowing site calibration |
| CN106370350A (en) * | 2016-08-22 | 2017-02-01 | 绵阳高新区恒奥电子科技有限公司 | Integrated sound-and-light alarm device and leakage detection system |
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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: 20130828 Termination date: 20180228 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |