CN203287078U - Liquid level transmitter and liquid level detecting system - Google Patents
Liquid level transmitter and liquid level detecting system Download PDFInfo
- Publication number
- CN203287078U CN203287078U CN2013201808295U CN201320180829U CN203287078U CN 203287078 U CN203287078 U CN 203287078U CN 2013201808295 U CN2013201808295 U CN 2013201808295U CN 201320180829 U CN201320180829 U CN 201320180829U CN 203287078 U CN203287078 U CN 203287078U
- Authority
- CN
- China
- Prior art keywords
- liquid level
- circuit
- fluid level
- level transmitter
- circuit board
- 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
Links
Images
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The utility model provides a liquid level transmitter and a liquid level detecting system. When the liquid level transmitter is used, a power circuit provides power for the liquid level transmitter, pressure input signals can be input through pressure input interfaces, various data can be connected with an automobile control module in a butt joint mode through a CAN communication interface, a signal detecting circuit is used for converting capacitive signals input by a liquid level sensor (300) into digital signals to be input into a processor, and a control part is modularized through the CAN bus technology so as to achieve centralized control. Therefore, the measurement on the liquid levels of gas bottles is more accurate, debugging can be more convenient to achieve, the product supply cycle is shortened, the universality is improved, and the after-sale cost is reduced.
Description
Technical field
The utility model relates to technical field of electronic equipment, especially relates to a kind of fluid level transmitter and liquid level detection system.
Background technology
Fluid level transmitter is mainly used in liquefied natural gas (LNG) (Liquefied Natural Gas, LNG) automobile industry, heavily block as LNG big bus, LNG etc., it is mainly used to convert the volume of LNG vehicle-mounted bottle the inside liquid to voltage or CAN bus digital signal, and the signal after changing is transferred to automobile control module.
If need the accurately volume of monitoring LNG gas cylinder internal liquid, at first need to transmitter carry out the empty bottle zeroing, a full bottle school completely arranges.Transmitter of the prior art is all that requirement bottle factory first measures the empty bottle capacitance, then this capacitance and bottle number are issued transmitter producer, again by transmitter producer will this bottle the capacitance input transducer and should bottle number write on transmitter and beam back a bottle factory, a bottle factory receives after transmitter to check the number one by one again transmitter is arranged on bottle and mails to depot again.Often can lead to errors in these links; for example: bottle factory is incorrect with the empty bottle measured capacitance value; transmitter producer does not correctly write transmitter with capacitance; bottle factory is not with transmitter and the corresponding bottle of mistake such as corresponding installation; so just caused the debugging trouble; delivery cycle is long, simultaneously service side's face is also pretty troublesome after sale, to impacting after sale.
The utility model content
The utility model provides a kind of fluid level transmitter and liquid level detection system, and it can realize that the gas cylinder level gauging is more accurate, debugs convenient.
The utility model proposes a kind of fluid level transmitter, comprising:
Drain pan, upper cover, circuit board;
Described circuit board is contained in the space that described drain pan and upper cover surround, and comprises processor, signal deteching circuit, pressure input interface, CAN communication interface, power circuit and key circuit on described circuit board;
Described signal deteching circuit is connected between the liquid level sensor of described processor and gas cylinder, the signal of described liquid level sensor input is changed in the described processor of rear input, and described power circuit, key circuit, pressure input interface, CAN communication interface all are connected with described processor.
Preferably, the key circuit of described fluid level transmitter comprises empty bottle button and full bottle button.
Preferably, also be provided with toggle switch on the described circuit board of described fluid level transmitter, described toggle switch is connected with described processor.
Preferably, be provided with analog output interface circuit on the described circuit board of described fluid level transmitter, described analog output interface circuit is connected with described processor.
Preferably, be provided with circuit delivery outlet and at least two circuit input holes on the described drain pan of described fluid level transmitter.
Preferably, be connected by screw between the described drain pan of described fluid level transmitter and upper cover, described circuit board is fixed by screws on the inwall of described drain pan.
The utility model also provides a kind of liquid level detection system, comprises liquid level sensor, also comprises fluid level transmitter as above.
as from the foregoing, the fluid level transmitter that the present embodiment provides in use, power circuit provides electric energy for fluid level transmitter, the pressure input interface can be accessed by the pressure input signal, the CAN communication interface can dock various data with automobile control module, signal deteching circuit is used for the capacitance signal of liquid level sensor input is transformed into the digital signal input processor, and with the CAN bussing technique with the control section modularization and then realize centralized control, make the gas cylinder level gauging more accurate, debug convenient, shortened the supply of material later stage, improve versatility, reduced spending after sale.
Description of drawings
Fig. 1 is the structural representation of the fluid level transmitter that provides of the utility model;
Fig. 2 is the schematic diagram of the upper cover of the fluid level transmitter that provides of the utility model;
Fig. 3 is the structural representation of circuit board in the fluid level transmitter that provides of the utility model.
The realization of the utility model purpose, functional characteristics and advantage, in connection with embodiment, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Referring to Fig. 1-3, Fig. 1 is the structural representation of the fluid level transmitter that provides of the utility model, and Fig. 2 is the schematic diagram of the upper cover of the fluid level transmitter that provides of the utility model, and Fig. 3 is the structural representation of the circuit board of the fluid level transmitter that provides of the utility model.
As shown in the figure, the fluid level transmitter that the utility model provides comprises: drain pan 10, upper cover 30, circuit board 20(Fig. 1 do not show), wherein, described circuit board 20 is contained in the space that described drain pan 10 and upper cover 30 surround, and comprises processor 21, signal deteching circuit 22, pressure input interface 27, CAN communication interface 24, power circuit 23 and key circuit 25 on described circuit board 20.
Described signal deteching circuit 22 is connected between the liquid level sensor 300 of described processor 21 and gas cylinder, and described power circuit 23, key circuit 25, pressure input interface 27, CAN communication interface 24 all are connected with described processor 21.Wherein, key circuit 25 comprises empty bottle button and full bottle button, and then realizes vehicle-mounted bottle is carried out empty bottle, full bottle calibration.
the fluid level transmitter that the present embodiment provides in use, power circuit 23 provides electric energy for fluid level transmitter, the accessible pressure input signal of pressure input interface 27, CAN communication interface 24 can dock various data with automobile control module, signal deteching circuit 21 is used for the capacitance signal of liquid level sensor 300 inputs is transformed into digital signal input processor 21, and with the can bussing technique with the control section modularization and then realize centralized control, make the gas cylinder level gauging more accurate, debug convenient, shortened the supply of material later stage, improve versatility, reduced spending after sale.
Continuation is referring to Fig. 1, being provided with two circuit input holes 13 and circuit delivery outlet 14 on the described drain pan 10 of the fluid level transmitter that the utility model provides can be protruding by circuit delivery outlet 14, and the pressure input signal cable can be inner by circuit input hole 13 input fluid level transmitters.
In the utility model embodiment, be connected by screw between drain pan 10 and upper cover 30, on cover and be provided with corresponding screw hole 31, described circuit board 20 is fixed on the inwall of described drain pan 10 by screw 11.
Continuation is referring to Fig. 3, and the circuit board 20 of the fluid level transmitter that the utility model provides also is provided with analog output interface circuit 28, and analog output interface circuit 28 is connected with described processor 21, and it is used for the analog quantity formal output of the level value in vehicle-mounted bottle with 0-4.2V.
In addition, also be provided with toggle switch 26 on circuit board 20, toggle switch 26 is connected with described processor 21, and toggle switch 26 is used for arranging the numbering of vehicle-mounted bottle.
In sum, with fluid level transmitter of the prior art, compare, the fluid level transmitter that the utility model provides has following advantage:
1. need not corresponding bottle number, need not independent measurement device gas cylinder capacitance, adopt capacitor design on a large scale, during debugging, only need press correcting button after switching on power and namely complete empty bottle, full bottle setting;
2. transmitter can directly be measured the capacitance of vehicle-mounted bottle inside liquid level sensor, can monitor at any time and consult current capacitance;
3. while outputting analog signal and CAN bus digital signal, export 0V when the analog signal output scope is 0-4.2V(empty bottle, output 4.2V during full bottle), can connect the automobile oil gauge needle dial; The can bus signals directly docks with automobile control module, shows liquid level, pressure and other parameters on automobile control module;
4., with 2 pressure interfaces, can receive storage pressure and buffering pressure tank;
5. the gas cylinder numbering manually is set, 1-4 gas cylinder can be set;
6. temperature compensation function, the transmitter built-in temperature is measured and compensation software, when temperature changes, remains the precision of measurement;
7. compatible strong, 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.
The utility model also provides a kind of liquid level detection system finally, comprises liquid level sensor and fluid level transmitter as above.Liquid level detection system can use the can bussing technique with the control section modularization and then realize centralized control, makes the gas cylinder level gauging more accurate, debugs conveniently, has shortened the supply of material later stage, improves versatility, has reduced spending after sale.
Should be understood that; these are only preferred embodiment of the present utility model; can not therefore limit the scope of the claims of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model instructions and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present utility model.
Claims (6)
1. a fluid level transmitter, is characterized in that, comprises drain pan, upper cover, circuit board;
Described circuit board is contained in the space that described drain pan and upper cover surround, and comprises processor, signal deteching circuit, pressure input interface, CAN communication interface, power circuit and key circuit on described circuit board;
Described signal deteching circuit is connected between the liquid level sensor of described processor and gas cylinder, the signal of described liquid level sensor input is changed in the described processor of rear input, and described power circuit, key circuit, pressure input interface, CAN communication interface all are connected with described processor.
2. fluid level transmitter according to claim 1, is characterized in that,
Described key circuit comprises empty bottle button and full bottle button.
3. fluid level transmitter according to claim 2, is characterized in that,
Also be provided with toggle switch on described circuit board, described toggle switch is connected with described processor.
4. fluid level transmitter according to claim 2, is characterized in that, is provided with analog output interface circuit on described circuit board, and described analog output interface circuit is connected with described processor.
5., according to claim 1 to the 4 described fluid level transmitters of any one, it is characterized in that,
Be connected by screw between described drain pan and upper cover, described circuit board is fixed by screws on the inwall of described drain pan.
6. a liquid level detection system, comprise liquid level sensor, it is characterized in that, also comprises fluid level transmitter as described in claim 1 to 5 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201808295U CN203287078U (en) | 2013-04-12 | 2013-04-12 | Liquid level transmitter and liquid level detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201808295U CN203287078U (en) | 2013-04-12 | 2013-04-12 | Liquid level transmitter and liquid level detecting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203287078U true CN203287078U (en) | 2013-11-13 |
Family
ID=49543435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013201808295U Expired - Fee Related CN203287078U (en) | 2013-04-12 | 2013-04-12 | Liquid level transmitter and liquid level detecting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203287078U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215297A (en) * | 2014-09-03 | 2014-12-17 | 永康市兰雪龙智能科技有限公司 | LNG (liquefied natural gas) vehicle-carried gas cylinder integrated transmitter structure |
| CN104500973A (en) * | 2014-11-05 | 2015-04-08 | 江南工业集团有限公司 | Vehicle-mounted liquefied-natural-gas cylinder liquid level display instrument |
-
2013
- 2013-04-12 CN CN2013201808295U patent/CN203287078U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215297A (en) * | 2014-09-03 | 2014-12-17 | 永康市兰雪龙智能科技有限公司 | LNG (liquefied natural gas) vehicle-carried gas cylinder integrated transmitter structure |
| CN104500973A (en) * | 2014-11-05 | 2015-04-08 | 江南工业集团有限公司 | Vehicle-mounted liquefied-natural-gas cylinder liquid level display instrument |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201352162Y (en) | Transformer temperature calibration device | |
| CN101113934A (en) | Intelligent capacitance differential pressure cell and method | |
| CN103257277B (en) | Multifunctional virtual instrument based on constant flow source and control method | |
| CN102998645A (en) | Impulse voltage standard wave source for high-voltage impulse voltage quantity value traceability and using method thereof | |
| CN204881791U (en) | A capacity calibrating installation that is used for car tank wagon oil to exchange | |
| CN203287078U (en) | Liquid level transmitter and liquid level detecting system | |
| CN106370273A (en) | Automobile fuel tank fuel capacity calibration system and calibration method | |
| CN208847781U (en) | A kind of artificial multimeter | |
| CN205986894U (en) | Receiver power calibrating device awaits measuring | |
| CN203116801U (en) | Liquid level metering device of liquefied natural gas (LNG) heavy duty truck | |
| CN203163823U (en) | Liquid level transmitter for liquefied natural gas | |
| CN203133260U (en) | Impulse voltage standard wave source for high-voltage impulse voltage quantity value traceability | |
| CN101187805A (en) | Storage battery intelligent detection and control device and method | |
| CN203396448U (en) | Liquid level display and liquid level detection system | |
| CN202794340U (en) | High-voltage digital type insulation resistance tester | |
| CN203534694U (en) | Remote-control digital weighing machine with temperature compensation function | |
| CN103234617A (en) | Remote-control digital weighing machine with temperature compensation function and temperature compensation method for remote-control digital weighing machine | |
| CN201081742Y (en) | Flow integrating instrument | |
| CN210775818U (en) | On-site calibration device for ship electrical instrument | |
| CN201373730Y (en) | Capacitance grating type digital-display misalignment value measuring instrument | |
| CN103575997A (en) | High-voltage digital insulation resistance tester | |
| CN203849394U (en) | An automatic calibrating apparatus of a digital multimeter | |
| CN202582655U (en) | Electronic liquid level meter | |
| CN207763884U (en) | A kind of Portable pressure transmitter detection device | |
| CN201662419U (en) | Capacitance type fluid level indicator |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131113 Termination date: 20180412 |