CN202853691U - Digital input type level transmitter - Google Patents
Digital input type level transmitter Download PDFInfo
- Publication number
- CN202853691U CN202853691U CN 201220360446 CN201220360446U CN202853691U CN 202853691 U CN202853691 U CN 202853691U CN 201220360446 CN201220360446 CN 201220360446 CN 201220360446 U CN201220360446 U CN 201220360446U CN 202853691 U CN202853691 U CN 202853691U
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- level transmitter
- signal
- pressure sensor
- modular converter
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Abstract
The utility model discloses a digital input type level transmitter which comprises a pressure sensor module. The digital input type level transmitter further comprises a signal amplification and conversion module, a micro controller unit (MCU) controlling and processing module, a current output module, a communication module and a display and key operation module. The pressure sensor module is of a all welded structure, the pressure sensor module is connected with the signal amplification and conversion module, the signal amplification and conversion module is connected with the MCU controlling and processing module, the MCU controlling and processing module is connected with the current output module, the communication module and the display and key operation module respectively. The digital input type level transmitter has the advantages that the pressure sensor module is of an all welded structure, so that liquid is prevented from seeping into a pressure sensor effectively and tightness of products is improved. Analog signal is realized by the signal amplification and conversion module, and products stability and anti-interference performance is improved. The display and key operation module can display level value and revise the parameter on site. The communication module is capable of communicating with an upper computer and the like.
Description
Technical field
The utility model relates to a kind of liquid level proving installation, especially relates to a kind of fluid level transmitter.
Background technology
The throw-in type fluid level transmitter is that a kind of will the probe directly dropped in the liquid, measures the mode of liquid level by the fluid pressure of measuring sonde position.The pass of this pressure and liquid level is: h=k * P; H is liquid level, and k is coefficient (density that depends on liquid), and P is the pressure of liquid.
Present existing throw-in type fluid level transmitter adopts the pressure of pressure sensor induced liquid, and convert thereof into electric signal, after this electric signal simulated processing of circuit, output changes corresponding electric signal with liquid level, and this electric signal is sent liquid level to collecting unit by special cable and shown, records, processes and store.
There is four problems in prior art, and first, pressure sensor and mimic channel be in case encapsulation owing to the sealing reason, can't be adjusted from the outside calibration of zero point and full scale and later stage.The variation of the second, pressing for balancing Atmospheric, the back pressure cavity of throw-in type fluid level transmitter need to be connected with atmosphere, but the condensate water that forms when atmospheric temperature changes can enter internal damage circuit and sensing element.Three, mimic channel can't be realized freely changing of fluid density and online the setting.Four, pressure sensor, probing shell adopt O-ring seal sealing, poor reliability.
Summary of the invention
Technical problem to be solved in the utility model provides the stronger digitizing throw-in type fluid level transmitter of a kind of reliability, stability and antijamming capability.
The technical solution of the utility model is achieved in that
Digitizing throw-in type fluid level transmitter comprises: the pressure sensing module; Also comprise: signal amplification and modular converter, MCU control and processing module, electric current output module, communication module, demonstration and button operation module; Described pressure sensing module is all-welded structure; Described pressure sensing module connects described signal and amplifies and modular converter, described signal amplification is connected with processing module with MCU control with modular converter, and described MCU control is connected with the button operation module with electric current output module, communication module, demonstration respectively with processing module.
Described signal amplifies and modular converter comprises operational amplifier and programmable amplifier.
Described demonstration and button operation module comprise display screen and button, and described display screen is preferably LCD display.
The level value of pressure sensing module induced liquid, and level value is output as voltage signal; Signal amplifies with the voltage signal of modular converter to the output of pressure sensing module and carries out carrying out analog to digital conversion after the amplification filtering again, then outputs to MCU control and processing module; MCU control and processing module will represents that the digital signal of liquid level numerical value processes, and output to show and the button operation module shows, be processed into simultaneously electric current and export through the electric current output module; Described demonstration and button operation module show level value at the scene, simultaneously enter each menu in conjunction with button on the spot and carry out various settings and configuration; Described communication module is used for carrying out exchanges data between transmitter and computer and the manual operator; Described electric current output module converts level value to the industrial 4-20mA simulation remote transfer signal output of standard.
Compared with prior art, the utlity model has following beneficial effect: the pressure sensing module adopts all-welded structure, can prevent effectively that liquid from infiltrating pressure transducer, improved the sealing reliability of product; Signal amplifies the digitizing that has realized simulating signal with modular converter, has improved stability and the anti-interference of product; And can directly show level value and carry out the on-site parameters modification by showing with the button operation module; Can communicate by letter with host computer etc. by communication module.
Description of drawings
Fig. 1 is the theory structure schematic diagram of digitizing throw-in type fluid level transmitter;
Fig. 2 is the agent structure schematic diagram of digitizing throw-in type fluid level transmitter;
Fig. 3 is the gauge outfit component internal structural representation of digitizing throw-in type fluid level transmitter.
The corresponding name of each several part is called among Fig. 2 and Fig. 3: 7, probe; 8, double-deck grease proofing cable; 9, joint flange seat; 10, gauge outfit assembly; 11, junction block; 12, demonstration and key-press module; 13, main circuit board.
Embodiment
As shown in Figure 1, be the principle assumption diagram of digitizing throw-in type fluid level transmitter, circuit structure of the present utility model comprises: pressure sensing module 1, signal amplify and modular converter 2, MCU control and processing module 3, demonstration and button operation module 4, communication module 5 and electric current output module 6.
Described pressure sensing module 1 connects described signal and amplifies and modular converter 2, described signal amplification is connected with processing module 3 with modular converter 2 and MCU control, and described MCU control is connected with button operation module 4, communication module 5, electric current output module 6 with demonstration respectively with processing module 3.
Described signal amplifies and modular converter 2 comprises operational amplifier and programmable amplifier.
The level value of pressure sensing module 1 induced liquid, and with the level value output voltage signal; Described signal amplify with modular converter 2 in operational amplifier with the voltage signal of pressure sensing module 1 output amplify process with filtering after, the input programmable amplifier, again filtering after described programmable amplifier is selected to amplify according to signal magnitude, export described modulus conversion chip to, conversion chip is with after signal digitalized, output to MCU control and processing module 3, MCU control and processing module 3 will represent that again the digital signal of liquid level numerical value processes, outputing to demonstration shows with button operation module 4, being processed into simultaneously electric current through 6 outputs of electric current output module, is the electric current that is processed into 4-20mA in this example.
Demonstration is preferably LCD display with the display screen of button operation module 4, can certainly be other display device; Button is used for parameters, parameter information is inputted MCU control process with processing module 3.The parameter that button arranges is including but not limited to the pressure calibration parameter information, and the signal processing mode parameter information shows the output configuration parameter information, span shift and corrected parameter information; The button setting not only makes things convenient for production testing, and makes things convenient for the user according to on-the-spot configuration and correct on-the-spot and maintenance.
Communication module 5 is used for MCU control and the digital signal of processing module 3 outputs are changed mutually with outside host computer signal, to reach the mutually intercommunication between host computer and the transmitter, be convenient to computing machine software operation transmitter, realize the communication of transmitter the machine, parameter arranges, the functions such as functional configuration.
As shown in Figures 2 and 3, this digitizing throw-in type fluid level transmitter comprises: probe 7, double-deck grease proofing cable 8, joint flange seat 9 and gauge outfit assembly 10, junction block 11, demonstration and key-press module 12 and main circuit board 13.
Described probe 7 is connected through joint flange seat 9 and gauge outfit assembly 10 and the main circuit board 13 that is arranged in the gauge outfit assembly 10 by the grease proofing cable 8 of bilayer, and the main circuit boards 13 in the gauge outfit assembly 10 are connected respectively with key-press module 12 with junction block 11, demonstration.
In pressure sensing module 1 static probe 7 of all-welded structure; Comprise on the main circuit board 13 that signal amplifies and modular converter 2, MCU control and processing module 3, communication module 5 and electric current output module 6; Described signal amplifies and modular converter 2 comprises operational amplifier and programmable amplifier.
The level value of pressure sensing module 1 induced liquid, and level value is output as voltage signal, by the grease proofing cable 8 of bilayer be connected to signal in the main line plate plate 13 amplify with modular converter 2 in the voltage signal with 1 output of pressure sensing module amplify process with filtering after, the input programmable amplifier, again filtering after described programmable amplifier is selected to amplify according to signal magnitude, export described modulus conversion chip to, conversion chip is with after signal digitalized, output to MCU control and processing module 3, MCU control and processing module 3 will represent that again the digital signal of liquid level numerical value processes, output to demonstration and advance to show current level value with key-press module 12, and carry out parameters by button, parameter that button arranges is including but not limited to the pressure calibration parameter information, the signal processing mode parameter information, show the output configuration parameter information, span shift and corrected parameter information etc.; And can communicate by communication module 5 and host computer; Being processed into simultaneously electric current through junction block 11 outputs, is the electric current that is processed into 4-20mA in this example.
Pressure sensing module 1 of the present utility model adopts all-welded structure, can prevent effectively that liquid from infiltrating pressure transducer, improved the sealing reliability of product; Signal amplifies the digitizing that has realized simulating signal with modular converter 2, has improved stability and the anti-interference of product; And can directly show level value and carry out the on-site parameters modification by showing with key-press module 12; Can communicate by letter with host computer etc. by communication module 5.
The according to the above description announcement of book and instruction, the utility model those skilled in the art can also carry out suitable change and modification to above-mentioned embodiment.Therefore, the embodiment that discloses and describe above the utility model is not limited to also should fall in the protection domain of claim of the present utility model modifications and changes more of the present invention.In addition, although used some specific terms in this instructions, these terms do not consist of any restriction to the utility model just for convenience of description.
Claims (3)
1. digitizing throw-in type fluid level transmitter comprises: pressure sensing module (1); It is characterized in that, also comprise: signal amplifies and modular converter (2), MCU control and processing module (3), demonstration and button operation module (4), communication module (5), electric current output module (6); Described pressure sensing module (1) is all-welded structure; Described pressure sensing module (1) connects described signal and amplifies and modular converter (2), described signal amplification is connected with processing module (3) with MCU control with modular converter (2), and described MCU control is connected with button operation module (4), communication module (5), electric current output module (6) with demonstration respectively with processing module (3).
2. digitizing throw-in type fluid level transmitter according to claim 1 is characterized in that: described signal amplifies with modular converter (2) and comprises operational amplifier and programmable amplifier.
3. digitizing throw-in type fluid level transmitter according to claim 1, it is characterized in that: described demonstration and button operation module (4) comprise display screen and button, and described display screen is preferably LCD display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220360446 CN202853691U (en) | 2012-07-24 | 2012-07-24 | Digital input type level transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220360446 CN202853691U (en) | 2012-07-24 | 2012-07-24 | Digital input type level transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202853691U true CN202853691U (en) | 2013-04-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220360446 Expired - Fee Related CN202853691U (en) | 2012-07-24 | 2012-07-24 | Digital input type level transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202853691U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061978A (en) * | 2014-06-17 | 2014-09-24 | 西安微纳传感器研究所有限公司 | Intelligent liquid level transmitter and control method thereof |
| CN108168649A (en) * | 2017-12-08 | 2018-06-15 | 张家港燎原环保科技有限公司 | Settle the liquid level alarm device of kettle |
-
2012
- 2012-07-24 CN CN 201220360446 patent/CN202853691U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061978A (en) * | 2014-06-17 | 2014-09-24 | 西安微纳传感器研究所有限公司 | Intelligent liquid level transmitter and control method thereof |
| CN108168649A (en) * | 2017-12-08 | 2018-06-15 | 张家港燎原环保科技有限公司 | Settle the liquid level alarm device of kettle |
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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: 20130403 Termination date: 20140724 |
|
| EXPY | Termination of patent right or utility model |