CN202453137U - Digital differential pressure transmitter - Google Patents
Digital differential pressure transmitter Download PDFInfo
- Publication number
- CN202453137U CN202453137U CN2012200079452U CN201220007945U CN202453137U CN 202453137 U CN202453137 U CN 202453137U CN 2012200079452 U CN2012200079452 U CN 2012200079452U CN 201220007945 U CN201220007945 U CN 201220007945U CN 202453137 U CN202453137 U CN 202453137U
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- differential pressure
- pressure transmitter
- processor
- communication interface
- digital
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Abstract
The utility model discloses a digital differential pressure transmitter, which can overcome field interference signals so as to accurately measure medium differential pressure. The digital differential pressure transmitter comprises a detecting circuit, a signal converting circuit, a processor, a display module, a signal output circuit, a keyboard, a zero-setting button and a communication interface; the detecting circuit is connected with the processor through the signal converting circuit; the processor is respectively connected with the display module, the signal output circuit, the keyboard, the zero-setting button and the communication interface; and a temperature sensor is arranged inside the digital differential pressure transmitter. With the adoption of a digital signal processing technology, the digital differential pressure transmitter has the advantages of excellent anti-interference capability, zero-point stability, zero-point automatic stable tracking capability and temperature automatic compensation capability. A communication interface, such as an HART (Highway Addressable Remote Transducer) communication interface, is directly communicated with a computer through a special switchover module, so that the long-distance control and management can be realized. The entire design framework of the digital differential pressure transmitter focuses on reliability, stability, high precision and intelligentization, so that the requirements (which are improved increasingly) on an industrial field application can be met.
Description
Technical field
The utility model relates to a kind of digital pressure differential pressure transmitter.
Background technology
In industrial process control field, the pressure differential pressure transmitter is that maximum transmitter kinds is used in the pressure differential pressure measurement, in recent years, and to miniaturization, high precision and intelligent direction development.When the pressure differential of instrument is pressed with effect, produce detection signal, through signaling conversion circuit, change corresponding digital amount signal into, perhaps the corresponding alerting signal of output is set according to different alarm set points, be used for the pressure differential pressure and the protection system of detection system.General pressure differential pressure transmitter is to use mimic channel to calibrate, and process is numerous and diverse, and is subject to the influence of on-the-spot undesired signal and makes measuring accuracy poor; Existing instrument can not carry out temperature compensation, also greatly reduces measuring accuracy.
Summary of the invention
To above-mentioned weak point of the prior art, the utility model aims to provide and a kind ofly can overcome on-the-spot undesired signal, reaches the digital pressure differential pressure transmitter of accurate measuring media pressure differential pressure.
The technical scheme of the utility model: digital pressure differential pressure transmitter; Comprise testing circuit, signaling conversion circuit, processor, display module, signal output apparatus, keyboard and communication interface; Testing circuit links to each other with processor through signaling conversion circuit, and said processor links to each other with display module, signal output apparatus, keyboard and communication interface respectively.
Also be provided with temperature sensor in this transmitter; Said processor is preferably 16-bit single-chip processor; Said communication interface is preferably the HART interface; Said signaling conversion circuit is A/D; Said signal output apparatus is D/A; Said display module is liquid crystal display; Also include zero-setting button, this zero-setting button links to each other with processor.
The beneficial effect of the utility model: the employing 16-bit single-chip processor is a key process unit; Strong functions and arithmetic capability have at a high speed guaranteed the fine quality of this transmitter; Through signaling conversion circuit the testing circuit conversion digital signal is reached in the processor and to handle; And be provided with temperature sensor in this transmitter; Use Digital Signal Processing, made this transmitter have good antijamming capability and zero stability, and possessed autostable tracking power and temperature self-compensation ability at zero point; Digital lcd shows can show pressure, two kinds of physical quantitys of temperature, and 0-100% simulation indication; Button operation can be accomplished basic parameter settings such as zero shift, range setting, damping setting easily under the situation of no standard pressure generator, and can again transmitter be demarcated, and is very easy to field adjustable; And communication interface such as HART communication interface, the direct and compunication through special-purpose interconnecting module is to realize Long-distance Control and management.Whole design framework is conceived to reliability, stability, high precision and intellectuality, satisfies the requirement of the industry spot application that improves day by day.
Description of drawings
Fig. 1 is the structured flowchart of the utility model.
Embodiment
Come further explain the utility model below in conjunction with specific embodiment and accompanying drawing.
Referring to Fig. 1; Said digital pressure differential pressure transmitter; Comprise testing circuit, signaling conversion circuit, processor, display module, signal output apparatus, keyboard, zero-setting button and communication interface; Testing circuit links to each other with processor through signaling conversion circuit, and said processor links to each other with display module, signal output apparatus, keyboard, zero-setting button and communication interface respectively.
Processor adopting 16-bit single-chip processor in the utility model, the fine quality that power and the high-speed computation ability through this single-chip microcomputer guarantees whole transmitter.And the signal that testing circuit is detected through signaling conversion circuit converts digital signal to through A/D and reaches in the 16-bit single-chip processor and handle; Digital quantity signal of output is delivered to signal output apparatus after the processing operations, and just D/A is converted into 4～20mA analog current and exports flow integrator to and carry out subsequent calculations.Processor also is connected with display module and keyboard simultaneously, is responsible for mutual grade for operation, such as showing physical quantity or analog quantity in whole testing result and the process through display module with digital lcd; Accomplish setting or demarcation through keyboard, make things convenient for field adjustable system's basic parameter, can also be through the zeroing of zero-setting button, so that detect next time such as the demonstration of data etc. to system's display parameter.Be used for digital communication through communication interface, realize transmitter HART communication like the HART interface.In this transmitter, be provided with temperature sensor, detect, thereby instrument is carried out auto thermal compensation in testing process, avoid influencing the accuracy of detection of whole transmitter fluid medium because of temperature variation through this temperature sensor fluid medium.
More than technical scheme that the utility model embodiment is provided carried out detailed introduction; Used concrete example among this paper principle and the embodiment of the utility model embodiment are set forth, the explanation of above embodiment only is applicable to the principle that helps to understand the utility model embodiment; Simultaneously, for one of ordinary skill in the art, according to the utility model embodiment, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as the restriction to the utility model.
Claims (8)
1. digital pressure differential pressure transmitter; It is characterized in that: comprise testing circuit, signaling conversion circuit, processor, display module, signal output apparatus, keyboard and communication interface; Testing circuit links to each other with processor through signaling conversion circuit, and said processor links to each other with display module, signal output apparatus, keyboard and communication interface respectively.
2. digital pressure differential pressure transmitter according to claim 1 is characterized in that: in transmitter, be provided with temperature sensor.
3. digital pressure differential pressure transmitter according to claim 1 is characterized in that: said processor is a 16-bit single-chip processor.
4. digital pressure differential pressure transmitter according to claim 1 is characterized in that: said communication interface is the HART interface.
5. digital pressure differential pressure transmitter according to claim 1 is characterized in that: said signaling conversion circuit is A/D.
6. digital pressure differential pressure transmitter according to claim 1 is characterized in that: said signal output apparatus is D/A.
7. digital pressure differential pressure transmitter according to claim 1 is characterized in that: said display module is liquid crystal display.
8. according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 described digital pressure differential pressure transmitters, it is characterized in that: also include zero-setting button, this zero-setting button links to each other with processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200079452U CN202453137U (en) | 2012-01-09 | 2012-01-09 | Digital differential pressure transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200079452U CN202453137U (en) | 2012-01-09 | 2012-01-09 | Digital differential pressure transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202453137U true CN202453137U (en) | 2012-09-26 |
Family
ID=46868992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200079452U Expired - Fee Related CN202453137U (en) | 2012-01-09 | 2012-01-09 | Digital differential pressure transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202453137U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103808377A (en) * | 2014-03-11 | 2014-05-21 | 济钢集团有限公司 | Differential pressure type flow measuring system |
| CN104977116A (en) * | 2015-07-10 | 2015-10-14 | 四川奇胜科技有限公司 | Micro-differential voltage transmitter |
-
2012
- 2012-01-09 CN CN2012200079452U patent/CN202453137U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103808377A (en) * | 2014-03-11 | 2014-05-21 | 济钢集团有限公司 | Differential pressure type flow measuring system |
| CN104977116A (en) * | 2015-07-10 | 2015-10-14 | 四川奇胜科技有限公司 | Micro-differential voltage transmitter |
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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: 20120926 Termination date: 20150109 |
|
| EXPY | Termination of patent right or utility model |