CN105784018A - Differential pressure transmitter - Google Patents
Differential pressure transmitter Download PDFInfo
- Publication number
- CN105784018A CN105784018A CN201610241532.3A CN201610241532A CN105784018A CN 105784018 A CN105784018 A CN 105784018A CN 201610241532 A CN201610241532 A CN 201610241532A CN 105784018 A CN105784018 A CN 105784018A
- Authority
- CN
- China
- Prior art keywords
- differential pressure
- pressure transmitter
- range
- current signal
- judgment means
- 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.)
- Pending
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a differential pressure transmitter. A range segmenting setting device for re-dividing the range of the differential pressure transmitter into multiple sections of continuous ranges is arranged in the differential pressure transmitter. A current signal judging device for judging whether the current signal output by the differential pressure transmitter is in the 4-20mA standard current signal range or not is arranged in the differential pressure transmitter, and if 4</=I</=20, the current signal judging device uses the current signal output by the differential pressure transmitter as the transmission signal; if I<4 or I>20, the current signal judging device switches the range of the differential pressure transmitter from the previous range to the next range until the output current signal is in the 4-20mA standard current signal range. The differential pressure transmitter has the advantages that the differential pressure transmitter with relative small range is used to measure the different pressure signals of to-be-measured media such as liquid, gas and steam and transmits corresponding current signals, the measuring precision of the liquid level, density, flow or pressure of the to-be-measured media can be increased greatly, and wide application range is achieved.
Description
Technical field
The present invention relates to a kind of differential pressure transmitter.
Background technology
Measure liquid at present, the liquid level of the medium such as gas and steam, density, when flow and pressure and other parameters, differential pressure transmitter and integrating instrument is mainly adopted to be assembled into a set of measurement apparatus, the differential pressure signal that differential pressure transmitter transmits directly affects the precision of measured Medium Measurement result, the range of differential pressure transmitter of the prior art and range ratio are all relatively-stationary, therefore to guarantee certainty of measurement, the differential pressure transmitter of corresponding range and range ratio is selected when measuring measured medium, the use scope so making differential pressure transmitter is subject to a definite limitation, the certainty of measurement of measured medium additionally also can be affected when the differential pressure signal of measured medium fluctuates bigger.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of when measuring the data such as the liquid level of medium, density, flow and pressure such as liquid, gas and steam, is not limited by range and range ratio and all can export relatively accurate differential pressure signal thus improving the differential pressure transmitter of measured Medium Measurement precision.
For solving above-mentioned technical problem, the differential pressure transmitter of the present invention, it is provided with the range subsection setup device for the range of differential pressure transmitter being reclassified as the continuous range of multistage in it；For judging the differential pressure transmitter output current signal whether current signal judgment means within the scope of 4 ~ 20mA standard current signal, if during 4≤I≤20, the current signal that this current signal judgment means exports now differential pressure transmitter is as transmission signal；If during I 4 or I 20, this current signal judgment means is switched to next range the range of described differential pressure transmitter by a upper range, till the current signal exported is within the scope of 4 ~ 20mA standard current signal.
The range of described differential pressure transmitter is reclassified as the continuous range of multistage by computer program by the present invention, the differential pressure signal of the measured medium according to differential pressure transmitter reception carries out range switching by current signal judgment means, finally be equivalent to be measured the differential pressure signal of the measured mediums such as liquid, gas and steam by a relatively small range differential pressure transmitter, transmit corresponding current signal, such that it is able to be greatly enhanced the certainty of measurement of the liquid level of measured medium, density, flow or pressure.Additionally, owing to the range of differential pressure transmitter can be carried out subsection setup again by heretofore described range subsection setup device, can not being limited by the range of differential pressure transmitter and range ratio when therefore measuring the differential pressure signal of the measured mediums such as liquid, gas and steam, the scope of application is more extensive.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Fig. 1 is the computer program FB(flow block) involved by a kind of differential pressure transmitter of the present invention.
Detailed description of the invention
Give the computer program FB(flow block) involved by a kind of differential pressure transmitter of the present invention referring to Fig. 1, Fig. 1, be provided with in the differential pressure transmitter of the present invention for the range P of differential pressure transmitter is reclassified as the continuous range P of multistage1、P2、P3……PXRange subsection setup device；For judging the differential pressure transmitter output current signal I whether current signal judgment means within the scope of 4 ~ 20mA standard current signal, if during 4≤I≤20, the current signal I that this current signal judgment means exports now differential pressure transmitter is as transmission signal；If during I 4 or I 20, this current signal judgment means the range P of described differential pressure transmitter by a upper range P1Switch to next range P2, till the current signal I exported is within the scope of 4 ~ 20mA standard current signal.
Claims (1)
1. a differential pressure transmitter, it is characterised in that: it is provided with in it for the range of differential pressure transmitter (P) is reclassified as the continuous range (P of multistage1、P2、P3……PX) range subsection setup device；For judging differential pressure transmitter output current signal (I) the whether current signal judgment means within the scope of 4 ~ 20mA standard current signal, if during 4≤I≤20, the current signal (I) that this current signal judgment means exports now differential pressure transmitter is as transmitting signal；If during I 4 or I 20, this current signal judgment means the range (P) of described differential pressure transmitter by a upper range (P1) switch to next range (P2), till the current signal (I) exported is within the scope of 4 ~ 20mA standard current signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610241532.3A CN105784018A (en) | 2016-04-19 | 2016-04-19 | Differential pressure transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610241532.3A CN105784018A (en) | 2016-04-19 | 2016-04-19 | Differential pressure transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105784018A true CN105784018A (en) | 2016-07-20 |
Family
ID=56396733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610241532.3A Pending CN105784018A (en) | 2016-04-19 | 2016-04-19 | Differential pressure transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105784018A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113640176A (en) * | 2021-07-30 | 2021-11-12 | 深圳市中金岭南有色金属股份有限公司凡口铅锌矿 | Lime milk specific gravity measuring method, device and system and computer readable storage medium |
| CN115901021A (en) * | 2023-03-02 | 2023-04-04 | 北京昆仑海岸科技股份有限公司 | Method, apparatus, medium, and program product for determining pressure information |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1188231A (en) * | 1997-01-15 | 1998-07-22 | 机械工业部上海工业自动化仪表研究所 | Wide-range differential pressure type flowmeter |
| CN2615642Y (en) * | 2003-04-11 | 2004-05-12 | 张川潮 | Differential pressure measurement range adaptive differential pressure type flow meter |
| US20060105682A1 (en) * | 2004-10-01 | 2006-05-18 | John Bowman | System and method for monitoring and/or controlling a flow of a media |
| GB2446502B (en) * | 2007-02-06 | 2011-08-10 | Weatherford Lamb | Flowmeter array processing algorithm with wide dynamic range |
| CN103185614A (en) * | 2013-02-13 | 2013-07-03 | 乌光 | Differential pressure flow transmitter with multiple ranges and automatic range switching function |
| CN103808377A (en) * | 2014-03-11 | 2014-05-21 | 济钢集团有限公司 | Differential pressure type flow measuring system |
| CN204902902U (en) * | 2015-07-23 | 2015-12-23 | 毕托巴（上海）科技有限公司 | Low velocity of flow to high flow rate wide range clings to flowmeter than pitot |
-
2016
- 2016-04-19 CN CN201610241532.3A patent/CN105784018A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1188231A (en) * | 1997-01-15 | 1998-07-22 | 机械工业部上海工业自动化仪表研究所 | Wide-range differential pressure type flowmeter |
| CN2615642Y (en) * | 2003-04-11 | 2004-05-12 | 张川潮 | Differential pressure measurement range adaptive differential pressure type flow meter |
| US20060105682A1 (en) * | 2004-10-01 | 2006-05-18 | John Bowman | System and method for monitoring and/or controlling a flow of a media |
| GB2446502B (en) * | 2007-02-06 | 2011-08-10 | Weatherford Lamb | Flowmeter array processing algorithm with wide dynamic range |
| CN103185614A (en) * | 2013-02-13 | 2013-07-03 | 乌光 | Differential pressure flow transmitter with multiple ranges and automatic range switching function |
| CN103808377A (en) * | 2014-03-11 | 2014-05-21 | 济钢集团有限公司 | Differential pressure type flow measuring system |
| CN204902902U (en) * | 2015-07-23 | 2015-12-23 | 毕托巴（上海）科技有限公司 | Low velocity of flow to high flow rate wide range clings to flowmeter than pitot |
Non-Patent Citations (1)
| Title |
|---|
| 张建华: "《热工仪表及自动装置》", 31 March 2006, 中国电力出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113640176A (en) * | 2021-07-30 | 2021-11-12 | 深圳市中金岭南有色金属股份有限公司凡口铅锌矿 | Lime milk specific gravity measuring method, device and system and computer readable storage medium |
| CN113640176B (en) * | 2021-07-30 | 2024-02-20 | 深圳市中金岭南有色金属股份有限公司凡口铅锌矿 | Lime milk specific gravity measuring method, device, system and computer readable storage medium |
| CN115901021A (en) * | 2023-03-02 | 2023-04-04 | 北京昆仑海岸科技股份有限公司 | Method, apparatus, medium, and program product for determining pressure information |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160720 |
|
| RJ01 | Rejection of invention patent application after publication |