CN201060079Y - Intelligent differential pressure cell - Google Patents
Intelligent differential pressure cell Download PDFInfo
- Publication number
- CN201060079Y CN201060079Y CNU2007200136238U CN200720013623U CN201060079Y CN 201060079 Y CN201060079 Y CN 201060079Y CN U2007200136238 U CNU2007200136238 U CN U2007200136238U CN 200720013623 U CN200720013623 U CN 200720013623U CN 201060079 Y CN201060079 Y CN 201060079Y
- Authority
- CN
- China
- Prior art keywords
- differential pressure
- sensor
- adapter
- pressure sensor
- microprocessor
- 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
- Measuring Fluid Pressure (AREA)
Abstract
The utility model relates to a measuring instrument of industrial autoimmunization, in particular to an intelligent differential pressure transmitter, which comprises a sensor, an adapter and a microprocessor. The sensor is a totally welded structure with duplex cavity and is composed of an isolating film, a differential pressure sensor, an absolute pressure sensor, filling fluid, an overloading film and a sensor main body. The isolating film is arranged at the outer side of the sensor main body and is contacted with the filling fluid. The differential pressure sensor and the absolute pressure sensor are arranged in the inner part of the sensor main body. The differential pressure sensor is connected with the negative-pressure side of the transmitter or a vacuum cavity via a capillary. The differential pressure sensor and the absolute pressure sensor are connected with the adapter, and the adapter is connected with the microprocessor. Compared with the prior art, the utility model has the advantages of low equipment cost of design, debugging and operation, compact structure, light weight and higher stability and reliability. The weight is kept between 1.2 and 3.5kg. Long-term drift is less than 0.05 percent per year.
Description
Technical field
The utility model relates to a kind of industrial automation measuring instrument, and is specifically a kind of to industrial process complete series differential pressure, pressure, absolute pressure, flow and level gauging, the intelligent differential pressure transmitter with analog or digital output signal.
Background technology
Differential pressure transmitter is one of most widely used field instrument in the industrial automation instrument, traditional differential pressure transducer generally has two kinds: i.e. metal capacitance and silicon strain pressure resistance type, potentiometer, full scale are adjusted potentiometer and 4～20mA constant-current circuit is formed by adjusting at differential pressure pick-up, signal amplification circuit, zero point, and its shortcoming is: function singleness, volume greatly, lack Compensation Design, precision is not enough.The transmission circuit of especially present intelligent differential pressure transmitter mainly is made of signals collecting, signal transformation and signal processing circuit, and the element of employing is many, temperature influence is big, causes stability and poor reliability.
Summary of the invention
For addressing the above problem, the utility model provide a kind of rational in infrastructure, safe and reliable, the circuit antijamming capability is strong, and the intelligent differential pressure transmitter with pressure supplementary functions.
For achieving the above object, the utility model is by the following technical solutions:
A kind of intelligent differential pressure transmitter, it is characterized in that, comprise sensor, adapter, microprocessor, sensor is all-welded double cavity structure, form by isolation diaphragm, differential pressure pick-up, absolute pressure transducer, filling liquid, overload diaphragm, sensor body, isolation diaphragm is arranged at the outside of sensor body and contacts with filling liquid, is provided with differential pressure pickup and absolute pressure transducer in sensor body inside, and differential pressure pickup links to each other with transmitter suction side or vacuum chamber through kapillary; Differential pressure pickup is connected with adapter with absolute pressure transducer, and adapter is connected with microprocessor.
Being provided with lower limit button, range button and write-protect button on crust of the device is connected with microprocessor.
Differential pressure pick-up and absolute pressure transducer are compound little silicon solid state sensor.
Compared with prior art, usefulness of the present utility model is:
1, use advanced compound little silicon solid state sensor, measuring accuracy is 0.05%, and the wide-range ratio is 100: 1, and single-track overload can reach rated pressure, and maximum 50MPa can measure differential pressure, pressure, absolute pressure, flow and liquid level; 5 years non-maintaining, saves the repair and maintenance expense.
2, compound sensor can be measured three kinds of parameters, reduces design, debugging and operating cost.Volume is little, in light weight, only 1.2～3.5kg.Long term drift 0.05% year has advantages of higher stability and reliability.Temperature, influence of static pressure are minimum, can ignore.
3, temperature range is wide: environment temperature-40 ℃～+ 85 ℃; Measured medium temperature-50 ℃～+ 315 ℃.
4, crust of the device is provided with write-protect button, lower limit button, range button.
Description of drawings
Fig. 1 is the structural representation of intelligent differential pressure transmitter.
Among the figure, 1 adapter, 2 isolation diaphragms, 3 differential pressure pick-ups, 4 absolute pressure transducers, 5 filling liquid, 6 overload diaphragms, 7 sensor body, 8 microprocessors, 9 calibrating terminals, 10 signal terminals, 11 lower limit buttons, 12 range buttons, 13 write-protect buttons.
Fig. 1 lower left side
Number expression left side is a malleation; The right side
Number the expression right side be negative pressure.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described further:
A kind of intelligent differential pressure transmitter, comprise sensor, adapter 1, microprocessor 8, sensor is all-welded double cavity structure, form by isolation diaphragm 2, differential pressure pick-up 3, absolute pressure transducer 4, filling liquid 5, overload diaphragm 6, sensor body 7, isolation diaphragm 2 is arranged at the outside of sensor body 7 and contacts with filling liquid 5, be provided with differential pressure pickup 3 and absolute pressure transducer 4 in sensor body 7 inside, 4 of absolute pressure transducers are experienced the pressure that high pressure is surveyed, as the reference value of static pressure compensation; Differential pressure pick-up 3 is experienced the pressure of suction side, links to each other with transmitter suction side or vacuum chamber through kapillary, and differential pressure pickup 3 is connected with adapter 1 with absolute pressure transducer 4, and adapter 1 is connected with microprocessor 8.
Being provided with lower limit button 11, range button 12 and write-protect button 13 on crust of the device is connected with microprocessor 8.
Differential pressure pick-up 3 and absolute pressure transducer 4 are compound little silicon solid state sensor; Isolation diaphragm 2 is selected Hastelloy C material for use; Filling liquid is selected silicone oil or vegetable oil for use.
Its course of work is: tested differential pressure/absolute pressure is through isolation diaphragm 2 and filling liquid 5, pass to the detection diaphragm of differential pressure pick-up 3 and absolute pressure transducer 4, the micro-displacement that detects diaphragm causes the variation of detection system output voltage, this output voltage is directly proportional with differential pressure, and output voltage signal zooms into the output signal of standard through conversion through adapter 1, microprocessor 8.
The utility model intelligent differential pressure transmitter uses advanced compound little silicon solid state sensor, measurement range: differential pressure scope: 0-50Pa～60MPa; Pressure limit: 0-200Pa～80MPa.Measuring media is gas, liquid and steam.Output: 4～20mA transmitter, its characteristic be linearity, square root, have freely the programming of 20 reference point, X
3/2And X
5/2Output function.Transmitter, its characteristic be linearity, square root, have freely the programming of 20 reference point, X
3/2And X
5/2Output function.Ambient temperature effect: temperature coefficient (40 ℃～+ 80 ℃) is to zero point, be 0.04%/10 ℃ to range.Influence of static pressure: be 0.05%/0.1MPa during range 1kPa; During range 〉=6KPa is 0.05%/10MPa.Electromagnetic interference effect is 0.05%.
Claims (3)
1. intelligent differential pressure transmitter, it is characterized in that, comprise sensor, adapter (1), microprocessor (8), sensor is all-welded double cavity structure, by isolation diaphragm (2), differential pressure pick-up (3), absolute pressure transducer (4), filling liquid (5), overload diaphragm (6), sensor body (7) is formed, isolation diaphragm (2) is arranged at the outside of sensor body (7) and contacts with filling liquid (5), be provided with differential pressure pickup (3) and absolute pressure transducer (4) in sensor body (7) inside, differential pressure pickup (3) links to each other with transmitter suction side or vacuum chamber through kapillary; Differential pressure pickup (3) is connected with adapter (1) with absolute pressure transducer (4), and adapter (1) is connected with microprocessor (8).
2. a kind of intelligent differential pressure transmitter according to claim 1 is characterized in that, is provided with lower limit button (11), range button (12) and write-protect button (13) and is connected with microprocessor (8) on crust of the device.
3. a kind of intelligent differential pressure transmitter according to claim 1 is characterized in that, differential pressure pick-up (3) and absolute pressure transducer (4) are compound little silicon solid state sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200136238U CN201060079Y (en) | 2007-07-31 | 2007-07-31 | Intelligent differential pressure cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200136238U CN201060079Y (en) | 2007-07-31 | 2007-07-31 | Intelligent differential pressure cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201060079Y true CN201060079Y (en) | 2008-05-14 |
Family
ID=39408558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200136238U Expired - Fee Related CN201060079Y (en) | 2007-07-31 | 2007-07-31 | Intelligent differential pressure cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201060079Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102654563A (en) * | 2011-11-15 | 2012-09-05 | 哈尔滨瑞格大电机技术有限公司 | Three-parameter monitor for air gap of motor |
| CN105783958A (en) * | 2014-12-23 | 2016-07-20 | 国核电站运行服务技术有限公司 | Switchable pressure/different pressure transmitter and method for using same |
| CN108507715A (en) * | 2018-06-29 | 2018-09-07 | 无锡昆仑富士仪表有限公司 | A kind of floating cell suitable for differential pressure transmitter |
-
2007
- 2007-07-31 CN CNU2007200136238U patent/CN201060079Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102654563A (en) * | 2011-11-15 | 2012-09-05 | 哈尔滨瑞格大电机技术有限公司 | Three-parameter monitor for air gap of motor |
| CN105783958A (en) * | 2014-12-23 | 2016-07-20 | 国核电站运行服务技术有限公司 | Switchable pressure/different pressure transmitter and method for using same |
| CN105783958B (en) * | 2014-12-23 | 2018-04-17 | 国核电站运行服务技术有限公司 | Changeable pressure difference transmitter and application method |
| CN108507715A (en) * | 2018-06-29 | 2018-09-07 | 无锡昆仑富士仪表有限公司 | A kind of floating cell suitable for differential pressure transmitter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101936791B (en) | Digital pressure gauge | |
| CN201653608U (en) | High-intelligent resistance strain gage sensor | |
| CN201293698Y (en) | Pressure transmitter with temperature compensation circuit | |
| CN202092821U (en) | Intrinsic safe digital pressure transducer | |
| CN101261148A (en) | Pressure type digital level sensor and its measuring method | |
| CN201754115U (en) | Digital pressure meter | |
| CN102778255A (en) | High-precision liquid level, temperature, density multifunctional measuring system | |
| CN201819769U (en) | Calibrating device for sudden-rising pressure relay | |
| CN108195503A (en) | Circular iris resistance-strain type pressure, differential pressure pickup | |
| CN203881412U (en) | Device for fast calibrating differential pressure type liquidometer on working condition site | |
| CN201060079Y (en) | Intelligent differential pressure cell | |
| CN114878038A (en) | Double-fiber grating diaphragm type pressure sensor and low-pressure calibration system and method thereof | |
| CN203241168U (en) | Platinum resistor non-linear correction temperature transmitter | |
| CN211978201U (en) | Pressure transmitter for medical equipment | |
| CN201289415Y (en) | High-temperature fused mass pressure gauge | |
| CN205483165U (en) | Two silicon capacitance fluviographs of pressing extremely of high accuracy | |
| CN201060070Y (en) | On-line marking-correcting fixed load sensor | |
| CN100416250C (en) | Miniaturized Smart Differential Pressure/Pressure Transmitter | |
| CN206378225U (en) | Pressure transmitter and pressure inverting system | |
| CN219495522U (en) | Piezoresistive pressure sensor detection circuit | |
| CN203037609U (en) | Humidity transmitter | |
| CN208026421U (en) | Circular iris resistance-strain type pressure, differential pressure pickup | |
| CN203191103U (en) | Environment analog quantity acquisition module | |
| CN204389095U (en) | Miniaturized pressure sensor parameters amending unit | |
| CN201355291Y (en) | Digital display type pressure transmitter with two-way switching value output |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080514 Termination date: 20100731 |