CN2566247Y - Intelligent passive digital display liquid level gauge - Google Patents
Intelligent passive digital display liquid level gauge Download PDFInfo
- Publication number
- CN2566247Y CN2566247Y CN 02275214 CN02275214U CN2566247Y CN 2566247 Y CN2566247 Y CN 2566247Y CN 02275214 CN02275214 CN 02275214 CN 02275214 U CN02275214 U CN 02275214U CN 2566247 Y CN2566247 Y CN 2566247Y
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- CN
- China
- Prior art keywords
- liquid level
- digital display
- level gauge
- interface
- intelligent passive
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- 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
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The utility model relates to an intelligent passive digital display liquid level gauge, which belongs to the technical field of measurement. The utility model is characterized in that the intelligent passive digital display liquid level gauge uses a passive power supply mode to convert liquid level changed pressure difference into voltage difference through the single chip micro processing technology; then the voltage difference is processed into a measuring value which can reach the remote transmission of standard signals and is displayed on line by a digital display. The intelligent passive digital display liquid level gauge comprises a main and an auxiliary gauge bodies, wherein, a liquid phase pressure sensor, and signal and standard signal input and output interfaces are arranged on the main gauge body; a signal output interface and a gas phase pressure sensor are arranged on the auxiliary gauge body; the signal input interface of the main gauge body is electrically connected with the signal output interface of the auxiliary gauge body; the liquid and the gas phase pressure sensors are all connected with a liquid and a gas phase interfaces of a measured device. A photocell or a spare dry cell is taken to supply power. The utility model has the advantages of simple structure, convenient installation and maintenance, energy saving, explosion prevention, high measuring precision, accurate value indication, low cost, etc.
Description
Technical field
The utility model relates to field of measuring technique, is the intelligent instrument of online numeral demonstration of a kind of passive power supply and standard signal teletransmission.
Background technology
At present, enterprise production automation aspects such as petrochemical complex, thermoelectricity, smelting, light industry pharmacy, measuring liquid level changes in the on-line measurement primary instrument instrument measurement mode and technical pattern are varied.With the differential pressure type level gauge is example: its many employing differential pressure transmitter is a primary instrument, and it will install positive and negative pressure conduit, three valve groups, and blowoff valve, hot insulation can is mixed in winter protection.The number percent that only shows liquid level, and when the level gauging of band temperate zone pressure equipment, also to solve the vapor condensation problem, normally instrument will be done negative traction, and negative pressure guiding pipeline wants to fill in the reload buffer jar non-corrosiveness medium close with measured medium density.The whole measuring system complex structure, response lag, the instrument heaviness, error component is many, and measuring accuracy is low, can not onlinely show measured value really and accurately, produces to enterprise and brings a lot of inconvenience and the wasting of resources.
Summary of the invention
Technical problem to be solved in the utility model provides and a kind ofly can realize that online numeral shows measured value, carries out the standard signal teletransmission simultaneously.Simple in structure, in light weight, installation and maintenance are convenient, and cost is low, the measuring accuracy height, and indicating value is accurate, safe and reliable Intelligent Passive digital display liquid level gauge.
The technical scheme that solves its technical matters employing is: a kind of Intelligent Passive digital display liquid level gauge, its special character is: it comprises the master, pay the table body, be built-in with controller at the master meter body, this controller is by single-chip microprocessor and digital indicator, the voltage difference amplifier, power supply is electrically connected to be formed, on master meter, be provided with signal input interface, standard signal output interface and sensor interface, the single-chip microprocessor is electrically connected with the standard signal output interface of master meter body, pay the table body and be provided with signal output interface, sensor interface, the signal input interface of master meter body is electrically connected with the signal output interface of paying the table body, on the sensor interface of master meter body, be connected with the liquid phase pressure transducer, on the sensor interface of paying the table body, be connected with the gaseous pressure sensor, liquid, vapor phase sensor is respectively by pipeline and equipment under test liquid, the gas phase interface connects.Said controller also comprises the density adjuster that is electrically connected with the single-chip microprocessor.Said power supply is a photoelectric cell.Said power supply is the standby dry cell by relay control.
The advantage applies of Intelligent Passive digital display liquid level gauge of the present utility model exists:
1, used passive power supply mode, by the photoelectric cell uninterrupted power supply, got final product operate as normal under low-light, its voltage is low, power consumption is little, is fit to all kinds of explosion-proof occasions and uses, and is energy-conservation, safe and reliable.
2, used gas phase, liquid phase pressure respectively, the gas, liquid pressure signal is electrically connected, and is not subjected to multiple factor affecting such as gaseous condensate.
3, used the single-chip microprocessor, play intelligent effect, it is with the voltage difference process data processing of the electric signal of gas, liquid pressure transducer generation, processes such as power amplification, reach and to drive the online demonstration measured value of digital indicator numeral, and produce standard signal and carry out teletransmission, play the effect of transmitter, patrol and examine to execute-in-place and bring convenience.
4, it is simple and light, and installation and maintenance are convenient, energy-saving explosion-proof, and the external cause influence is little, the measuring accuracy height, indicating value is accurate and visual.
Description of drawings
Fig. 1 is Intelligent Passive digital display liquid level gauge master meter body 1 structural representation
Fig. 2 is the A-A cross-sectional schematic of Fig. 1
Fig. 3 pays the table body 14 structural representations for Intelligent Passive digital display liquid level gauge
Fig. 4 is the controller circuitry functional-block diagram
Fig. 5 is the controller circuitry schematic diagram
Fig. 6 is an Intelligent Passive digital display level gauge system connection diagram
Embodiment
The utility model is described in further detail to utilize drawings and Examples below.
With reference to Fig. 1,2 and 6, the master meter body 1 of Intelligent Passive digital display liquid level gauge is provided with signal input interface 2, standard signal output interface 4 and sensor interface 3.Sensor interface 3 is the malleation input interface.Be built-in with controller at master meter body 1, this controller is electrically connected by the single-chip microprocessor 11 that is provided with on circuit board 12 and digital indicator 10, voltage difference amplifier 25, density adjuster 21, the relay 19 that can connect standby dry cell 9 to be formed.Photoelectric source 8 places the rear portion of optical window 5 on the master meter body 1, and digital indicator 10 places the rear portion of digital display window 6 on the master meter body 1.Connection terminal 13 places the rear in the master meter body 1, is used for connecting paying table body 14 input signals and standard output signals, and standby dry cell 9 places the below in the master meter body 1, so that change.Master meter body rear end is equipped with bonnet 20.Be connected with liquid phase pressure transducer 7 on sensor interface 3, liquid phase pressure transducer 7 has pressure-sensitive body 17.Pressure-sensitive body 17 1 ends of liquid phase pressure transducer 7 are connected with measured equipment 26 liquid phase interfaces 27 by pipeline.
With reference to Fig. 3 and 6, in paying table body 14, be provided with gaseous pressure sensor 18, an end of gaseous pressure sensor 18 is provided with negative pressure input interface 15, and the other end is provided with signal output interface 16.Be provided with pressure-sensitive body 22 at negative pressure input interface 15 1 ends, pressure-sensitive body 22 1 ends of gaseous pressure sensor 18 are connected with equipment under test 26 gas phase interfaces 28 by pipeline.Be built-in with connection terminal 24 paying a table body 14, connection terminal 24, pay the signal output interface 16 of table body 14, the signal input interface 2 of master meter body 1 is electrically connected, and the signal that gaseous pressure sensor 18 pressure-sensitive bodies 22 are produced inserts in the built-in controller of master meter body 1.
With reference to Figure 4 and 5, single-chip microprocessor 11 and voltage difference amplifier 25, digital indicator 10, the power supply 8,9 of controller connect to form.The voltage difference amplifier 25 of controller is by integrated circuit die I C
1, potentiometer R
W, electric cloudy R
1-R
6, resistance R
H1, R
H2, capacitor C
1, C
2Be electrically connected and form.
The electric signal R that the pressure-sensitive body 17 of the liquid phase pressure transducer 7 of master meter body 1 produces
H1Electric signal R with pressure-sensitive body 22 generations of paying the gaseous pressure sensor 18 of showing body 14
H2With fixed resistance R
1, R
2Form unbalanced bridge.Work as R
H1, R
H2When voltage difference was arranged, output terminal produced electric current, process R
3-R
6And C
1, C
2After the filtering circuit filtering of forming, by integrated circuit die I C
1Be amplified into the input end P of single-chip microprocessor 11
3.5, potentiometer R
WBe zero potentiometer.The power supply 8 of single-chip microprocessor 11 or 9 is introduced from pin 40 and pin two 0.The 11 built-in burnings of single-chip microprocessor have data handling system to comprise (A/D converter) digital indicator driver etc.Input end P when single-chip microprocessor 11
3.5When the signal input was arranged, this signal can be by output terminal P through the microprocessor 11 of single-chip
3.1Outputting standard signal, this standard signal by the output interface 4 of master meter body 1 by being electrically connected to central control room.Single-chip microprocessor 11 output terminal P
0.0-P
0.7Connect digital indicator 10, the i.e. D of LCD
0-D
7Input end pin, and the control signal E of digital indicator 10, P/W, P
sP with single-chip microprocessor 11
2.2, P
2.0Pin is connected.Thereby the output signal of single-chip microprocessor 11 drives digital indicator 10 again shows tested level value with the variation of tested liquid level.
With reference to Fig. 6, the liquid phase that the liquid phase pressure transducer 7 of the master meter body 1 of Intelligent Passive digital display liquid level gauge by malleation input interface 3 the is installed in equipment under test 26 pressure valve place of officiallying enroll.Pay table body 14 is installed in equipment under test 26 by gaseous pressure sensor 18 the negative pressure power valve place of gas phase.When tested liquid level equals zero, because pressure that master meter body 1 is accepted and pair pressure that table body 14 is accepted equate.Its voltage difference equals zero, and this moment, master meter body 1 interior controller acknowledge(ment) signal was zero, and its standard signal is output as zero, and digital indicator 10 shown numerical value are zero.When tested liquid level raise, the pressure that master meter body 1 is accepted increased, and the pressure of paying 14 acceptance of table body does not become.The liquid of table body 1,14 just will be led, be paid to controller in the master meter body 1 at this moment, two conversion of signals that differ in size that vapor phase sensor 7,18 produces become voltage difference to carry out data processing, after power amplification, promptly exported the standard signal of corresponding tested liquid level, driven digital indicator 10 again simultaneously and make it show the accurate numerical value of corresponding tested liquid level.Adjust density regulator 21, make its density corresponding, thereby measurement is revised, make the standard signal value of the numerical value of demonstration and output more accurate with measured medium.
The liquid that the utility model adopted, gaseous pressure sensor 7,18, digital indicator 10, single-chip microprocessor 11, photoelectric cell 8, dry cell 9, relay 19, density regulator 21, voltage difference amplifier 25 used devices are the commercially available prod, digital indicator 10 adopts liquid crystal digital display LCD, and single-chip microprocessor 11 adopts the MCS-8051 single-chip.
Claims (4)
1, a kind of Intelligent Passive digital display liquid level gauge, it is characterized in that: it comprises the master, pay the table body, be built-in with controller at the master meter body, this controller is by single-chip microprocessor and digital indicator, the voltage difference amplifier, power supply is electrically connected to be formed, on master meter, be provided with signal input interface, standard signal output interface and sensor interface, the single-chip microprocessor is electrically connected with the standard signal output interface of master meter body, pay the table body and be provided with signal output interface, sensor interface, the signal input interface of master meter body is electrically connected with the signal output interface of paying the table body, on the sensor interface of master meter body, be connected with the liquid phase pressure transducer, on the sensor interface of paying the table body, be connected with the gaseous pressure sensor, liquid, vapor phase sensor is respectively by pipeline and equipment under test liquid, the gas phase interface connects.
2, Intelligent Passive digital display liquid level gauge according to claim 1, it is characterized in that: said controller also comprises the density adjuster that is electrically connected with the single-chip microprocessor.
3, Intelligent Passive digital display liquid level gauge according to claim 1, it is characterized in that: said power supply is a photoelectric cell.
4, Intelligent Passive digital display liquid level gauge according to claim 1 is characterized in that: said power supply is the standby dry cell by relay control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02275214 CN2566247Y (en) | 2002-09-10 | 2002-09-10 | Intelligent passive digital display liquid level gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02275214 CN2566247Y (en) | 2002-09-10 | 2002-09-10 | Intelligent passive digital display liquid level gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2566247Y true CN2566247Y (en) | 2003-08-13 |
Family
ID=33739317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02275214 Expired - Fee Related CN2566247Y (en) | 2002-09-10 | 2002-09-10 | Intelligent passive digital display liquid level gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2566247Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103884399A (en) * | 2012-12-21 | 2014-06-25 | 上海朝辉压力仪器有限公司 | Liquid level transmitter |
| CN104154966A (en) * | 2014-07-25 | 2014-11-19 | 武汉飞恩微电子有限公司 | Liquid level sensor based on pressure detection |
-
2002
- 2002-09-10 CN CN 02275214 patent/CN2566247Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103884399A (en) * | 2012-12-21 | 2014-06-25 | 上海朝辉压力仪器有限公司 | Liquid level transmitter |
| CN103884399B (en) * | 2012-12-21 | 2016-12-28 | 上海朝辉压力仪器有限公司 | Fluid level transmitter |
| CN104154966A (en) * | 2014-07-25 | 2014-11-19 | 武汉飞恩微电子有限公司 | Liquid level sensor based on pressure detection |
| CN104154966B (en) * | 2014-07-25 | 2017-09-26 | 武汉飞恩微电子有限公司 | Liquid level sensor based on pressure detecting |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |