CN1447106A - Online portable multi-functional intellgence fluid density meters - Google Patents
Online portable multi-functional intellgence fluid density meters Download PDFInfo
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- CN1447106A CN1447106A CN 03114657 CN03114657A CN1447106A CN 1447106 A CN1447106 A CN 1447106A CN 03114657 CN03114657 CN 03114657 CN 03114657 A CN03114657 A CN 03114657A CN 1447106 A CN1447106 A CN 1447106A
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Abstract
This invention relates to an on-line portable multifunction intelligent liquid density instrument with integral measurement of temp and density including a sensor and an intelligent dieplay recording control device connecting with it and the sensor includes temp sensor and pressure different sensor composed of a top and a bottom pressure sensor detecting top and bottom pressure separately, the intelligent display recording control device includes a single chip processor connecting with the pressure sensor and temp sensor and transmitting and outputting density and temp by D/A converter.
Description
One, technical field:
The present invention relates to a kind of online portable multi-function intelligence Liquid density instrument, it can be used for the density of the fluent meterial of industrial container, laboratory containers and deep-well container is carried out online real-time monitoring, can portablely use again, insert medium observational record density value at any time.
Two, background technology:
The traditional measurement method of density is a weight of utilizing balance weighing liquid, measures the volume of liquid again with graduated cylinder, obtains density of liquid by calculating.For a lot of environment, industry spot environment particularly, this method is the incompatibility rig-site utilization very.Find by retrieval internet data, the online instant measurement products of density parameter is very rare, and major part wherein is low precision product, rare a few money high precision products, owing to be subjected to the restriction of its measuring principle, relatively harsher to the requirement of measuring media on the one hand, also need be when measuring on the other hand by relevant apparatus.The inventor once utilized the fluid level transmitter of teletransmission differential pressure principle and digital indicator to realize online observation to the liquid medium density in the industrial tank body, system's resultnat accuracy is the highest can only to reach 0.5% of differential pressure fluid level transmitter full scale, thisly utilize teletransmission differential pressure fluid level transmitter to carry out industrial online density measuring method to have following defective: 1, range of application is narrow, can only be applied to ground tank body container; 2, need accurately to measure at the scene the vertical range of probe up and down, bring personal error easily; 3, the scene almost can't be carried out secondary and demarcated, and demarcation again disassembles the differential pressure fluid level transmitter the calibrated span except needs, and installation again also needs again the vertical height between the installation site to be measured again; 4, temperature error is bigger.
Three, summary of the invention:
The present invention is in order to solve the weak point in the above-mentioned background technology, a kind of online portable multi-function intelligence Liquid density instrument is provided, it can temperature, the two-parameter bulk measurement of density, online and portable dual-purpose, intelligent degree height, the measuring accuracy height, measurement range is wide, Applicable media is wide, and is easy to use.
For achieving the above object, the technical solution used in the present invention is:
A kind of online portable multi-function intelligence Liquid density instrument, its special character is: comprise sensor and be attached thereto the intelligent display recording controller that connects, sensor comprises temperature sensor and the differential pressure pick-up that is made of top pressure sensor and base pressure sensor, and top pressure sensor and base pressure sensor detect up and down pressure respectively by isolation diaphragm.
Above-mentioned intelligent display recording controller comprises single-chip microcomputer, and single-chip microcomputer is connected with temperature sensor with pressure transducer respectively by A/D converter, and single-chip microcomputer also carries out the density change by D/A converter and send output and temperature change to send output.
Be connected with RS232 or RS485 communication interface on the above-mentioned single-chip microcomputer.
Above-mentioned single-chip microcomputer is connected with button by the keyboard display adapter.
Above-mentioned single-chip microcomputer is connected with power supply by power-supply controller of electric.
A kind of density measuring method of online portable multi-function intelligence Liquid density instrument, its special character is: the correction of the linear error of density sensor and temperature sensor, temperature error, non-pass amount error, exporting the linear equation that these two points constitute according to the output of zero value, zero-bit and full scale value, full scale respectively realizes, linear equation utilizes the eigenwert on 3～101 unique points on the actual curve, and actual curve is returned to theoretical value.
The exact value of above-mentioned density sensor and temperature sensor is the linear error that deducts sensor at the measured value of no correction situation lower sensor, the temperature error and the non-pass amount error of sensor.
Have the intelligent management module on the above-mentioned single-chip microcomputer, but the energy of its management system inside uses, working method by the parameter-definition system in the setup menu, complete machine enters dormant state automatically on one's own time, system awakens automatically when arriving the working time, finishes sampling, record, communication automatically by setting means.
Have communication driving module on the above-mentioned single-chip microcomputer, it is the subroutine that is used for the management communication mode, and communications parameter can pass through menu setting.
Have output control module on the above-mentioned single-chip microcomputer, output control module is to be used to manage become the subroutine of sending output and reporting to the police output, can send scope by the menu setting change, become and send object alarm set point return difference etc.
Compared with prior art, the advantage and the effect that have of the present invention is as follows:
1, density of the present invention, temperature biparameter one bulk measurement, the temperature survey function that it is additional, one side has improved the accuracy of density parameter, can save on the other hand in the spending of purchasing temperature sensor and display control unit and erected cost;
2, the online portable dual-purpose of the present invention, be used for the density of the fluent meterial of tank body or deep-well container being carried out online measurement and control in line style in industry spot, portable random measurement and the value storage that is used for various fluent meterials, portable volume is little, and electric housing external diameter is less than 90 millimeters, and feeler lever can be carefully to 20 millimeters, length is no more than 500 millimeters, little power consumption, built-in high capacity cell and mass storage are for field studies brings great convenience;
3, the intelligent degree height of the present invention, software function is powerful, menu in Chinese, high capacity storage;
4, precision height of the present invention, accuracy reaches 0.0004 gram/cubic centimetre, accurately digitized temperature compensation, full warm area temperature error is no more than 0.0006 gram/cubic centimetre, measures wide temperature region, probe maximum detection-40～+ 150 degree;
5, caliber of the present invention is thin, and it is convenient to install, and can be used for deep-well, and waterproof, protection against the tide, anti-joint reveal design, is fit to open-air and the high humidity environment operation;
6, the present invention has RS232 or RS485 interface, supports operations such as telecommunication, adjustment, printing, supports nearly this instrument group net operation of 128, No. 6 relays control output, multiple change send output signal to supply choosing, and dual power supply drives, and is not encouraged by internal cell when having outer the confession;
7, measurement range of the present invention is wide, and Applicable media is wide, can be used for measuring solution, solvent, pulp, crude oil, mud, ore pulp, mortar etc.
Four, description of drawings:
Fig. 1 is the structure principle chart of top of the present invention assembling structure;
Fig. 2 is the structure principle chart of side assembling structure of the present invention;
Fig. 3 is the structure principle chart of the two bar throw-in type structures of the present invention;
Fig. 4 is the structure principle chart of single pole throw-in type structure of the present invention;
Fig. 5 is circuit theory diagrams of the present invention;
Fig. 6 is a program flow diagram of the present invention.
Five, embodiment:
The present invention includes temperature-density sensor and intelligent display recording controller two parts, density probe principle is: top sensor and bottom sensor constitute differential pressure pick-up, top sensor and bottom sensor detect up and down pressure respectively by isolation diaphragm, vertical height between two diaphragms is H, by pressure differential between precision calibration top sensor and the bottom sensor and measurement H value, utilize the static pressure principle of fluent meterial: density=pressure/highly, again by burning at the software of single-chip microcomputer inside to linear error, temperature error and other non-pass amount error are carried out accurate rectification, realize the accurate measurement to density parameter.Referring to Fig. 1, be connected by mounting flange 6 between intelligent display recording controller 1 and the density sensor, density sensor comprises the bottom sensor of a top sensor and a side, top sensor has top membrane 2, bottom sensor has bottom film sheet 3, difference in height between top membrane 2 and the bottom film sheet 3 is H, built-in temperature sensor 5 in the encapsulation bar 4.Referring to Fig. 2, mounting flange 6 revolved turn 90 degrees, make side assembling structure as shown in Figure 2.Referring to Fig. 3, be connected with metallic cable or metallic shield waterproof and oilproof cable 7 with flange between intelligent display recording controller 1 and the temperature-density sensor, make two bar throw-in type structures as shown in Figure 3.Referring to Fig. 4, bottom sensor is placed the top sensor below, be electric conduit 8 between top sensor and the bottom sensor, make single pole throw-in type structure as shown in Figure 4.
Referring to Fig. 5, the intelligent display recording controller comprises single-chip microcomputer, program on the single-chip microcomputer can realize that linear error is proofreaied and correct, temperature error is proofreaied and correct and the amount error correction of non-pass, also be provided with intelligent management module, communication driving module and output control module on the single-chip microcomputer, configuration is the alarm relay control module of No. six relays nearly, utilize the signal of its output can drive power-equipment, for example the charging system of some industrial and mineral environment.Single-chip microcomputer is connected with temperature sensor with pressure transducer respectively with signal conditioning circuit by A/D converter, single-chip microcomputer also carries out the density change by D/A converter and send output and temperature change to send output, can provide changes such as 4～20mA, 0～10mA, 0～20mA, 0～5V, 1～5V, 0.5～4.5V to send output signal respectively to density, temperature parameter, output accuracy can reach 0.05% of setting range.In addition, also be connected with data-carrier store on the single-chip microcomputer, can carry out mass data storage, capacity can reach 16M.Be connected with keyboard-display unit on the single-chip microcomputer, can carry out the touring demonstration of five digit number, light beam demonstration, percentages show, unit demonstration, energy content of battery demonstration, fault alarm demonstration, and be connected with button by the keyboard display adapter.Single-chip microcomputer also is connected with the instrument power supply system by power-supply controller of electric.Single-chip microcomputer is provided with RS232 or RS485 communication interface, can be continuously or the startup communication function of being interrupted reads, the data of printing stored.The communication function support network operations allows nearly 128 instrument networkings operation, can read storage and real-time data by far-end computer, can also check, be provided with, revise the running parameter of each instrument.
Referring to Fig. 6, the correction of the linear error of density sensor and temperature sensor, temperature error, non-pass amount error, exporting the linear equation that these two points constitute according to the output of zero value, zero-bit and full scale value, full scale respectively realizes, this equation utilizes the eigenwert on 3～101 unique points on the actual curve, actual curve is returned to theoretical curve, its mathematic(al) representation is Y=kx+b, and wherein x is the output of sensor, and Y is a parameter value.The equation expression formula of error correction is Y
Mark=Y
Real-Δ Y
L-Δ Y
w-Δ Q, wherein Y
MarkBe the exact value of density or temperature sensor, Y
RealBe the measured value at no correction situation lower sensor, Δ Y
LBe the linear error of sensor, it is a tables of data of utilizing the deviation from linearity value of 3～101 points on the sensor measured curve to generate, can ask for the linear error of any point in the actual computation by tabling look-up, and gets how much determining according to actual conditions a little.Δ Y
wTemperature error for sensor, it is the tables of data that deviate that the temperature of last 3～101 points of two observed temperature curves (being zero-bit and full scale temperature curve) that utilize sensor causes generates, can ask for the temperature deviation of arbitrary state of temperature lower density sensor in the calculating by tabling look-up, get a little what and determine according to actual conditions.Δ Q is the general name of the deviation that causes with the irrelevant other factors of the measured physical quantity of sensor, promptly non-pass amount error, and its general performance is a constant.Intelligent management module on the single-chip microcomputer is the subroutine that a management system internal cell energy uses, can be by the working method of the parameter-definition system in the setup menu, the energy of power supply is monitored all the time, complete machine enters dormant state automatically on one's own time, system awakens automatically when arriving the working time, finishes sampling, record and communication automatically according to predefined mode.Communication driving module is one section subroutine that is used for the management communication mode, and communications parameter can pass through menu setting.Output control module is one section and is used to manage and becomes the subroutine of sending output and reporting to the police output, can become by menu setting and send scope and change to send object, alarm set point return difference etc., this subroutine only system has outside during power supply source just effectively.
Actual timing signal is packaged into the form of Fig. 1 to Fig. 3 with density sensor and temperature sensor, and the diameter of two diaphragms can be made 10～20 millimeters, also can be packaged into single tube structure shown in Figure 4 as required.Application standard pressure, temperature source are carried out high-precision calibration to instrument then, and calibration accuracy and standard source differ and can reach+/-1 word, and the density measure accuracy reaches 0.0004 gram/cubic centimetre.Signal according to Fig. 1 to Fig. 4 when industry spot is used is horizontally fixed on flange on chamber wall or the support, during portable uses feeler lever is inserted container, and the flange load is put above container, and the adjustment flange makes level.Connect outer power supply source when outer power supply source is arranged, battery-operated by instrument internal when not having outer power supply source or portable use started shooting then, and complete machine will be started working according to the measurement control mode of prior setting.
Claims (10)
1, a kind of online portable multi-function intelligence Liquid density instrument, it is characterized in that: comprise sensor and be attached thereto the intelligent display recording controller (1) that connects, sensor comprises temperature sensor and the differential pressure pick-up that is made of top pressure sensor and base pressure sensor, and top pressure sensor and base pressure sensor detect up and down pressure respectively by isolation diaphragm.
2, online portable multi-function intelligence Liquid density instrument according to claim 1, it is characterized in that: described intelligent display recording controller (1) comprises single-chip microcomputer, single-chip microcomputer is connected with temperature sensor with pressure transducer respectively by A/D converter, and single-chip microcomputer also carries out the density change by D/A converter and send output and temperature change to send output.
3, online portable multi-function intelligence Liquid density instrument according to claim 3 is characterized in that: be connected with RS232 or RS485 communication interface on the described single-chip microcomputer.
4, online portable multi-function intelligence Liquid density instrument according to claim 3, it is characterized in that: described single-chip microcomputer is connected with button by the keyboard display adapter.
5, online portable multi-function intelligence Liquid density instrument according to claim 4, it is characterized in that: described single-chip microcomputer is connected with power supply by power-supply controller of electric.
6, a kind of density measuring method of online portable multi-function intelligence Liquid density instrument, it is characterized in that: the correction of the linear error of density sensor and temperature sensor, temperature error, non-pass amount error, exporting the linear equation that these two points constitute according to the output of zero value, zero-bit and full scale value, full scale respectively realizes, linear equation utilizes the eigenwert on 3～101 unique points on the actual curve, and actual curve is returned to theoretical value.
7, the density measuring method of online portable multi-function intelligence Liquid density instrument according to claim 6 is characterized in that: the exact value of described density sensor and temperature sensor is the linear error that deducts sensor at the measured value of no correction situation lower sensor, the temperature error and the non-pass amount error of sensor.
8, the density measuring method of online portable multi-function intelligence Liquid density instrument according to claim 7, it is characterized in that: have the intelligent management module on the described single-chip microcomputer, but the energy of its management system inside uses, working method by the parameter-definition system in the setup menu, complete machine enters dormant state automatically on one's own time, system awakens automatically when arriving the working time, finishes sampling, record, communication automatically by setting means.
9, the density measuring method of online portable multi-function intelligence Liquid density instrument according to claim 8, it is characterized in that: have communication driving module on the described single-chip microcomputer, it is the subroutine that is used for the management communication mode, and communications parameter can pass through menu setting.
10, the density measuring method of online portable multi-function intelligence Liquid density instrument according to claim 9, it is characterized in that: have output control module on the described single-chip microcomputer, output control module is to be used to manage become the subroutine of sending output and reporting to the police output, can send scope by the menu setting change, become and send object alarm set point return difference etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03114657 CN1447106A (en) | 2003-04-21 | 2003-04-21 | Online portable multi-functional intellgence fluid density meters |
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| CN 03114657 CN1447106A (en) | 2003-04-21 | 2003-04-21 | Online portable multi-functional intellgence fluid density meters |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1325900C (en) * | 2003-11-27 | 2007-07-11 | 赵万山 | Digital display type liquefied petroleum gas density meter device |
| CN102000478A (en) * | 2010-10-29 | 2011-04-06 | 中国农业大学 | Dehumidification liquid regenerating method and device |
| CN103674772A (en) * | 2013-11-27 | 2014-03-26 | 安徽秋田电子有限公司 | Temperature compensation method for diesel oil density |
| CN107478542A (en) * | 2017-08-22 | 2017-12-15 | 广东江威传感科技有限公司 | One kind diffusion silicon density transmitter |
| CN111595725A (en) * | 2020-06-26 | 2020-08-28 | 顺德职业技术学院 | Liquid measuring method and measuring system |
-
2003
- 2003-04-21 CN CN 03114657 patent/CN1447106A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1325900C (en) * | 2003-11-27 | 2007-07-11 | 赵万山 | Digital display type liquefied petroleum gas density meter device |
| CN102000478A (en) * | 2010-10-29 | 2011-04-06 | 中国农业大学 | Dehumidification liquid regenerating method and device |
| CN103674772A (en) * | 2013-11-27 | 2014-03-26 | 安徽秋田电子有限公司 | Temperature compensation method for diesel oil density |
| CN103674772B (en) * | 2013-11-27 | 2015-10-28 | 安徽秋田电子有限公司 | The temperature compensation of diesel oil density |
| CN107478542A (en) * | 2017-08-22 | 2017-12-15 | 广东江威传感科技有限公司 | One kind diffusion silicon density transmitter |
| CN111595725A (en) * | 2020-06-26 | 2020-08-28 | 顺德职业技术学院 | Liquid measuring method and measuring system |
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Open date: 20031008 |