CN200947051Y - Flat-type digital intelligent charge level indicator - Google Patents
Flat-type digital intelligent charge level indicator Download PDFInfo
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- CN200947051Y CN200947051Y CN 200620021438 CN200620021438U CN200947051Y CN 200947051 Y CN200947051 Y CN 200947051Y CN 200620021438 CN200620021438 CN 200620021438 CN 200620021438 U CN200620021438 U CN 200620021438U CN 200947051 Y CN200947051 Y CN 200947051Y
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- utmost point
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Abstract
A plate type digital intelligence charge level indicator pertains to the technical field of charge level censoring. The charge level censoring and control device is an important link and requires better functions of the performance of the device. Charge level control device in existing control system has many limitations. The utility model comprises an operation panel (17), a function circuit penal (9) and a signal collection and mains panel (11) which all adopt S M T technology and are connected through bolts, the frequency signals are transformed into pulse signal through the signal collection penal (11), the pulse signal is sent to the C P U 89 C 55 of the function circuit panel (9) to calculate and before sent to the operation panel (17) to display pulse count with four digital digitron. The utility model is suitable to be applied to monitor the charge level in sealed container with materials with serious friction on the wall, interfere of static and large fluctuation of temperature. Such containers includes the dedusting hopper and desulfurizing device in fuel electric plant and run coal bin and dust coal bin of steelworks.
Description
Technical field:
The utility model relates to a kind of level-sensing device that material changes that detects.
Background technology:
In the process of industrial and agricultural production robotization, it is a very important link that control instrument is detected in the thing position, more and more higher, there is different limitation in use in the thing position control instrument (as condenser type, resistance-type, electric contact, photo-electric, pressure type, tuning-fork type, ultrasound wave, ray type etc.) that uses in the control system now to the requirement of instrument function.For example: the ray type level meter pollutes to some extent to environment, and capacitive level probe is afraid of material wall built-up in the container, and the ultrasonic type level meter is to having relatively high expectations of the measured object interface in the container or the like, and these problems have hindered the use and the development of instrument to a certain extent.
Radio frequency admittance admittance position measuring instrument is present popular in the world novel measuring instrument, the radio frequency admittance admittance position measuring instrument of domestic existing analog quantity detection mode, but in application process, there is certain shortcoming in aspects such as anti-material wall built-up ability, sensitivity, electrostatic prevention interference and parameter adjustment.
Summary of the invention:
The purpose of this utility model provides a kind of in order to overcome the difficult problem that existing radio frequency admittance admittance position instrument measurement minor diameter container material detects, it is core with the single-chip microcomputer that the utility model provides a kind of, the dull and stereotyped level-sensing device of surveying utmost point design, it is little that this level-sensing device has not only solved the interior material contact area of short distance container, the difficult problem that the media variations amount is little, and solved the influence of material wall built-up, electrostatic interference to measurement result.
Above-mentioned purpose realizes by following technical scheme:
Flat digital intelligent level-sensing device, its composition comprises: comprise operation panel (17), function wiring board (9), signals collecting and power panel (11), all adopt the SMT technology, the three connects by bolt, and frequency signal converts pulse signal to through signal acquiring board (11), and pulse signal is sent into the CPU of function wiring board (9), and (the 89C55 computing is transferred to operation panel (17) again and shows umber of pulse with group of four figures pipe.
Described flat digital intelligent level-sensing device; 51 series monolithic 89C55 are adopted in described function wiring board (9) CPU s operation control part this part, show that output adopts ZLG7289 as displaing core, the Power Supply Monitoring part; adopt CAT1023, as the protective device of device steady operation.
Described flat digital intelligent level-sensing device, described signals collecting, adopting integrated operational amplifier TLV2624 is the oscillator that core parts constitute, described power panel comprises power supply, import by alternating current 220V, the transformer access to plant of 6V and the output of 12V two-way, relay output receives CPU by transmission cable and flows to NE555, come pilot relay by NE555, by relay output switching value, be connected with the pulpit, form closed-loop control.
Described flat digital intelligent level-sensing device; the described detection utmost point adopts dull and stereotyped contact design; surveying the utmost point adopts three electrode technologies to be made of the main utmost point, the auxiliary detection utmost point and the shielding ground surveyed; main detection utmost point signal and the auxiliary utmost point signal of surveying are by collection of two-way phoenix terminal entering signal and power panel (11), and what link to each other with protecting sheathing is to survey the utmost point.
The beneficial effects of the utility model:
1. adopting single-chip microcomputer is core, the numeral calibration technique, the dull and stereotyped design of surveying the utmost point, the application of TVS Transient Voltage Suppressor disturbing line, not only solved the little difficult problem of minor diameter container material variable quantity, avoided the influence of material wall built-up, fluffy ash and electrostatic interference simultaneously measurement result.
2. solved the little influence of minor diameter container material variable quantity, between potential electrode and earth polar, added guarded electrode, potential electrode has been protected, not influenced by bridging, made measurement result more accurate measurement result.
3. solve the debugging problem of exempting from of instrument.Determine rational analytical approach by testing, make instrument when initial the installation, to carry out discriminatory analysis to environmental factor automatically, need not wait for adding the parameters setting that material can be finished instrument; Analyze by environmental impact, set up the mathematical model of adaptive control measure field.Thereby effectively eliminate the measuring error that environmental change causes, the error of accumulation is dynamically adjusted running parameter in especially long-time the measurement, has improved meter sensitivity.
4. solve instrument electrostatic interference problem.By adopting the TVS Transient Voltage Suppressor, when instrument is used in having the place of strong static, avoided static to the damage of the electron device of instrument and to the influence of measurement result, improve the serviceable life and the reliability of instrument.
5. it is to make the detection utmost point with the high-quality Stainless Steel, and PFA is high, and corrosion-resistant material is made insulating protective layer, and structures such as cast aluminium host shell constitute.With the single-chip microcomputer is the core processing function, surveys the utmost point and adopts integral type to be connected with host machine part, adds guarded electrode between potential electrode and earth polar, add antistatic interfered circuit between each utmost point, by the combination of above design, make instrument have disposable parameter calibration, electricity is rewritten E
2The PROM external memory is never lost data; the data cut-off protection function; the instrument dead electricity is powered and is changed the measurement state automatically over to; switching value output and RS485 serial data communication interface are provided; can realize closed-loop control; the influence of anti-material wall built-up, electrostatic interference is surveyed utmost point environment for use temperature and can be reached characteristics such as 200 ℃.
6. flat digital intelligent level-sensing device is to be core with the single-chip microcomputer, adopts the Digital Detecting mode, and digital calibration technique is carried out disposable parameter calibration, and electricity is rewritten E
2The PROM external memory, data are never lost, and switching value output and RS485 serial data communication interface are provided, and can realize closed-loop control.Flat board is surveyed the design of the utmost point, solved the little difficult problem of minor diameter container variable quantity, TLV2624 amplifying circuit design and the design of TVS Transient Voltage Suppressor solved a little less than material wall built-up, the signal transmission and electrostatic interference to the influence of measurement result, make instrument reach requirement high temperature resistant, corrosion-resistant, dustproof, anti-wall built-up.The LED charactron shows, improves measuring accuracy, and is simple to operate, the debugging intuitive and convenient.Because the influence that the anti-wall built-up function of this instrument and flat incorporate design philosophy make instrument not changed by the parameters such as density, grain size, chemical constitution, deposition viscosity and conductive characteristic of material, high temperature, high pressure and corrosivity material checkout area institute can be applied to, the detection of all kinds of storage materials can be widely used in.
Utilize radio frequency admittance technology, single-chip microcomputer in use to demonstrate unique function for the thing position measuring instrument that technology such as process chip, SMT mount technology, electrostatic interference circuit combine.
7. operation panel (17) plate function: the function of man-machine interaction is mainly realized in this part, is made of button and pilot lamp.By button, can carry out threshold setting to device, delay time is set, and the sampling time is set.The output state that pilot lamp produces according to the computing of CPU process, judgement in the function wiring board provides corresponding light on and off indication, and the present device of prompting is in to be had, no material state.Threshold setting method is seen accompanying drawing 9
More can be clearly corresponding for the function that makes corresponding component, the function of partial component and advantage record here no longer repeat in an embodiment.
Description of drawings:
Accompanying drawing 1 is the structural representation of this product.
Accompanying drawing 2 is circuit theory diagrams of the present utility model.
Embodiment 1:
The structure of flat digital intelligent level-sensing device is made up of master's detection utmost point 1, insulation course 2, the auxiliary detection utmost point 3, insulation course 4, pair detection utmost point 5, screw thread 6, cushion rubber 7, housing 8, function wiring board 9, cushion rubber 10, power circuit plate 11, bonnet 12, screw 13, joint pin 14, entrance hole 15, cable 16, controller function plate 17 as shown in Figure 2.Wherein: the main utmost point 1 of surveying adopts dull and stereotyped stainless steel disk; The auxiliary utmost point 3, the secondary utmost point 5 employing stainless-steel tubes of surveying surveyed; Insulation course 2, insulation course 4 is high temperature resistant by PFA, corrosion-resistant material constitutes, and screw thread 6 is to install to use screw thread; Cushion rubber 7 and cushion rubber 10 are O-ring seals; Housing 8, bonnet 12 are to be made of cast aluminium; Function operation board 9 is to be made of oscillator and CPU; Signals collecting, power panel 11 are to be made of Switching Power Supply, LED demonstration, signals collecting, output contact; Signal is transferred to signal acquiring board 11 by concentric cable 18, and joint pin 14 is used for fixing function operation board 9 and signals collecting, power panel 11 operation panels 17; Entrance hole 15, cable 16 are delivered to control system with the switching value output signal.
Principle of work:
After flat digital intelligent level-sensing device is installed energising, instrument enters duty, oscillator produces a fixed frequency signal by the decision of measured medium admittance value, the frequency of this frequency signal and measured object admittance value are inversely proportional to, frequency signal converts pulse signal to through signal acquiring board 11, and the CPU89C55 computing that pulse signal is sent into function wiring board 9 is transferred to operation panel 17 usefulness group of four figures pipes demonstration umber of pulse again.When the detection utmost point did not contact measured object, the frequency signal of oscillator was delivered to CPU through shaping and is carried out outputing to the no material value of operation panel LED demonstration after the data processing.When surveying utmost point contact material, the LED of operation panel 17 shows material numerical value.The difference of this two value is exactly the frequency variation that is changed by the measured object admittance value, utilizes the adjusting key on the operation panel 17 can set a numerical value, promptly exports the threshold value of switching value.Corresponding different material situation HD, LD shows state accurately, and exports different switching values.
Circuit board structure is formed, and the device design concept is seen accompanying drawing 1 and accompanying drawing 3.
This device adopts three layers of wiring board design in protecting sheathing, comprise operation panel 17, function wiring board 9, and signals collecting and power panel 11 all adopt the SMT technology, and the three connects by bolt, by the concentric cable transmission signals.Survey the utmost point and be connected with signals collecting and power panel 11 by lead, the main utmost point signal of surveying is gathered and power panel by two-way phoenix terminal entering signal with the auxiliary utmost point signal of surveying.What link to each other with protecting sheathing is the detection utmost point, surveys the utmost point and is surveyed the utmost point, constituted with assisting the detection utmost point and shielding by the master.
Operation panel 17 plates constitute: this part mainly is made of Resistor-Capacitor Unit and button.
Function wiring board 9 constitutes:
(1) CPU s operation control part
51 series monolithic 89C55 are adopted in this part, as the s operation control core, the cost performance of 89C55WD single-chip microcomputer is very high, that sheet includes the 20KB flash is able to programme/wipe storer, 256BRAM, 32 T/O mouths, 3 16 bit timings/counters, 6 interrupt sources, two priority structures can satisfy matching requirements.It mainly realizes following function:
1, provides accurate timer for systematic survey;
2, obtain detector signal by counter T0, and it is carried out data processing;
3, the work of control display chip zlg7289.
4, realization and panel human-computer interaction function carry out the modification and the storage of parameter.
5, pilot relay and panel leds.
6, Simulation with I
2C interface, the work of control Power Supply Monitoring protection chip.
(2) show output
This part adopts ZLG7289 as displaing core, realizes LED decoding, drive circuit functionality, and its interface adopts popular synchronous serial Peripheral Interface, can link with any single-chip microcomputer, and can drive 8 LED simultaneously; The chip Presentation Function is powerful, mainly finishes pulse data demonstration and control pilot lamp.This chip has the stability of height, can ensure LED charactron steady operation under the environmental baseline condition of severe.
(3) Power Supply Monitoring part
CAT1023 is adopted in this part, as the protective device of device steady operation.When external environment instability or electrostatic interference caused instrument torpor to occur strongly, the main ensuring equipment of the employing of this part can recover operate as normal voluntarily.This chip has memory function in addition, and it also is the electro erasible programmable serial storage, have that volume is little, special I/O mouth less, cheap, advantage such as circuit is simple, it supports I
2C bus data transportation protocol, the self-timing writing cycle able to programme; Two kinds of byte writing mode and page or leaf writing modes are arranged; In addition, this chip has noise protection schmidt trigger input technology, and assurance chip data under extremely strong interference are not lost.
(4) components and parts part
The devices that meet the SMT technological requirement are all adopted in this part, are high-performance, and low temperature floats, and high-quality capacitance resistance component can effectively reduce the spuious characteristic of components and parts, has guaranteed the stability of device work.
Function wiring board (9) function:
The collection to signal has mainly been realized as the core of device in this part, analyzes, and handles the output control operation.Software section adopts top-down program design thinking, the thought that modularization programming and structured programming combine according to the principle of design of intelligence instrument, device has been realized self diagnosis on function, some practicality operations such as selfreparing have been contained ROM, RAM in the adaptive control program, plug-in unit, start, bus, input channel, many-sided detections such as keying self check and periodicity self check have guaranteed that the reliability of instrument is used.Aspect data processing, adopt the arithmetic mean filter method, with the accuracy that guarantees to measure.The design that switch in the range zone, the stability when having guaranteed instrumentation.
Signals collecting and power panel constitute and function:
Signals collecting and power panel constitute:
(1) signals collecting
Adopting integrated operational amplifier TLV2624 is the pierce circuit that core parts constitute.Integrated operational amplifier TLV2624 temperature is floated less, and its working temperature is-55 ℃～125 ℃, 5uV/ ℃ of voltage temperature drift.Sensor is the core of whole device, the measurement index of the fine or not direct relation auto levelizer of its performance, and surveying the factor that extremely measurement is had the greatest impact is exactly temperature and electrostatic interference, and the apolegamy of Resistor-Capacitor Unit also is the key of amplifier reliably working.
Before entering amplifier, the signal of surveying utmost point collection installs the electrostatic prevention circuit additional, i.e. the TVS Transient Voltage Suppressor.When in having the place of strong static, using,,, even cause the damage of device itself even charging into of general spike pulse noise also can cause the misoperation of electronic equipment and computer if do not take safeguard measure will cause damage.Therefore adopt the TVS Transient Voltage Suppressor, eliminate the influence of thunder and lightning interference and generation of static electricity voltage, thereby stablizing of protection electronic circuit improves the reliability and the serviceable life of electronic equipment, guarantees the high-quality of device measurement result.
(2) power supply
Our department is divided into device provides the direct supply support.External world's power supply is imported by 1 road alternating current 220V, the transformer access to plant of 6V and the output of 12V two-way, and the voltage of output will be through overcommutation, filtering, after the voltage stabilizing, carrying by transmission cable can operate as normal for wiring board use wiring board.
(3) relay output
Receive CPU by transmission cable and flow to NE555, come pilot relay,, be connected, form closed-loop control with the pulpit by relay output switching value by NE555.
Signals collecting and power panel major function:
Extraneous AC power is passed through transformation, rectification, and filtering is delivered to wiring board by transmission cable after the voltage stabilizing, for instrument provides the working power support.By operational amplifier the signal of surveying the level collection is vibrated and processing and amplifying, the signal after handling is handled by the CPU that transmission cable is delivered to the function wiring board, the signal after the processing sends the actuating signal that NE555 drives relay to.
Claims (5)
1. flat digital intelligent level-sensing device, its composition comprises: comprise that operation panel (17) is characterized in that: function wiring board (9), signals collecting and power panel (11), all adopt the SMT technology, the three connects by bolt, frequency signal converts pulse signal to through signal acquiring board (11), and the CPU computing that pulse signal is sent into function wiring board (9) is transferred to operation panel (17) again and shows umber of pulse with group of four figures pipe.
2. flat digital intelligent level-sensing device according to claim 1; it is characterized in that: 51 series monolithic 89C55 are adopted in described function wiring board (9) CPU s operation control part this part; show that output adopts ZLG7289 as displaing core; the Power Supply Monitoring part; adopt CAT1023, as the protective device of device steady operation.
3. flat digital intelligent level-sensing device according to claim 1 and 2, it is characterized in that: described signals collecting, adopting integrated operational amplifier TLV2624 is the oscillator that core parts constitute, described power panel comprises power supply, import by alternating current 220V, the transformer access to plant of 6V and the output of 12V two-way, relay output, the operational data that receives CPU by transmission cable flows to NE555, come pilot relay by NE555, by relay output switching value, be connected with the pulpit, form closed-loop control.
4. flat digital intelligent level-sensing device according to claim 1 and 2; it is characterized in that: the described detection utmost point adopts dull and stereotyped contact design; surveying the utmost point adopts three electrode technologies to be made of the main utmost point, the auxiliary detection utmost point and the shielding ground surveyed; the master surveys the level signal and gathers and power panel (11) by two-way phoenix terminal entering signal with assisting detection level signal, and what link to each other with protecting sheathing is the detection utmost point.
5. flat digital intelligent level-sensing device according to claim 3; it is characterized in that: the described detection utmost point adopts dull and stereotyped contact design; surveying the utmost point adopts three electrode technologies to be made of the main utmost point, the auxiliary detection utmost point and the shielding ground surveyed; main detection grade signal and the auxiliary utmost point signal of surveying pass through collection of two-way phoenix terminal entering signal and power panel (11), and what link to each other with protecting sheathing is to survey the utmost point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620021438 CN200947051Y (en) | 2006-08-14 | 2006-08-14 | Flat-type digital intelligent charge level indicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620021438 CN200947051Y (en) | 2006-08-14 | 2006-08-14 | Flat-type digital intelligent charge level indicator |
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| Publication Number | Publication Date |
|---|---|
| CN200947051Y true CN200947051Y (en) | 2007-09-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620021438 Expired - Fee Related CN200947051Y (en) | 2006-08-14 | 2006-08-14 | Flat-type digital intelligent charge level indicator |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103512632A (en) * | 2012-06-29 | 2014-01-15 | 罗斯蒙特储罐雷达股份公司 | Pulsed level gauge system with temperature-based control of pulse repetition frequency |
| CN104457909A (en) * | 2014-12-23 | 2015-03-25 | 上海雄风自控工程有限公司 | Intelligent radio frequency admittance controller |
| CN104615023A (en) * | 2014-12-31 | 2015-05-13 | 重庆川仪自动化股份有限公司 | Intelligent setting method for level switch |
| CN110268235A (en) * | 2016-12-19 | 2019-09-20 | 恩德莱斯和豪瑟尔欧洲两合公司 | Electronic vibration sensor with interference compensation |
| CN112945350A (en) * | 2021-02-01 | 2021-06-11 | 重庆四联测控技术有限公司 | Radio frequency admittance flat-plate type level sensor |
-
2006
- 2006-08-14 CN CN 200620021438 patent/CN200947051Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103512632A (en) * | 2012-06-29 | 2014-01-15 | 罗斯蒙特储罐雷达股份公司 | Pulsed level gauge system with temperature-based control of pulse repetition frequency |
| CN103512632B (en) * | 2012-06-29 | 2018-02-16 | 罗斯蒙特储罐雷达股份公司 | Pulse level gauge system based on temperature control pulse repetition rate |
| CN104457909A (en) * | 2014-12-23 | 2015-03-25 | 上海雄风自控工程有限公司 | Intelligent radio frequency admittance controller |
| CN104615023A (en) * | 2014-12-31 | 2015-05-13 | 重庆川仪自动化股份有限公司 | Intelligent setting method for level switch |
| CN104615023B (en) * | 2014-12-31 | 2018-04-27 | 重庆川仪自动化股份有限公司 | Intelligent setting method for level switch |
| CN110268235A (en) * | 2016-12-19 | 2019-09-20 | 恩德莱斯和豪瑟尔欧洲两合公司 | Electronic vibration sensor with interference compensation |
| US10928240B2 (en) | 2016-12-19 | 2021-02-23 | Endress+Hauser SE+Co. KG | Vibronic sensor with interference compensation |
| CN110268235B (en) * | 2016-12-19 | 2021-12-21 | 恩德莱斯和豪瑟尔欧洲两合公司 | Method and device for determining and/or monitoring at least one process variable of a medium |
| CN112945350A (en) * | 2021-02-01 | 2021-06-11 | 重庆四联测控技术有限公司 | Radio frequency admittance flat-plate type level sensor |
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Legal Events
| Date | Code | Title | Description |
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| 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: 20070912 Termination date: 20090914 |