CN1244036C - Glass bulb slurry level-concentration control system - Google Patents
Glass bulb slurry level-concentration control system Download PDFInfo
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- CN1244036C CN1244036C CN 03153218 CN03153218A CN1244036C CN 1244036 C CN1244036 C CN 1244036C CN 03153218 CN03153218 CN 03153218 CN 03153218 A CN03153218 A CN 03153218A CN 1244036 C CN1244036 C CN 1244036C
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- liquid level
- concentration
- control system
- measuring head
- pulp density
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Abstract
The present invention relates to a liquid level and concentration control system of glass envelope slurry, which belongs to the fields of detection and control in industrial production process. The present invention comprises a measuring head positioned at the front end and a monitoring and display instrument positioned at the back end, wherein the measuring head comprises two pressure sensors positioned at different height, the front end of the sensor is provided with an elastic sensing element film which has the characteristic of anti-adhesion, the measuring head is connected with a measurer by a feeder to carry out measurement, calculation and output, and the measurer is provided with a single chip computer, a CPU, an A/D and D/A converter and an LCD display. The control system of the present invention realizes scientific monitoring and control to the concentration and the liquid level of the glass envelope slurry by intelligent signal processing so as to make the slurry concentration and the liquid level parameters totally stable, improve the production quality and achieve the requirements for digital management.
Description
Technical field
The invention belongs to industrial processes and detect the control field, specially refer in kinescope glass shell is produced glass bulb slip position liquid, concentration control system.
Background technology
On the kinescope glass shell production line, in order to enhance productivity, improve the quality of products and reduce production costs, the workshop is from lowering abrasive material consumption, system carries out digitized scientific management to the glass slip, slurry technology is accomplished Digital Control, realize the level stability of pulp density and kiln basin liquid, guarantee that pulp density is stable in process of lapping, measurement is in the past measured pulp density by centrifugal eddy flow machine, and because artificial uneven reinforced, be to concentrate each hour to add a defective material, all (granularity from large to small in variation for the granularity of abrasive and grinding capacity in this hour, grinding capacity is by dying down by force), and cause tear drop slurry fluctuation of concentration big, the waste of Grinding Quality fluctuation and slurry.In order to make pulp density and liquid level obtain the control of accurate robotization at any time, the inventor is through repeatedly in-site measurement, experiment and constantly sum up, and develops a kind of digital control system that can automatic monitoring system slip parameter, the digital management of realization science.From technical assignment, implement to and at first will solve density transformer with electric signal output, for present situation in domestic and the factory, selection pressure formula density is the most feasible, intelligent object in its indicator gauge, when providing the density value of measurement point, also can provide the real-time height of liquid level, super liquid level warning function is provided, on the entire machine design of this control system, to solve the particular problem aspect two, the one, the manufacturing technology that have the slight pressure of high stable, anti-stick company to close, the 2nd, for the intelligent treatment technology of signal.
Summary of the invention
The technical issues that need to address of the present invention, be in the present prior art, in the glass bulb production run, lack angles of science monitoring and control to glass bulb pulp density, liquid level, rely on and manually feed in raw material and control, can't obtain stable slip parameter, in order to overcome this backward state, the control of improving the quality of products will design a kind of automatic control system of utilizing the intelligent signal processing module to constitute.In order to reach this purpose, realize by the following technical solutions, a kind of glass bulb slip liquid level, concentration control system, comprise the measuring head that is positioned at front end and monitoring, the Displaying Meter of rear end, it is characterized in that, measuring head comprise two be positioned at differing heights, be provided with the pressure transducer of anti-blocking characteristics elastic sensing element film at its front end, this measuring head is connected to one by feeder line and is equipped with in surveying instrument singlechip CPU, A/D, D/A converter and LCD display and LCD display and measures computing and output.The elastic sensing element film of described sensor front end, it is to adopt the little sealing by fusing connection technology of sapphire to make.The sapphire diaphragm inboard is the depositing metal electrode at high temperature, form presser sensor electric capacity, because the gap between two pole plates of this electric capacity is minimum, about 10 μ m, so the effect of extraneous slight pressure causes the diaphragm micro-displacement, can obviously change this capacitance, reach highly sensitive effect under the minute-pressure power, the sapphire wear resistance is splendid, and sensitization capacitance internal electrode figure rationally distributes and flexible sheet supporting point position reasonable disposition makes this sensitive element have anti-blocking characteristics.When side gets high and low level sensor apart from liquid level L
1, L
2After, draw high position sensor output pressure indicated value P
1=kmL
1G, low sensors output pressure indicated value P
2=kmL
2G, wherein the fluid density value is m, the conversion coefficient of analog signal converter is k, because k, Δ L (L
2-L
1=Δ L) and gravity acceleration g be given value, intelligent object can obtain fluid density value m according to Δ P value, and then according to P
2Or P
1Can obtain the liquid level value.Describedly in surveying instrument, measure, computing and output, they comprise that a. measures pulp density in the kiln basin, concentration automatically, realize that the digitizing of pulp density, concentration dynamically shows; B. with keyboard to set up pulp density, concentration technology band, the upper and lower alarm bit of engineering variable is set, when pulp density, concentration exceed this alert position, then report to the police automatically; C. according to pulp density, concentration change, output 4-20mA current signal is controlled other equipment as required, and as the operation of charger, d. measures slip liquid level height automatically, realizes that the digitizing of slip liquid level dynamically shows; E. use the high low parameter of keyboard to set up slip liquid level, the upper and lower alarm bit of engineering variable is set,, then report to the police automatically when the slip liquid level exceeds this alert position; F. according to the slip liquid level change, output 4-20mA current signal is controlled other equipment, as required as the operation of water valve; That described surveying instrument has is high temperature resistant, humidity, corrosion-resistant, anti-ly wash away, long-life performance.The invention has the beneficial effects as follows that this control system has realized angles of science monitoring and control to glass bulb pulp density and liquid level by intelligent signal processing, pulp density, liquid level parameter all can be stablized, improved product quality, reached the digital management requirement.
Description of drawings
Fig. 1 is measuring head and surveying instrument annexation synoptic diagram.
Fig. 2 forms block scheme for surveying instrument.
Fig. 3 is power circuit principle figure.
Fig. 4 is digital display circuit figure.
Fig. 5 is computing circuit figure.
Fig. 6 is analog to digital conversion circuit figure.
Embodiment
With reference to Fig. 1, the slight pressure measuring head 1 of expression high stable, anti-stick company and the annexation synoptic diagram of surveying instrument 2 contain 2 sensors that are in the slip, L in the measuring head 1
1High position sensor 1.1, and L
2Low level level sensor 1.2, measuring head is connected in the surveying instrument 2 by feeder line 3, and this surveying instrument 2 includes the display screen 2.1 on the panel, the keyboard 2.2 that is provided with previously, and being contained in each inner wiring board, they are respectively power circuits 2.3, digital display circuit 2.4, computing circuit 2.5, and D/A converting circuit 2.6, the annexation of each circuit is illustrated in the block scheme of Fig. 2, and other each circuit are illustrated respectively among Fig. 3-Fig. 6.
Claims (3)
1. a glass bulb slip liquid level, concentration control system, comprise the measuring head that is positioned at front end and monitoring, the Displaying Meter of rear end, it is characterized in that, measuring head comprise two be positioned at differing heights, be provided with the pressure transducer of anti-blocking characteristics elastic sensing element film at its front end, this measuring head is connected in the surveying instrument that singlechip CPU, A/D, D/A converter and LCD display be housed by feeder line and measures computing and output.
2. control system according to claim 1, it is characterized in that, the elastic sensing element film of described sensor front end, it is to adopt the little sealing by fusing connection technology of sapphire to make, this sapphire diaphragm inboard is the depositing metal electrode at high temperature, form presser sensor electric capacity, the gap between two pole plates of this electric capacity is little of 10 μ m levels.
3. control system according to claim 1 is characterized in that, describedly measures in surveying instrument, computing and output, and they comprise that a. measures pulp density in the kiln basin, concentration automatically, realize that the digitizing of pulp density, concentration dynamically shows; B. with keyboard to set up pulp density, concentration technology band, the upper and lower alarm bit of engineering variable is set, when pulp density, concentration exceed this alert position, then report to the police automatically; C. according to pulp density, concentration change, output 4-20mA current signal is controlled the operation of charger as required, and d. measures slip liquid level height automatically, realizes that the digitizing of slip liquid level dynamically shows; E. with the high low parameter of keyboard to set up slip liquid level, the upper and lower alarm bit of engineering variable is set,, then reports to the police automatically when the slip liquid level exceeds this alert position; F. according to the slip liquid level change, output 4-20mA current signal is controlled the operation of water valve as required.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03153218 CN1244036C (en) | 2003-08-08 | 2003-08-08 | Glass bulb slurry level-concentration control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03153218 CN1244036C (en) | 2003-08-08 | 2003-08-08 | Glass bulb slurry level-concentration control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1489014A CN1489014A (en) | 2004-04-14 |
| CN1244036C true CN1244036C (en) | 2006-03-01 |
Family
ID=34156647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03153218 Expired - Fee Related CN1244036C (en) | 2003-08-08 | 2003-08-08 | Glass bulb slurry level-concentration control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1244036C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322897A (en) * | 2011-08-27 | 2012-01-18 | 蚌埠迅科自控有限公司 | Intelligent slurry density and liquid level integrative analysis instrument and analysis method |
| CN102778255A (en) * | 2012-07-12 | 2012-11-14 | 西安交通大学 | High-precision liquid level, temperature, density multifunctional measuring system |
| CN104655526A (en) * | 2014-12-01 | 2015-05-27 | 江门天诚溶剂制品有限公司 | Liquid level and density measuring method of liquid material in chemical engineering storage tank |
-
2003
- 2003-08-08 CN CN 03153218 patent/CN1244036C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1489014A (en) | 2004-04-14 |
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| CF01 | Termination of patent right due to non-payment of annual fee |