CN2094052U

CN2094052U - Intelligent pressure gauge of bar extruder

Info

Publication number: CN2094052U
Application number: CN 91217262
Authority: CN
Inventors: 林土胜; 潘湘文
Original assignee: South China University of Technology SCUT
Current assignee: South China University of Technology SCUT
Priority date: 1991-07-01
Filing date: 1991-07-01
Publication date: 1992-01-22

Abstract

The utility model relates to an intelligent pressure gauge of bar extruder which belongs to the digital automatic monitoring and controlling device, comprising a transducer-conditioning circuit, an analog-to-digital conversion circuit, a symmetrical stabilized voltage power supply, a miniature printer, a peripheral interface circuit, a CPU system, a keyboard management and display circuit, a control circuit for alarming and overloading, etc. The utility model overcomes the defects in the existing pressure balance such as low resolution, few functions, frailty, frightened shock, rapid wear, etc. The keypad is used to operate and manage; the digital display is accomplished for the pre-set pressure and the real time pressure; the utility model has various functions such as observation by air-loading, overpressure alarm, forced stoppage, data printing, etc., which can cause the over-all performance of the bar extruder to upgrade to the digitized, intelligent, and automatic grade.

Description

Intelligent pressure gauge of bar extruder

The utility model---the banded extruder intelligent pressure gauge belongs to technical field of automatic control, particularly digitizing monitoring and control automatically.

Existing electronic pointer manometric balance, its set pressure need manually pointer is pushed required location of reading, and real-time pressure then is mobile by the electrodynamic type pointer, reads from the rough segmentation scale.Its except resolution low and function few, also exist fragile, be afraid of serious problems such as shake, rapid wear, it is malfunctioning usually to work after the journey transportation, causes the banded extruder can't operate as normal.

The purpose of this utility model be for solve the problem that above-mentioned prior art exists and overcome that the resolution that existing electronic pointer manometric balance exists is low, function is few, fragile, be afraid of shortcomings such as shake, rapid wear, provide a kind of resolution height, function is many, convenient, flexible, digitizing detects automatically and the banded extruder intelligent pressure gauge controlled automatically.

The utility model is achieved through the following technical solutions.Below in conjunction with accompanying drawing, the architectural feature and the principle of work of this pressure instrument is described below: banded extruder intelligent pressure gauge principle of work block scheme as shown in Figure 1.This pressure instrument is made of jointly metal chassis, printed circuit board (PCB), mini-printer, operation and display panel, wherein, this pressure instrument circuit by sensor modulate circuit (1), touch transformation of variables circuit (2), symmetrical stabilized voltage supply (3), peripheral interface circuit (5), CPU minimum system (6), keyboard management and display circuit (7), report to the police to interconnect successively and form with the control circuit (8) that overloads.Its simple principle of work is: the working pressure of banded extruder is delivered to sensor modulate circuit (1) by gear train, realize of the conversion of pressure simulation amount by touching transformation of variables circuit (2) again, and then be input to CPU minimum system (6) via peripheral interface circuit (5) and carry out data processing digital quantity.Simultaneously, CPU minimum system (6) processs and displays the initialize data that is transported by keyboard management and display circuit (7), and the warning after will handling and overload control signal are delivered to and reported to the police and the control circuit (8) that overloads is reported to the police and reminded operator's release; Simultaneously, also can realize the literal print record by mini-printer (4).And sensor modulate circuit (1) is independently-powered by symmetrical stabilized voltage supply (3), to improve its job stability and antijamming capability.

The panel construction synoptic diagram of banded extruder intelligent pressure gauge and circuit theory diagrams thereof are respectively as shown in Figures 2 and 3.Sensor modulate circuit circuit (1) is by integration member IC ₁, resistance R ₁～R ₁₄, potentiometer W ₁～W ₂, potentiometer W ₁～W ₂, capacitor C ₁～C ₃The common composition, wherein, R ₁～R ₄Decomposition pressure strain transducer bridge circuit, its output terminal inserts by R ₅～R ₇, W ₁R is passed through at the resistive networking of forming of zeroing again ₈And R ₉With by R ₁₀～R ₁₄, C ₁～C ₂, W ₂The IC that forms from steady zero formula operational amplifier ₁Positive and negative input end be connected, IC ₁Positive and negative power end through R ₁₂And R ₁₃Respectively with by transformer BT, diode d ₂～d ₇, electrochemical capacitor C ₁₃～C ₁₇, the positive and negative symmetrical stabilized voltage supply (3) formed of three terminal integrated voltage stabilizer 7805,7905 parallel-seriess output terminal V ₊And V _-Be connected IC ₁Output terminal via R ₁₄, W ₂The full scale trim network of forming reaches by C ₃, R ₁₇, C ₇The low-pass filter of forming with touch the IC of transformation of variables circuit (2) ₃Signal input part IN be connected; Touch transformation of variables circuit (2) by IC ₂～IC ₄, R ₁₅～R ₁₉, C ₄～C ₇, C ₁₉The common composition, wherein, IC ₂, R ₁₅, W ₃Voltage-reference is formed in parallel-series, and it is exported through W ₃With IC ₃V _REnd is connected, IC ₃Clock signal input terminal CLR with by R ₁₈～R ₁₉, C ₁₉, IC ₄The IC of the clock-signal generator that connection in series-parallel is formed ₄Output terminal be connected IC ₃Digital signal output end B ₁～B ₈, D ₁～D ₄Respectively with peripheral interface circuit IC ₅Input port PA ₀～PA ₇Be connected IC ₅Delivery outlet PB ₀～PB ₇Respectively with the data input port D of mini-printer PRINTER ₀～D ₇Be connected IC ₅Reset terminal RST with by K ₁, R ₂₀, C ₈The reset circuit that composes in parallel is connected, IC ₅Data output D ₀～D ₇Respectively with by IC ₆, IC ₈, IC ₉The IC of the CPU minimum system that parallel-series is formed ₆Data port PO ₀～PO ₇Be connected IC ₆Delivery outlet P1 ₄, P1 ₂, P1 ₁, respectively with BG ₂, BG ₄, BG ₅, R ₂₄, R ₂₅, R ₂₈～R ₃₁, pilot lamp LED ₁～LED ₃, the pilot lamp loop of composition is connected, IC ₆Data port PO ₀～PO ₇Respectively with IC ₈Data port D ₀～D ₇Be connected IC ₈Delivery outlet Q ₀～Q ₇Respectively with IC ₉Input port A ₀～A ₇Be connected; Keyboard management and display circuit (7) are by IC ₁₀, IC ₁₂～IC ₁₅, keyboard KS, R ₃₇～R ₅₀, display screen LED ₄, LED ₅The common composition, its interconnected relationship is IC ₁₀Data port D ₀～D ₇Respectively with IC ₆Data port PO ₀～PO ₇Be connected, IC ₁₀Sweep trace SL ₀～SL ₃Respectively with IC ₁₄, IC ₁₅Input end 1A～4A and line 1R～4R of 4 * 3 word keyboard KS connection that is in parallel, IC ₁₀Line of return RL ₀～RL ₂Be connected IC with alignment 1C～3C of keyboard KS respectively ₁₀Section output line OA ₀～OA ₃And OB ₀～OB ₃Respectively with IC ₁₂And IC ₁₃Input end A～D be connected IC ₁₂And IC ₁₃A section decoding output line a～g pass through R respectively ₃₇～R ₄₃, R ₄₄～R ₅₀With four word precompression display screen LEDO ₄With the real pressure display screen of four words LED ₅Be connected IC ₁₄And IC ₁₅Position output line 1Y～4Y respectively with LED ₄And LED ₅The position input end be connected; Warning is respectively by BG with overload control circuit (8) ₃, BG ₆, IC ₁₁, R ₂₆～R ₂₇, R ₃₂～R ₃₆, C ₁₁～C ₁₂, loudspeaker SP connection in series-parallel forms alarm control circuit and by BG ₁, R ₂₁, relay R Y connection in series-parallel forms the overload control circuit.Wherein, BG ₃Pass through R ₂₆With IC ₆Delivery outlet P1 ₃Be connected, and and IC ₁₁Input end connects, IC ₁₁Output terminal pass through BG ₆SP is connected with loudspeaker, BG ₁Pass through R ₂₁With IC ₆Delivery outlet P1 ₅Be connected, and be connected with relay R Y.The simple principle of work of circuit is: obtain pressure signal by the pressure transducer bridge circuit and deliver to from steady zero formula operational amplifier (IC ₁), the pressure after amplifying simulates signal and send into IC after low pass filter filtering ₃Transformation of variables is touched in realization, and clock-signal generator provides IC ₃The required clock signal of working.Digital signal after conversion is through peripheral interface circuit (IC ₅) deliver to cpu system and judge, by the software of its setting realize drift zero point from motion tracking handle, the heavy net pressure extraction of peeling, maximum pressure iterative processing, loading and unloading do not have switching automatic identification processing etc., then by the IC of cpu system ₆Data bus is delivered to the IC of keyboard management and display circuit ₁₀Carry out the real-time pressure display process.When not loading, press button K ₂To IC ₆Be input in the high level arteries and veins, just can be at real-time pressure display screen LED ₅On read unloaded pressure value.IC ₁₀Receiving course to keyboard data is by sweep trace SL ₀～SL ₃Send sweep signal to keyboard KS circularly, be pressed when keying in data when running into keyboard, then by line of return RL ₀～RL ₃Detect, and be transferred to cpu system by software to the set pressure of keying in differentiate, limit and mistake proofing handle, and delivers to IC then ₁₂Decipher, be delivered to LED again ₄The realization set pressure shows, button K ₁Pressed and take place to show before the reset operation and be held always.And the real-time pressure data are through IC ₁₀Deliver to IC ₁₃Decipher, deliver to real-time pressure display screen LED again ₅Show.Set pressure and real-time pressure carry out numeric ratio by cpu system by software control, when real-time pressure surpasses set pressure numerical value boundary, and IC ₆To BG ₃Send starting impulse, make IC ₁₁Produce the warning pulse signal, promote loudspeaker SP sounding reminding operator release.If the operator ignores alerting signal, continue when reading to increase pressure IC to the dangerous pressure of software set ₅To BG ₁Send stopping signal and go pilot relay RY, guarantee the safety of physical construction to cut off the banded extruder power supply.Have only the release of working as, pressure is replied when being zero, presses print button K ₃Just can come into force and by IC ₆Detect and acceptance.At this moment, from keyboard KS input lot number, (LED ₂Shinny), date (LED ₃Shinny) etc. after printed information confirms, the maximum pressure numerical value of choosing together with software iteration is via Peripheral Interface IC ₅Carry to mini-printer.If need not print, can repeat the pressure monitoring process.If when needing to change set pressure, press reset button K ₁, can re-enter set pressure numerical value.

The utility model and existing electronic pointer manometric balance are relatively, mainly contain following advantage and effect: (1) this pressure instrument replaces the mechanical indicator drive mechanism with electronics integrated circuit structure, has overcome fully that the resolution that existing electronic pointer manometric balance exists is low, function is few, shortcomings such as fragile, fearness shake, rapid wear; (2) this pressure instrument has been realized digitizing automatically monitoring and control, and set pressure and real-time pressure all show with digital split screen and replace the pointer that has manometric balance now, make simple and clear, resolution is high; (3) the unloaded pressure observation function of this pressure instrument is brought significant effectiveness to zero point adjustment and first pressing setting, only when this function correct execution or the correct approval of this operation, just can enter next step function and operation, this function and prevent the maloperation ability, guaranteed the reliable of operation step preface, avoided and reduced artificial fault; (4) software of this pressure instrument be equipped with remove drift zero point automatic tracking technique and loading and unloading do not have switch identification technology and the automatic extractive technique of net pressure, make pressure monitoring reach the advanced level of high resolving power and high stability; (5) this pressure instrument can with have rub up, the incorporate new catalyst make-up machine of multimachine of functions such as extrusion, granulation realizes that pressure monitoring is supporting; (6) the artificial parameter of this pressure instrument all adopt keyboard input, flexible, in light weight, function is many, makes the banded extruder performance step into the rank of advanced units of digitizing, intellectuality, robotization.

As follows to description of drawings below: Fig. 1 is a banded extruder intelligent pressure gauge principle of work block scheme.Fig. 2 is the panel construction synoptic diagram of banded extruder intelligent pressure gauge.Among the figure, 9 is set pressure display screen LED ₄10 is loudspeaker SP; 11 is real-time pressure display screen LED ₅12 is sensor bridge circuit trimmer potentiometer at zero point W ₁13 is the printer paper outlet of mini-printer PRINTER.14 is 4 * 3 word keyboard KS; 15,17,20 be respectively pilot lamp LED ₁, LED ₂, LED ₃16 is reset button K ₁18 is unloaded observation button K ₂19 is print button K ₃Fig. 3 is banded extruder intelligent pressure gauge circuit theory diagrams.

The inventor has finished enforcement of the present utility model by the cooperation of machine works of South China Science ﹠ Engineering University.Implementation step is as follows: 1. processed 26 * 30cm base plate with sheet metal, load onto the printed panel socket of 22 * 7 pin in the right of base plate rear positions installation transformer BT, base plate forward position, and socket is carried out line by circuit diagram shown in Figure 2, anterior position is installed mini-printer in base plate the right; 2. draw 2 circuit printing plates respectively by circuit diagram shown in Figure 2, the components and parts through screening are installed on each printed circuit board (PCB), and every bar printing plate energized simply tests, to guarantee the path of signal; 3. printed panel is inserted in respectively on each socket of base plate, energized is carried out uniting and adjustment.Pay special attention in the uniting and adjustment; By regulating W ₁Carry out the fine setting at zero point.Pass through W ₂Carry out full scale and regulate, with the influence that guarantees not regulated by the amplification quantity of amplifier own, symmetrical stabilized voltage supply V ₊And V _-To IC ₁And IC ₃Power supply is with complete machine primary power V ₁Separately, be not subjected to the interference of digital display circuit and influence to guarantee to simulate signal.Realize the various functions of this pressure instrument design by software program is set, and the described circuit working principle of by specification is carried out moral conduct and is checked the working condition of each circuit and finishing of each function; The panel that 4. 26 * 12cm of printer paper outlet is arranged with the casing of 26 * a 30 * 12cm of sheet metal processing and the right, and display screen, keyboard, pilot lamp, button etc. are installed on the panel, and be connected by Fig. 2 and circuit shown in Figure 3 with the pin of printed panel socket by shown in Figure 2.Put into the base plate that transformer BT, printed circuit board (PCB), mini-printer are housed in the casing at last and tighten up, and panel is fastened on the casing.Just finished enforcement of the present utility model.

Claims

1, a kind of banded extruder intelligent pressure gauge of forming by metal chassis, printed circuit board (PCB), mini-printer and panel, it is characterized in that its circuit by sensor modulate circuit (1), analog-digital converter circuit (2), symmetrical stabilized voltage supply (3), peripheral interface circuit (5), CPU minimum system (6), keyboard management and display circuit (7), report to the police to interconnect successively and form with the control circuit (8) that overloads.

2, by the described banded extruder intelligent pressure gauge of claim 1, it is characterized in that described sensor modulate circuit (1) is by integration member IC ₁, resistance R ₁～R ₁₄, potentiometer W ₁～W ₂, capacitor C ₁～C ₃The common composition, wherein, R ₁～R ₁₄Decomposition pressure strain transducer bridge circuit, its output terminal inserts by R ₅～R ₇, W ₁R is passed through at the resistive networking of forming of zeroing again ₈And R ₉With by R ₁₀～R ₁₄, C ₁～C ₂, W ₂The IC that forms from steady zero formula operational amplifier ₁Positive and negative input end be connected IC ₁Positive and negative power end through R ₁₂And R ₁₃Respectively with by transformer BT, diode d ₂～d ₇, electrochemical capacitor C ₁₃～C ₁₇, the positive and negative symmetrical stabilized voltage supply (3) formed of three terminal integrated voltage stabilizer 7805,7905 parallel-seriess output terminal V ₊And V _-Be connected IC ₁Output terminal via R ₁₄, W ₂The full scale trim network of forming reaches by C ₃, R ₁₇, C ₇The low-pass filter of forming with touch the IC of transformation of variables circuit (2) ₃Signal input part IN be connected.

3, by the described banded extruder intelligent pressure gauge of claim 1, it is characterized in that the described transformation of variables circuit (2) of touching is by IC ₂～IC ₄, R ₁₅～R ₁₉, C ₄～C ₇, C ₁₉The common composition, wherein, IC ₂, R ₁₅, W ₃Voltage-reference is formed in parallel-series, and it is exported through W ₃With IC ₃V _REnd is connected, IC ₃Clock signal input terminal CLR with by R ₁₈～R ₁₉, C ₁₉, IC ₄The IC of the clock-signal generator that connection in series-parallel is formed ₄Output terminal be connected IC ₃Digital signal output end B ₁～B ₈, D ₁～D ₄Respectively with peripheral interface circuit IC ₅Input port PA ₀～PA ₇Be connected IC ₅Output PB ₀～PB ₇Respectively with the data input port D of mini-printer PRINTER ₀～D ₇Be connected IC ₅Reset terminal RST with by K ₁, R ₂₀, C ₈The reset circuit that composes in parallel is connected, IC ₅Data output D ₀～D ₇Respectively with by IC ₆, IC ₈, IC ₉The IC of the CPU minimum system that parallel-series is formed ₆Data port PO ₀～PO ₇Be connected IC ₆Delivery outlet P1 ₄, P1 ₂, P1 ₁Respectively with BG ₂, BG ₄, BG ₅, R ₂₄, R ₂₅, R ₂₈～R ₃₁, pilot lamp LED ₁～LED ₃The pilot lamp loop of forming is connected IC ₆Data port PO ₀～PO ₇Respectively with IC ₈Data port D ₀～D ₇, IC ₉Data port D ₀～D ₇Be connected IC ₈Delivery outlet Q ₀～Q ₇Respectively with IC ₉Input port A ₀～A ₇Be connected.

4,, it is characterized in that described keyboard management and display circuit (7) are by IC by the described banded extruder intelligent pressure gauge of claim 1 ₁₀, IC ₁₂～IC ₁₅, keyboard KS, R ₃₇～R ₅₀, display screen LED ₄, LED ₅The common composition, its interconnected relationship is: IC ₁₀Data port D ₀～D ₇Respectively with IC ₆Data port PO ₀～PO ₇Be connected IC ₁₀Sweep trace SL ₀～SL ₃Respectively with IC ₁₄, IC ₁₅Input end 1A～4A and line 1R～4R of 4 * 3 word keyboard KS connection that is in parallel, IC ₁₀Line of return RL ₀～RL ₂Be connected IC with alignment 1C～3C of keyboard KS respectively ₁₀Section output line OA ₀～OA ₃And OB ₀～OB ₃Respectively with IC ₁₂And IC ₁₃Input end A～D be connected IC ₁₂And IC ₁₃Decoding output line a～g pass through R respectively ₃₇～R ₄₃, R ₄₄～R ₅₀, with four word precompression display screen LED ₄With four word real-time pressure display screen LED ₅Be connected IC ₁₄And IC ₁₅Position output line 1Y～4Y respectively with LED ₄, LED ₅The position input end be connected.

5,, it is characterized in that described warning and overload control circuit (8) are respectively by BG by the described banded extruder intelligent pressure gauge of claim 1 ₃, BG ₆, IC ₁₁, R ₂₆～R ₂₇, R ₃₂～R ₃₆, C ₁₁～C ₁₂, loudspeaker SP connection in series-parallel forms alarm control circuit and by BG ₁, d ₁, R ₂₁, relay R Y connection in series-parallel forms the overload control circuit, wherein, BG ₃Pass through R ₂₆With IC ₆Delivery outlet P1 ₃Be connected, and and IC ₁₁Input end connects, IC ₁₁Output terminal pass through BG ₆SP is connected with loudspeaker, BG ₁Pass through R ₂₁With IC ₆Delivery outlet P1 ₅Be connected, and be connected with relay R Y.