CN2725893Y - Micro-moisture tester - Google Patents
Micro-moisture tester Download PDFInfo
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- CN2725893Y CN2725893Y CN 200420053196 CN200420053196U CN2725893Y CN 2725893 Y CN2725893 Y CN 2725893Y CN 200420053196 CN200420053196 CN 200420053196 CN 200420053196 U CN200420053196 U CN 200420053196U CN 2725893 Y CN2725893 Y CN 2725893Y
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Abstract
The utility model discloses a micro-moisture tester, belonging to the measuring instrument field. The micro-moisture tester comprises an electrolytic cell, an alternative switch, a single chip computer controller and a data processor connected with the alternative switch, a keyboard operating circuit, a printing circuit and a display circuit which are connected with the single chip computer controller and the data processor. The micro-moisture tester is characterized in that the micro-moisture tester is provided with a measuring circuit, an amplifier, a precise detector, a filter and a current control circuit connected with the electrolytic cell. The measuring circuit connects with the amplifier, the precise detector, a filter and the current control circuit; one output end of the current control circuit is connected with the electrolytic cell, and the other output end is connected with the alternative switch; the other output end of the filter is connected with the alternative switch. The utility model has the advantages of high precision, convenient operations, digital display of measuring result and wide and scope of application. The micro-moisture tester is used for testing water in the substance of petroleum, chemical industry in the process of production. The micro-moisture tester is widely used for testing water in the substance such as oil-filled electric apparatus, medicine, agricultural chemicals, grain, explosive, textiles, pigment, paints, raw mineral materials, etc. in the processes of the petroleum production and the chemical production.
Description
Technical field
Micro-water analyzer belongs to field of analytic instrument.
Present moisture teller, mainly comprise condenser type, drying type, infrared-type, Ka Er-Fei Xiushi, basically be the moisture of measuring a certain material, as all being single measurement function to grain, medicinal material etc., Ka Er-Fei Xiu French can only be measured constant moisture and can not measure micro-moisture, and complex operation.Through " Chinese patent " retrieval, do not have as yet at present measure in oil, the chemical process, in oily electric equipment insulating oil, the instrument of the determination of trace water of the mensuration of moisture in the mensuration of profit saturation degree and the gas.
The utility model content
The technical problems to be solved in the utility model is: provide a kind of precision height, simple to operate, measurement result measuring process to show, can measure micro-moisture by LCD large color screen display, can be widely used in oil, the chemical process, in oily electric equipment insulating oil, micro-water analyzer such as profit saturation degree mensuration.
The technical scheme that its technical matters that solves the utility model adopts is: this micro-water analyzer, comprise: electrolytic cell, either-or switch, Single-chip Controlling that links to each other with either-or switch and data processing, the keyboard operation that links to each other with Single-chip Controlling and data processing, print, and display circuit, it is characterized in that: the metering circuit that links to each other with electrolytic cell is set, amplifier, accurate detection, wave filter, current control circuit, metering circuit and amplifier, accurate detection, wave filter, current control circuit links to each other, current control circuit is exported an end and is linked to each other with electrolytic cell, another termination either-or switch, the wave filter output other end with connect either-or switch and link to each other.Micro-water analyzer of the present utility model is the instrument of the mensuration moisture of coulometry and the effective combination of Ka Er-Fei Xiufa.
The main effect of the metering circuit of micro-water analyzer of the present utility model is by the electric quantity change composite signal in the sine wave of sine-wave oscillation generator generation and the potential electrode measurement electrolytic cell.
The main effect of amplifier is that synthetic signal is amplified.
The main effect of accurate detection is that the signal of electric quantity change detects in the electrolytic cell with following in the composite signal after amplifying.
The main effect of wave filter is to make signal become the level and smooth signal that electric quantity change changes of following by filtering.
The main effect of current control circuit is control Faradaic current and the blank electric current of compensation.
The main effect of Single-chip Controlling and data processing is that the simulating signal of input is carried out the A/D conversion, handled, with the data comparison of storage inside, carry out computing, in addition according to other parts of signal controlling of keyboard input, realize that the result shows, prints and storage.
The main effect of either-or switch is the control by clock signal, selects the input of connection signal, also can select four to select one or other A/D switches.
Compared with prior art, the beneficial effect that the utility model had is: overcome the function that prior art can only realize single mensuration, Ka Er-Fei Xiufa can only measure constant moisture can not measure micro-moisture, loaded down with trivial details shortcoming in the operation, adopted big Faradaic current and electric current to control automatically, measurement result shows by LCD large color screen display, have the analytic process time short, simple to operate, precision is high, high-level efficiency, advantage such as full-automatic.Can be widely used in determination of trace water in liquid, gas, the solid.Be specially adapted in oil, the chemical process, measure towards mensuration, the profit saturation degree of oily electric equipment insulation water content in oil.
Description of drawings
Fig. 1 is the utility model micro-water analyzer circuit block diagram;
Fig. 2 is the utility model micro-water analyzer testing circuit schematic diagram;
Fig. 3 is the utility model micro-water analyzer Single-chip Controlling and data processing circuit schematic diagram;
Fig. 4 is the utility model micro-water analyzer warning circuit schematic diagram;
Fig. 5 is that the utility model micro-water analyzer starts the indicating circuit schematic diagram;
Fig. 6 is the utility model micro-water analyzer terminal point indicating circuit schematic diagram;
Fig. 7 is that the utility model micro-water analyzer stirs circuit theory diagrams.
Fig. 1-the 7th, the most preferred embodiment of the utility model micro-water analyzer, wherein: D1 single-chip microcomputer D2 latch D3, D11 reverser D4, D5 programmable parallel interface chip D6 code translator D7 analog to digital converter D8 two four selects a switch D9 clock controller D10 watchdog chip D12, D13 storage unit S1 two-way switch G1～G3 crystal oscillator G4 battery N1-N11, N13 integrated operational amplifier N12 voltage to frequency converter B1 hummer M1 motor, R1～R67 resistance R W1-RW10 potentiometer C1～C67 electric capacity X1, X2 interface K1～K3 relay V1～V4, V7～V9, V13, V15, V16, V19, V21 diode V5, V6 voltage stabilizing diode V10, V12, V14, V17, V18, V20, V22, V27, V28, V29, V30, V31 triode V11 rectifier bridge LED1～LED4 light emitting diode T1, the T2 transformer
Embodiment
Below in conjunction with accompanying drawing micro-water analyzer of the present utility model is described further: shown in Fig. 1-7: assemble the micro-water analyzer of a playscript with stage directions utility model, circuit structure and function are as follows:
Shown in Figure 7: the mixing part:
Be made up of magnetic stirring apparatus and circuit, the PA4 pin of programmable parallel interface chip D4 8255 drives relay K 2 through the acting in opposition of reverser D3:E through resistance R 55 driving triode V18, V28.Contact K2-1 and contact K2-2 are closed simultaneously when relay K 2 work.
Relay K 2 contact K2-1 closures ,+12V voltage is luminous through resistance R 54 driven for emitting lights diode (LED)s 1, and circuit working is stirred in indication.Relay K 2 contact K2-2 closures are added in+12V voltage on the c utmost point and potentiometer RW7 of triode V17, make motor M 1 drive circuit works.Be connected to capacitor C 25 between the b utmost point of triode V17 and the ground, be connected to diode D2 between the e utmost point of triode V17 and the ground.Potentiometer RW7 three ends are connecting resistance R51-R53 respectively, is connected on the c utmost point, the b utmost point and the ground of triode V17 then.
Shown in Figure 4: warning circuit:
Alerting signal makes hummer B1 work through the reverse of reverser D3:B through resistance R 48 driving triode V14, V27 by the PA1 pin of programmable parallel interface chip D4 8255.The e utmost point ground connection of triode V14 is connected to capacitor C 27 between the b utmost point and the e utmost point.The b utmost point of triode V27 connects the c utmost point of triode V14.The c utmost point ground connection of triode V27, hummer B1 one termination+5V voltage, the e utmost point of a termination triode V27.
Shown in Figure 5: as to start indicating circuit:
The electrolysis indicator signal makes that through the driving triode V30 conducting of reverser D3F LED 2 is luminous.
13 pin of reverser D3F connect enabling signal, and 12 pin connect the b utmost point of triode V30 by resistance R 64.The e utmost point ground connection of triode V30 is connected to capacitor C 58 between the e utmost point and the b utmost point.The c utmost point of triode V30 connects+5V by resistance R 65, LED 2.
Shown in Figure 6: the terminal point indicating circuit:
Electrolysis finishes the driving triode V31 conducting of indicator signal through reverser D3C, makes that LED 3 is luminous.
The 5 pin access node bundle signals of reverser D3C, 6 pin connect the b utmost point of triode V10 by resistance R 66.The e utmost point ground connection of triode V31 is connected to capacitor C 59 between the e utmost point and the b utmost point.The c utmost point of triode V31 connects+5V by LED 3, resistance R 67.
Keyboard circuit:
4 * 5 keyboard circuits.Be connected to button S01～S04 between 2 pin and 9,7,5 of interface X1-2,3 pin, be connected to button S05～S08 between 4 pin and 9,7,5,3 pin, be connected to button S09～S12 between 6 pin and 9,7,5,3 pin, be connected to button S13～S16 between 8 pin and 9,7,5,3 pin, be connected to button S17～S20 between 10 pin and 9,7,5,3 pin.3,5,7,9 pin of interface X1-2 also are connected on the resistor R X1.1 pin of resistor R X1 connects+5V.
Serial ports display and printer
The DATA pin of serial ports display connects the TXD pin of single-chip microcomputer D1, and the BUSY pin connects the RXD pin of single-chip microcomputer D1.5 pin ground connection of serial ports display, 3 pin connect+5V.
Each pin of printer WDUP-A24DP is connected on the interface X2-2 with this.
Shown in Figure 3: testing circuit
Sine-wave oscillator
Produce the sine wave of 28Hz, be added on the potential electrode by resistance R 8 then, with the current potential that how much the causes variation just of measuring moisture in the electrolytic cell, the signal input amplifier that measures.Its connected mode is:
2 pin of integrated operational amplifier N1 are connected to the input end grounding of capacitor C 2,6 pin by transformer T1 by resistance R 1 ground connection between 2 pin and 6 pin, output one end of transformer T1 connects potential electrode 1 by resistance R 8, another termination potential electrode 2.Connect the input of transformer T2 between the potential electrode 1,2.3 pin of integrated operational amplifier N1 are by capacitor C 1 ground connection.
Be connected to resistance R 3 between 2 pin of integrated operational amplifier N2 and 6 pin of integrated operational amplifier N1, be connected to capacitor C 3, diode V2, resistance R 4 and diode V1, resistance R 5 between 2 pin and 6 pin, be connected to resistance R 7 between the positive pole of diode V2 and 4 pin, be connected to resistance R 6 between the negative pole of diode V1 and 7 pin, 3 pin ground connection are connected to resistance R 2 between 6 pin of integrated operational amplifier N2 and 3 pin of integrated operational amplifier N1.
Signal amplifier
Adopt the homophase operational amplifier, faint measuring-signal (variable quantity of measuring-signal) is amplified, for the wave detector of back provides enough signal voltages.The device connected mode:
2 pin of integrated operational amplifier N3 connect the output terminal of transformer T2, as the input of signal amplification.Be connected between 2 pin and the ground between resistance R 9,2 pin and 6 pin and be connected to resistance R 10.
Wave detector
Wave detector adopts absolute value (full-wave rectification) circuit, adds the upper level adder operational amplifier on the basis of accurate half-wave rectifier, and function responds near ideal diode.The device connected mode:
3 pin of integrated operational amplifier N4 are by resistance R 13 ground connection, and 2 pin are connected on by resistance R 12, capacitor C 4 on 6 pin of integrated operational amplifier N3, input signal.The negative pole of polar capacitor C4 is by resistance R 11 ground connection, be connected on by resistance R 16 on 2 pin of integrated operational amplifier N5, be connected to diode V4 and resistance R 14 and diode V3 between 2 pin and 6 pin, 2 pin also are connected on the resistance R 15 by resistance R 14, and then are connected on 2 pin of integrated operational amplifier N5.
3 pin of integrated operational amplifier N5 are by resistance R 17 ground connection.Be connected to potentiometer RW2 and resistance R 19 between 2 pin and 6 pin.2 pin by resistance R 18, potentiometer RW1, resistance R 21 be connected on+the 15V power supply on.6 pin of integrated operational amplifier N5 connect the wave filter input by resistance R 20 and resistance R 22.Can set equilibrium point by potentiometer RW1.Can regulate the enlargement factor of integrated operational amplifier N5 by potentiometer RW2.
Wave filter
The signal of detecting circuit output will pass through filter filtering, makes it to become one level and smooth, and follows the DC voltage of input signal variation.The device connected mode:
Be connected to resistance R 20 and resistance R 22 between 3 pin of integrated operational amplifier N6 and 6 pin of N5.3 pin of integrated operational amplifier N6 are by capacitor C 6 ground connection.Be connected to resistance R 22, capacitor C 5 between 3 pin and 6 pin.2 pin are by resistance R 23 ground connection.2 pin link to each other with 6 pin.6 pin are by resistance R 24 and voltage stabilizing diode V5 ground connection.
The negative pole of voltage stabilizing diode V5 connects the four X1 pin that select a switch by resistance R 25 and potentiometer RW8, and output changes measuring-signal intuitively.Four select a switch also can adopt either-or switch or other A/D switches.
Be connected to resistance R 33 and diode V8 between output terminal 6 pin of integrated operational amplifier N8 and the b utmost point of triode V10.Be connected to diode V7 between 6 pin of 3 pin and integrated operational amplifier N7.3 pin are connected on 6 pin of integrated operational amplifier N6 by resistance R 28.2 pin are connected in resistance R 32, ground connection then by potentiometer RW3.2 pin also are connected in 3 pin of integrated operational amplifier N13.2 pin of integrated operational amplifier N13 link to each other with 6 pin.Be connected to potentiometer RW9 between 6 pin of integrated operational amplifier N13 and the ground.The sliding contact of potentiometer RW9 inserts the X0 pin of either-or switch.
3 pin of integrated operational amplifier N7 are by resistance R 27 ground connection, and 3 pin also and between 6 pin of integrated operational amplifier N6 are connected to resistance R 26.2 pin are by resistance R 29 ground connection.Be connected to capacitor C 7 and voltage stabilizing diode V6 between 2 pin and 6 pin.
Blank current compensation circuit:
Current compensation signal drives relay K 1 through reverser D3D and resistance R 46 driving triode V12, V29.Reverse swing door D3D extremely links to each other with the b of triode V12 by resistance R 46.The e utmost point ground connection of triode V12 is connected to capacitor C 22 between the b utmost point and the e utmost point.Relay K 1 two ends are connected to diode V13.Be connected to resistance R 47 between relay K 1 and the operating voltage+12V.
Closed 6 pin and 2 pin of connecting integrated operational amplifier N7 of the contact K1-2 of relay K 1.Be connected to resistance R 30, voltage stabilizing diode V6 and capacitor C 7 between 6 pin and 2 pin.
Closed 3 pin of integrated operational amplifier N10 and 6 pin of integrated operational amplifier N9 connected of the contact K1-1 of relay K 1.6 pin of integrated operational amplifier N9 are connected on the end of the contact K1-1 of relay K 1 by resistance R 36, and the other end of the contact K1-1 of relay K 1 is connected on 3 pin of integrated operational amplifier N10.
3 pin of integrated operational amplifier N9 link to each other with resistance R 32, by resistance R 32 ground connection.2 pin are by R34 ground connection.Between 2 pin and 6 pin resistance R 35 is arranged.6 pin are by R36, capacitor C 11 ground connection.
Be connected to capacitor C 12 between 3 pin of integrated operational amplifier N10 and the ground.2 pin link to each other with 6 pin.
Be connected to resistance R 37 between 2 pin of integrated operational amplifier N11 and the integrated operational amplifier N10.Be connected to resistance R 38 between 2 pin and 6 pin.3 pin link to each other with 3 pin of integrated operational amplifier N9.
Be connected to resistance R 39 and potentiometer RW4 between 1 pin of voltage to frequency converter N12 and the integrated operational amplifier N11.1 pin of voltage to frequency converter N12 is connected to the sliding end of potentiometer RW5 by resistance R 40, potentiometer RW5 two ends connect respectively-15V and+the 15V power supply.12 pin of voltage to frequency converter N12 connect+the 15V end, and by capacitor C 15 ground connection.10 pin of voltage to frequency converter N12,13 pin link to each other then and are connected to capacitor C 14 between 1 pin.4 pin of voltage to frequency converter N12 connect-15V.11 pin of voltage to frequency converter N12, the continuous ground connection of 14 pin.Be connected to capacitor C 16 between 4 pin of voltage to frequency converter N12 and 11 pin, 14 pin.5 pin of voltage to frequency converter N12 are by capacitor C 13 ground connection.7 pin of voltage to frequency converter N12 connect+5V by resistance R 41.7 pin of voltage to frequency converter N12 are connected on the T0 mouth of single-chip microcomputer D1 as data output.
The Faradaic current on-off circuit:
The PA3 pin of programmable parallel interface chip D4 8255 drives triode V20, V22 through resistance R 57 and drives relay K 3.The e utmost point ground connection of triode V20 is connected to capacitor C 23 between the b utmost point and the e utmost point.Relay K 3 two ends are connected to diode V21.Be connected to resistance R 58 between relay K 3 and the operating voltage+12V.
The closed LED 2 of relay contact K3-2 is luminous.Be connected to resistance R 61 between LED 4 and the contact.
The closed e utmost point and resistance R 31 ground connection of connecting triode V10 of relay K 3 contact K3-1.Be connected to the normal phase input end of integrated operational amplifier N13 in addition.Be connected to capacitor C 8 between the b utmost point of triode V10 and the c utmost point.Be connected to capacitor C 9, C10 between the c utmost point of triode V10 and the negative pole of rectifier bridge V11.Rectifier bridge V11 negative pole and electrolysis electrode-between be connected to diode V9.Electrolysis electrode+ground connection.
Shown in Figure 2: Single-chip Controlling and data processing circuit:
The P0 mouth of single-chip microcomputer D1 is the input and output bidirectional interface.
Each pin of P0 mouth connects D0～D7 pin of latch D2 respectively earlier, connects D0～D7 pin of storage unit D12 again, and then connects D0～D7 pin of two of D0～D7 pin of storage unit D13 and programmable parallel interface chip D4, D5.Use as address bus.
Each pin of P0 mouth also is connected to B1～B8 pin of analog to digital converter D7, and wherein B1～B6 of analog to digital converter D7 also is connected to B9～B12 and OR, each pin of POL respectively.Realize data input single-chip microcomputer.
P20～the P25 of P2 mouth is connected in Q0～Q7 pin of latch D2 earlier, links to each other with A0～A13 pin of storage unit D12 again, also is connected in A0～A10 pin of storage unit D13 simultaneously.Realize the storage of memory data and read.
Wherein, the A0 of storage unit D12, A1 pin are connected in A0, the A1 pin of programmable parallel interface chip D5.The A0 of storage unit D13, A1 pin are connected in A0, the A1 pin of programmable parallel interface chip D4.Select signal as port.
P26, P27 are connected to A, the B pin of code translator D6A.Through four tunnel outputs of code translator D6AY0-Y3 pin.Wherein, the Y0 pin is connected in the CEIN pin of watchdog chip D10; The Y1 pin is connected in the CS pin of programmable parallel interface chip D4; The Y2 pin is connected in the CE pin of analog to digital converter D7; The Y3 pin is connected in the CS pin of programmable parallel interface chip D5.Send chip selection signal respectively.Wherein the P26 pin also is connected in the PGM pin of storage unit D12.Programming control signal is provided.
The P10 of P1 mouth～P13 pin is connected in D0～D3 pin of clock control chip D9.A0～A3, the READ of clock control chip D9, WRITE, HOLD are connected to PC0～PC6 pin of programmable parallel interface chip D5 respectively.Programme as time showing.
The P15 pin is connected to the WDI mouth of watchdog chip D10.
The P17 pin meets two-way switch S1.S1-1 connects+5V, S1-2 ground connection.
The INT1 pin is connected in the PFO pin of watchdog chip D10.Outer interrupt source is provided.
The INT0 pin is connected in the STA pin of analog to digital converter D7.Outer interrupt source is provided.
The T0 pin is connected in 7 pin of voltage to frequency converter N12.The frequency that the input Faradaic current converts to.
EA/VP pin connection+5V.
The RESET pin is connected to the RESET pin of programmable parallel interface chip D4, D5 and watchdog chip D10.Be connected to reverser D11A-D11D between the RESET pin of single-chip microcomputer D1 and the RESET pin of watchdog chip D10.The 2 pin connecting resistance R60 of reverser D11A-D11D connect+5V then, and 3 pin, 8 pin connecting resistance R59 are ground connection then.
The TXD pin is connected in the DATA pin of serial ports display.Carry shows signal to display.
The RXD pin is connected in the BUSY pin of serial ports display.Acceptance is from the busy indication of display.
X1, X2 pin meet crystal oscillator G1 earlier, meet capacitor C 29, C30 then respectively, last ground connection.D1 provides frequency of operation for single-chip microcomputer.
The WR pin is connected with the W pin of storage unit D13, the WR pin of programmable parallel interface chip D4, the WR pin of programmable parallel interface chip D5 simultaneously.
The RD pin is connected with the G pin of storage unit D13, the RD pin of programmable parallel interface chip D4, the RD pin of programmable parallel interface chip D5 simultaneously.
PA0～PA7 of programmable parallel interface chip D5, PB0～PB2 pin connects printer.
PB0～PB4 of programmable parallel interface chip D4, PC0～PC3 pin connects 4 * 5 keyboards.PA0 output current compensating signal, the PA1 output alarm signal, PA2 exports endpoint signal, PA3 output electrolysis signal, signal is stirred in PA4 output, and PA5 exports enabling signal.
The wiring of watchdog chip D10MAX693
VBATT connects the positive pole of power supply G4, and oppositely connects+the 5V power supply through diode V15 and resistance R 62.
CEOUT is connected in the E pin of D13, after power supply disconnects, is provided the storage power of storage unit D13 by battery G4.
Be connected to capacitor C 34 between VCC and the GND.
Be connected to potentiometer RW10 between PFI and the GND, and be connected to resistance R 63 between the VCC.
VOUT is connected in the VCC pin of storage unit D13.Also be connected in VDD and the CS end of clock control chip D9.Also by capacitor C 57 ground connection.
All the other are stated above the pin.
The wiring of clock control chip D9M5832
Two XT meet crystal oscillator G3 and connect capacitor C 56 and variable capacitance C28 ground connection then then respectively.
A0～A3, READ, WRITE, HOLD pin are connected to PC0～PC6 pin of programmable parallel interface chip D5.
TEST, ADJ, GND ground connection.
PA0～PA7 and the PB0～PB2 of programmable parallel interface chip D5 are connected to printer interface X6.
The wiring of analog to digital converter D7
GND, MODE, OSCSEL be ground connection together.Be chosen to be the direct way of output.Be chosen to be crystal oscillating circuit.
V+, RUN, TEST connect+5V together.Selected positive voltage.Selected A/D inversion frequency.The test normal running.
The V-pin connects-5V.
LBEN, HBEN pin are connected to PC4, the PC5 pin of programmable parallel interface chip D4 respectively.Selected high low byte.
OSCIN, OSCOUT pin are connected to the two ends of crystal oscillator G2.The frequency of operation of converter is provided.
RECAP-, RECAP+ pin are connected to the two ends of capacitor C 17 respectively.
REFOUT, REFIN-pin link to each other, and are connected to potentiometer RW6 by resistance R 42 and are connected in resistance R 43, ground connection then.
The REFIN+ pin is connected in the mobile terminal of potentiometer RW6.
COMMON, INLO link to each other, ground connection.
The INHI pin is connected to two four by resistance R 44 and selects the X of a switch D8 to hold, as the input of analog quantity.Be connected to capacitor C 18 between INHI and the COMMON pin.
BUF pin connecting resistance R45, the AZ pin connects capacitor C 21, and INT and then is connected together respectively and meet capacitor C 19, C20 altogether.
Two four select the connection of a switch D8
Two four select a switch D8 only with one four two input ends that select a switch, realize the function of either-or switch.
INH, VEE be ground connection simultaneously.
The X0 pin connects measures current potential demonstration input signal.
The X1 pin connects Faradaic current and shows input signal.
The A pin meets the PC7 with programmable parallel interface chip D4.
The B pin meets the PC6 with programmable parallel interface chip D4.
As shown in Figure 2: the main devices of testing circuit is integrated operational amplifier N1-N11 and N13.
The main pin function that this integrated circuit is used in the design is:
2 pin inverting inputs
3 pin in-phase input ends
4 pin are born the 15V power supply
6 pin output terminals
The positive 15V power supply of 7 pin
The principle of work and the course of work are as follows:
1, after the energized, serial ports display KF-C55A shows start face face:
Stirring motor M1 below keyboard operation unlatching electrolytic cell, stir indication simultaneously, signal is stirred in programmable parallel interface chip D4 output, drives relay K 2 actions, connect motor M 1 and LED 1, can regulate stirring rate by potentiometer RW7.
2, the function generator of being made up of operational amplifier N1, N2 and peripheral cell thereof produces the sine-wave oscillation signal of standard, the amplifying circuit of being made up of operational amplifier N3 and peripheral cell thereof is imported in faint variation between potential electrode, signal is amplified, for the detecting circuit of being made up of operational amplifier N4 and peripheral cell thereof provides enough signal voltages.
Measuring-signal after the amplification is input to detecting circuit, through the detection rectification, signal is become follow the DC voltage that measuring-signal changes.And the intensity by potentiometer RW2 conditioning signal, make it to satisfy the needs of back circuit.
The output signal of detecting circuit is passed through the filtering of the wave filter of being made up of operational amplifier N6 and peripheral cell thereof, becomes a kind of DC voltage that changes smoothly and follow the input signal variation.This driven voltage-controlled current source electric current that produces electrolysis, the variation of Faradaic current produces the simulating signal that changes with thereupon on resistance R 31, send into voltage to frequency converter, with the digital signal that analog signal conversion can be discerned for single-chip microcomputer D1, input single-chip microcomputer D1 is for further processing.
3, blank current compensation: drive relay K 1 action by current compensation signal, make blank electric current when K1-1 is closed, blank electric current is forwarded on 3 pin of integrated operational amplifier N10 on the electric capacity C12, with this as benchmark, through follower N10, follow and be input to voltage to frequency converter N12, voltage signal is converted to the frequency signal that single-chip microcomputer D1 can discern, T0 input by single-chip microcomputer D1 is for further processing.
4, the electrolysis signal controlling sent by programmable parallel interface chip D4 of Faradaic current circuit, electrolysis begin and finish all have programmable parallel interface chip D4 to send control signal and drive indicating circuit.
Faradaic current process voltage-controlled current source, and after the amplitude limiter circuit processing, behind the form input a/d converter D7 with voltage, import single-chip microcomputer D1 again and be for further processing.
5, various signals draw operation result in computing and comparison through single-chip microcomputer D1, show on screen by display.If desired can also the printout measurement result.
Claims (10)
1, micro-water analyzer, comprise: electrolytic cell, either-or switch, Single-chip Controlling that links to each other with either-or switch and data processing, the keyboard operation that links to each other with Single-chip Controlling and data processing, print, and display circuit, it is characterized in that: the metering circuit that links to each other with electrolytic cell is set, amplifier, accurate detection, wave filter, current control circuit, metering circuit and amplifier, accurate detection, wave filter, current control circuit links to each other, current control circuit is exported an end and is linked to each other with electrolytic cell, another termination either-or switch, wave filter are exported another termination either-or switch.
2, micro-water analyzer according to claim 1, it is characterized in that: described metering circuit comprises: potential electrode 1, potential electrode 2, function generator, transformer T1, T2, resistance R 8,6 pin of the input termination integrated operational amplifier N1 of transformer T1 and ground, output one end of transformer T1 connects potential electrode 1 by resistance R 8, and another termination potential electrode 2 has the input end of transformer T2 between the potential electrode 1,2.
3, micro-water analyzer according to claim 2, it is characterized in that: described function generator is that sine-wave oscillator comprises: integrated operational amplifier N1, N2, diode V1, V2, resistance R 1-R7, capacitor C 1-C3,2 pin of integrated operational amplifier N1 are by resistance R 1 ground connection, be connected to capacitor C 2 between 2 pin and 6 pin, 6 pin are by the input end grounding of transformer T1,3 pin of integrated operational amplifier N1 are by capacitor C 1 ground connection, be connected to resistance R 3 between 2 pin of integrated operational amplifier N2 and 6 pin of integrated operational amplifier N1, be connected to capacitor C 3 between 2 pin and 6 pin, diode V2, resistance R 4 and diode V1, resistance R 5, be connected to resistance R 7 between the positive pole of diode V2 and 4 pin, be connected to resistance R 6 between the negative pole of diode V1 and 7 pin, 3 pin ground connection are connected to resistance R 2 between 6 pin of integrated operational amplifier N2 and 3 pin of integrated operational amplifier N1.
4, micro-water analyzer according to claim 1 is characterized in that: described amplifier comprises: 3 pin of integrated operational amplifier N3 connect the output terminal of transformer T2, are connected between 2 pin and the ground between resistance R 9,2 pin and 6 pin and are connected to resistance R 10.
5, micro-water analyzer according to claim 1 is characterized in that: described accurate detection comprises: half-wave rectifier and one-level adder operational amplifier.
6, micro-water analyzer according to claim 5, it is characterized in that: described accurate detecting circuit: 3 pin of integrated operational amplifier N4 are by resistance R 13 ground connection, 2 pin are by resistance R 12, capacitor C 4 is connected on 6 pin of integrated operational amplifier N3, the negative pole of capacitor C 4 is by resistance R 11 ground connection, be connected on by resistance R 16 on 2 pin of integrated operational amplifier N5, be connected to diode V4 and resistance R 14 and diode V3 between 2 pin and 6 pin, 2 pin also are connected on the resistance R 15 by resistance R 14, and then be connected on 2 pin of integrated operational amplifier N5,3 pin of integrated operational amplifier N5 are by resistance R 17 ground connection, be connected to potentiometer RW2 and resistance R 19 between 2 pin and 6 pin, 2 pin are by resistance R 18, potentiometer RW1, resistance R 21 is connected on+the 15V power supply on, 6 pin of integrated operational amplifier N5 connect the wave filter input by resistance R 20 and resistance R 22.
7, micro-water analyzer according to claim 1, it is characterized in that: described wave filter comprises: 3 pin of integrated operational amplifier N6 are by capacitor C 6 ground connection, be connected to resistance R 22, capacitor C 5 between 3 pin and 6 pin, 2 pin are by resistance R 23 ground connection, 2 pin link to each other with 6 pin, 6 pin are by resistance R 24 and voltage stabilizing diode V5 ground connection, and the negative pole of voltage stabilizing diode V5 connects the X1 pin of either-or switch by resistance R 25 and potentiometer RW8.
8, micro-water analyzer according to claim 1 is characterized in that: described Faradaic current control comprises: electrolytic circuit, amplitude limiter circuit, voltage controlled current source circuit, electrolysis electrode.
9, micro-water analyzer according to claim 8, it is characterized in that: be connected to resistance R 33 and diode V8 between output terminal 6 pin of the integrated operational amplifier N8 of described voltage controlled current source circuit and the b utmost point of triode V10, be connected to diode V7 between 6 pin of 3 pin and integrated operational amplifier N7,3 pin are connected on 6 pin of integrated operational amplifier N6 by resistance R 28,2 pin are by potentiometer RW3, resistance R 32 ground connection, 2 pin of integrated operational amplifier N8 also link to each other with 3 pin of integrated operational amplifier N13,2 pin of integrated operational amplifier N13 link to each other with 6 pin, be connected to potentiometer RW9 between 6 pin of integrated operational amplifier N13 and the ground, the sliding contact of potentiometer RW9 inserts the X0 pin of either-or switch, 3 pin of the integrated operational amplifier N7 of amplitude limiter circuit are by resistance R 27 ground connection, be connected to resistance R 26 between 6 pin of 3 pin and integrated operational amplifier N6,2 pin are by resistance R 29 ground connection, be connected to capacitor C 7 and voltage stabilizing diode V6 between 2 pin and 6 pin, the reverse swing door D3A of electrolytic circuit is through resistance R 57 and triode V20, V22, relay K 3 links to each other, the e utmost point ground connection of triode V20, be connected to capacitor C 23 between the b utmost point and the e utmost point, relay K 3 two ends are connected to diode V21, be connected to resistance R 58 between relay K 3 and the operating voltage+12V, be connected to resistance R 61 between relay K 3 contacts and the LED 4, the e utmost point of relay K 3 contacts and triode V10 is by resistance R 31 ground connection, be connected to 3 pin of integrated operational amplifier N13 in addition, be connected to capacitor C 8 between the b utmost point of triode V10 and the c utmost point, be connected to capacitor C 9 between the c utmost point of triode V10 and the negative pole of rectifier bridge V11, C10, rectifier bridge V11 negative pole and electrolysis electrode-between be connected to diode V9, electrolysis electrode+ground connection.
10, micro-water analyzer according to claim 1, it is characterized in that: Faradaic current control also comprises blank current compensation circuit, reverse swing door D3D extremely links to each other with the b of triode V12 by resistance R 46, the e utmost point ground connection of triode V12, be connected to capacitor C 22 between the b utmost point and the e utmost point, relay K 1 two ends are connected to diode V13, be connected to resistance R 47 between relay K 1 and the operating voltage+12V, be connected to the contact K1-2 of resistance R 30 and relay K 1 between 6 pin of integrated operational amplifier N7 and 2 pin, also be connected to voltage stabilizing diode V6 and capacitor C 7 between 6 pin and 2 pin, 6 pin of integrated operational amplifier N9 are connected on the end of the contact K1-1 of relay K 1 by resistance R 36, the other end of the contact K1-1 of relay K 1 is connected on 3 pin of integrated operational amplifier N10,3 pin of integrated operational amplifier N9 are by resistance R 32 ground connection, 2 pin are by resistance R 34 ground connection, between 2 pin and 6 pin resistance R 35 is arranged, 6 pin are by resistance R 36, capacitor C 11 ground connection, be connected to capacitor C 12 between 3 pin of integrated operational amplifier N10 and the ground, 2 pin link to each other with 6 pin, be connected to resistance R 37 between 2 pin of integrated operational amplifier N11 and 6 pin of integrated operational amplifier N10, be connected to resistance R 38 between 2 pin and 6 pin, 3 pin link to each other with 3 pin of integrated operational amplifier N9, be connected to resistance R 39 between 1 pin of voltage to frequency converter N12 and 6 pin of integrated operational amplifier N11, potentiometer RW4,1 pin of voltage to frequency converter N12 is connected to the sliding end of potentiometer RW5 by resistance R 40, potentiometer RW5 two ends connect respectively-15V and+the 15V power supply, 12 pin of voltage to frequency converter N12 connect+15V, and by capacitor C 15 ground connection, 10 pin of voltage to frequency converter N12,13 pin link to each other then and are connected to capacitor C 14 between 1 pin, 4 pin of voltage to frequency converter N12 connect-the 15V power supply, 11 pin of voltage to frequency converter N12, the 14 pin ground connection that links to each other, 4 pin of voltage to frequency converter N12 and 11 pin, be connected to capacitor C 16 between 14 pin, 5 pin of voltage to frequency converter N12 are by capacitor C 13 ground connection, 7 pin of voltage to frequency converter N12 connect+the 5V power supply by resistance R 41, and 7 pin of voltage to frequency converter N12 are connected on the T0 mouth of single-chip microcomputer D1 as data output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420053196 CN2725893Y (en) | 2004-08-28 | 2004-08-28 | Micro-moisture tester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420053196 CN2725893Y (en) | 2004-08-28 | 2004-08-28 | Micro-moisture tester |
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| CN2725893Y true CN2725893Y (en) | 2005-09-14 |
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| CN 200420053196 Expired - Fee Related CN2725893Y (en) | 2004-08-28 | 2004-08-28 | Micro-moisture tester |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102043010A (en) * | 2010-12-10 | 2011-05-04 | 毛骏尼 | Semi-automatic moisture meter |
| CN102128945A (en) * | 2011-03-18 | 2011-07-20 | 淄博科通电气科技有限公司 | Fully-sealed trace water determination system with automatic quantitative sample introduction |
| CN103344676A (en) * | 2013-07-26 | 2013-10-09 | 森田化工(张家港)有限公司 | Method for determining trace moisture in hydrogen fluoride |
-
2004
- 2004-08-28 CN CN 200420053196 patent/CN2725893Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102043010A (en) * | 2010-12-10 | 2011-05-04 | 毛骏尼 | Semi-automatic moisture meter |
| CN102128945A (en) * | 2011-03-18 | 2011-07-20 | 淄博科通电气科技有限公司 | Fully-sealed trace water determination system with automatic quantitative sample introduction |
| CN102128945B (en) * | 2011-03-18 | 2013-08-07 | 淄博科通电气科技有限公司 | Fully-sealed trace water determination system with automatic quantitative sample feeding |
| CN103344676A (en) * | 2013-07-26 | 2013-10-09 | 森田化工(张家港)有限公司 | Method for determining trace moisture in hydrogen fluoride |
| CN103344676B (en) * | 2013-07-26 | 2015-11-25 | 森田化工(张家港)有限公司 | A kind of assay method of Dryness of Little Water in HF part |
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