CN1034062A

CN1034062A - Control and measuring instrument for welding flux

Info

Publication number: CN1034062A
Application number: CN 87101253
Authority: CN
Inventors: 王涛
Original assignee: DONGFENG RADIO FACTORY BEIJING
Current assignee: DONGFENG RADIO FACTORY BEIJING
Priority date: 1987-12-16
Filing date: 1987-12-16
Publication date: 1989-07-19

Abstract

The present invention a kind ofly is furnished with single chip microcomputer and carries out the measurement of solder flux proportion and concentration, the instrument of specific gravity control, and the present invention is linked by float-type proportion sensor, amplifying circuit, mould/number conversion circuit, single chip microcomputer and demonstration and control circuit.It carries out error compensation and specific gravity control with the method for microprocessor software programming.Especially can measure and adjust the proportion (comprising the liquid that proportion is little) of solder flux in real time with this instrument in large-scale production process, it is mixed corresponding peripheral device and can also survey the temperature of solution, turbidity simultaneously.It is easy to operate, measurement range is wide, precision is high, is applicable to chemical industry, medical departments such as solution concentration control, electroplating solution specific gravity test, liquid component analysis.

Description

Control and measuring instrument for welding flux

The present invention a kind ofly is furnished with single chip microcomputer and carries out the measurement of solder flux proportion and concentration, the instrument of specific gravity control, belongs to the electronic measuring instrument class.

Producing now at present The proportion of measuring solder flux normally adopts the specific gravity of glass meter to measure.This measuring method, general measure narrow range, precision are low, exist the bigger collimation error.If measure with conventional secondary or three instrument, in order to guarantee high-acruracy survey, will be tight to the sensitive element material requirements, the machining precision height generally is difficult for accomplishing.

Purpose of the present invention is to avoid the above-mentioned weak point of prior art, and provide a kind of be furnished with controlled by single chip microprocessor than readjust measuring instrument.Proportion with this equipment survey solder flux has increased measurement range, has improved the precision of measuring, and has relaxed the precision to other part in sensitive element and the system; Under existing condition, make high-precision measurement become possibility.

Task of the present invention is finished by following measure.This device is by proportion sensor (1); Microprocessor (4); Amplifying circuit (2); Mould/number conversion circuit (3) and demonstration and control circuit (5) are formed.See accompanying drawing 1, its proportion sensor is by differential type displacement transducer (8); Floating drum (6); Spring (7); Slide block (9); Connector (10); Shell (11); Fixed head (12) is formed, and its connector one end connects floating drum, and the other end connects floating block, the floating block spring of ining succession, and spring suspension is on shell, and shell and differential type displacement transducer, fixed head are fixed together.See accompanying drawing 2 and accompanying drawing 3.The floating drum that immerses the proportion sensor in the liquid is along with tintometric variation, and self suffered liquid buoyancy also changes.Buoyancy F=V * P V is the volume of floating drum; P is the liquid specific gravity parameter.The spring of connection floating drum produces change in displacement with the stressed variation of floating drum.X=1/ (K) * F * X is displacement; K is the elasticity Steel degree of spring.F is the suffered power of spring.This change in displacement becomes electric signal output through the differential type displacement transducer.Ui=SX, the voltage of Ui sensor output, S is the sensitivity of displacement transducer.By this sensor-based system, just can become voltage signal to the liquid specific gravity Parameters Transformation.Ui=(Mg-VP) M is the quality of floating drum; G gravity coefficient, the variation of the output voltage of differential type displacement transducer is by connecting the change in displacement of the slide block of spring and floating drum in the cell winding.This little change in displacement has caused coil electromagnetism

Variation.Thereby output voltage U i is changed.Other object frictions because the motion of slide block is got along well, this has just improved sensitivity and the precision measured greatly.

The amplifying circuit of this device has been the function that gain is adjusted and adjust zero point, it is the output voltage signal of proportion sensor, receive the input end of this operational amplifier by cable, this voltage signal is zoomed into the voltage signal that changes in the critical field, by the CMOS analog multichannel switch that switches by microprocessor control, receive mould/number conversion circuit, mould/number conversion circuit is made up of A/D converter ic and resistance, an electric capacity, and it converts the analog voltage amount of input to 8 bit binary number amounts.

The microprocessor of this device is made up of three integrated circuit, and MCS-51 chip microprocessor, data latches, program storage are arranged.This device usefulness be single chip microcomputer, it is by the method for software programming, binary voltage signal (comprising proportion signal, temperature signal, turbidity signal) and control signal to mould/number conversion circuit conversion are gathered, in the specific gravity test sensor-based system, to machining precision, weight error, the linear error of spring Steel degree and the linear error of displacement transducer of floating drum volume size, and the error of this device total system compensates, data processing, collection and demonstration control.Microprocessor software program flow diagram such as Fig. 4.

This device has driving circuit, the warning circuit of the output control pump housing, and keyboard and the code-disc and the output demonstration charactron of input operation control arranged.

This device can increase temperature sensor; Turbidity sensor; Liquid level sensor carries out the proportion compensation of error that temperature, turbidity, liquid level cause by the method for single chip microcomputer software programming.

Fig. 1, the complete machine block scheme.

1. proportion sensor.2. amplifying circuit.3. mould/number conversion circuit.4. microprocessor.5. show and control circuit.

Fig. 2, the block scheme of proportion sensor.

6. floating drum.7. spring.8. differential type displacement transducer.

Fig. 3, the structural representation of proportion sensor.

6. floating drum.7. spring.8. differential type displacement transducer.

9. floating block.10. connector.11. shell.12. fixed head.

Fig. 4, solder flux concentration controller microprocessor software process flow diagram.

Fig. 5, solder flux concentration controller temperature, proportion graph of a relation.

Fig. 6, solder flux concentration controller constitutes synoptic diagram.

1. proportion sensor.13. temperature sensor.14. liquid level sensor.15. turbidity sensor.16. signal acquisition circuit.17. fixed system is given in operation.18. μ p microprocessing systems.19. Display and Alarm Circuit.20. output control circuit.21. solder flux.22. thinning agent.23. pump.24. flux solution groove.25. solution.26. solenoid valve.

Fig. 7 microprocessor system circuit

Fig. 8 analog to digital conversion circuit

Fig. 9 input channel circuit

Figure 10 output channel circuit

Figure 11 power circuit

Embodiment: solder flux concentration controller.

Solder flux concentration controller is by sensor, single chip microcomputer, amplifying circuit, analog to digital conversion circuit and demonstration and control circuit are formed, sensor is received the input end of amplifying circuit by cable, receive the input end of cmos analog switch again by the output terminal of this amplifying circuit, the output terminal of cmos switch is received the input end of mould/number conversion circuit, the control end of cmos switch is received on the single chip microcomputer input/output end port, the output line of mould/number conversion circuit is received on the single chip microcomputer input/output end port, and the control end of mould/number conversion circuit is received on the control port of single chip microcomputer; Input keyboard, code-disc are received the input end of latch 12 of the input/output end port of single chip microcomputer by lead, the output terminal of latch 12 is received on the input/output end port of single chip microcomputer; Output shows that charactron is connected to latch 34 output terminals of single chip microcomputer input/output end port by circuit, and latch 34 inputs are received on the single chip microcomputer input/output end port.The output pump housing and solenoid valve are received the output terminal of driving circuit by cable, the output terminal of I/O latch 5 is received the input end of driving circuit, the input end of latch 5 is received on the input/output end port, several liquid inlets of the pump housing are received respectively on the solenoid valve solution delivery outlet by plastic flexible pipe, and the liquid outlet of the pump housing is reached in the container of mixed solution by plastic flexible pipe.The liquid inlet of each solenoid valve is reached respectively in the different pure solution containers by plastic flexible pipe.

The sensor of this device has 4: proportion sensor, turbidity sensor, liquid level sensor, temperature sensor.The float-type proportion sensor of narrating above that the proportion sensor is used.Temperature sensor is to be made of platinum thermistor and overcoat, and its output terminal is received resistance transforming network by cable, and the output terminal of resistance transforming network is received the input end of amplifying circuit.Solder flux operating position by these four production scenes that sensor collects, go to drive demonstration and the And of topworks's (solenoid valve or pump) adjusting solder flux and the proportioning of thinning agent in groove through signal transformation, comparison, calculating, correction, compensation, satisfy technological requirement with the rate of specific gravity of regulating solder flux concentration, make solder flux result of use the best.In the signals collecting of total system, processing, computing, compensation, output control and showing, all be to serve as the control core with eight single chip microcomputers of MCS-51, system works flow process figure such as Fig. 4.In carrying out the control of solder flux concentration, must consider the influence of temperature to proportion.Temperature is to influence curve such as Fig. 5 of solder flux rate of specific gravity.This device is measured liquid specific gravity value and temperature value simultaneously by proportion sensor and temperature sensor.With the measured specific gravity value is variable, and the observed temperature value is a parameter, because rate of specific gravity is to become with temperature, it carries out computing, correction by single chip microcomputer, makes rate of specific gravity compensate to rate of specific gravity under the specified temp, from

And carried out the control of solder flux concentration effectively, make the result of use of solder flux best.

The following measurement range of specific gravity test instrument and floating-type picnometer and measuring accuracy are done compared.

The present invention utilizes controlled by single chip microprocessor, is implemented in the control of total digitalization on the system signal passage, has remedied the precision influence to systematic error of homemade components and parts discreteness and network structure.On single chip microcomputer, mix corresponding peripheral device, can carry out mapping analysis, realize Optimal Control data in enormous quantities.The present invention can not only measure and control proportion, the concentration of solder flux in real time, goes back proportion, the concentration of energy measurement, the little liquid of control proportion simultaneously, can survey temperature, the turbidity of solution, can carry out the constituent analysis of liquid.The electroplating solution specific gravity test.It is with easy to operate, and measurement range is wide, precision is high.Be applicable to departments such as chemical industry, medicine.

Program listing

ORG 8000H

RESET：AJMP ＃MAIN

POINT：AJMP ＃SEEVER

ORG 8060H

MAIN：MOV R1，＃20H

MOV @R1，A

MAIN3：INC R1

MOV @R1，A

CJNE R1，＃26H，＃MAIN3

MOV R1，＃30H

MOV R1，A

MAIN4：INC R1

MOV @R1，A

CJNE R1，＃3BH，＃MAIN4

MOV 3DH，＃2EH

MOV 3EH，＃24H

MOV 3FH，＃FFH

MOV 8BH，＃FFH

MOV 8DH，＃FFH

MOV 89H，＃10H

MOV 81，＃50H

MOV 22H，＃OAM

MOV 232，H＃OBH

MOV 24H，＃OCH

MOV 25H，＃ODH

MOV P3，＃11H

REPEAT：ACLL DISUP

TAKEAD：MOV A，＃03H

ANL A，26H

MOV P1，A

MOV P3，＃21H

MOV P1，＃FFH

MOV P3，＃02H

MOV A，P1

SWAP A

MOV 30H，A

MOV P3，＃03H

MOVA，P1

SWAP A

MOV 31H，A

ACALL DISUP

KEYON：MOV P3，＃01H

ASCALL D20MS

MOV R4，P1

MOV A，R4

ANL A，＃FOH

MOV 20H，A

MOV A，R4

ANL A，＃0FH

KEYDN1：CJNE A，＃01H，＃KEYDN2

SETB 00H

AJMP ＃KEYDN5

KEYDN2：CJNE A，＃02H，＃KEYDN3

SETB 01H

AJMP ＃KEYDN5

KEYDN3：CJNE A，＃04H，＃KEYDN4

SETB 02H

AJMP ＃KEYDN5

KEYDN4：CJNE A，＃08H，＃KEYDN5

SETB 03H

KEYDN5：ACALL DISUP

MOV P1，＃FFH

DENS1：CJNE A，＃02H，＃TEMP

MOV A，R0

MOV DPTR，＃DENTAB

MOVC A，@A+DPTR

MOV 32H，A

UPFLD：XRL A，＃FFH

JZ ＃INSEND1

MOV A，32H

DOFLD：XRL A，＃00H

JE ＃INSEND1

ACALL ＃DENBCD

TEMP：CJNE A，＃00H，＃LIFE

MOV A，R0

MOV DPTR，＃TEMTAP

MOV A，@A+DPTR

MOV 33H，A

UPFLT：XRL A，＃FFH

JZ ＃INSEND2

MOV A，33H

DOFLT：XRL A：＃00H

JZ ＃INSEND2

ACALL TEMBCD

LIFE：MOV A，R0

CLR C

RRC A

MOV DPTR，＃LIFTAB

MOVC A，@A+DPTR

MOV 34H，A

UPFLL：XR2 A，＃FFH

JZ ＃INSEND

MOV A，34H

DOFLL：XRL A，＃00H

JZ，＃INSEND

ACALL LIFBCD

INSEND ACALL DISUP

MOV A，26H

ANL A，＃03H

MOV R5，A

TEMJP：XRL A，＃00H

JNZ ＃DENJP

CLR 30H

SETB 31H

AJMP ＃REPEAT

DENJP：MOV A，R5

XRL A，＃02H

JNZ ＃LIFJP

SETB 30H

SETB 31H

AJMP ＃RETEAT

LIFJT：CLR 30H

CLR 31H

ACALL TEMCOM

ACALL DCON

ACALL DCON2

ACALL DCON3

CONTR：ACALL ＃DISUP

JNB 07H，＃CONTR1

JB 35H，＃CONTR2

SETB 8EH

SETB AFH

SETB ABH

SETB 35H

CLR 36H

CONTR2：CLR 0FH

CLR 0CH

CLR 0DH

SETB 0EH

AJMP ＃OUTPUT

CONTRE：JNB 35H，＃CONTR3

CLR AFH

CLR 8EH

CLR 35H

CONTR3：SETB OFH

UP：ACALL DISUP

MOV R0，＃30H

MOV A，@R0

ANL A，＃F0H

SWAP A

MOV R2，A

MOV A，@R0

ANL A，＃0FH

ADD A，R2

MOV B，＃0AH

DIV AB

MOV R4，B

MOV R3，A

INC R0

MOV A，@R0

ANL A，＃0FH

ADD A，R3

MOV B，＃0AH

DIV AB

MOV R3，B

MPV R2，A

MOV A，@R0

ANL A ＃F0H

SWAP A

ADD A，R2

MOV R2，A

UPCOM：MOV R0，＃3CH

MOV A，@R0

CLR C

CLR D6H

MOV R5，A

MOV A，R2

SUBB A，R5

JB D6，＃UPCOM1

DEC R0

MOV A，@R0

ANL A0H

SWAP A

CLR C

CLR D6

MOV R5，A

MOV A，R3

SUBB A，R5

JB D6，＃UPCOM1

MOV A，@R0

ANL A，＃0FH

CLR C

CLR D6H

MOV R5，A

MOV A，R4

SUBB A，R5

JNB D6H，＃DOWN

UPCOM1：CLR OCH

SETB 0DH

SETB 37H

AJMP ＃OUTCON

NOP

DOWN：ASALL DISUP

MOV R0，＃30H

MOV A，@R0

ANL A，＃0FH

MOV R2，A

MOV A，@R0

ANL A，＃F0H

SWAP A

CLR C

DLR D6H

SUBB A，R2

JNB D6H，＃DOWN1

MOV A，@R0

ANL A，＃F0H

SWAP A

ADD A，＃0FH

SUBB A，R2

MOV R4，A

INC R0

MOV A，@R0

ANL A，@＃0FH

CLR C

CLR D6H

SUBB A，@01H

DEC A

JNB D6，＃DOWN2

MOV A，@R0

ANL A，＃0FH

ADD A，＃0AH

CLR C

CLR D6H

SUBB A，＃01H

DEC A

MOV R3，A

MOV A，@R0

ANL A，＃F0H

SWAP A

DEC A

MOV R2，A

AJMP ＃DOWCOM

DOWN1：MOV R4，A

INC R0

MOV A，@R0

ANL A，＃0FH

MOV R3，A

MOV A，@R0

ANL A，＃F0H

SWAP A

MOV R2，A

AJMP ＃DOWCOM

DOWN2：MOV R3，A

MOV A，@R0

ANL A，＃F0H

SWAP A

MOV R2，A

DOWCOM：MOV R0，＃3CH

MOV A，@R0

CLR C

CLR D6H

SUBB A，R2

JB D6H，＃DOWCO1

DEC R0

MOV A，@R0

ANL A，＃F0H

SWAP A

CLR C

CLR D6H

SUBB A，R3

JB D6H，＃DOWCO1

MOV A，@R0

ANL A，＃0FH

CLR C

CLR D6H

SUBB A，R4

JB D6H，＃DOWCO1

SETB OCH

SETB ODH

CLR 37H

CLR 8EH

CLR AF

AJMP ＃POUTCON

DOWCO1：SETB OCH

CLR ODH

SETB 37H

OUTCON：ACALL DISUP

MOV C，06H

JC ＃OUTCO1

MOV C，37H

JNC ＃POUTCO2

JB 8EH，＃OUTCO2

SETB 8EH

SETB 36H

CLR 35H

SETB AFH

SETB ABH

OUTCO2：SETB 0EH

AJMP ＃OUTPUT

OUTCO1：CLR 0EH

JNB 37H，＃OUTCO3

SETB 34H

OUTCO3： SETB 0CH

SETB 0DH

CLR 8EH

CLR A

MOV A8H，A

* * * finishes * * * *

Claims

1, a kind of liquid measure controller is by proportion Pass sensor (1); Microprocessor (4); Amplifying circuit (2); Mould/number conversion circuit (3) and demonstration and control circuit (5) are formed, and it is characterized in that

A proportion Pass sensor is to quarrel 8 by differential type ash Gu Gou); Floating drum (6); Spring (7); Slide block (9); Connector (10); Shell (11); Fixed head (12), form, its connector one end connects floating drum, the other end connects floating block, Fu Kuai Even spring, spring suspension is on shell, shell and differential type displacement Pass sensor, fixed head are fixed together.

What the B microprocessor adopted is single chip microcomputer, and it is by the method for Soft spare Knitting journey, to the Wrong difference of proportion Pass sensor (1) and instrument total system compensate, data processing, collection and demonstration control.

2,, when it is characterized in that it carries out proportion compensation of error that temperature, turbidity, liquid level cause with the method for single chip microcomputer software programming, can increase temperature sensor (13) according to the described liquid measure controller of claim 1; Turbidity sensor (15); Liquid level sensor (14).