CN1009956B - Automatic titrator for turbidity - Google Patents
Automatic titrator for turbidityInfo
- Publication number
- CN1009956B CN1009956B CN 87104078 CN87104078A CN1009956B CN 1009956 B CN1009956 B CN 1009956B CN 87104078 CN87104078 CN 87104078 CN 87104078 A CN87104078 A CN 87104078A CN 1009956 B CN1009956 B CN 1009956B
- Authority
- CN
- China
- Prior art keywords
- titration
- turbidity
- speed
- phototriode
- volume pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Images
Landscapes
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The present invention relates to an electronic measurement analyzing device used for automatic titration. An optical signal is converted into an electric signal varying with the turbidity of a measured solution by using the photoelectric conversion technology, the processes of titration, the judge of a titration end point and the measurement are automatically carried out, and the measured solution is quickly stirred and slow nitrated when the titration end point approaches to enhance the analytic precision. The judge of the titration end point and the stirring speed can be regulated according to the analytic requirements. The whole device is composed of a photoelectric conversion unit, a control unit, a stirring unit, a digital metering pump and a power system, wherein by using the digital metering pump, the metering accuracy is ensured to be (+/-)0.01 ml. The device has a high-speed titration mode, a constant-speed titration mode and an automatic low-speed titration mode. The present invention solves the greatest defects of the difficult judge of end points through manual titration and large artificial errors and has the advantages of simple structure and convenient operation.
Description
The present invention is a kind of electronic measuring and analysis Instrument, is used for the mensuration of carbon black specific surface etc.
The mensuration of carbon black specific surface, what adopt in the instrumental method is the ATMAST autotitrator that ISO recommends, and it is by containing liquid device, constant speed volume pump, photoelectric conversion unit formations such as (comprising prime amplifier, difference engine, comparer, timer conter, motor operated switch).Its weak point is to have only a kind of rate of titration, the signal poor sensitivity that photoelectric cell produces, and instrument can not directly show measurement result.Manual method error at measurment with national standard " GB3780.5-83 " regulation is just bigger.
The purpose of this invention is to provide has three kinds of rates of titration, directly shows measurement result with charactron, the turbidity autotitrator that sensitivity and measuring accuracy are higher.
Fig. 1 is an autotitrator structural principle block diagram.Autotitrator is made of photoelectric conversion unit, control module, agitating unit, digital metering units, power-supply system.
1. photoelectric conversion unit is made up of light source (1), lens combination (2), titration cup (3), photoelectric commutator (4).Finish the conversion between the electric signal that light signal changes with turbidity, for the judgement of titration end-point provides signal to control circuit, the light that light source (1) sends forms and the vertical parallel beam of titration cup (3) through first lens.After assembling, second lens impinge upon on the photoelectric commutator (4) again.According to the technical indicator that the requirement (as judging color or turbidity variable condition) and the measured matter of titrimetry judgement are analyzed, each several part can be done corresponding selection in the opto-electronic conversion.When being used for the carbon black analysis, light source (1) is used the DC6V/3W bulb, lens combination (2) adopts two magnifications to be 10 convex lens and to place titration cup (3) both sides, and titration cup (3) is the square quartz glass of 30～200ml, and photoelectric commutator is for receiving the phototriode of optic angle greater than 15 degree.
2. control module (comprises the BG among Fig. 4 by controller (5)
1, BG
2, IC1, IC2, IC3, BG
3, BG
4, J
1, J
2, Jd, Js) and operating key (6) (comprising " power supply ", " imbibition ", " titration ", " stopping ", " rate selection switch " among Fig. 5) form.Realize manual control, the automatic control of autotitrator.
3. agitating unit is made up of the motor among Fig. 1 (7) (being the motor M 2 among Fig. 4), stirrer (8), stirrer (9).Realize detected solution and vs homogeneous reaction in the titration cup (3).
4. digital metering units is made up of volume pump (10), pulse shaping circuit (11), count display (12) and the operating key (6) of Fig. 1.Realization is carried out automatic gauge to vs.
Fig. 2 is the volume pump structural representation.
Volume pump adopts reversible electric machine (15) (being the motor M 1 among Fig. 4) to make it have the function of forward and backward.Variator (16) is to increase (subtracting) fast gear set according to the design of different speed ratios, shift fork (24) plays the role of changing, " speed selection " switch among Fig. 5 is removed to " fast " position, then shift fork (24) is downward, volume pump plunger (18) upwards (or downwards) operation of speed to divide greater than 20ml/, with as " speed selection " switch among Fig. 5 to " constant speed " position, then shift fork (24) is upwards, the volume pump plunger, (18) are with upwards (or the downwards) operation of 4ml/ component velocity.Screw rod is paid the measuring accuracy of (17), plunger (18) decision pump among Fig. 2.Frequency multiplier (19) is the transparent plate that tooth, groove are divided equally, and when autotitrator was used for the carbon black analysis, frequency multiplier (19) designed in 1: 100 ratio.Combined sealing ring (21) seals when plunger (18) is moved up and down in pumping cylinder (22).Three-way cock (23) decision vs sucks (or release) pumping cylinder (22), and vs sucks in the pumping cylinder (22) from the Sheng liquid device (13) of Fig. 1 during with its dextrorotation, and is left-handed then with the interior vs release of pumping cylinder (22).Screw rod is paid measuring accuracy that screw mandrel on (17) and high-precision plunger (18), combined sealing ring (21) and three-way cock (23) guarantee volume pump and is ± 0.01ml.Upper and lower limit bit switch (25), the stroke of (26) decision plunger (18) in pumping cylinder (22).When plunger (18) rises (or decline) during to pumping cylinder (22) top (or bottom), upper and lower limit bit switch (25), (26) all cut off the power supply of reversible electric machine (15) and plunger (18) are stopped.
During volume pump work, frequency multiplier among Fig. 2 (19) rotates with it synchronously, its tooth, groove is with quick (or constant speed, at a slow speed) alternately by the photoelectric sensor (20) among Fig. 2, the infrared light that the infrarede emitting diode in the BK sends among Fig. 4 is cut with the speed identical with frequency multiplier (19), the receiving end acquisition dutycycle of BK is 1 pulse signal, after pulse shaping circuit in Fig. 3 (11) shaping, produce count pulse CP and be input to counter shown in Figure 3 (27), through register (28), decoder driver (29) is gone up demonstration at charactron (30).Fig. 3 is an autotitrator counting block diagram.
5. power-supply system, the power supply among Fig. 1 (14) adopt the integrated three-terminal regulator W317 shown in Fig. 4 to form D.C. regulated power supply, export independently three-way direct current power supply V1, V2, V3.
Fig. 4 is the autotitrator electrical schematic diagram.
Principle of work of the present invention is:
One, measures preparation
1. start, instrument is in preheat mode
Press " power supply " key, contact 1-2 connection～220V, contact 4-5 connects, and " power supply " pilot lamp is bright, stabilized voltage supply output three-way power V1, V2, V3.
2. imbibition
Press " imbibition " key, contact 4-5 connects, and " imbibition " pilot lamp is bright.Driving voltage～the 127V of volume pump reversible electric machine M1 among Fig. 4 is via WK2, " imbibition " key contact 2-1, relay J d3-2 is added in 2 ends of motor M 1, simultaneously, control voltage～127V of reversible electric machine M1 is added in 3 ends of motor M 1 through relay J s1-2, reversible electric machine M1 counter-rotating, volume pump plunger (18) among Fig. 2 moves downward, vs from contain liquid device (13) in three-way cock (23) sucks pumping cylinder (22), when plunger (18) arrives pumping cylinder (22) bottom down, lower position switch (26) is backed down, cut off the driving voltage of reversible electric machine M1, volume pump is out of service, and instrument is in the titration state for the treatment of.
Two, titration
Press " titration " key, its contact 4-5 connects, and " titration " pilot lamp is bright, the automatic according to the following steps analysis to measure of autotitrator.
1. " titration " key contact 1-2 connects, and produces a pulse, produces return-to-zero pulse R ' after return-to-zero pulse shaping circuit (11) shaping in Fig. 3, is added in each the return-to-zero end of the IC6 among Fig. 4, makes charactron (30) return-to-zero automatically among Fig. 3 '.
2. " titration " key contact 11-10 connects, and light source bulb D1, D2 are bright.
3. constant speed titration
When controlling voltage～127V when relay J s1-2 is added in 3 ends of reversible electric machine M1, because the illumination of bulb D1, D2, the BG1 conducting, IC2 exports high level, switch triode BG2 conducting, relay J 1 action, the contact 4-5 of J1 connects and makes relay J d action, then～127 through WK1, " titration " key contact 7-8, relay J d7-8 and Jd4-5, be added in 1 end of reversible electric machine M1 by capacitor C o phase shift, reversible electric machine M1 just changes.Volume pump plunger (18) among Fig. 2 just moves upward with the constant speed that 4ml/ divides, and the vs in the pumping cylinder (22) is splashed in the titration cup (3) by the capillary titration pin (31) among Fig. 5 through three-way cock (23).
4. magnetic agitation
After relay J 1 action, its contact Jd1-2 connects, and control voltage～15V of stirring motor M2 is through potentiometer W
3, relay J
23-2 is added in motor M
23 ends, motor M
2Driving voltage～100V after capacitor C o phase shift, be added in motor M
21 end, motor M
2The stirrer (8) that running drives among Fig. 1 rotates, and stirrer (8) is gone up opposite polarity magnet N, S rotates the ferromagnetism stirrer (9) in the titration cup (3) with it synchronously, makes detected solution and vs homogeneous reaction in the titration cup (3).Regulator potentiometer W
3Can change motor M
2The size of control voltage makes stirring rate variable.
5. stir slowly soon and drip
Along with the carrying out of titration, the solution turbidity of titration cup among Fig. 1 (3) lining increases gradually, and the light that then sees through titration cup (3) weakens, and impinges upon BG
3On light also weaken, when closing on maximum turbidity, BG
3Become by conducting and to end IG
3The output high level, switch triode BG
4Communicate relay J
2Action, its contact J
21-2 connects, with potentiometer W
3Short circuit promptly is added in motor M to～15V
23 ends, motor M
2It is the fastest to obtain the maximum controlling voltage rotating speed, and stirrer is stirred soon.
Relay J
2Contact J
21-2 connects, relay J
sAction, its contact J
s1-2 continues out, J
s3-2 connects, and then is added in reversible electric machine M
13 ends on control voltage become～30V reversible electric machine M by～127V
1Become at a slow speed by constant speed, volume pump (10) realizes dripping slowly (1ml/ branch).
6. judge titration end-point automatically
When titration reached terminal point, the solution turbidity of the titration cup among Fig. 1 (3) lining became maximum, made BG this moment
1The light that obtains is the most weak and end IC
2Output low level makes BG
2End relay J
1Discharge its contact J
14-5 disconnects relay J d is discharged.Relay J d4-5 and Jd7-8 all disconnect, and cut off reversible electric machine M
1Driving voltage～127V, reversible electric machine M then
1Stall, volume pump plunger (18) stop to rise titration are stopped, and count display (12) shows the titration final value.
Relay J
1Contact J
11-2 disconnection～15V, motor M
2Stall makes stirrer (8) stop to stir.
In automatic decision circuit and stirring control circuit, designed by resistance R
1, potentiometer W
1And resistance R
2Potentiometer W
2The resistor network of forming is regulated W
1Can make the judgement of titration end-point reach the analysis requirement of detected solution, regulator potentiometer W
2Realization is stirred soon ooze the existing time slowly variable.
Three, titration metering
Autotitrator is realized the judgement and the metering of titration end-point with the contactless optical power conversion technology.In Fig. 1, after the light transmission that light source (1) sends is equipped with the titration cup (3) of detected solution, impinge upon on the high-sensitive photoelectric commutator (4), the electric signal that obtains to change with solution turbidity is to control automatically.Designed digital metering units simultaneously vs has been made automatic gauge.
When titration begins, the charactron among Fig. 3 (30) return-to-zero at first automatically.After volume pump reversible electric machine (15) rotates, producing dutycycle by frequency multiplier (19) in photoelectric sensor (20) is 1 pulse, the count pulse that pulse is sent among Fig. 3 forms circuit (11) (promptly adding IC4 by the BK output terminal among Fig. 4 through GO), after shaping, produce count pulse CP and send into decade counter (27) accumulated counts of starting from scratch, and show by charactron (30).When titration was reached home, titration stopped, frequency multiplier (19) stall, and photoelectric sensor (20) stops to send the detection pulse, and counter (27) stops counting, and the displayed value on the charactron (30) is the titer of accuracy of reading to ± 0.01ml.
The present invention has successfully solved the deficiency of manual method and ATMAST autotitrator, and the advantage of this turbidity autotitrator is:
1. only just realized titrimetry with three function keys in the operating key on the instrument panel (being " imbibition ", " titration ", " stopping " key among Fig. 5), and in titration at the end immediately rapidly, the precision with ± 0.01ml shows the titration final value exactly.
2. realize automatic titration, titration end-point judgement and automatic gauge, analysis result high conformity with highly sensitive contactless optical power conversion technology.
3. design the high digital metering units of precision and definition, improved the measuring accuracy and the reliability of vs volume (milliliter number).
4. the present invention carries out surface area measurement of black, only uses ISO6810-1985(E) half component analysis of standard code, (compare with the approval value and be not more than ± 0.75m by measured value less than the regulation of this standard for measuring error
2/ g), be better than the mensuration precision of ATMAST.
5. the present invention is simple in structure, and operation, easy to maintenance has test analysis effect fast and accurately.
Fig. 5 is the autotitrator shape assumption diagram.
The method of manipulating of the present invention is:
1. press " power supply " key among Fig. 5, connection～220V, instrument is in preheat mode.
2. three-way cock (23) dextrorotation, " speed selection " switch is screwed into " fast " position, press " imbibition " key, plunger (18) moves downward, vs promptly from contain liquid device (13) in three-way cock (23) sucks volume pump pumping cylinder (22).When plunger (18) arrived pumping cylinder (22) bottom down, instrument stopped automatically.
3. press " stopping " key, instrument is in the titration state for the treatment of.
4. by the titrimetry requirement detected solution is put into quartz glass titration cup (3), then titration cup (3) is placed a glass groove (32)." speed selection " switch is screwed into " constant speed " position, and three-way cock (23) is left-handed.
5. press " titration " key, the automatic return-to-zero of instrument, plunger (18) rises with the 4ml/ component velocity, vs is splashed into the titration cup (3) by capillary titration pin (31) through three-way cock (23) in pumping cylinder (22), simultaneously, charactron (30) is started from scratch to add up and is shown vs volume (milliliter number).
6. when titration closed on maximum turbidity, instrument was realized " stir slowly soon and drip ", and solution is through stirring the generation maelstrom soon in the titration cup, and capillary titration pin drips slowly, and charactron (30) accumulated counts is slack-off.
7. when being titrated to maximum turbidity, instrument stops titration, and stirrer stops to stir, and charactron (30) shows the titration final value.
8. press " stopping " key, take out titration cup (3), prepare to measure next time.
Claims (7)
1, a kind of turbidity autotitrator comprises and contains liquid device, photoelectric conversion unit, control module, magnetic agitation unit and digital metering units, it is characterized in that:
A. described photoelectric conversion unit is the photoelectric conversion device that is made of light source (1), lens combination (2), the fixed cup of square quartzy glass drop (3) and photoelectric commutator (4);
B. described control module is (to contain phototriode BG1, BG3 by controller (5), switch triode BG2, BG4, digital integrated circuit IC1, IC2, IC3, relay J 1, J2, Jd, Js etc.), operating key (6) (containing " power supply ", " imbibition ", " titration ", " stopping " key and " speed selection " switch) manual control, the automatic control circuit that constitute;
C. described digital metering units is to be made of volume pump (10), pulse shaping circuit (11), count display (12) and operating key (6).
2, turbidity autotitrator according to claim 1 is characterized in that described lens combination (2) is that two magnifications are 10 convex lens, and places the both sides of titration cup (3).
3, turbidity autotitrator according to claim 1 and 2 is characterized in that the optical convergence that described lens combination (2) is sent light source (1) becomes some light signal direct irradiation on photoelectric commutator (4).
4, turbidity autotitrator according to claim 1, it is characterized in that the phototriode BG1 in the described controller (5), digital integrated circuit IC1, IC2, switch triode BG2, relay J 1, Jd and resistance R 1, potentiometer W1 constitutes the adjustable automatic decision circuit of terminal point of phototriode BG1 output terminal current potential; Phototriode BG
3, digital integrated circuit IC3, switch triode BG4, relay J 2, Js and resistance R 2, potentiometer W2 constitutes adjustable the stirring soon of phototriode BG3 output terminal current potential and drips circuit slowly.
5,, it is characterized in that described photoelectric commutator (4) is to receive the phototriode of optic angle greater than 15 degree according to claim 1 or 4 described turbidity autotitrators.
6, turbidity autotitrator according to claim 1 is characterized in that volume pump (10) is the pusher measuring apparatus of being paid (17), plunger (18), frequency multiplier (19), photoelectric sensor (20), combined sealing ring (21), pumping cylinder (22), three-way cock (23), shift fork (24), upper and lower limit bit switch (25,26), capillary titration pin (31) formation by reversible electric machine (15), variator (16), screw rod.
7, according to claim 1 or 6 described turbidity autotitrators, it is characterized in that when the rate selection switch of controller (5) is pulled to " fast " (or " constant speed ") position, the shift fork (24) of volume pump (10) is (or upwards) downwards, the plunger (18) of volume pump (10) is with greater than 20ml/min(or with 4ml/min) upwards (or downwards) operation of speed, when instrument stirs when dripping slowly soon, by the effect of controller (5), the plunger (18) of volume pump (10) is with the 1ml/min slow running.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87104078 CN1009956B (en) | 1987-06-02 | 1987-06-02 | Automatic titrator for turbidity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87104078 CN1009956B (en) | 1987-06-02 | 1987-06-02 | Automatic titrator for turbidity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN87104078A CN87104078A (en) | 1988-01-20 |
| CN1009956B true CN1009956B (en) | 1990-10-10 |
Family
ID=4814716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87104078 Expired CN1009956B (en) | 1987-06-02 | 1987-06-02 | Automatic titrator for turbidity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1009956B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1036735C (en) * | 1993-03-26 | 1997-12-17 | 马德举 | Titration apparatus |
| US5528521A (en) * | 1994-05-27 | 1996-06-18 | Hoffmann-La Roche Inc. | Titration emulation system and method |
| CN104215588A (en) * | 2013-05-30 | 2014-12-17 | 上海勇规分析仪器有限公司 | Titration apparatus capable of adjusting titration and color inspection condition |
| CN106290704A (en) * | 2015-06-23 | 2017-01-04 | 中美华世通生物医药科技（武汉）有限公司 | Titration system and titration method |
| CN104964972A (en) * | 2015-06-30 | 2015-10-07 | 开平市中青环保技术服务有限公司 | Method and apparatus for determining titration end point and realizing automatic titration analysis by means of vision sensor |
| CN105403660A (en) * | 2015-12-16 | 2016-03-16 | 济南海能仪器股份有限公司 | Titration reaction apparatus |
| CN105606761B (en) * | 2015-12-23 | 2017-11-10 | 深圳市清时捷科技有限公司 | A kind of reaction end judgment means and five step iodimetric titration |
| CN105717111A (en) * | 2016-04-29 | 2016-06-29 | 中储粮成都粮食储藏科学研究所 | Automatic titration device capable of detecting change in colour of solution based on machine vision and detection method thereof |
| CN106770908A (en) * | 2016-11-21 | 2017-05-31 | 中国水产科学研究院黄海水产研究所 | A kind of multi-functional titrator of high flux and application method |
-
1987
- 1987-06-02 CN CN 87104078 patent/CN1009956B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN87104078A (en) | 1988-01-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1009956B (en) | Automatic titrator for turbidity | |
| CN100537035C (en) | Multichannel electronic liquor-transferring system with standard signal interface | |
| CN1176372C (en) | A potentiometric titration instrument | |
| CN105717111A (en) | Automatic titration device capable of detecting change in colour of solution based on machine vision and detection method thereof | |
| US11719623B2 (en) | Slurry material uniformity detection device and detection method | |
| CN110044896B (en) | Full-automatic titrator for volumetric titration and working method thereof | |
| CN103323454A (en) | Color indicator automatic titration analyzer and application method thereof | |
| CN2141084Y (en) | Automatic alkalimeter | |
| CN1076476C (en) | Karl Fischer Moisture determination instrument | |
| CN218872250U (en) | Micro-fluidic chip reagent filling instrument | |
| CN210108963U (en) | Wet process chemical parameter on-line detecting instrument | |
| CN111781907A (en) | Detection control circuit of wine machine | |
| CN217533310U (en) | Offline glue filling system | |
| CN215218458U (en) | Automatic measuring device for ore pulp sedimentation experiment | |
| CN2084619U (en) | Automatic titration analysis device | |
| CN2293072Y (en) | Karl-Fischer moisture measuring apparatus | |
| CN1306209A (en) | Photometric titrate reactor without interference | |
| CN2118989U (en) | Automatic titration instrument | |
| CN218371690U (en) | Multi-functional intelligent test tube uncapping machine | |
| CN2916628Y (en) | Automatic foodstuff and oil analyzer | |
| CN215375106U (en) | Chloride ion detection device based on image recognition | |
| CN210108962U (en) | Automatic change on-line measuring device | |
| CN212417612U (en) | Cetane number improver stirring device | |
| CN115290514B (en) | Aerobic granular sludge culture effect testing device based on Internet of things control | |
| CN210269625U (en) | Full-automatic titrator for volumetric titration |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |