CN2906703Y - Digital indicator for measurement and control of solar water heater level - Google Patents

Digital indicator for measurement and control of solar water heater level Download PDF

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Publication number
CN2906703Y
CN2906703Y CNU2006200821625U CN200620082162U CN2906703Y CN 2906703 Y CN2906703 Y CN 2906703Y CN U2006200821625 U CNU2006200821625 U CN U2006200821625U CN 200620082162 U CN200620082162 U CN 200620082162U CN 2906703 Y CN2906703 Y CN 2906703Y
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China
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circuit
coil
water level
end cover
ball float
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Expired - Fee Related
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CNU2006200821625U
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Chinese (zh)
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郑在华
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Individual
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Individual
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers

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  • Level Indicators Using A Float (AREA)

Abstract

The utility model relates to a digital water level control display for solar water heaters, which is characterized in that: coils of a coil self-coupling sensor are sealed in a coil sealing pot; a connecting rod made from ferromagnetic material which is arranged at the top end of a floating ball can move up and down in the centre hole of the coils; coil lead of the coils is connected to the operational amplifier of the automatic zero circuit through rectifier circuit; the output terminal of the operational amplifier is connected to the A/D converter of the control circuit. The sensor of the utility model is contacted with water indirectly, can digital display and control the water level at any time, and has the advantages of simple structure, far distance signal transmission, accurate and reliable measurement and low cost.

Description

A kind of solar water heater water level measuring and controlling digital indicator
(1) technical field
The utility model belongs to the level measurement instrument field, can directly show water level, a kind of specifically solar water heater water level measuring and controlling digital indicator.
(2) background technology
Prior solar water heater level measuring technology has and adopts electric pole type, the ultrasonic sensor formula that adopts also arranged, because they must touch with the watertight cut-grafting and could transmit electric signal better.Electrode and probe are under water, and its incrustation scale is very easily sticking stifled electrode and sensing probe, makes to measure and loses efficacy.Float level meter is to be measuring sensor with the magnetic float, with the tongue tube on the relevant position in the lifting adhesive sensor of liquid level, thereby make the all-in resistance (or voltage) in the sensor take place to change accordingly, the pattern of the water level of measuring with gear shown, can not show concrete water yield data at any time.A kind of floodometer of partly forming by level sensor, float, rope sheave, weight, signal cable, measurement and control instrument etc., can be supporting with the waterlevel data acquisition processing system, though can show concrete water yield data, but its level sensor and waterlevel data acquisition process are very complicated and cost an arm and a leg, and are not suitable for being used for solar water heater.
(3) summary of the invention
The utility model is exactly in order to overcome the shortcoming in the above-mentioned technology, propose a kind of simple in structure, the solar water heater water level measuring and controlling digital indicator that cost is low.The sensor of this measuring instrument does not directly contact with water, can show and control the water level of solar water heater at any time with numeral.
Goal of the invention of the present utility model is realized by following technical scheme: a kind of solar water heater water level measuring and controlling digital indicator, the coil 5 that it is characterized in that coil autocoupling type sensor is sealed in the coil sealing bore 6, the connecting rod 13 of the ferromagnetic material of ball float 15 upper ends can move up and down in the center pit of coil 5, the coil lead 4 of coil 5 is connected with the operational amplifier 21 of automatic zero circuit 20 by rectification circuit 10, and the output terminal 18 of operational amplifier 21 is connected with the A/D transducer 27 of control circuit 26.
The water-level fluctuation of water receptacle moves up and down connecting rod 13 in coil 5 center pits, cause that coil 5 output voltages change accordingly, by the aanalogvoltage conversion, becomes digital signal, can show the water level situation.
Coil sealing bore 6 two ends are connected with upper end cover 3, bottom end cover 9, and coil fairlead 22 is arranged on the barrel.
Upper end cover 3, bottom end cover 9 and coil sealing bore 6 have formed the installing space of coil 5.
Coil 5 has around the centre on the reel 8 of through hole, and interior pipe 1 runs through the center pit of reel 8 and upper end cover 3, bottom end cover 9; Upper and lower rubber seal 2 is between reel 8 and upper end cover 3, bottom end cover 9, and the outer wall of its endoporus and interior pipe 1 closely cooperates; The space that coil sealing bore 6 and upper end cover 3, bottom end cover are 9 is full of encapsulant 7.
Rubber seal 2 has been avoided in perfusion in coil sealing bore 6 during encapsulant, and encapsulant spills from the inwall gap of the outer wall of interior pipe 1 and upper end cover 3, bottom end cover 9 center pits; Encapsulant 7 has sealed the measurement coil 5 of sensor, makes it to have avoided moisture to scurry into and contact with water, and encapsulant can adopt epoxy resin.
Ball float 15 spiral-locks are in cup-shaped ball float tube 16, and ball float 15 can fluctuate in ball float tube 16; Ball float tube 16 lower ends and water are logical, and the upper end is porose, and the protruding cover in the bottom of bottom end cover 9 penetrates in the ball float tube 16 from ball float tube 16 upper end holes, engage the lower end threaded engagement of hold-doun nut 12 and bottom end cover 9.
The position of ball float tube 16 control ball floats 15 makes connecting rod 13 be arranged in pipe 1 endoporus; Engaging hold-doun nut 12 makes ball float tube 16 be connected with bottom end cover 9 with the lower end threaded engagement of bottom end cover 9.
Connecting rod 13 sealed materials are poured in the glass tube 14, and its lower end and ball float 15 are fixed together, and the glass tube that is perfused with connecting rod 13 can move up and down for 1 li at interior pipe.
Encapsulant can adopt epoxy resin, and the encapsulant exclusion of water has sealed connecting rod 13, has prevented the corrosion of connecting rod 13.
The output voltage of coil lead 4 is exported after half-wave rectification by rectification circuit 10 and the Filtering Processing, through being connected with the input end of the operational amplifier 21 of automatic zero circuit 20 after potentiometer W10 and resistance R 15 dividing potential drops.Rectification circuit 10 mainly is made up of half-wave rectification diode and electrochemical capacitor C7.
One termination of potentiometer W11 in the automatic zero circuit 20+5V power supply, sliding end connects the inverting input of operational amplifier 21 through resistance R 12, the inverting input and the output terminal of resistance R 13 cross-over connection operational amplifiers 21, the output terminal 18 of operational amplifier 21 connects the potentiometer W19 of control circuit 26.
Control circuit 26 is to connect single chip circuit 28 by A/D transducer 27, connects water management circuit 25 and shows signal driving circuit 29 respectively by single chip circuit 28 again, and shows signal driving circuit 29 connects water level display circuit 24.
Potentiometer W19 in the control circuit (26) joins through resistance R 20 and A/D transducer (27); A/D transducer (27) is connected the input end of IC1 in the single chip circuit (28) by the output terminal of IC6, the output terminal of IC1 connects (25) input end of water management circuit and the input end of the middle IC3-IC5 of shows signal driving circuit (29) respectively in the single chip circuit (28), and the output terminal of IC3-IC5 connects the input end of SHM1-SHM3 in the water level display circuit (24) in the shows signal driving circuit (29).
When water level rose, the length of pipe 1 inside increased gradually in connecting rod 13 entered, and the voltage at coil 5 two ends increases, and voltage carries out rectifying and wave-filtering through rectification circuit 10, after R15 and potentiometer W10 carry out dividing potential drop, send voltage automatic zero circuit 20.The analog voltage signal that output terminal 18 output of operational amplifier 21 has changed, send A/D transducer 27 to carry out aanalogvoltage is transformed into digital signal through potentiometer W19 and resistance R 20, digital signal after the conversion is input to the input end of single chip circuit 28, the output terminal of single chip circuit 28 is served water management circuit 25 with the water level control signal, simultaneously send shows signal driving circuit 29 the water level digital signal, water level digital signal display circuit 24 shows the concrete numeral of expression heights of water level, otherwise principle of work is then when water level reduces.
Sensor of the present utility model does not directly contact with water, can be at any time shows and control water level with numeral, has simple in structurely, and long distance of signal transmission is measured accurately and reliably the advantage that cost is low.
(4) description of drawings
Fig. 1 is the structural representation of the utility model sensor;
Fig. 2 is a kind of structural representation of ball float and connecting rod;
Fig. 3 is a circuit block diagram of the present utility model;
Fig. 4 is the utility model circuit theory diagrams;
(5) embodiment
Pipe 1 is a glass tube in shown in Fig. 1,2.There are upper end cover 3, bottom end cover 9 in coil sealing bore 6 two ends, and coil fairlead 22 is arranged on the barrel, and coil 5 is in the winding slot of wherein reel 8, and interior pipe 1 penetrates in the center pit of upper end cover 3, bottom end cover 9, reel 8 of coil sealing bore 6.Rubber seal 2 is between reel 8 and upper end cover 3, bottom end cover 9, the outer wall of its endoporus and interior pipe 1 closely cooperates, rubber seal 2 has been avoided in perfusion in coil sealing bore 6 during encapsulant 7, and encapsulant spills from the inwall gap of the outer wall of interior pipe 1 and upper end cover 3, bottom end cover 9 center pits; The space that coil sealing bore 6 and upper end cover 3, bottom end cover are 9 is full of epoxy resin, epoxy sealing the measurement coil 5 of sensor, make it to have avoided moisture to scurry into and contact with water.Ball float tube 16 spiral-locks are on ball float 15, ball float 15 can fluctuate in ball float tube 16, the water of ball float tube 16 lower ends and water receptacle is logical, its upper end is porose, the protruding cover in the bottom of bottom end cover 9 penetrates in the ball float tube 16 from ball float tube 16 upper end holes, engages the lower end threaded engagement of hold-doun nut 12 and bottom end cover 9, and ball float tube 16 and bottom end cover 9 are linked together, the position of ball float tube 16 control ball floats 15 makes connecting rod 13 be arranged in pipe 1 endoporus.Connecting rod 13 adopts steel pole, and the fluctuation of water receptacle water level makes connecting rod 13 move up and down for 1 li at interior pipe, causes that coil 5 output voltages change accordingly, is transformed into digital processing by voltage automatic zero adjustment, aanalogvoltage, can show the water level situation.
Connecting rod 13 is poured in the glass tube 14 by epoxy resin, the fixedly connected plug in its lower end, and plug cooperates with screw on the ball float 15, and plug and screw are fixed together connecting rod 13 and ball float 15.The upper end that is perfused with the glass tube of connecting rod 13 is inserted in the interior pipe 1 and can be moved up and down, and the epoxy resin exclusion of water has sealed connecting rod 13, has prevented corrosion.
As Fig. 4, operational amplifier 21 is by IC7 (model: TL062CN), A/D transducer 27 is by IC6 (model: TLC1543CN), control circuit 26 is by IC1 (model: AT89C2051), driving circuit 29 is by IC3-IC5 (model: 74F164), (model: LG5011) etc. form by device by SHM1-SHM3 for display 24.
A/D transducer (27) is connected the input end of IC1 in the single chip circuit (28) by the output terminal of IC6, the output terminal of IC1 connects (25) input end of water management circuit and the input end of the middle IC3-IC5 of shows signal driving circuit (29) respectively in the single chip circuit (28), and the output terminal of IC3-IC5 connects the input end of SHM1-SHM3 in the water level display circuit (24) in the shows signal driving circuit (29)
Coil 5 is by lead-in wire 4 and the corresponding connection of rectification circuit 10 each element, and two input ends of operational amplifier 21 are connected with each counter element of front-end circuit respectively.The output terminal 18 of operational amplifier 21, through potentiometer W19 and resistance R 20, with model is that the A1 pin of IC6 of the A/D transducer 27 of TCL1543 is connected, and the CS of TCL1543, A0, D0, CLK, EOC pin are that P1.4, P1.3, P1.2, P1.1, P1.0, the pin of the IC1 of AT89C2051 single-chip microcomputer 28 links to each other with model respectively.The corresponding connection of the P3.0 pin of AT89C2051 model is A, the B bipod of the IC3-IC5 of 74F164 driving circuit 29, the CLK pin of corresponding each 74F164 of P3.1 pin.The QA pin of 74F164 links to each other with A, the B of inferior piece.Model is the corresponding connection of QA, QB, QC, QD, QE, QF, QG, QH of charactron a, b, c, d, e, f, each pin of g, h with the 74F164 of the SHM1-SHM3 of LG5011 display circuit 24.The b utmost point of the Q2 of last water management circuit 25 connects the P3.3 pin of AT89C2051 through resistance R 029.
When water level during in extreme lower position, adjust potentiometer W10 and make the voltage between capacitor C 9 and the resistance R 14 be+4-4.5V, adjust potentiometer W11 and make the output terminal 18 of operational amplifier 21 be 0V voltage.Water level is adjusted potentiometer W19 and is made numeral be shown as 100 when the extreme higher position.So far debugging finishes.
When water level rose, the length of pipe 1 inside increased gradually in connecting rod 13 entered, and the voltage at coil 5 two ends increases, and voltage carries out rectifying and wave-filtering through rectification circuit 10, after R15 and potentiometer W10 carry out dividing potential drop, send voltage automatic zero circuit 20.The analog voltage signal of the output terminal 18 output 0-1V of operational amplifier 21 send A/D transducer 27 to carry out analog converting through potentiometer W19 with resistance R 20 to become digital signal, digital signal after the conversion is input to single-chip microcomputer (model: input end AT89C2051), (model: output terminal AT89C2051) send shows signal driving circuit 29 water level signal to single-chip microcomputer, and water level digital signal display circuit 24 shows the concrete numeral of expression height of water level.
(model: output terminal AT89C2051) connects control automatically and goes up water circuit 25, realizes the upper limit of water level and the control of lower limit at single-chip microcomputer simultaneously.For example: be set to 80% as if peak level and stop to go up water with sun power, the lowest water level lower limit is set to 20% and begins to go up water, (model: input end AT89C2051) measures this two signals, can start water circuit 25 in the automatic control, realizes Water Level Control when single-chip microcomputer.
The basic mechanical design feature of measuring instrument:
1. measure height of water level scope 0～350MM
2. measuring accuracy ± %1MM
3. indication range 0～100
4. transmission range 300M (water receptacle is between the instrument)
5. working sensor environment temperature+1 ℃～100 ℃
6. sensor suitable environment temperature-20 ℃～+ 100 ℃
7. sensor uses supply voltage to exchange 25V
8. measure display instrument operating ambient temperature 0～+ 50 ℃
9. measure display instrument working environment humidity≤%60
10. measuring instrument uses the power supply alternating current 220V.

Claims (9)

1, a kind of solar water heater water level measuring and controlling digital indicator, the coil (5) that it is characterized in that coil autocoupling type sensor is sealed in the coil sealing bore (6), the connecting rod (13) of the ferromagnetic material of ball float (15) upper end can move up and down in the center pit of coil (5), the coil lead (4) of coil (5) is connected with the operational amplifier (21) of automatic zero circuit (20) by rectification circuit (10), and the output terminal (18) of operational amplifier (21) is connected with the A/D transducer (27) of control circuit (26).
2, a kind of solar water heater water level measuring and controlling digital indicator according to claim 1 is characterized in that coil sealing bore (6) two ends are connected with upper end cover (3), bottom end cover (9), have coil fairlead (22) on the barrel.
3, a kind of solar water heater water level measuring and controlling digital indicator according to claim 1, it is characterized in that coil (5) has around the centre on the reel (8) of through hole, interior pipe (1) runs through the center pit of reel (8) and upper end cover (3), bottom end cover (9); Upper and lower rubber seal (2) is positioned between reel (8) and upper end cover (3), the bottom end cover (9), and the outer wall of its endoporus and interior pipe (1) closely cooperates; Space between coil sealing bore (6) and upper end cover (3), bottom end cover (9) is full of encapsulant (7).
4, a kind of solar water heater water level measuring and controlling digital indicator according to claim 1 is characterized in that ball float (15) spiral-lock at cup-shaped ball float tube (in 16), and ball float (15) can fluctuate in ball float tube (16); Ball float tube (16) lower end and water are logical, and the upper end is porose, and the protruding cover in bottom of bottom end cover (9) penetrates in the ball float tube (16) from ball float tube (16) upper end hole, engage the lower end threaded engagement of hold-doun nut (12) and bottom end cover (9).
5, a kind of solar water heater water level measuring and controlling digital indicator according to claim 1, it is characterized in that the sealed material of connecting rod (13) is poured in the glass tube (14), its lower end and ball float (15) are fixed together, and the glass tube that is perfused with connecting rod (13) can move up and down in interior pipe (1) lining.
6, a kind of solar water heater water level measuring and controlling digital indicator according to claim 1, the output voltage that it is characterized in that coil lead (4), export after half-wave rectification by rectification circuit (10) and the Filtering Processing, through being connected with the input end of the operational amplifier (21) of automatic zero circuit (20) after potentiometer W10 and resistance R 15 dividing potential drops.
7, according to claim 1 or 6 described a kind of solar water heater water level measuring and controlling digital indicators, one termination+5V the power supply that it is characterized in that potentiometer W11 in the automatic zero circuit (20), sliding end connects the inverting input of operational amplifier (21) through resistance R 12, the inverting input and the output terminal of resistance R 13 cross-over connection operational amplifiers (21), the output terminal (18) of operational amplifier (21) connects the potentiometer W19 of control circuit (26).
8, a kind of solar water heater water level measuring and controlling digital indicator according to claim 7, it is characterized in that control circuit (26) is to connect single chip circuit (28) by A/D transducer (27), connect water management circuit (25) and shows signal driving circuit (29) respectively by single chip circuit (28) again, shows signal driving circuit (29) connects water level display circuit (24).
9, a kind of solar water heater water level measuring and controlling digital indicator according to claim 7 is characterized in that the potentiometer W19 in the control circuit (26), joins through resistance R 20 and A/D transducer (27); A/D transducer (27) is connected the input end of IC1 in the single chip circuit (28) by the output terminal of IC6, the output terminal of IC1 connects (25) input end of water management circuit and the input end of the middle IC3-IC5 of shows signal driving circuit (29) respectively in the single chip circuit (28), and the output terminal of IC3-IC5 connects the input end of SHM1-SHM3 in the water level display circuit (24) in the shows signal driving circuit (29).
CNU2006200821625U 2006-03-17 2006-03-17 Digital indicator for measurement and control of solar water heater level Expired - Fee Related CN2906703Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2006200821625U CN2906703Y (en) 2006-03-17 2006-03-17 Digital indicator for measurement and control of solar water heater level

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2006200821625U CN2906703Y (en) 2006-03-17 2006-03-17 Digital indicator for measurement and control of solar water heater level

Publications (1)

Publication Number Publication Date
CN2906703Y true CN2906703Y (en) 2007-05-30

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Family Applications (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102829563A (en) * 2012-06-14 2012-12-19 安徽国防科技职业学院 Automatic water supplying and breaking system of solar water heater
CN104121968A (en) * 2014-07-16 2014-10-29 山东大学 Material level measuring device and measuring method based on magnetoelectric effect
CN104180865A (en) * 2013-05-23 2014-12-03 天津市欧陆测控技术有限公司 Novel measuring cup

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102829563A (en) * 2012-06-14 2012-12-19 安徽国防科技职业学院 Automatic water supplying and breaking system of solar water heater
CN104180865A (en) * 2013-05-23 2014-12-03 天津市欧陆测控技术有限公司 Novel measuring cup
CN104180865B (en) * 2013-05-23 2019-06-28 李卓 A kind of novel measuring cup
CN104121968A (en) * 2014-07-16 2014-10-29 山东大学 Material level measuring device and measuring method based on magnetoelectric effect
CN104121968B (en) * 2014-07-16 2017-04-26 山东大学 Material level measuring device and measuring method based on magnetoelectric effect

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GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20070530