CN1339728A - Electrode type digital liquid level controlling device - Google Patents
Electrode type digital liquid level controlling device Download PDFInfo
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- CN1339728A CN1339728A CN 01114576 CN01114576A CN1339728A CN 1339728 A CN1339728 A CN 1339728A CN 01114576 CN01114576 CN 01114576 CN 01114576 A CN01114576 A CN 01114576A CN 1339728 A CN1339728 A CN 1339728A
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Abstract
The present invention discloses a kind of electrode type digital liquid level controlling device. Weak pulse signal detected by the sensor probe is treated before it is fed to digital pulse signal in A/D converter and used for logic operation and judgment in central controller to complete intelligent control. The present invention has stable running, low operation cost, strong antijamming capacity and low power consumption, and may be used in the intelligent control of various water supply and draining system.
Description
[technical field]
The present invention relates to a kind of self-actuated controller, relate in particular to a kind of electrode type digital liquid level controlling device.
[background technology]
The existing liquid level control mode of China, method are a lot, in the market still having of using:
1, five, the float-ball type in the sixties, dry-reed fluid level control device, all belong to the heavy-current control of the mechanical type of contact arranged, product specification is low, serviceable life is short, the cost height of job insecurity, poor reliability, particularly tongue tube, maintenance is extremely inconvenient again.
2, the light current control of liquid level heavy-current control of air pressure pot type and electronic circuit appear at late nineteen eighties.The control of air pressure tank liquid level also is the mechanical type heavy-current control that the contact is arranged, and belongs to pressure vessel, and volume is big, cost is high, versatility is poor, maintenance is also inconvenient.Electronic circuit light current control, because technical employing is improper to the selection of simulating signal processing and amplifying and material, the simulating signal poor anti jamming capability, so poor work stability is by air pressure gas tank formula control replacement.
3, begin to come into the market to the control of the nineties frequency conversion type liquid level, converter technology content is higher, and working stability is reliable, and applicability is wide, highly versatile, especially no tower constant pressure water supply is required to have stronger advantage than higher place, but frequency converter liquid level water supply opertaing device, cost is higher, the equipment energy loss relatively large (the frequency converter own loss generally nominal load about 8%), than higher, maintenance is difficulty relatively to operating personnel and maintainer's technical ability competency profiling.
[summary of the invention]
The object of the present invention is to provide a kind of stable, electrode type digital liquid level controlling device that running cost is low.
Ultimate principle of the present invention is: the present invention adopts the sensor probe electrode, with the sensor probe electrode detection to the micropulse signal import mould/number conversion circuit into after handling, convert reliable pulse digit level signal to, enter central controller again and carry out logical operation, judgment processing, thereby finish intelligent automatic control procedure.
The technical solution adopted in the present invention is: kind electrode formula digital liquid level controlling device, comprise a power circuit, it is characterized in that: power circuit links to each other with shaping circuit, Signal Spacing mould/number conversion circuit, central controller and peripheral hardware control circuit, and the corresponding work power supply is provided; Shaping circuit links to each other with an operate outside state detection circuit and at least one water level detection circuit, the level sensor line that water level detection circuit connects a ground connection reaches another root level sensor line at least, be connected with the sensor probe electrode respectively on the level sensor line of ground connection and the level sensor line, water level detection circuit receives from the sense current between the sensor probe electrode, the operate outside state detection circuit receives an external unit working state signal at least, and links to each other with Signal Spacing mould/number conversion circuit, shaping pulse frequency dividing circuit; One oscillatory circuit and peripheral hardware protection and driving circuit, shaping pulse frequency dividing circuit link to each other, peripheral hardware protection and driving circuit link to each other with the peripheral hardware control circuit, the peripheral hardware control circuit links to each other with at least one external unit (water pump, motor or boiler etc.) and controls its duty, and the shaping pulse frequency dividing circuit links to each other with central controller; Water level detection circuit and operate outside state detection circuit are to Signal Spacing mould/number conversion circuit output simulating signal; analog to digital conversion through Signal Spacing mould/number conversion circuit is exported digital signal corresponding to central controller, sends control signal corresponding through the processing of central controller to peripheral hardware protection and driving circuit and peripheral hardware control circuit.
Oscillatory circuit also connects a warning driving circuit, the warning driving circuit links to each other with warning circuit, analog to digital conversion through Signal Spacing mould/number conversion circuit is exported digital signal corresponding to central controller, also sends control signal corresponding to warning driving circuit and warning circuit simultaneously through the processing of central controller.
Warning circuit can connect loudspeaker; Be connected with two trigger switches on the central controller, the end ground connection of the trigger switch S2 of one of them, trigger switch S1 is triggered, central controller work, and trigger switch S2 is triggered, central controller quits work; Shaping circuit produces ac pulse voltage; The sensor probe electrode adopts stainless steel to make.
Beneficial effect of the present invention is: in the present invention, adopt the digitized processing of Signal Spacing mould/number conversion circuit, and logical operation, the judgment processing of process central controller realize intelligent automatic control procedure, thereby the present invention is stable, antijamming capability is strong, energy consumption is low, can be for a long time works reliably under rugged surroundings (as humidity, high temperature, low cold, thunder and lightning, electromagnetic interference, the interference of power-supply fluctuation etc.); Integrated design of the present invention makes that product is more suitable for producing in batches, can reduce the generation cost relatively, and this integrated design can make the bigger function extending space of product preparation, the corresponding control program with central controller of joining, not only reduced running cost of the present invention, make that more applicability of the present invention is wide, highly versatile, can be used for the town and country non-tower water supply, city high rise building supplies water, the plumbing of the sump of mine and smelting industry, the draining of coal mine explosion-proof formula sump, power house water level control, river course or reservoir level flood control flood prevention or control are observed and predicted, rural households' tap water etc. need the occasion of feedwater and draining, and can realize that unattended intelligentization operates automatically; Adopt peripheral hardware control circuit and warning circuit among the present invention, can make control procedure more directly perceived,, make external fault can be able to timely eliminating for the warning of external fault; The trigger switch of setting up direct control central controller operation on the central controller or stopping to be convenient to maintenance of the present invention; The sensor probe electrode adopts stainless steel to make, but anticorrosion, acid and alkali-resistance reduces maintenance cost, also makes work of the present invention more reliable.
In a word, compact conformation of the present invention, cost is low, reliability is high, highly versatile, good energy-conserving effect, applied widely, is suitable for multiple plumbing occasion and uses.
[description of drawings]
Fig. 1 is embodiment 1 circuit theory diagrams;
Fig. 2 is embodiment 2 circuit theory diagrams;
Fig. 3 is embodiment 3 circuit theory diagrams;
Fig. 4 is that embodiment 1 uses connection diagram;
Fig. 5 is that embodiment 2 uses connection diagram;
Fig. 6 is that embodiment 3 uses connection diagram.
[specific embodiment]
With embodiment the present invention is described in further detail with reference to the accompanying drawings below:
Embodiment 1:
According to Fig. 1 and Fig. 4, present embodiment comprises a power circuit 3, power circuit 3 and shaping circuit 1, signal isolation mode/number conversion circuit 5, central controller 7 and peripheral hardware control circuit 10 link to each other, and carry For corresponding working power; Shaping circuit 1 and an operate outside state detection circuit 4 and a water Position testing circuit 2 links to each other, and water level detection circuit 2 connects the level sensor line In of a ground connection and another Root level sensor line I1 is connected with respectively sensing on the level sensor line In of ground connection and the level sensor line I1 Device probe electrode 301, water level detection circuit 2 receives from the sensing between the sensor probe electrode 301 Electric current, operate outside state detection circuit 4 receives the working state signal I9 of water pump 70, and and signal Isolation mode/number conversion circuit 5, shaping pulse frequency dividing circuit 9 link to each other; One oscillating circuit 8 is protected with peripheral hardware Protect and drive circuit 101, shaping pulse frequency dividing circuit 9 links to each other, peripheral hardware protection and drive circuit 101 with Peripheral hardware control circuit 10 links to each other, and peripheral hardware control circuit 10 links to each other with water pump 70 and controls its duty, Shaping pulse frequency dividing circuit 9 links to each other with central controller 7; Water level detection circuit 2 and operate outside shape Attitude testing circuit 4 is to signal isolation mode/number conversion circuit 5 outputting analog signals, through the signal isolation mode The analog-to-digital conversion of/number conversion circuit 5 is to the corresponding data signal of central controller 7 outputs, in the process The processing of centre controller 7 is sent corresponding to peripheral hardware protection and drive circuit 101 and peripheral hardware control circuit 10 Control signal.
Be connected with two trigger switch S1, S2 on the central controller 7, the trigger switch S2 of one of them An end ground connection; Trigger switch S1 is triggered, central controller 7 work, and trigger switch S2 quilt Trigger, central controller 7 quits work.
The circuits plate places shell 60, operate outside state detection circuit 4 reception water pumps 70 Working state signal I9, i.e. the open and-shut mode of water pump 70, peripheral hardware control circuit 10 control water pumps 70 Open and-shut mode, water pump 70 communicates with tank 30 pipelines by water pipe 50.
At first, as shown in Figure 1, power supply P can be 50 hertz of 220V alternating currents, behind the K that closes a switch, Power circuit 3 work produce suitable low tension for corresponding each work, can produce through shaping circuit 1 Give birth to 50 hertz of 20V rectangle ac pulse voltages; Whole work operation is under the coordination of 1 kilo hertz of clock Carry out, the generation of clock is that NE555 forms the pulse that oscillating circuit 8 produces 1 kilo hertz, advances then Enter shaping pulse frequency dividing circuit 9 (CC4622B) and produce 1 kilo hertz, 0.01 kilo hertz double-frequency synchronous pulse letter Number, 1 kilo hertz pulse makes this control as the clock level signal of central controller 7 each functional module Device is normal operation in regular turn, 0.01 kilo hertz of synchronized sampling Pulse Electric as sensor probe electrode 301 Flat signal.
As shown in Figure 4, be lower than the sensing that is connected on the level sensor line I1 when the horizontal plane in the tank 30 During device probe electrode 301 bottom, be connected in the sensor probe electrode on the level sensor line In of ground connection 301 and be connected between the sensor probe electrode 301 on the level sensor line I1 and do not have sense current, establish Show that tank 30 middle water levels are low this moment, needs water-filling, and corresponding signal is through water level detection circuit 2 (CD40109, CD4013) reach signal isolation mode/number conversion circuit 5 (CC4016, CC4023, CC4027), central controller 7 (CD4031, CD4032, LM339, LM393) is according to operate outside The working state signal I9 of the water pump 70 that state detection circuit 4 receives is such as the operate outside state-detection Circuit 4 shows that water pump 70 cuts out this moment, then through the logical operation of central controller 7, judge and process, Open water pump 70 to tank 30 water-fillings, be charged to one set the period after, central controller 7 triggers peripheral hardwares Protection and drive circuit 101 (CC40107) make peripheral hardware control circuit 10 again switch off the pump 70, and The duty of water pump 70 is reached operate outside state detection circuit 4; If be connected in the water level of ground connection Sensor probe electrode 301 on the sense line In is visited with the sensor that is connected on the level sensor line I1 Between the tip electrode 301 sense current is arranged, showing in the tank 30 has water, then switches off the pump 70 or make water Pump 70 keeps cutting out.
Like this, present embodiment can be controlled feedwater automatically, realizes intelligent automatic control procedure.
Embodiment 2:
According to Fig. 2 and Fig. 5, the difference of present embodiment and a upper embodiment is, shaping circuit 1 and other A water level detection circuit 21 links to each other, and water level detection circuit 21 is connected with the level sensor line In of a ground connection And two level sensor line I5, I6, the level sensor line In of this ground connection and level sensor line I5, I6 The upper sensor probe electrode 301 that is connected with respectively places cistern 80, and the water level that is connected in this ground connection passes The sensor probe electrode 301 of sense line In places relative lowest part, is connected in level sensor line I6's Sensor probe electrode 301 places relative highest point, and water pump 70 draws water from cistern 80; Outside Working state checking circuit 4 receives the working state signal I9 of water pump 70, i.e. the switching shape of water pump 70 Attitude, also receive water pump 70 whether sky take out status signal I10, motor 701 whether superheat state signal I11, Whether motor 701 non-full-phase state signal I12; Oscillating circuit 8 also connects a warning drive circuit 61, Warning drive circuit 61 links to each other with warning circuit 6 (EL961, D382), turns to through signal isolation mode/number Change the analog-to-digital conversion of circuit 5 to the corresponding data signal of central controller 7 outputs, through center-control The processing of device 7 is also sent corresponding control signal to warning drive circuit 61 and warning circuit 6 simultaneously; Warning circuit 6 connects loudspeaker 20, and during warning, loudspeaker 20 is sounded; Peripheral hardware control circuit 10 Link to each other with water pump 70 and motor 701 and control its relevant work state.
Such as Fig. 5, the level sensor line In that inserts the ground connection in the cistern 80 places relative lowest part, water Position sense line I6 places relative highest point, is connected in the sensor on the level sensor line In of this ground connection Probe electrode 301 and be connected between the sensor probe electrode 301 on the level sensor line I6 if biography is arranged Inducing current, then should show still has water in the cistern 80, but in actual use, because cistern 80 In water level fluctuation, if horizontal plane just is in the sensor probe electrode that is connected on the level sensor line I6 301 bottom, water level fluctuation so that the sensor that is connected on the level sensor line In of this ground connection visit Tip electrode 301 and be connected in sensing electricity between the sensor probe electrode 301 on the level sensor line I6 Stream is detected as may to cut in and out, and affects the job stability of system; In aforesaid water level fluctuation feelings In the condition, be connected in the sensor probe electrode 301 on the level sensor line In of this ground connection and be connected in water Between the sensor probe electrode 301 on the sense line I5 of position stable sense current is arranged, can be shown as and hold Water is still arranged, if record continuously the level sensor that is connected in this ground connection in an effective time in the section in the pond 80 Sensor probe electrode 301 on the line In and the sensor probe electricity that is connected on the level sensor line I6 Do not have sense current between the utmost point 301, then can judge to be shown as in the pond 80 anhydrously, make water pump 70 work Or the maintenance duty, so just improved the job stability of system.
Such as Fig. 2 and Fig. 5, be that sky is taken out state if operate outside state detection circuit 4 receives water pump 70 Signal 110, motor 701 be superheat state signal I11 or motor 701 be non-full-phase state signal I12 it For the moment, operate outside state detection circuit 4 can send an interrupt requests to central controller 7 immediately Signal, central controller 7 is by peripheral hardware protection and drive circuit 101 (CC40107) and peripheral hardware control Circuit 10 stops operating motor 701 and water pump 70 immediately, and demonstrate corresponding fault or Failure cause; Simultaneously, central controller 7 sends corresponding to warning drive circuit 61 and warning circuit 6 Alarm control signal, loudspeaker 20 is sounded, the sound that sends for different fault-signals Can be different.
Like this, present embodiment can be controlled feedwater automatically, and can immediately reflect the system failure, by Relevant fault shows and fault alarm, helps the care and maintenance of system.
Embodiment 3:
According to Fig. 3 and Fig. 6, present embodiment comprises a power circuit 3, power circuit 3 and shaping circuit 1, signal isolation mode/number conversion circuit 5, central controller 7 and peripheral hardware control circuit 10 link to each other, and carry For corresponding working power; Shaping circuit 1 and an operate outside state detection circuit 4 and a water Position testing circuit 2 links to each other, and water level detection circuit 2 connects the level sensor line In of a ground connection and four Level sensor line I1, I2, I3, I4, the level sensor line In of ground connection and level sensor line I1, I2, Be connected with respectively sensor probe electrode 301 on I3, the I4, water level detection circuit 2 receives from sensor Sense current between the probe electrode 301, operate outside state detection circuit 4 receives the worker of water pump 70 Make status signal I9, namely the open and-shut mode of water pump 70, boiler 90 whether non-full-phase state signal I13, Whether boiler 90 power supplys disconnected safety position signal I14, and with signal isolation mode/number conversion circuit 5, arteries and veins Rushing plastic sub-frequency circuit 9 links to each other; One oscillating circuit 8 and peripheral hardware protection and drive circuit 101, pulse are whole Shape frequency dividing circuit 9 links to each other, and peripheral hardware protection and drive circuit 101 link to each other with peripheral hardware control circuit 10, and be outer If control circuit 10 links to each other with water pump 70 and boiler 90 and controls its relevant work state, shaping pulse Frequency dividing circuit 9 links to each other with central controller 7; Water level detection circuit 2 and operate outside state-detection electricity Road 4 is to signal isolation mode/number conversion circuit 5 outputting analog signals, through signal isolation mode/number conversion The analog-to-digital conversion of circuit 5 is to the corresponding data signal of central controller 7 outputs, through central controller 7 Processing send corresponding control letter to peripheral hardware protection and drive circuit 101 and peripheral hardware control circuit 10 Number; Oscillating circuit 8 also connects a warning drive circuit 61, warning drive circuit 61 and warning circuit 6 Link to each other, corresponding to central controller 7 outputs through the analog-to-digital conversion of signal isolation mode/number conversion circuit 5 Data signal, through the processing of central controller 7 simultaneously also to warning drive circuit 61 and the electricity of reporting to the police Corresponding control signal is sent on road 6; Warning circuit 6 connects loudspeaker 20, during warning, and loudspeaker 20 Sound.
Be connected with two trigger switch S1, S2 on the central controller 7, the trigger switch S2 of one of them An end ground connection; Trigger switch S1 is triggered, central controller 7 work, and trigger switch S2 quilt Trigger, central controller 7 quits work.
The circuits plate places shell 60, the open and-shut mode of peripheral hardware control circuit 10 control water pumps 70 And the open and-shut mode of boiler 90, water pump 70 communicates with boiler 90 pipelines by water pipe 50.
At first, as shown in Figure 3, power supply P can be 50 hertz of 220V alternating currents, behind the K that closes a switch, Power circuit 3 work produce suitable low tension for corresponding each work, can produce through shaping circuit 1 Give birth to 50 hertz of 20V rectangle ac pulse voltages; Whole work operation is under the coordination of 1 kilo hertz of clock Carry out, the generation of clock is that NE555 forms the pulse that oscillating circuit 8 produces 1 kilo hertz, advances then Enter shaping pulse frequency dividing circuit 9 (CC4622B) and produce 1 kilo hertz, 0.01 kilo hertz double-frequency synchronous pulse letter Number, 1 kilo hertz pulse makes this control as the clock level signal of central controller 7 each functional module Device is normal operation in regular turn, 0.01 kilo hertz of synchronized sampling Pulse Electric as sensor probe electrode 301 Flat signal.
As shown in Figure 6: the level sensor line In that inserts the ground connection in the boiler 90 places relative lowest part, Level sensor line I4 places relative highest point, the position of sensor probe electrode 301 in boiler 90 Order from low to high is followed successively by the sensor probe electrode on the level sensor line In that is connected in this ground connection 301, be connected in sensor probe electrode 301 on the level sensor line I1, be connected in level sensor line I2 On sensor probe electrode 301, be connected in sensor probe electrode 301 on the level sensor line I3, Be connected in the sensor probe electrode 301 on the level sensor line I4.
When the horizontal plane in the boiler 90 is lower than the sensor probe electrode that is connected on the level sensor line I2 301 and when being higher than sensor probe electrode 301 bottom that is connected on the level sensor line I1, be connected in Sensor probe electrode 301 on the level sensor line In of ground connection be connected on the level sensor line I2 Sensor probe electrode 301 between do not have sense current, the water level in the boiler 90 is low, needs water-filling.
When the horizontal plane in the boiler 90 is lower than the sensor probe electrode that is connected on the level sensor line I1 During 301 bottom, be connected on the level sensor line In of ground connection sensor probe electrode 301 be connected Between the sensor probe electrode 301 on the level sensor line I1, do not have sense current, show boiler this moment 90 middle water levels are ultralow.
When the horizontal plane in the boiler 90 is higher than the sensor probe electrode that is connected on the level sensor line I3 301 but when being lower than sensor probe electrode 301 bottom that is connected on the level sensor line I4, be connected in Sensor probe electrode 301 on the level sensor line In of ground connection be connected on the level sensor line I3 Sensor probe electrode 301 between sense current is arranged, this moment show that boiler 90 middle water levels are full.
When the horizontal plane in the boiler 90 is higher than the sensor probe electrode that is connected on the level sensor line I4 During 301 bottom, be connected on the level sensor line In of ground connection sensor probe electrode 301 be connected Between the sensor probe electrode 301 on the level sensor line I4, sense current is arranged, show boiler this moment 90 middle water level superelevation.
Corresponding signal through water level detection circuit 2 (CD40109, CD4013) reach the signal isolation mode/ Number conversion circuit 5, central controller 7 (CD4031, CD4032, LM339, LM393) is according to the outside Whether the working state signal I9 of the water pump 70 that Working state checking circuit 4 receives, boiler 90 lack Whether phase status signal I13, boiler 90 power supplys disconnected safety position signal I14, such as the operate outside state Testing circuit shows that boiler 90 is that non-full-phase state signal I13, boiler 90 power supplys are disconnected insurance shapes 4 this moments Attitude signal I14, perhaps boiler 90 middle water levels ultralow (height), operate outside state detection circuit 4 can be vertical Namely send an interrupt request singal to central controller 7, central controller 7 reaches by the peripheral hardware protection Drive circuit 101 (CC40107) and peripheral hardware control circuit 10 make operating motor 701 and water pump 70 Stop immediately, and demonstrate corresponding fault or failure cause; Simultaneously, central controller 7 is to warning Drive circuit 61 and warning circuit 6 send corresponding alarm control signal, and loudspeaker 20 is sounded, Can be different for the sound that different fault-signals sends.
Water level in boiler 90 is low, needs water-filling, then through logical operation, the judgement of central controller 7 Process, open water pump 70 to boiler 90 water-fillings, be charged on the level sensor line In that is connected in ground connection Sensor probe electrode 301 and being connected between the sensor probe electrode 301 on the level sensor line I3 Sense current is arranged, and show that boiler 90 middle water levels are full this moment, and central controller 7 triggers the peripheral hardware protection and reaches Drive circuit 101 (CC40107) makes peripheral hardware control circuit 10 switch off the pump 70, and with water pump 70 Working state signal I9 reach operate outside state detection circuit 4.
In the present embodiment, present embodiment is applied to ask higher as boiler 90 is this for real-time control height Occasion, same, the present invention also can be applicable to reservoir level monitoring flood control flood control and other plumbing Occasion has demonstrated fully the advantage of the present invention aspect Function Extension, and the present invention can realize intellectuality Automatic control process.
Claims (6)
1. electrode type digital liquid level controlling device, comprise a power circuit, it is characterized in that: power circuit (3) links to each other with shaping circuit (1), Signal Spacing mould/number conversion circuit (5), central controller (7) and peripheral hardware control circuit (10), and the corresponding work power supply is provided; Shaping circuit (1) links to each other with an operate outside state detection circuit (4) and at least one water level detection circuit (2), the level sensor line (In) that water level detection circuit (2) connects a ground connection reaches another root level sensor line (I1) at least, be connected with sensor probe electrode (301) respectively on the level sensor line (In) of ground connection and the level sensor line (I1), water level detection circuit (2) receives from the sense current between the sensor probe electrode (301), operate outside state detection circuit (4) receives an external unit working state signal (I9) at least, and with Signal Spacing mould/number conversion circuit (5), shaping pulse frequency dividing circuit (9) links to each other; Protection of one oscillatory circuit (8) and peripheral hardware and driving circuit (101), shaping pulse frequency dividing circuit (9) link to each other, peripheral hardware protection and driving circuit (101) link to each other with peripheral hardware control circuit (10), peripheral hardware control circuit (10) links to each other with at least one external unit and controls its duty, and shaping pulse frequency dividing circuit (9) links to each other with central controller (7); Water level detection circuit (2) and operate outside state detection circuit (4) are to Signal Spacing mould/number conversion circuit (5) output simulating signal; to central controller (7) output digital signal corresponding, send control signal corresponding to peripheral hardware protection and driving circuit (101) and peripheral hardware control circuit (10) through the analog to digital conversion of Signal Spacing mould/number conversion circuit (5) through the processing of central controller (7).
2. electrode type digital liquid level controlling device according to claim 1, it is characterized in that: described oscillatory circuit (8) also connects a warning driving circuit (61), warning driving circuit (61) links to each other with warning circuit (6), analog to digital conversion through Signal Spacing mould/number conversion circuit (5) is exported digital signal corresponding to central controller (7), also sends control signal corresponding to warning driving circuit (61) and warning circuit (6) simultaneously through the processing of central controller (7).
3. electrode type digital liquid level controlling device according to claim 2 is characterized in that: described warning circuit (6) can connect loudspeaker (20).
4. electrode type digital liquid level controlling device according to claim 1 and 2 is characterized in that: be connected with two trigger switches (S1), (S2) on the described central controller (7), an end ground connection of the trigger switch of one of them (S2); Trigger switch (S1) is triggered, central controller (7) work, and trigger switch (S2) is triggered, central controller (7) quits work.
5. electrode type digital liquid level controlling device according to claim 1 is characterized in that: described shaping circuit (1) produces ac pulse voltage.
6. electrode type digital liquid level controlling device according to claim 1 is characterized in that: described sensor probe electrode (301) adopts stainless steel to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01114576 CN1339728A (en) | 2001-07-08 | 2001-07-08 | Electrode type digital liquid level controlling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01114576 CN1339728A (en) | 2001-07-08 | 2001-07-08 | Electrode type digital liquid level controlling device |
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| Publication Number | Publication Date |
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| CN1339728A true CN1339728A (en) | 2002-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 01114576 Pending CN1339728A (en) | 2001-07-08 | 2001-07-08 | Electrode type digital liquid level controlling device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011140965A1 (en) * | 2010-05-08 | 2011-11-17 | Wang Xiuquan | Oil and water collecting-discharging device for range hood |
| WO2012048471A1 (en) * | 2010-10-15 | 2012-04-19 | 惠州市卓耐普智能技术有限公司 | Digital field-induction water-level intelligent sensing system and its implementation method |
| CN102609010A (en) * | 2012-03-28 | 2012-07-25 | 彭勇 | Power supply for remotely transmitting signals of liquid level controller by electric water pump |
| CN103267874A (en) * | 2013-05-15 | 2013-08-28 | 复旦大学 | Liquid level automatic control system of atomic force microscope liquid phase imaging |
| CN103434001A (en) * | 2013-08-13 | 2013-12-11 | 贵州博典建材化工科技有限公司 | Material level automatic regulating device for foam slurry |
| WO2016119144A1 (en) * | 2015-01-28 | 2016-08-04 | 惠州市吉瑞科技有限公司 | Device for detecting tobacco oil surplus of electronic cigarette, electronic cigarette, and electronic cigarette control method |
-
2001
- 2001-07-08 CN CN 01114576 patent/CN1339728A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011140965A1 (en) * | 2010-05-08 | 2011-11-17 | Wang Xiuquan | Oil and water collecting-discharging device for range hood |
| CN102713446A (en) * | 2010-05-08 | 2012-10-03 | 王秀全 | Oil and water collecting-discharging device for range hood |
| WO2012048471A1 (en) * | 2010-10-15 | 2012-04-19 | 惠州市卓耐普智能技术有限公司 | Digital field-induction water-level intelligent sensing system and its implementation method |
| CN102713534A (en) * | 2010-10-15 | 2012-10-03 | 惠州市卓耐普智能技术有限公司 | Digital field-induction water-level intelligent sensing system and its implementation method |
| CN102713534B (en) * | 2010-10-15 | 2013-11-20 | 惠州市卓耐普智能技术有限公司 | Digital field-induction water-level intelligent sensing system and implementation method thereof |
| CN102609010A (en) * | 2012-03-28 | 2012-07-25 | 彭勇 | Power supply for remotely transmitting signals of liquid level controller by electric water pump |
| CN103267874A (en) * | 2013-05-15 | 2013-08-28 | 复旦大学 | Liquid level automatic control system of atomic force microscope liquid phase imaging |
| CN103267874B (en) * | 2013-05-15 | 2015-12-09 | 复旦大学 | The automatic control system for liquid level of atomic force microscope liquid phase imaging |
| CN103434001A (en) * | 2013-08-13 | 2013-12-11 | 贵州博典建材化工科技有限公司 | Material level automatic regulating device for foam slurry |
| WO2016119144A1 (en) * | 2015-01-28 | 2016-08-04 | 惠州市吉瑞科技有限公司 | Device for detecting tobacco oil surplus of electronic cigarette, electronic cigarette, and electronic cigarette control method |
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