CN1045018C - Induction type digital water level sensor - Google Patents
Induction type digital water level sensor Download PDFInfo
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- CN1045018C CN1045018C CN 96110735 CN96110735A CN1045018C CN 1045018 C CN1045018 C CN 1045018C CN 96110735 CN96110735 CN 96110735 CN 96110735 A CN96110735 A CN 96110735A CN 1045018 C CN1045018 C CN 1045018C
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Abstract
The present invention relates to an induction type digital water level sensor, particularly to a sensor for monitoring the water level. Each induction neuron circuit is composed of a group of reverse phase comparison type triggers and an induction electrode in the sensor. Moreover, each induction neuron circuit outputs digital signals in a switching pulse way. The sensor is provided with a stepwise excitation power supply. The present invention has the advantages of digital signal remote transmission property, convenient installation, use and maintenance, simple structure and low manufacturing cost. The present invention can be used under any conditions. The present invention has a key point that the present invention solves the problem of the remote monitoring operation.
Description
The invention belongs to technical field of automatic control, particularly is a kind of sensor that is used for water level and conductive liquid level detection.
Technology and the product that adopts aspect water level monitoring both at home and abroad is many at present, concludes for following several:
1, ultrasonic detector.This series products mainly is suitable for the water-level detecting in broad waters.Instrument is installed in the top away from the water surface, transmits and receives electromagnetic wave to the water surface, and measures electromagnetic reflection wavelength, cycle, measures the distance of the water surface apart from instrument, thereby measures water level.This type of production producer is all arranged at present both at home and abroad.As Chinese patent " the self-adapting ultrasonic liquid level instrument " patent No. 932031064.
2, differential level sensor: along with development of semiconductor, the semiconductor surface diffusion technique has obtained widespread use in the making of sensor balanced bridge.The diffuse si differential pressure pickup is a pressure principle of utilizing water, detects the pressure reduction of water-bed pressure and standard atmospheric pressure under the bottom.It is to make semiconductor diffuse si film produce the piezoelectric effect of deformation by water-bed pressure, and obtains water level signal.This type of production producer is all arranged at present both at home and abroad.As Chinese patent " differential manometer " publication number CN86105681A.
3, condenser type water [thing] level sensor: be new product, the new technology that occurred in recent years, it relies on capacitance principle and makes.Electric capacity is made of two-plate and medium, changes medium and will change electric capacity.Water is as the medium of electric capacity, and water logging there is not sensor many more, and the also many more electric capacitys of medium filling are big more.By detecting the size of electric capacity, come sensed water level.Mainly produce the present domestic manufacturer production that also has by West Germany, Japan, Canadian youngster family.
Though more than several sensor technology comparative maturities owing to be subjected to the restriction of service condition aspect, or price is too expensive, makes their usable range be subjected to very big limitation.Can only under the mounting condition of spaciousness, use such as ultrasonic detector, differential level sensor can only use in the water of clean nothing dirt, capacitance type sensor costs an arm and a leg, and their common characteristic is that signal can not long-distance transmissions, makes their use be subjected to very big limitation.What use was maximum during present water level in Industry Control or civilian cause was monitored is the float-type level sensor.
4, float-type level sensor: it is the simplest a kind of level sensor, and it is made up of a stainless-steel tube and a stainless steel hollow ball.Four dry-reed relays are housed in the stainless-steel tube, a permanent magnet is housed in the hollow ball, when hollow ball moved up and down along with water level, magnet acted on relay.Whole float-type level sensor is equivalent to four fixed point water level switches, with these four water level switches hydrodynamic apparatus is controlled.Another kind is to hang ball float with wire rope one end on pulley blocks, and the other end is hung weight.Its shortcoming is exist to slide between wire rope and the pulley, the problem that the return error ratio is bigger, and particularly under the situation that wire rope and pulley get rusty, the return error strengthens, even loses efficacy.And, in using, engineering needs to build well logging, and construction costs is significantly improved.As Chinese patent " float type level meter ", publication number CN86107944A.
5, DC electrode formula level sensor: belong to the assembly type sensor, the sensor of this form, it detects principle is conductive characteristic according to water, when electrode forms DC current or voltage when contact with water, directly or through the ball bearing made using of a resistance and a triode composition.Signal is passed to subsequent process circuit with lead (a bit to multi-thread output of a line or two lines output simple in parallel).Electrode is made with copper or stainless steel or other metal material, opens a water inlet on the excellent inherent rod at least by vertically being sequentially arranged in the sky mandrel outer or being installed in, and makes electrode can touch water; Because electrode is vertically arranged, and is subjected to have surface water adhesion problems between electrode between electrode size and the electrode, must leave the certain interval restriction, measuring point quantity and precision are restricted.As Chinese patent " water level color changing display " notification number CN2183556Y, it only is applicable to that the level monitoring of doing several points under the occasions such as small container or static cistern, water tower, header tank uses (as patent: CN2212775Y, CN2072677U, CN2045479U).The form of the composition by such sensor has determined all easily to be detained silt, incrustation scale and dirt with pipe table gap in its pipe, causes interpolar to connect easily, causes sensor failure.This sensor is that cost is carried out water level detecting with the sacrificial electrode, needs often maintenance or changes electrode, and it also is a kind of simple control type level sensor.Be difficult to adapt to the requirement that modernization project uses (as patent: be among the notification number CN2183556Y CN2212775Y CN2072677U some a line multiple spot is drawn signal).
Along with rapid development of science and technology, water level monitoring is not just used in large hydraulic engineering and the industry automatic control, and the elevated tank of high buildings and large mansions, water tower, urban groundwater road pipe network, underground tank well or the like all need the water level monitoring.All need new technology to solve the problem of current existence, drawing Huang, to go into the water level monitoring problem of Shanxi engineering be exactly an example of giving prominence to.Water level control in Industry Control and the civilian cause, in modern today still usefulness is ball float, float-type water level control mode.Suddenly need new, can satisfy the general water level supervising device that high-performance again can be widely applicable.Order of the present invention must be:
1, solves the indeterminable problem of prior art, stop up, bury, problem such as the remote transmission of signal as the silt dirt.
2, enlarge the scope of application, solve installation, use, problem easy to maintenance.Make it under any condition of water level monitoring, can both use.As water level monitorings such as deep-well, tunnel, Xia Shui, underground pipe trench.
3, reduce cost, provide a kind of simple, adaptable than ultrasound wave, sensor construction such as differential, but the universal universal level sensor of water level Direct Sampling.
Induction type level sensor of the present invention is according to imitative biological thinking, designs according to imitative neural network theory.If a people stands in the water, know that also water logging is less than that position of own health even close eyes.This is that each cell is equivalent to a sensor because human body is a mass of neurocyte, and numerous neurocyte have been formed neural network, neuralward maincenter (brain) mail message.Studies show that at present the information transmission between the biological nerve net mainly is to carry out with the form of electric pulse.Biological each sense organ neuron that passes through is sent into the cerebral nerve maincenter with external information through neural axis.Information after brain is handled is stretched to each effector by neural axis again, the various actions that domination is biological.
Induction type digital water level sensor of the present invention, but be a kind of sensor of water level signal direct sample.It is characterized in that a kind of according to imitative biology and neural networks principles and design, the airtight bar type sensor of forming by several induction type neuron circuits, this sensor is made up of two parts on the whole, a part is a circuit chip, another part is a shell, its chip skeleton is made with dielectric panel, the front of chip is fixed with some blocks of induction neuron circuit plates, every induction neuron circuit all is to be made of one group of anti-phase relatively D-flip flop and an induction electrode, each neuron circuit all is the form output digital signal with switching pulse, be fixed in the induction neuron circuit on the sensor chip skeleton front, it is spaced apart 2 centimetres, if the back side of chip is fixed with in the first electrode of individual induction, it also is 2 centimetres at interval, respond to first electrode and made by resistant material, shell forms with the casting of plasticity insulating material, and chip and shell become a solid-state entity after casting.Its diameter is generally the 20-50 millimeter, and length generally can be designed to 0.5-20 rice as the case may be, its lead terminal hydrolock lead terminal of design voluntarily.
Induction type digital water level sensor is characterized in that the most handy epoxy resin board of chip skeleton makes, and responds to first electrode and is preferably made by graphite, carbon or non-magnetic, corrosion resistant, conductor material, and plastic insulating material casting such as shell available epoxy, plastics forms.The hydrolock lead terminal is made with plastics and epoxy resin or other insulating material, has three core electrical connectors of water seal ability.
Induction type digital sensor sensor in use vertically is installed in the water, and corresponding neuron circuit sends signal to maincenter when water level changes up and down.Particularly be exactly, the water surface is during near certain intrinsic nerve unit circuit, and this circuit produces and triggers property upset, and output signal becomes " 0 " by " 1 ".Output signal is become by " 0 " that " 1 ', several neuron circuits have been formed a water level neural line when the water surface leaves intrinsic nerve unit circuit.Each piece neuron circuit all is to be made of one group of anti-phase relatively D-flip flop and an induction electrode.See schematic diagram for details.(Fig. 1) each neuron circuit all is the form output digital signal with switching pulse, passes through the D-A change-over circuit again, and switches digital is transformed into simulating signal output.Total effect of whole conversion is: with SEA LEVEL VARIATION from low to high, the current signal that is transformed into the 4-20 milliampere is exported from signal end.
Excitation power supply is the working power of sensor.Design is powered in 15-36 volt scope, at first by constant voltage circuit excitation power supply is carried out constant voltage and handles.Suspend to the induction type neuron circuit according to the water level situation by the stepping feed circuit then and power.Reduce loss in probe power and the signal conveys with this, further improve the teletransmission ability.
Sensor has different specifications, and its excellent diameter is the 20-50 millimeter.Length is 0.5-20 rice.This sensor mainly is made up of two parts, and a part is a circuit chip, and another part is a shell.[structure sees Fig. 2, Fig. 3, Fig. 4 for details]
The back side of chip is fixed with several and responds to first electrode 2.See structural drawing for details: Fig. 2.
Responding to first electrode is made by graphite, carbon or other non-magnetic corrosion resistant conductor material.
Shell forms with the casting of plasticity insulating material.Available Material has epoxy resin, plastics etc.[chip and shell become an entity after casting]
Lead terminal 4: with the plug-in type lead terminal that has water seal that designs voluntarily.This connector fasteningly need not to do other water-proofing treatment after good and can drop in the water entirely and use patching.The main application and the advantage of invention
1, purposes: be used for the water robotization control of industrial and mining enterprises.Be used for river, reservoir, head-tank, water tower, the water of drainage facilities such as underground tank, channel, urban sewage, pipe network is automatically-monitored.
2, advantage: a, signal have the teletransmission characteristic.Strong anti-interference performance.
B, measuring accuracy height, error is little, and is reliable and stable.
C, full throw-in type have the obstruction of the silt of not being afraid of dirt and bury, and do not have mechanical motion, do not have the problem of the error of getting stuck.
D, installation, use, easy to maintenance.Not limited by mounting condition, can under any condition, use.Eight, invention accompanying drawing: attached most preferred embodiment in addition: the level sensor that draws yellow engineering water level monitoring.
For the sensor that draws yellow engineering design directly through being 32 millimeters, length is 5 meters.Split is two joints, and this sensor chip skeleton 1 usefulness epoxy resin board is made.The front of chip is fixed with 14 circuit boards, is fixed with D1-D246 totally 246 induction neuron circuits.Each is spaced apart 2 centimetres, and other circuit block interts to be fixed on according to mounting condition to be responded between the neuron circuit plate.
The back side of chip is fixed with 246 first electrodes 2 of induction, sees structural drawing [Fig. 2] for details, responds to first electrode and is made by nickel-chrome, and it is spaced apart 2 centimetres.
The shell plastic tube, and the space between the chip forms chip with the epoxy resin casting and shell becomes an entity after casting.
Lead end is in the plug-in type lead terminal that has water seal of design voluntarily, and (this connector fasteningly need not to do other water-proofing treatment after good and can drop in the water entirely and use patching.
Description of drawings
Fig. 1; Circuit theory diagrams.
1, constant voltage circuit 5, reference voltage source circuit
2, step-by-step movement feed circuit 6, induction trigger switch digital circuit
3, D/A D/A converting circuit 7, sensing unit circuit
4, constant current output circuit
Fig. 2; Fig. 3; Fig. 4; Sensor construction figure.
Fig. 2: be the sensor chip front view (FV), Fig. 3: be the sensor chip back view.
Fig. 4; It is the sensor vertical view.
1, sensor chip skeleton 5, sensing sources electrode
2, sensing unit electrode 6, plasticity insulating material housing
3, sensing unit circuit board 7, filling insulating material material [epoxy resin casting]
4, hydrolock connection terminal 8, electric elements
Claims (2)
1, but a kind of induction type digital water level sensor of water level signal direct sample, it is characterized in that a kind of according to imitative biology and imitative neural networks principles and design, the bar type sensor of forming by several induction type neuron circuits, this sensor is made up of two parts on the whole, a part is a circuit chip, another part is a shell, its chip skeleton is made with dielectric panel, the front of chip is fixed with some blocks of induction neuron circuit plates, every induction neuron circuit all is to be made of one group of anti-phase relatively D-flip flop and an induction electrode, each neuron circuit all is the form output digital signal with switching pulse, be fixed in the induction neuron circuit on the sensor chip skeleton front, it is spaced apart 2 centimetres, the back side of chip is fixed with several and responds to first electrode, it also is 2 centimetres at interval, responding to first electrode is made by resistant material, shell forms with the casting of plasticity insulating material, chip and shell become an entity after casting, its diameter is the 20-50 millimeter, length is 0.5-20 rice, and its lead terminal is the hydrolock lead terminal.
2, according to the said induction type digital water level sensor of claim 1, it is characterized in that the chip skeleton makes with epoxy resin board, responding to first electrode is made by graphite, carbon or non-magnetic, corrosion resistant, conductor material, shell forms with plastic insulating material casting such as epoxy resin, plastics, the hydrolock lead terminal is made with plastics and epoxy resin or other insulating material, has three core electrical connectors of water seal ability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96110735 CN1045018C (en) | 1996-07-11 | 1996-07-11 | Induction type digital water level sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96110735 CN1045018C (en) | 1996-07-11 | 1996-07-11 | Induction type digital water level sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1152708A CN1152708A (en) | 1997-06-25 |
| CN1045018C true CN1045018C (en) | 1999-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96110735 Expired - Fee Related CN1045018C (en) | 1996-07-11 | 1996-07-11 | Induction type digital water level sensor |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102117079B (en) * | 2010-01-06 | 2014-02-26 | 李德强 | Automatic digital water level control warner |
| CN102323628B (en) * | 2011-09-07 | 2013-05-01 | 西安电子科技大学 | Rainfall information acquiring and metering method and unit, and rainfall meter |
| CN104535134B (en) * | 2014-12-29 | 2017-10-20 | 太原理工大学 | A kind of grade digital water level sensor detecting method |
| CN105241524B (en) * | 2015-10-26 | 2018-03-20 | 河海大学常州校区 | A kind of city flood warning system and method based on radial basis function neural network model |
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1996
- 1996-07-11 CN CN 96110735 patent/CN1045018C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1152708A (en) | 1997-06-25 |
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Owner name: TIANCHENG TECH CO., LTD., TAIYUAN SCIENCES & ENGI Free format text: FORMER OWNER: TAIYUAN INDUSTRY UNIVERSITY Effective date: 20010824 |
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Effective date of registration: 20010824 Address after: 16 floor, science building, No. 79 West Street, Taiyuan, Shanxi, Yingze Patentee after: Tiancheng Science and Technology Co., Ltd., Taiyuan Science and Engineering Univ Address before: No 11, West Avenue, Taiyuan, Shanxi, Yingze Patentee before: Taiyuan Polytechnic University |
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Granted publication date: 19990908 Termination date: 20100711 |