CN1217165C - Digital indexing type water level sensor - Google Patents
Digital indexing type water level sensor Download PDFInfo
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- CN1217165C CN1217165C CN 200310109631 CN200310109631A CN1217165C CN 1217165 C CN1217165 C CN 1217165C CN 200310109631 CN200310109631 CN 200310109631 CN 200310109631 A CN200310109631 A CN 200310109631A CN 1217165 C CN1217165 C CN 1217165C
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Abstract
The present invention relates to a digital indexing type water level sensor, which belongs to the technical field of the automatic detection. More specifically, the present invention relates to a sensor for the water level detection. The present invention is characterized in that the sensor is a three-section solid circular bar type sensor which is composed of three sections of A, B and C and is formed by casting an internal circuit and a plasticity insulation material, wherein a plurality of sensing elements are used for the indexing type digital signal sampling operation of water position points; a microprocessor carries out the data statistics, and simultaneously, an RS-485 interface meeting the international standard outputs signals. The whole digitalization of the signal sampling, processing and transmitting operation is realized, and simultaneously, the present invention thoroughly avoids the unstable and unreliable factor that the analog quantity detection is interfered by the temperature, the electromagnetic field, etc. The present invention can be directly combined with equipment of a digitization system in the process of the industrial liquid level and water level automatic measurement and control. The present invention has the advantages of simple structure, stable and reliable performance, convenient installation and maintenance, etc.
Description
Technical field
Numerical search formula level sensor of the present invention belongs to the test technique automatic field, particularly is a kind of sensor that is used for water level detecting.
Technical background
Technology and the product that adopts aspect water level detecting both at home and abroad is many at present, concludes for following several:
1, ultrasonic sensor.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 CN 86 1 05681A.
3, condenser type water [thing] level sensor: be new product, the 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 several families.
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.Its advantage is easy to install, and strong signal is convenient to carry, so and cost low/adapt to wide.Its shortcoming is can not the continuous coverage water level, and it relies on the ball float that is through on the steel pipe to do mechanical motion up and down, occur easily foreign material stop up the error of getting stuck, particularly in the water that flows, friction increase between upstream and downstream hydraulic pressure official post ball float and steel pipe, formation is got stuck.In engineering is used, need shaft building, construction costs is significantly improved.As Chinese patent " float type level meter ", publication number CN 86 1 07944 A.
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 must leave between electrode size and the electrode certain interval and restricts, and measuring accuracy is restricted.As Chinese patent " water level color changing display " notification number CN2183556Y, it only be applicable to occasions such as small container or static cistern, water tower, header tank use (as patent: CN2212775Y, CN2072677U, CN2045479U).The form of the composition by this 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, poor practicability.(as patent: notification number CN2183556Y, CN2212775Y is among the 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.
Summary of the invention
The objective of the invention is to:
1, solves the indeterminable problem of prior art, as the extensive adaptability of using under sensor stability, reliability and the mal-condition.
2, enlarge the scope of application, solve installation, use, problem easy to maintenance.Make it to adapt to and satisfy various service conditions.As water level monitorings such as deep-well, tunnel, sewer, underground pipelines.
3, reduce cost, provide a kind of simple in structure, adaptable, but the universal universal level sensor of Direct Sampling.
Numerical search formula level sensor of the present invention, but be a kind of sensor of water level signal Direct Digital sampling, it is characterized in that it being a kind of by A, B, what C three joints were formed realizes the sensor that the numerical search formula is taken a sample to water level point, by function A, B, C three joints patch composition, patching the position is that full waterproof patches, its circuit chip partly, make its skeleton and assemble related circuit with dielectric panel by each joint function, assembling constant voltage circuit (11) in the first segment A, dormancy formula feed circuit (12), microprocessor, clock circuit (10), lead terminal (9) and operating sensor software copy debugging part, assembling search circuit (14) in the second joint B, testing circuit (16), sensing unit's electrode (6) and sensor chip circuit board (8), be fixed in the sensing of making by resistant material unit's electrode (6) on the support frame back side and be spaced apart 1 centimetre or by the request for utilization manufacturing, the installation and measuring signal sends unit (13) in the 3rd joint C, press A at last respectively, B, C three joints, after the insulating material casting, become a round bar type sensor of solid.
This sensor characteristics mainly is two aspects, is sensor circuit on the one hand, is its special structure on the other hand.Its sensor circuit is by several sensing unit circuit the water level pointwise to be realized the digitized signal sampling, is made of microprocessor and software detection program.Data pointwise retrieval, statistics, numeral become functions (seeing circuit theory diagrams Fig. 4 for details) such as sending, export digital signal.Its sensor construction is that it is to be patched by three pitch circle shape barred bodies to connect and compose (seeing sensor construction figure one, figure two, figure three for details).The function of first segment is a signal transmitting and retrieval control, and the second joint function is the retrieval testing circuit, and the 3rd joint function is that signal sends, and the circuit board in every joint all is to place on the support frame that two rows are arranged, and support frame is made with insulating material.Be fixed with some sensor core circuit boards below the support frame, be fixed with sensing unit electrode above the support frame, be spaced apart between the sensing unit electrode 1 centimetre (or by request for utilization manufacturing), sensor chip circuit board and lead terminal, signal element, shell become a solid bar type sensor after casting with insulating material.
The preparation method of above-mentioned numerical search formula level sensor, it is characterized in that preparation is divided into two parts and carries out, a part is the preparation of circuit chip, another part is the preparation of structural housing, the preparation partly of its circuit chip, at first select for use dielectric panel to make its skeleton and by each joint function assembling related circuit, assembling constant voltage circuit (11) in the first segment, dormancy formula feed circuit (12), microprocessor, clock circuit (10), lead terminal (9) and the debugging of operating sensor software copy, assembling search circuit (14) in second joint, testing circuit (16) is also installed sensing unit electrode (6), the installation and measuring signal sends unit (13) in the 3rd joint, be fixed in sensing unit electrode (6) on the sensor core crab back side and be spaced apart 1 centimetre or can be according to the request for utilization setting, sensing unit's electrode (6) is made by resistant material, at last the sensor core of making is put into mould, be cast into solid-state square or circular bar type sensor with the plasticity insulating material.
The preparation method of above-mentioned numerical search formula level sensor, it is characterized in that, described chip skeleton uses the dielectric panel consistent with mould material to make, sensing unit's electrode (6) is by non magnetic, corrosion resistant, conductor material is made, lead terminal (9) is made with plastics and epoxy resin or other insulating material, waterproof three core electrical connectors with totally-enclosed ability, chip and shell become a solid-state entity after casting, its cross section is 40 millimeters of diameters, length can be designed to 50-80 centimetre at every joint as the case may be, its sensor moulding, pouring technology, extrusion process and equipment are with designing the also specialized equipment of consigned processing voluntarily.
The use of above-mentioned numerical search formula level sensor is characterized in that:
The first, this sensor signal is output as the RS-485 interface of international standard, can directly integrate with computing machine and digitizer instruments and meters thereof.Numerical search formula level sensor is made up of three parts, and the function of first is signal transmitting and retrieval control.With sensor interface technology difference in the past, the retrieval control system of this sensor is given the signal transmitting device with the digital signal transfers that collects, just can be directly be connected with general RS-485 through the conversion of digital signal transmitter.
The second, easy to install: as to be determined that by principle of sensors this sensor does not have special requirement to the infield condition, need not to build well logging or other auxiliary equipment.The free vertical fixing of sensor is installed in the range of stage scope and can uses.For the gamut that satisfies in the range of stage scope uses, the B joint of sensor, but more piece patches use (can patch into tens meters long to tens meters), can not satisfy on the same point under the vertically arranged situation (as river shoal, seabeach, reservoir bank as mounting condition, need not perpendicular overhead fixed installation), can implement by absolute altitude segmentation, merogenesis, the staged multiple spot is installed, and can realize that equally continuous monitoring metering order gets.
Three, but the signal teletransmission can be built the unattended duty measuring station: the sensor signal extension line is specified can directly carry three kilometers, and maximum can arrive 20 kilometers, thus can not build the monitoring station in the monitoring point, but signal direct sending relay station.Can realize the omnidistance unmanned in monitoring station.
The main application and the advantage of invention
1, purposes: be used for the water level robotization control of industrial and mining enterprises.Be used for industrial and mining enterprises and water resources managements such as mine, metallurgy, building materials, electric power, chemical industry, the robotization that the hydrology observes and predicts detects control.
2, it is strong that advantage: a, signal have an antijamming capability, is not subjected to temperature, electric wave electric field etc., environmental influence.
B, measuring error are little, reliable and stable.
C, full throw-in type have the silt of not being afraid of dirt and are not afraid of dust and stop up and bury.
D, installation, use, easy to maintenance.Not limited by mounting condition.
Description of drawings
The structural drawing of Fig. 1 numerical search formula level sensor.
The interior chip front view (FV) of Fig. 2 numerical search formula level sensor
Fig. 3 is a numerical search formula level sensor sectional view
Fig. 4 is a numerical search formula level sensor schematic diagram.
1, sensors A joint 2, sensor B joint
3, sensor C saves 4, patches connecting screw
5, circuit core body skeleton 6, respond to first electrode
7, insulating material cast material 8, circuit board
9, water seal lead-in wire connector 10, become give, clock, CPU, search instruction circuit
11, constant voltage circuit 12,5V dormancy formula feed circuit
13, signal sends unit 14, search circuit
15, gating circuit 16, sample circuit
Embodiment:
Numerical search formula level sensor structure:
The sensors A joint: diameter 40mm, length is 120 millimeters.Be assembled with on the inner frame become give, clock, CPU, search instruction circuit and constant voltage circuit plate, 5V dormancy formula feed circuit.
Sensor B joint: diameter 40mm, length is 640 millimeters.Be assembled with search circuit, gating circuit, sample circuit plate and 64 first electrodes of induction on the inner frame.
Sensor C joint: be diameter 40mm, length is 50 millimeters nickel-chrome body.This sensor chip skeleton is made with epoxy resin board, by each economize on electricity road assembling and setting good after, put into mould, casting with epoxy resin forms.(chip and shell become an entity after casting)
Lead terminal usefulness is the plug-in type lead terminal that has water seal of design voluntarily, and (this connector need not to do other water-proofing treatment after patching fastening getting well.
Claims (1)
- A kind of numerical search formula level sensor, it is characterized in that it being a kind of by A, B, what C three joints were formed realizes the sensor that the numerical search formula is taken a sample to water level point, by function A, B, C three joints patch composition, patching the position is that full waterproof patches, its circuit chip partly, make its skeleton and assemble related circuit with dielectric panel by each joint function, assembling constant voltage circuit (11) in the first segment A, dormancy formula feed circuit (12), microprocessor, clock circuit (10), lead terminal (9) and operating sensor software copy debugging part, assembling search circuit (14) in the second joint B, testing circuit (16), sensing unit's electrode (6) and sensor chip circuit board (8), be fixed in the sensing of making by resistant material unit's electrode (6) on the support frame back side and be spaced apart 1 centimetre or by the request for utilization manufacturing, the installation and measuring signal sends unit (13) in the 3rd joint C, press A at last respectively, B, C three joints, after the insulating material casting, become a round bar type sensor of solid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310109631 CN1217165C (en) | 2003-10-31 | 2003-10-31 | Digital indexing type water level sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310109631 CN1217165C (en) | 2003-10-31 | 2003-10-31 | Digital indexing type water level sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1540295A CN1540295A (en) | 2004-10-27 |
| CN1217165C true CN1217165C (en) | 2005-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310109631 Expired - Fee Related CN1217165C (en) | 2003-10-31 | 2003-10-31 | Digital indexing type water level sensor |
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| Country | Link |
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| CN (1) | CN1217165C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105136236A (en) * | 2015-08-19 | 2015-12-09 | 张萍 | Water level monitoring system based on Internet of things for water conservancy and hydropower engineering |
| CN107203226B (en) * | 2017-06-20 | 2023-08-11 | 熊佳富 | Three-ring solid-state probe for detecting water level of urban pipe gallery sump |
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2003
- 2003-10-31 CN CN 200310109631 patent/CN1217165C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1540295A (en) | 2004-10-27 |
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