A kind of dedicated electronic sensor counting device of drinking water meterTechnical field
The utility model relates to a kind of drinking water meter number system more particularly to a kind of dedicated electronic sensors of drinking water meterCounting device.
Background technique
Present drinking water meter either mechanical water meter, intellectual water meter, IC card water meter, photoelectric direct-reading water meter, all useThe sensor-based system of mechanical drive mode.When i.e. water flow passes through, the kinetic energy of water flow pushes rotor wing rotation, and rotor is again with the finger of moving gearNeedle or character wheel counter show water consumption.But this sensor-based system can not give single-chip microcontroller to provide pulse signal, and existing intelligenceWater meter, IC card water meter, photoelectric direct-reading water meter, there are no the traditional modes for being detached from original mechanical water meter, only in the reading of water meterSensing element is installed in some of index or gear set positions, and mechanical reading is converted into electrical signal data, is then carried outAcquisition, operation, transmission.And the kind of drive still uses mechanical traditional approach.Due to using mechanical drive mechanism, waterIn small flow, the kinetic energy of water flow is difficult to overcome the inertia and resistance of water meter mechanical part table, to cause small flow without countingThe inaccurate phenomenon with metering.
In consideration of it, the designer tries to explore and studies in view of the deficiencies of the prior art, to found a kind of drinking water meterDedicated electronic sensor counting device.
Utility model content
For overcome the deficiencies in the prior art, the utility model aim is to provide a kind of dedicated electronic sensor of drinking water meterCounting device, the arrangement achieves electronic sensor tally controls, to improve the precision of water meter, extend water meter uses the longevityLife.
The utility model is adopted the technical scheme that reach above-mentioned technical purpose: a kind of dedicated electronics of drinking water meterCounting device, including watchcase are sensed, the watchcase is equipped with water inlet, inner cavity and water outlet；The water inlet is equipped with purificationMagnet, described interior intracavitary equipped with impeller, the impeller top is connected with radial magnet, is equipped with and counts above the radial magnetControl device, sets that there are two switching mode tunnel magneto-resistive sensor, described two switching mode tunnels magnetic in the count control deviceIt hinders and is equipped with battery on the left of sensor, the periphery of described two switching mode tunnel magneto-resistive sensors and battery is equipped with magnetic screenCover, is equipped with wiring board above the magnetic shielding cover, the wiring board be equipped with linear tunnel magnetoresistive sensor, photoelectric sensor,Liquid crystal display, single-chip microcontroller, infrared emission tube and infrared receiver tube.
Further, the impeller periphery is equipped with shield, and the shield is equipped with fin, for matching with watchcase positioningClose installation.
Further, described two switching mode tunnel magneto-resistive sensor setting angles are 45 °, orthogonal mounting arrangements.
Further, the magnetic shielding cover is made of soft iron and conductive coating, and the magnetic shielding cover can stop extraneous heightThe interference and attack of alternating electric field and extraneous magnetostatic field.
The beneficial effects of the utility model are:
The utility model is by using above-mentioned technical proposal departing from mechanically operated mode, and sensor is directly to single-chip microcontrollerPulse signal is provided, water meter work can be solved in small flow, the phenomenon that water meter is not allowed with metering without counting；It solves in water and leadsInterference of the magnetic material to radial magnet, prevents the interference in external alternating electric field and magnetic field, can use journey inside optical transport modification of signalSequence accurately can provide the pulse signal of impeller rotation for outside, can basis so that external computing unit is accurately measured and controlledThe operation of display program is opened and controlled to water meter cover.
The utility model has achieved the purpose that power consumptive province, precision are high, reliable for operation, improves the precision of water meter, extendsThe service life of water meter has the characteristics that structure is simple, anti-interference strong, practical, at low cost, high reliablity, can use extensivelyThe water meter of various electronic countings in Drinking Water Industry.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the schematic top plan view of the utility model；
In figure: 1- watchcase, 2- water inlet, the inner cavity 3-, 4- water outlet, 5- purification magnet, 6- impeller, 7- shield, 8- are convexRib, 9- radial magnet, 10- count control device, 11- switching mode tunnel magneto-resistive sensor, 12- battery, 13- magnetic shielding cover,14- wiring board, 15- linear tunnel magnetoresistive sensor, 16- photoelectric sensor, 17- liquid crystal display, 18- single-chip microcontroller, 19- are infraredLine transmitting tube, 20- infrared receiver tube.
Specific embodiment
To make technological means of the utility model, creation characteristic, reaching purpose and effect is more clear and is easy toSolution, the present invention will be further described in the following with reference to the drawings and specific embodiments.
Referring to Fig.1 shown in -2, a kind of dedicated electronic sensor counting device of drinking water meter provided by the utility model, includingWatchcase 1, watchcase 1 are equipped with water inlet 2, inner cavity 3 and water outlet 4；It is equipped with purification magnet 5 at water inlet 2, is equipped with leaf in inner cavity 3Wheel 6,6 periphery of impeller are equipped with shield 7, and shield 7 is equipped with fin 8, for installing with table location fit.The top of impeller 6 withRadial magnet 9 is connected, and count control device 10 is equipped with above radial magnet 9, sets that there are two switches in count control device 10Type tunnel magneto-resistive sensor 11, two switching mode tunnel magneto-resistive sensor setting angles are 45 °, orthogonal mounting arrangements.Two are openedBe equipped with battery 12 on the left of pass type tunnel magneto-resistive sensor 11, two switching mode tunnel magneto-resistive sensors 11 and battery 12 it is outerIt encloses and is equipped with magnetic shielding cover 13, wiring board 14 is equipped with above magnetic shielding cover 13, wiring board 14 is equipped with linear tunnel magnetoresistive sensor15, photoelectric sensor 16, liquid crystal display 17, single-chip microcontroller 18, infrared emission tube 19 and infrared receiver tube 20.
Application method: when water enters water meter from water inlet 2, being mounted on the purification magnet 5 of water inlet, can will be in waterIron, cobalt, nickel permeability magnetic material impurity absorption purification magnet 5 on, to reduce these impurity to the abrasion of impeller 6 and to radial directionThe influence of magnet 9.It is provided with impeller 6 in inner cavity 3, radial magnet 9 is housed on impeller 6, when water enters in water meter from water inlet 2Flowing, then from when the outflow of water outlet 4, the kinetic energy impeller 6 of water flow rotates, and radial magnet 9 rotates simultaneously with impeller 6, water flowSpeed it is directly proportional to the revolving speed of impeller 6, the water of certain unit volume is flowed through in water meter, impeller 6 just has certain rotationNumber.Count control device 10 is mounted in inner cavity 3 and is isolated from the outside world water.Two switches are filled in count control device 10Type tunnel magneto-resistive sensor 11, two switching mode tunnel magneto-resistive sensors 11 are mounted on the top of radial magnet 9, radial magnet 9When rotating with impeller 6, two switching mode tunnel magneto-resistive sensors 11 are capable of measuring the variable quantity in magnetic field when radial magnet 9 rotates, whenAt one 360 ° of the every rotation of radial magnet 9, switching mode tunnel magneto-resistive sensor 11 is sent out a pulse, by calculating pulseNumber can calculate the water consumption by water meter.The setting angle of two tunnel magneto-resistive sensors 11 is 45 °, orthogonal installation clothIt sets, the pulse that two switching mode tunnel magneto-resistive sensors 11 are sent out has a time difference, by detecting two switching mode tunnels11 burst length of road magnetoresistive sensor is poor, can calculate the direction of rotation of radial magnet 9.Radial magnet 9 is peripherally equipped with magnetic screenCover 13, magnetic shielding cover 13 is made of soft iron and conductive coating, and magnetic shielding cover 13 is mounted on two switching mode tunnel magneto-resistive sensors11 top, magnetic shielding cover 13 can stop the interference and attack of extraneous height alternating electric field and extraneous magnetostatic field.Linear tunnel magneticResistance sensor 15 can detect the intensity of external magnetic field, when external magnetic field reaches it is a certain amount of when, single-chip microcontroller 18 can adjust inner parameter,And alarm signal is issued to the computer of external connection.When staff or user check water meter information and open water meter cover,Photoelectric sensor 16 receives extraneous light, and single-chip microcontroller 18 controls liquid crystal display 17 and shows program operation, when water meter cover is closedAfterwards, photoelectric sensor 16 can not receive extraneous light single-chip microcontroller 18 and control the display program stopped operation of liquid crystal display 17.It is redThe program optic electric interface that outside line transmitting tube 19, infrared receiver tube 20 form is not required to when the utility model needs adjustment programmeExternal wire is wanted, forming using optical transmission signal in infrared emission tube 19, infrared receiver tube 20 can on program optic electric interfaceProgram is modified to it.The utility model can prevent permeability magnetic material in water from doing to radial magnet by using above-mentioned technical proposalIt disturbs, prevents the interference in external alternating electric field and magnetic field, optical transport modification of signal internal processes can be used, can accurately be provided for outsideThe pulse signal of impeller rotation can be opened according to water meter cover so that external computing unit is accurately measured and controlled and control and showThe operation of program, reaches that power consumptive province, precision be high, mesh reliable for operation.
The above is only the preferred embodiment of the utility model, does not do any restrictions, all bases to the utility modelAny change that the mentality of designing of technical solutions of the utility model is made, should be included in the protection scope of the utility model itIt is interior.