A kind of mechanical type remote transmitting water meter rotating sensing magnetic needleTechnical field
The invention belongs to water meter field, particularly a kind of mechanical type remote transmitting water meter rotating sensing magnetic needle.
Background technology
Existing remote transmitting water meter is mostly by the magnetic needle installed in the internal counter axis of dial plate and tableMagneto-dependent sensor cooperation in the external control module of face realizes electronic counting.Existing magnetic needle is for installingThe magnetic needle of single Magnet, it is impossible to realize rotating tally function.And, existing carrying magnetic sensorInstrument use magnetic needle there is no shielding construction.Due to the amphicheirality of magnetic pole, when magnetic needle turns with instrumentWhen moving axis rotates a circle, it is possible to cause magnetic needle that magnetic sensor is carried out magnetic induction twice, thusCause the erroneous judgement of instrument.For avoiding the generation of this phenomenon, the size to the magnetic field intensity of magnetic needleRequiring relatively tight, sensor consistency and installation site require the highest, and magnetic field intensity has been selected little mayDo not sense, selected big it may happen that twice magnetic induction.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that a kind of mechanical type remote transmitting water meterRotating sensing magnetic needle, uses and installs the Magnet placed on the contrary of two magnetic poles in counter axis, can be withMagneto-dependent sensor cooperation realizes rotating signals collecting.
The present invention solves its technical problem and is achieved through the following technical solutions:
A kind of mechanical type remote transmitting water meter rotating sensing magnetic needle, it is characterised in that: include counter axis,Graduated disc and permanent magnet, counter axis upper end is shaped with graduated disc, and the lower surface of this graduated disc is symmetricalIt is shaped with Magnet embedding slot, in this Magnet embedding slot, is embedded in the permanent magnet of two opposite polarities.
And, described graduated disc lower surface is formed respectively with one near the inner side of two Magnet embedding slotsIndividual shielding sheet embedding slot, setting-in shielding sheet in this shielding sheet embedding slot.
Advantages of the present invention and having the beneficial effect that
1, this mechanical type remote transmitting water meter rotating sensing magnetic needle, counter axis upper end is shaped with graduated disc,The lower surface symmetry of this graduated disc is shaped with Magnet embedding slot, is embedded in two phases in this Magnet embedding slotThe permanent magnet of reversed polarity, can with two magneto-dependent sensors with the use of, by permanent magnet signalSensing order, it is achieved rotating signals collecting.
2, this mechanical type remote transmitting water meter rotating sensing magnetic needle, graduated disc lower surface is near two MagnetThe inner side of embedding slot is formed respectively with a shielding sheet embedding slot, setting-in screen in this shielding sheet embedding slotCovering sheet, make the magnetic field intensity choosing value scope of two permanent magnets widen, its magnetic induction can beWithin 1000GS to 5000GS, can overcome because magnetic decay causes not induced magnetism sensor, i.e.Ensure that magnetic induction is reliable, avoid again erroneous judgement, extend service life, make magnetic sensor collectionThe signal that magnetic needle rotates is accurate.
3, present configuration design science is reasonable, can realize rotating signals collecting, and magnetic induction is reliable,Ensure the accuracy of magneto-dependent sensor mechanism.
Accompanying drawing explanation
Fig. 1 is the structure sectional view of the present invention.
Description of reference numerals:
1-graduated disc, 2-Magnet embedding slot, 3-permanent magnet, 4-shield sheet embedding slot, 5-shields sheet,6-counter axis.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings, and following example are illustrative, noIt is determinate, it is impossible to limit protection scope of the present invention with this.
A kind of mechanical type remote transmitting water meter rotating sensing magnetic needle, it include counter axis 6, graduated disc 1 andPermanent magnet 3, counter axis upper end is shaped with graduated disc, and the lower surface symmetry of this graduated disc is shaped with MagnetEmbedding slot 2, is embedded in the permanent magnet of two opposite polarities in this Magnet embedding slot.
While magnetic needle rotates, the level of each magneto-dependent sensor changes 2 states respectively, and totally 4Individual state.If high level is 1, low level is 0, is respectively 00,10,11,01 during rotating forward.MagneticThe most also can collect 4 states when pin 10 inverts, only order is positive and negative is 01,11,10,00.By 4 status signals and signal tandem, soft by controller for water meter and kilowatt meter reading-out systemThe signal collected is arranged by part, can sentence watermeter flowing rate and water meter rotating exactlyDisconnected.
Graduated disc lower surface is formed respectively with a shielding sheet setting-in near the inner side of two Magnet embedding slotsGroove 4, setting-in shielding sheet 5 in this shielding sheet embedding slot.The magnetic field intensity making two permanent magnets is selectedValue scope is widened, and its magnetic induction can be able to overcome because of magnetic within 1000GS to 5000GSDecay causes not induced magnetism sensor, i.e. ensures that magnetic induction is reliable, avoids again erroneous judgement, extendsIn service life, signal that magnetic needle rotates is accurate to make magnetic sensor gather.
Although disclosed embodiments of the invention and accompanying drawing for the purpose of illustration, but the technology of this areaPersonnel are appreciated that without departing from the present invention and spirit and scope of the appended claims, variousReplace, to change and modifications be all possible, and therefore the scope of the present invention is not limited to embodiment and attachedFigure disclosure of that.