The character of sensor of village cropland AMR reachs a dominant position

The character of sensor of village cropland AMR reachs a dominant position

[introduction] AMR sensor is a kind of tie-in magnet is used, the magnetoresistive variation that uses specific direction magnetic field to bring realizes detected magnetism sensor. The article introduced AMR (magnetic) the main character of sensor, advantage, difference that with its he sends feeling kind, wait quite.
 
The character of sensor of village cropland AMR reachs a dominant position
 
01 essentials
 
AMR sensor is a kind of tie-in magnet is used, the magnetoresistive variation that uses specific direction magnetic field to bring realizes detected magnetism sensor.
 
The product type of all sorts of sensitivity that can offer an alternative, dimension is rich, can select the product that fits most according to your need.
 
   ○ also has narrow the high accuracy product of sensitivity limits.
 
The S/N magnetic pole of conversed magnet, the output signal of sensor also won’t produce change.
 
AMR sensor product has the following strong point.
 
With Huo Er IC photograph comparing can detect magnetic field range is big, because this has the following feature.
 
   The installation configuration of ○ magnet and sensor is more agile.
   Limits of error of the Xu Rong when ○ casing body or installation is OK bigger.
 
Different the structural part such as canal striking spring, product volume is smaller, more reliable.
 
02 jobs principle
 
1.Basic and characteristic
 
Of AMR detect the element is the ferromagnetic metal that comprises by Ni, Fe.
 
The character of sensor of village cropland AMR reachs a dominant position
Working principle
 
2.Sensor interior makes a plan
 
  ○ AMR sensor is AMR element and the IC that its signal changes multiplier word signal compositive the product in an organic whole.
   ○ is carried by the input (VDD) , GND is carried (VSS) , output is carried (VOUT) 3 terminal is formed.
   ○ uses up electric current to use intermittent sampling circuit to reduce.
 
The character of sensor of village cropland AMR reachs a dominant position
 
3.Prevent intermittent report shock
 
  ○ is prevent intermittent report shock, set magnetic hysteresis area.
 
 (Intermittent report shake: When the contact of relay or switch produces switch, as a result of very fast and little mechanical vibration can be brought about produce electronic signal intermittent, this also is one of causes that cause circuit happening error. This also is one of causes that cause circuit happening error..
 
   ○ is close to magnet when sensor when, when magnetic field intensity exceeds MOP, VOUT turns into from H L.
   ○ is far from magnet when sensor when, magnetic field intensity under MRP when, VOUT turns into from L H.
 
The character of sensor of village cropland AMR reachs a dominant position
 
03The specialty of AMR sensor
 
1.With the distinction of Huo Er IC
 
The character of sensor of village cropland AMR reachs a dominant position
 
  ○ consults next graphs can know, can be used by AMR sensor the range of magnetic field is bigger, detect so range is bigger.
   ○ detects range is bigger the influence that the error when meaning the common difference that can draw frame and installation brings. Compare with photograph of magnet of Huo Er IC, what also can design magnet is smaller thinner.
 
The character of sensor of village cropland AMR reachs a dominant position
The relation of sensor and magnetic field
 
2.With the distinction of canal striking spring
 
AMR sensor and dry spring are in charge of photograph comparing to have the following strong point:
 
   ○ volume is minor, the price is low.
   ○ but low voltage drive.
   ○ blame is hollow enclose, so impulse withstand and drop, reliability is high.
 
The character of sensor of village cropland AMR reachs a dominant position
 
 

Leave a Reply

Your email address will not be published. Required fields are marked *