Various applications are possible with the combination
of a Pulse Perm Sensor and a magnet
Linear motion
Reciprocal motion
Rotational motion
registered trademarks of Nikkoshi Co. Ltd.
Examples of Pulse Perm Sensor applications
- Gas meter
- Contactless switch
- Rotation sensor
- Flowmeter
- Droplet sensor
- Linear sensor
- Wind gauge
- Seismoscope
- Security systems
- Speedometer
- Door switch
- FA switch
- Nilometer
Pulse Perm Sensor characteristics
Double structure wire sensor using a large Barkhausen jump
Output independent of magnetic field motion speed
Simple construction, only a detection coil wrapped in a Pulse Perm Wire
Performance temperature range: -40 degrees to 120 degrees
An even more high temperature type is being developed.
PPS operating principles
Comments on operating principals of the Pulse Perm Sensor with a pattern diagram that shows the Pulse Perm Sensor (right) and a magnet with reverse polarity attached in alternation to a rotor (left).
The Pulse Perm Sensor is constructed of a composite magnetic wire with a detection coil placed nearby. (In the wire the distribution of the magnetic properties is a double structure, the outside is a soft magnetic layer, and the inside is a hard magnetic layer. The product’s name is Pulse Perm Wire.)
The rotor turns and the rotated external magnetic field becomes stronger.
There is an inverted external magnetic field and when it passes a fixed value, there is a Large Barkhausen jump and the direction of magnetization on the outside of magnetic wire instantly reverses.
At this time the magnetic field change is detected in the coil as a pulse voltage.
At this time, with no relationship to the speed of the external magnetic field change, a fixed pulse voltage is always generated. Even if it is a very low speed magnetic field change like a once a day change, there is no chattering.
An example of the detection coil direct current resistance value150Ω±10%
Pulse detection example
5V or more half bandwidth 20μs
