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| Honeywell's
Magnetic Sensors offer a Low-Cost Solution
for Vehicle Recognition and Vehicle
Detection Systems |
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| Whether
mounted in the pavement, or alongside
vehicle traffic lanes, Honeywell's magneto-resistive
sensor technology offers high sensitivity
solutions for detecting vehicles. From
bicycles to fork lifts to automobiles
to locomotives to airplanes, these vehicles
contain ferrous materials that disturb
the uniform intensity and direction
of the earth's magnetic field. Depending
on ferrous material content and proximity
to the sensors, vehicle disturbances
of the earth's magnetic field from 15
meters or more can be detected. Automobiles
can easily be detected within one meter
of the sensor without significant discrimination
circuitry. Typical applications include
door opening, safety crossbar operation,
traffic monitoring, parking space detection,
and vehicle location/positioning. |
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| Combinations
of sensors can be used with enhanced
signal processing to do vehicle recognition/signature
collection task. Additionally small
displacements of identically oriented
sensors can be used to determine vehicle
direction and speed information. Because
Honeywell's magnetic sensors are very
small and environmentally robust, they
make cost-effective implementations
and retrofits for detecting vehicles
and traffic. |
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| For
real-world examples of how Honeywell
products have been used for vehicle
detection applications, please see our
Literature page or click on the PDF
File below. |
AN-218 Vehicle Detection Using AMR Sensors  343K |
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| The
HMC Family of Magnetic Sensor Products
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| Honeywell
Solid State Electronics Center offers
a complete line of HMC magnetic sensor devices suitable for magnetic vehicle
detection applications. The following
summarizes the candidate sensors and
sensing solution for vehicle detection: |
- The
HMC1001 1-axis and HMC1002 2-axis magnetic sensors offer
the highest magnetic field
sensitivity for applications
requiring the most discrimination.
- The
HMC1021 1-axis and HMC1022 2-axis magnetic
sensors a more compact solution
for magnetic field disturbances,
with the HMC1023 3-axis sensor
array providing all three
orthogonal vectors of magnetic
field measurement.
- The
HMC1051 1-axis, HMC1052 2-axis,
and HMC1053 3-axis magnetic
sensors feature the ultimate
in low cost, compact magnetic
field sensor products.
- The
HMC2003 magnetic sensor hybrid
is a circuit board based design
featuring the HMC1001/HMC1002
sensors and instrumentation
amplifiers offering a complete
factory calibrated 3-axis
magnetic sensor array and
signal conditioning for drop-in
sensing solutions.
- The
HMR2300 Smart Digital Magnetometer
offers a complete RS-232 or
RS-485 interface modular solution
to magnetic field disturbance
detection suitable for proof-of-concept
data gathering, or in high-end
applications needing a convenient
digital interface.
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