Gate Controls Buying AdviceAs
more and more people??£¤s standard of living increases, many
want to live in gated residential communities. Because of
this, gated residential communities and garden apartments
across the country are being built at unprecedented speed. All
gated and fenced residential communities have several things
in common. Gates and fences provide the perception of
security, safety, and privacy. In affluent residential
neighborhoods, privacy means exclusivity and therefore
increased property values. Adding an attractive automatic
entry gate system can easily add a lot more to a single family
home values within some communities regardless of whether it
has any effect on crime. |
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A gate controlling system usually includes a microprocessor
which normally automatically closes a gate after it has been opened
in response to a radio signal or sensor loop signal, and which
normally locks the gate against movement when the gate motor is
stopped. When an obstruction is sensed in the path of the gate, the
automatic closing feature and the sensor loops are disabled, the
gate drive remains unlocked even though the motor is stopped, and
the response of the system to a radio signal is changed to produce
alternating opening and closing of the gate on successive radio
signals. At all times, the gate drive lock is released before the
motor is started and is not engaged until after the gate has come to
rest. Field adjustment of the obstruction sensor is avoided by
generating an obstruction signal only when the gate speed falls
below the operating speed of a gate imposing the largest design load
on the motor, and the speed at which an obstruction is sensed is
adjustable in discrete increments by digital switches so that the
specific load level at which the system sees an obstruction may be
selected to fit various conditions.
In the gate control set,
there are an oscillator arranged for generating the first pulse
signal on which the AC output frequency of the inverter is based, a
delay circuit for generating a second pulse signal delayed for a
predetermined period of time from the first pulse signal, and a ring
counter for generating responsive to the second pulse signal a phase
reference signal corresponding in phase to the AC output of the
inverter. An ON pulse is generated responsive to the second pulse
and the phase reference signal and an OFF pulse responsive to the
first pulse and the phase reference signal. A negative bias signal
is generated following the OFF pulse.
Buying
Suggestions:
Adding a new gate to your residence may cost
you a large sum of money. So please spend time on comparing all the
different sets and modules for all kinds of gate control. Check how
many channels the digital transceiver has and how long the range is.
Check the battery and backup battery and make sure all the wireless
components are working well. It is important to verify the security
of the signal as you don't want someone else to be able to open your
gate without your permission.
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