Strata Proximity Systems LLC SPS-USZON Manual Do Utilizador
Confidential
Patent #’s 7,420,471
5,939,986 and 6,810,353
Patent Pending
5,939,986 and 6,810,353
Patent Pending
Page 3 of 6
Strata Proximity Systems Underground Silent Zone Generator Users Manual v1.0
Confidential and Proprietary
December 12,
2011
2011
1
Overview
The Underground Silent Zone Generator is part of a complete HazardAvert™ Proximity
Detection System from Strata Proximity Systems which provides warnings to both individuals
and to machinery to alert them that the individual has entered too close to an operating piece
of equipment and is in a dangerous situation. The Underground Silent Zone Generator is
mounted on a vehicle or piece of machinery and is connected by an interface cable to an
Underground controller. The Underground Silent Zone Generator is mounted on the vehicle or
machinery in an area near where the operator would normally be while operating the
machinery.
1.1 Theory of Operation
The function of the Underground Silent Zone Generator is:
To transmit a 73 kHz “Silent Zone” field around a small portion of the vehicle or piece of
machinery in which the operator is allowed to work or enter as part of his normal activities.
machinery in which the operator is allowed to work or enter as part of his normal activities.
The Underground Silent Zone Generator is connected to a HazardAvert™ Underground
Controller which generates a 73 kHz signal for creating a Silent Zone around the area of a
machine where the operator is located. This 73 kHz signal is connected to the Silent Zone
Generator via a wire bundle. Inside the Underground Silent Zone Generator is a wire/ferrite
radiator element to which the 73 kHz signal is connected. The 73 kHz signal passing through this
wire/ferrite radiator element generates a “Silent Zone” electromagnetic field which
encompasses only the small area of the machine in which the operator can be during operation.
The operator is required to wear a Personal Alarm Device (PAD) which is another component of
the HazardAvert™ system which detects and responds to the presence of 73 kHz fields. As long
as the operator is within this “Silent Zone” his PAD will know he is within a defined area and not
alarm. If the operator exits this Silent Zone area, his PAD will function to alert him and other
machines equipped with the HazardAvert™ system of his proximity to dangerous conditions
due to his distance from machine or vehicle hazards.
Controller which generates a 73 kHz signal for creating a Silent Zone around the area of a
machine where the operator is located. This 73 kHz signal is connected to the Silent Zone
Generator via a wire bundle. Inside the Underground Silent Zone Generator is a wire/ferrite
radiator element to which the 73 kHz signal is connected. The 73 kHz signal passing through this
wire/ferrite radiator element generates a “Silent Zone” electromagnetic field which
encompasses only the small area of the machine in which the operator can be during operation.
The operator is required to wear a Personal Alarm Device (PAD) which is another component of
the HazardAvert™ system which detects and responds to the presence of 73 kHz fields. As long
as the operator is within this “Silent Zone” his PAD will know he is within a defined area and not
alarm. If the operator exits this Silent Zone area, his PAD will function to alert him and other
machines equipped with the HazardAvert™ system of his proximity to dangerous conditions
due to his distance from machine or vehicle hazards.
1.2 Frequency of Operation
The Underground Silent Zone Generator will transmit on a frequency of 73 kHz.
1.3 Label Information
The Underground Silent Zone Generator label is located on the face of the unit. A picture of the
Strata label is below:
Strata label is below: