Tension monitoring arrangement and method
First Claim
1. In a system for installing an underground utility by retraction that is applied to a leading end of the utility to draw the utility through the ground such that the utility is subjected to a tension force, said system including an inground tension monitoring arrangement having a processor which receives electrical power from a power supply in a way which subjects the processor to a loss of power that is temporary during system operation, as well as a shut-down loss of power condition, either of which causes the processor to reset, an apparatus comprising:
- a detector for producing an output voltage that is responsive to a time duration of the loss of power; and
said processor configured for comparing the output voltage, subsequent to a reset, to a threshold value to establish whether the reset is responsive to a power supply bounce condition during operation.
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Accused Products
Abstract
Tension monitoring is described using a sensor which may exhibit an offset for which compensation may be provided to produce a zero voltage amplified output or to increase dynamic range. An arrangement determines whether a power reset is responsive to a battery bounce such that an initially-measured system start-up parameter can be retained. The start-up parameter is automatically saved at start-up if the power reset is responsive to a start-up from a shut-down condition. The start-up parameter may be a zero tension amplified output responsive to the sensor offset at zero tension. Protection of a tension data set is provided such that no opportunity for altering the data set is presented prior to transfer of the data set. A housing configuration forms part of an electrical power circuit for providing electrical power to an electronics package from a battery.
38 Citations
6 Claims
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1. In a system for installing an underground utility by retraction that is applied to a leading end of the utility to draw the utility through the ground such that the utility is subjected to a tension force, said system including an inground tension monitoring arrangement having a processor which receives electrical power from a power supply in a way which subjects the processor to a loss of power that is temporary during system operation, as well as a shut-down loss of power condition, either of which causes the processor to reset, an apparatus comprising:
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a detector for producing an output voltage that is responsive to a time duration of the loss of power; and said processor configured for comparing the output voltage, subsequent to a reset, to a threshold value to establish whether the reset is responsive to a power supply bounce condition during operation. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification