Measurement device for pile displacement and method for use of the same
First Claim
1. A system for measuring the displacement of a driven pile, in relation to a fixed reference, the system comprising:
- a support structure transversely spaced from a displacement axis of an associated driven pile to be displaced;
a radio frequency transmitter including a signal generator of a given frequency and a transmitter antenna, the transmitter antenna securable relative to one of the associated driven pile to be displaced and the support structure used as a fixed reference for the measurement of the displacement of the associated driven pile along the displacement axis,when in the secured position the transmitter antenna being positioned on and thereby defining both a transmitter axis parallel to the displacement axis and a center line perpendicular to the displacement axis, the transmitter antenna being configured to emit a radio frequency signal of the given frequency;
the system further comprising a first radio frequency receiver having a first receiver antenna securable relative to the other of the associated driven pile and the support structure;
and a second radio frequency receiver having a second receiver antenna securable relative to the other of the associated driven pile and the support structure, when in the secured position, the first and second receiver antennas being positioned along a receiver axis parallel to the displacement axis and the first and second receiver antennas being spaced along the receiver axis on either side of the transmitter antenna and the first and second receiver antennas being spaced along the receiver axis on either side of the center line by a receiver spacing such that the first and second receiver antennas are generally equidistant to the transmitter axis, the receiver axis being transversely spaced from the transmitter axis by an axis spacing, the first and second receiver antennas being configured to detect the radio frequency signal emitted by the transmitter;
wherein the support structure is fixed relative to an associated ground layer and extends upwardly from the associated ground layer;
the transmitter antenna, first receiver antenna and/or second receiver antenna that is/are fixed relative to the associated driven pile to be displaced moving with the associated driven pile as it is displaced;
the system further including a computing system in communication with the first and second receiver antennas and configured to receive a first signal from the first receiver and a second signal from the second receiver, the computing system further including a phase detector configured to detect the differences in phase between the first and second signals; and
,a computer processor to calculate the displacement of the associated driven pile based on the differences in the phase of the first and second signals.
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Accused Products
Abstract
A displacement measuring system to measure the displacement of a structural object that includes a transmitter having a signal generator and an antenna wherein the antenna is securable relative to one of a displaced object and a support. The antenna defines a transmitter axis that is parallel to the displacement axis of the object and a centerline that is perpendicular to the displacement axis. The system further includes a first receiver and a second receiver having antennas securable relative to the other of the object and the support. The receiver antennas are positioned along a receiver axis that is parallel to the displacement axis and being spaced along the receiver axis on either side of the center line. The receiver antennas are configured to detect a signal emitted by the transmitter. The system further includes a phase detector to triangulate phase change and calculate object displacement.
100 Citations
25 Claims
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1. A system for measuring the displacement of a driven pile, in relation to a fixed reference, the system comprising:
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a support structure transversely spaced from a displacement axis of an associated driven pile to be displaced; a radio frequency transmitter including a signal generator of a given frequency and a transmitter antenna, the transmitter antenna securable relative to one of the associated driven pile to be displaced and the support structure used as a fixed reference for the measurement of the displacement of the associated driven pile along the displacement axis, when in the secured position the transmitter antenna being positioned on and thereby defining both a transmitter axis parallel to the displacement axis and a center line perpendicular to the displacement axis, the transmitter antenna being configured to emit a radio frequency signal of the given frequency; the system further comprising a first radio frequency receiver having a first receiver antenna securable relative to the other of the associated driven pile and the support structure; and a second radio frequency receiver having a second receiver antenna securable relative to the other of the associated driven pile and the support structure, when in the secured position, the first and second receiver antennas being positioned along a receiver axis parallel to the displacement axis and the first and second receiver antennas being spaced along the receiver axis on either side of the transmitter antenna and the first and second receiver antennas being spaced along the receiver axis on either side of the center line by a receiver spacing such that the first and second receiver antennas are generally equidistant to the transmitter axis, the receiver axis being transversely spaced from the transmitter axis by an axis spacing, the first and second receiver antennas being configured to detect the radio frequency signal emitted by the transmitter; wherein the support structure is fixed relative to an associated ground layer and extends upwardly from the associated ground layer; the transmitter antenna, first receiver antenna and/or second receiver antenna that is/are fixed relative to the associated driven pile to be displaced moving with the associated driven pile as it is displaced; the system further including a computing system in communication with the first and second receiver antennas and configured to receive a first signal from the first receiver and a second signal from the second receiver, the computing system further including a phase detector configured to detect the differences in phase between the first and second signals; and
,a computer processor to calculate the displacement of the associated driven pile based on the differences in the phase of the first and second signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method of measuring displacement of a driven pile, the method comprising the steps of:
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providing a support structure; providing a radio frequency transmitter having a signal generator of a given frequency and a transmitter antenna and configured to emit a radio frequency signal; providing a first radio frequency receiver having a first receiver antenna, the first receiver antennas being configured to detect the radio frequency signal emitted by the transmitter; providing a second radio frequency receiver having a second receiver antenna, the second receiver antennas being configured to detect the radio frequency signal emitted by the transmitter; providing a computing system that is in communication with the first and second receiver antennas and configured to receive a first signal from the first receiver and a second signal from the second receiver, the computing system further including a phase detector configured to detect the differences in phase between the first and second signals; positioning the support structure such that it is transversely spaced from the driven pile to be displaced; defining a center line and a transmitter axis based on the position of the transmitter antenna, the center line being perpendicular to the transmitter axis; positioning the first and second receiver antennas relative to the driven pile to be displaced and the support structure along a receiver axis parallel to the transmitter axis; wherein the support structure is fixed relative to an associated ground layer and extends upwardly from the associated ground layer; spacing the first and second receiver antennas from one another along the receiver axis on either side of the center line and thus the transmitter antenna by a receiver spacing; spacing the receiver axis from the transmitter axis by an axis spacing; emitting a radio frequency signal from the transmitter; taking a first reading from the first and second receivers from the signal emitting in the emitting step; displacing the driven pile after the taking the first reading step; taking a second reading from the first and second receivers from the signal emitting in the emitting step after the displacing step; comparing the changes in phase from the first and second taking steps; and
,calculating the displacement of the displacing step based on the changes in phase from the comparing step. - View Dependent Claims (24, 25)
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Specification