Methods, systems, and computer program products for determining a property of construction material

• US 7,581,446 B2
• Filed: 08/30/2006
• Issued: 09/01/2009
• Est. Priority Date: 08/30/2005
• Status: Active Grant

• Current Assignee: Troxler Electronic Laboratories, Inc.
• Original Assignee: Troxler Electronic Laboratories, Inc.
• Inventors: Troxler, Robert Ernest
• Primary Examiner(s): Kwok; Helen C.
• Application Number:
  US11/513,334
• Publication Number:
  US 20070046289A1
• Time in Patent Office: 1,098 Days
• Field of Search: 73/32.A, 73620-623, 73/617.5, 73/617.1, 738/665, 735/92, 735/98, 324/323, 324/334, 324344-350, 367/14, 367/188
• US Class Current: 73/623
• CPC Class Codes: G01N 19/10 Measuring moisture content, e.g. by measuring change in length of hygroscopic filament; Hygrometers
• CPC Class Codes: G01N 2223/1013 gamma
• CPC Class Codes: G01N 23/005 by using neutrons G01N23/02 - G01N23/227 take precedence
• CPC Class Codes: G01N 23/02 by transmitting the radiation through the material
• CPC Class Codes: G01N 23/025 using neutrons
• CPC Class Codes: G01N 23/06 and measuring the absorption
• CPC Class Codes: G01N 23/203 Measuring back scattering
• CPC Class Codes: G01N 27/048 for determining moisture content of the material
• CPC Class Codes: G01N 33/24 Earth materials G01N33/42 takes precedence
• CPC Class Codes: G01N 33/246 for water content for control of watering A01G25/167
• CPC Class Codes: G01N 33/42 Road-making materials G01N33/38 takes precedence
• CPC Class Codes: G01N 9/24 by observing the transmission of wave or particle radiation through the material
• CPC Class Codes: H05K 2203/162 Testing a finished product, e.g. heat cycle testing of solder joints patterns for electrical inspection or testing H05K1/0268
• CPC Class Codes: H05K 999/99 dummy group

Abstract

Methods, systems, and computer program products for determining a property of construction material. According to one aspect, a material property gauge operable to determine a property of construction material is disclosed. The gauge may include an electromagnetic sensor operable to measure a response of construction material to an electromagnetic field. Further, the electromagnetic sensor may be operable to produce a signal representing the measured response by the construction material to the electromagnetic field. An acoustic detector may be operable to detect a response of the construction material to the acoustical energy. Further, the acoustic detector may be operable to produce a signal representing the detected response by the construction material to the acoustical energy. A material property calculation function may be configured to calculate a property value associated with the construction material based upon the signals produced by the electromagnetic sensor and the acoustic detector.

Claims

1. A material property gauge for determining a property of construction material, the material property gauge comprising:

(a) an electromagnetic sensor operable to measure a response of construction material to an electromagnetic field generated by an electromagnetic source and operable to produce a signal representing the measured response by the construction material to the electromagnetic field;

(b) an acoustic detector operable to detect a response of the construction material to an acoustical energy generated by an acoustical source and operable to produce a signal representing the detected response by the construction material to the acoustical energy; and

(c) a material property calculation function configured to calculate a property value associated with the construction material based upon the signals produced by the electromagnetic sensor and the acoustic detector.

2. The material property gauge of claim 1 wherein the electromagnetic sensor includes at least one of a fringing field sensor, a capacitance sensor, a microwave sensor, a microwave resonator, a waveguide sensor, a transmission line sensor, a time domain reflectometer (TDR), and an antenna.

3. The material property gauge of claim 1 wherein the construction material comprises a material selected from the group consisting of soil, asphalt, pavement, stone, sub-base material, and sub-grade material.

4. The material property gauge of claim 1 wherein the acoustic detector comprises a device selected from the group consisting of a geophone, an accelerometer, a vibration sensor, piezoelectric component, an inductive coil, a magnetostrictive component, a bender element, micro-electro-mechanical system (MEMS)-based device, a seismic pavement analyzer, a force sensor, a velocity sensor, and a stiffness gauge, a hardness gaga, a falling weight deflectometer, dynamic cone penetrometer, and a stiffness gauge.

5. The material property gauge of claim 1 comprising an electromagnetic field generator operable to emit the electromagnetic field into the construction material.

6. The material property gauge of claim 5 wherein the electromagnetic field generator comprises a device selected from the group consisting of a voltage controlled oscillator (VCO), a Clapp oscillator, a relaxation oscillator, a ring oscillator, an RC oscillator, a crystal oscillator, a blocking oscillator, a phase-locked oscillator, a voltage oscillator, a multivibrator, a Gunn diode, a numerically-controlled oscillator, a backward wave oscillator, a VLF transmitter, an integrated circuit timer, an arbitrary waveform generator, a pulse-wide modulation device, an analog synthesizer, current sources, synthesized sources, YIG-tuned oscillators, and integrated circuits.

7. The material property gauge of claim 1 wherein the material property calculation function is configured to calculate a density of the construction material based on the signals produced by the electromagnetic sensor and the acoustic detector.

8. The material property gauge of claim 1 wherein the material property calculation function is configured to correct a density calculation of the construction material based on the signal produced by the electromagnetic sensor.

9. The material property gauge of claim 8 wherein the signal produced by the electromagnetic sensor represents a moisture property value associated with the construction material.

10. The material property gauge of claim 1 wherein the material property calculation function is configured to correct a density calculation of the construction material based on the signal produced by the acoustic sensor.

11. The material property gauge of claim 1 wherein the material property calculation function is configured to calculate one or more of a density, a moisture value, and a modulus of the construction material based on the signals produced by the electromagnetic sensor and the acoustic detector.

12. The material property gauge of claim 11 wherein the signal produced by the electromagnetic sensor represents a voids value associated with the construction material.

13. The material property gauge of claim 1 comprising an acoustic generator operable to emit the acoustical energy into the construction material.

14. The material property gauge of claim 13 wherein the acoustic generator comprises a device selected from the group consisting of a penetrometer, a Clegg Hammer, a falling weight deflectometer, a Briaud compaction device, and an FWD, a geophone, an accelerometer, a vibration sensor, a piezoelectric device, an inductive coil-based device, a magnetostrictive device, a bender element, and micro-electro-mechanical system (MEMS)-based device, electromechanical shakers, solenoid activated hammers, instrumented hammers, frequency domain devices, and time domain devices.

15. The material property gauge of claim 1 comprising a display operable to display the property value associated with the electromagnetic sensor and the acoustic detector.

16. The material property gauge of claim 1 comprising a penetrometer operable to measure at least one of moisture, density, stiffness, hardness, and modulus of the construction material, and wherein the material property calculation function is configured to correct a density or modulus calculations of the construction material based on the measured at least one of moisture, density, and modulus.

31. The material property gauge of claim 1 wherein the electromagnetic sensor is operated in one of a time domain and a frequency domain.

32. The material property gauge of claim 1 wherein the acoustic detector comprises a device selected from the group consisting of a geophone, an accelerometer, and a vibration sensor.

17. A method for determining a property of construction material, the method comprising:

(a) measuring a response of construction material to an electromagnetic field generated by an electromagnetic source;

(b) producing a signal representing the measured response by the construction material to the electromagnetic field;

(c) detecting a response of the construction material to acoustical energy generated by an acoustical source;

(d) producing a signal representing the detected response by the construction material to the acoustical energy; and

(e) calculating a property value associated with the construction material based upon the produced signals.

18. The method of claim 17 wherein the construction material comprises a material selected from the group consisting of soil, asphalt, pavement, aggregate, stone, sub-base material, sub-grade material, sand, and concrete.

19. The method of claim 17 wherein calculating a property value associated with the construction material includes calculating one of a density, a moisture value, and a modulus of the construction material based on the produced signals.

20. The method of claim 17 comprising correcting a density calculation of the construction material based on the signal.

21. The method of claim 17 comprising correcting a density calculation of the construction material based on the signal representing the measured response by the construction material to the electromagnetic field.

22. The method of claim 17 comprising emitting the acoustical energy into the construction material.

23. The method of claim 17 comprising displaying the calculated property value.

24. A computer program product comprising computer executable instruction embodied in a computer readable medium for performing steps comprising:

(a) measuring a response of construction material to an electromagnetic field generated by an electromagnetic source;

(b) producing a signal representing the measured response by the construction material to the electromagnetic field;

(c) detecting a response of the construction material to acoustical energy;

(d) producing a signal representing the detected response by the construction material to the acoustical energy generated by an acoustical source; and

(e) calculating a property value associated with the construction material based upon the produced signals.

25. The computer program product of claim 24 wherein the construction material comprises a material selected from the group consisting of soil, asphalt, pavement, stone, sub-base material, sand, and sub-grade material.

26. The computer program product of claim 24 wherein calculating a property value associated with the construction material includes calculating one of a density, a moisture value, and a modulus of the construction material based on the produced signals.

27. The computer program product of claim 24 comprising correcting a density calculation of the construction material based on the signal produced by the electromagnetic sensor.

28. The computer program product of claim 24 comprising correcting a density calculation of the construction material based on the signal representing the measured response by the construction material to the electromagnetic field.

29. The computer program product of claim 24 comprising emitting the acoustical energy into the construction material.

30. The computer program product of claim 24 comprising displaying the calculated property value.