Ultrasonic Acoustic Remote Sensing - Revision history

Ruiming: /* Distance Measurement Based on Time-Of-Flight Technique (MCUST16A40S12RO) (Experiment 2) */

2025-04-29T12:24:12Z

Distance Measurement Based on Time-Of-Flight Technique (MCUST16A40S12RO) (Experiment 2)

← Older revision		Revision as of 20:24, 29 April 2025
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	It is clear that both method gave excellent estimates of the speed of sound. The second method provided a slightly better estimate, but both methods should suffice for distance measurements once calibrated.		It is clear that both method gave excellent estimates of the speed of sound. The second method provided a slightly better estimate, but both methods should suffice for distance measurements once calibrated.

Ruiming: /* Distance Measurement Based on Phase Change Technique (MCUSD14A48S09RS-30C) (Experiment 3) */

2025-04-29T12:23:54Z

Distance Measurement Based on Phase Change Technique (MCUSD14A48S09RS-30C) (Experiment 3)

← Older revision		Revision as of 20:23, 29 April 2025
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	* 70^-5m: -6.293333333333334 +- 0.74deg		* 70^-5m: -6.293333333333334 +- 0.74deg
	The results were presented collectively with a gradient of -5.48138017e+04 +- 0.86e+04 which implies a speed of sound of 320+-49m/s. Once calibrated, this method can serve as a viable solution to fine-grained distance measurement. However, the propagation distance between the transducers should be small to obtain stable phase measurements.		The results were presented collectively with a gradient of -5.48138017e+04 +- 0.86e+04 which implies a speed of sound of 320+-49m/s. Once calibrated, this method can serve as a viable solution to fine-grained distance measurement. However, the propagation distance between the transducers should be small to obtain stable phase measurements.

Ruiming: /* Distance Measurement Based on Phase Change Technique (MCUSD14A48S09RS-30C) (Experiment 3) */

2025-04-29T12:23:39Z

Distance Measurement Based on Phase Change Technique (MCUSD14A48S09RS-30C) (Experiment 3)

← Older revision		Revision as of 20:23, 29 April 2025
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	* 70^-5m: -6.293333333333334 +- 0.74deg		* 70^-5m: -6.293333333333334 +- 0.74deg
	The results were presented collectively with a gradient of -5.48138017e+04 +- 0.86e+04 which implies a speed of sound of 320+-49m/s. Once calibrated, this method can serve as a viable solution to fine-grained distance measurement. However, the propagation distance between the transducers should be small to obtain stable phase measurements.		The results were presented collectively with a gradient of -5.48138017e+04 +- 0.86e+04 which implies a speed of sound of 320+-49m/s. Once calibrated, this method can serve as a viable solution to fine-grained distance measurement. However, the propagation distance between the transducers should be small to obtain stable phase measurements.

Ruiming: /* Distance Measurement Based on Phase Change Technique (MCUSD14A48S09RS-30C) (Experiment 3) */

2025-04-29T12:23:26Z

Distance Measurement Based on Phase Change Technique (MCUSD14A48S09RS-30C) (Experiment 3)

← Older revision		Revision as of 20:23, 29 April 2025
Line 315:		Line 315:
	* 70^-5m: -6.293333333333334 +- 0.74deg		* 70^-5m: -6.293333333333334 +- 0.74deg
	The results were presented collectively with a gradient of -5.48138017e+04 +- 0.86e+04 which implies a speed of sound of 320+-49m/s. Once calibrated, this method can serve as a viable solution to fine-grained distance measurement. However, the propagation distance between the transducers should be small to obtain stable phase measurements.		The results were presented collectively with a gradient of -5.48138017e+04 +- 0.86e+04 which implies a speed of sound of 320+-49m/s. Once calibrated, this method can serve as a viable solution to fine-grained distance measurement. However, the propagation distance between the transducers should be small to obtain stable phase measurements.

Ruiming: /* Distance Measurement Based on Phase Change Technique (MCUSD14A48S09RS-30C) (Experiment 3) */

2025-04-29T12:23:13Z

Distance Measurement Based on Phase Change Technique (MCUSD14A48S09RS-30C) (Experiment 3)

← Older revision		Revision as of 20:23, 29 April 2025
Line 315:		Line 315:
	* 70^-5m: -6.293333333333334 +- 0.74deg		* 70^-5m: -6.293333333333334 +- 0.74deg
	The results were presented collectively with a gradient of -5.48138017e+04 +- 0.86e+04 which implies a speed of sound of 320+-49m/s. Once calibrated, this method can serve as a viable solution to fine-grained distance measurement. However, the propagation distance between the transducers should be small to obtain stable phase measurements.		The results were presented collectively with a gradient of -5.48138017e+04 +- 0.86e+04 which implies a speed of sound of 320+-49m/s. Once calibrated, this method can serve as a viable solution to fine-grained distance measurement. However, the propagation distance between the transducers should be small to obtain stable phase measurements.

Ruiming: /* Distance Measurement Based on Phase Change Technique (MCUSD14A48S09RS-30C) (Experiment 3) */

2025-04-29T12:22:57Z

Distance Measurement Based on Phase Change Technique (MCUSD14A48S09RS-30C) (Experiment 3)

← Older revision		Revision as of 20:22, 29 April 2025
Line 315:		Line 315:
	* 70^-5m: -6.293333333333334 +- 0.74deg		* 70^-5m: -6.293333333333334 +- 0.74deg
	The results were presented collectively with a gradient of -5.48138017e+04 +- 0.86e+04 which implies a speed of sound of 320+-49m/s. Once calibrated, this method can serve as a viable solution to fine-grained distance measurement. However, the propagation distance between the transducers should be small to obtain stable phase measurements.		The results were presented collectively with a gradient of -5.48138017e+04 +- 0.86e+04 which implies a speed of sound of 320+-49m/s. Once calibrated, this method can serve as a viable solution to fine-grained distance measurement. However, the propagation distance between the transducers should be small to obtain stable phase measurements.

Ruiming: /* Results */

2025-04-29T12:22:19Z

Results

← Older revision		Revision as of 20:22, 29 April 2025
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	* 60^-5m: -1.4765625 +- 0.84deg		* 60^-5m: -1.4765625 +- 0.84deg
	* 70^-5m: -6.293333333333334 +- 0.74deg		* 70^-5m: -6.293333333333334 +- 0.74deg
	The results were presented collectively with a gradient of -5.48138017e+04 +- 0.86e+04 which implies a speed of sound of 320+-49m/s. Once calibrated, this method can serve as a viable solution to fine-grained distance measurement. However, the propagation distance between the transducers should be small.		The results were presented collectively with a gradient of -5.48138017e+04 +- 0.86e+04 which implies a speed of sound of 320+-49m/s. Once calibrated, this method can serve as a viable solution to fine-grained distance measurement. However, the propagation distance between the transducers should be small to obtain stable phase measurements.

Ruiming: /* Distance Measurement Based on Phase Change Technique (MCUSD14A48S09RS-30C) (Experiment 3) */

2025-04-29T12:20:08Z

Distance Measurement Based on Phase Change Technique (MCUSD14A48S09RS-30C) (Experiment 3)

← Older revision		Revision as of 20:20, 29 April 2025
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	== Distance Measurement Based on Phase Change Technique (MCUSD14A48S09RS-30C) (Experiment 3) ==		== Distance Measurement Based on Phase Change Technique (MCUSD14A48S09RS-30C) (Experiment 3) ==
	<div style="text-align:justify">		<div style="text-align:justify">
	In the third experiment we consider an ultrasonic remote sensing technique in the presence of minute changes in distance. This can be used, for example, in sensing the surface roughness of what should be flat surfaces.		For our bonus set of objectives we use one other set of transducers procured for the project: the 48kHz metallic MCUSD14A48S09RS-30C. In the third experiment we consider an ultrasonic remote sensing technique in the presence of minute changes in distance. This can be used, for example, in sensing the surface roughness of what should be flat surfaces.
	=== Set-up ===		=== Set-up ===
	[[File:RuiMingSetUp2.png\|200px\|frameless\|center\|Experimental set up for phase-based distance measurement]]		[[File:RuiMingSetUp2.png\|200px\|frameless\|center\|Experimental set up for phase-based distance measurement]]

Ruiming: /* Method */

2025-04-29T12:16:47Z

Method

← Older revision		Revision as of 20:16, 29 April 2025
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	** Moreover, there is the difficulty of defining the start-end points of the TOF measurement or the point of trigger & echo, particularly when the pulses are not sharply defined in time		** Moreover, there is the difficulty of defining the start-end points of the TOF measurement or the point of trigger & echo, particularly when the pulses are not sharply defined in time

	The first problem can be solved by calibrating the instrument via multiple measurements over known distances. The result should be linear where the Y intercept corresponds to the offset while the (gradient)^-1 corresponds to the speed of sound in air (343m/s).		The first problem can be solved by calibrating the instrument via multiple measurements over known distances. The result should be linear where the Y intercept corresponds to the offset while the <math>({{gradient}^{-1}})</math> corresponds to the speed of sound in air (343m/s).

	To solve the second problem, two different methods were conceived:		To solve the second problem, two different methods were conceived:
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	#In the second method, we perform a cross correlation of the trigger and echo signals.		#In the second method, we perform a cross correlation of the trigger and echo signals.
	## The location of the peak of the cross correlation measurement, where the two signals most overlap, corresponds to the time difference		## The location of the peak of the cross correlation measurement, where the two signals most overlap, corresponds to the time difference
	# The experiment was conducted on an optical breadboard. Measurements were taken in steps of 2.5cm using the breadboard spacing.		# The experiment was conducted on an optical breadboard. Measurements were taken in steps of 2.5cm using the breadboard spacing.

	=== Results ===		=== Results ===

Ruiming: /* Distance Measurement Based on Time-Of-Flight Technique (MCUST16A40S12RO) (Experiment 2) */

2025-04-29T12:13:57Z

Distance Measurement Based on Time-Of-Flight Technique (MCUST16A40S12RO) (Experiment 2)

← Older revision		Revision as of 20:13, 29 April 2025
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	== Distance Measurement Based on Time-Of-Flight Technique (MCUST16A40S12RO) (Experiment 2) ==		== Distance Measurement Based on Time-Of-Flight Technique (MCUST16A40S12RO) (Experiment 2) ==
	<div style="text-align:justify">		<div style="text-align:justify">
	For our next set of objectives to build our own set-up in order to obtain raw data to study, we start with one set of transducers procured for the project, the 40kHz metallic MCUST16A40S12RO.		For our next set of objectives to build our own set-up in order to obtain raw data to study, we start with one set of transducers procured for the project: the 40kHz metallic MCUST16A40S12RO. We start with TOF measurement-based techniques.
	=== Set-Up ===		=== Set-Up ===
	[[File:RuiMingSetUp.png\|200px\|frameless\|center\|Caption]]		[[File:RuiMingSetUp.png\|200px\|frameless\|center\|Caption]]