NIS-AX Motion Sensor - Revision history

Arl: /* get the samples from the fifo */

2018-03-08T16:29:31Z

‎get the samples from the fifo

2018-03-08T15:19:40Z

‎get the samples from the fifo

2018-03-08T15:15:26Z

‎Freefall tests

2018-03-08T14:08:07Z

‎state 2

2018-03-08T13:53:06Z

‎Freefall tests

2018-03-08T11:48:48Z

‎state 2

2018-03-08T11:45:45Z

‎Accelerometer sensor properties

2017-12-20T16:01:03Z

2017-12-20T08:48:52Z

‎Accelerometer sensor properties

2017-12-19T17:48:48Z

@@ Line 81: / Line 81: @@
 ==== get the samples from the fifo ====
-Following the interruption of freefall, the previous 32 samples are found again, and we continue to retrieve the following samples.
+Following the interruption of freefall, the previous 32 samples are recovered, and we continue to retrieve the subsequent samples.
 Thanks to this process, it is possible to analyze the buffer and condition the alert accordingly.
 [[File:Freefall-75cm-25Hz-interrupt-FF-reverse.png|400px]]

@@ Line 83: / Line 83: @@
 Following the interruption of freefall, the previous 32 samples are found again, and we continue to retrieve the following samples.
 Thanks to this process, it is possible to analyze the buffer and condition the alert accordingly.
 [[File:Freefall-75cm-25Hz-interrupt-FF-reverse.png|400px]]

← Older revision		Revision as of 15:15, 8 March 2018
Line 79:		Line 79:

	[[File:Freefall-75cm-25Hz-states3.png\|400px]]		[[File:Freefall-75cm-25Hz-states3.png\|400px]]
		+
		+	==== get the samples from the fifo ====
		+	Following the interruption of freefall, the previous 32 samples are found again, and we continue to retrieve the following samples.
		+	Thanks to this process, it is possible to analyze the buffer and condition the alert accordingly.
		+	[[File:Freefall-75cm-25Hz-interrupt-FF-reverse.png\|400px]]

@@ Line 63: / Line 63: @@
 Free fall, we get an acceleration that decreases for a short moment. That's the condition we can detect. The vectorial sum of the 3 axes tends towards 0G.
 in our example, the stable part of the free fall lasts about 230ms for a height of 75cm.
 === state 3 ===

← Older revision		Revision as of 13:53, 8 March 2018
Line 72:		Line 72:
	=== state 5 ===		=== state 5 ===
	After a fall, the human body may not move for some time. The vector sum always corresponds to gravity, however the sensor may have changed its orientation.		After a fall, the human body may not move for some time. The vector sum always corresponds to gravity, however the sensor may have changed its orientation.
		+
		+	=== tests with different ODR values ===
		+
		+	[[File:Freefall-75cm-25Hz-states3.png\|400px]]

← Older revision		Revision as of 11:45, 8 March 2018
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	[[File:Computer-530Hz-vibration.png\|400px]]		[[File:Computer-530Hz-vibration.png\|400px]]
	[[File:Embedded-530Hz-vibration.png\|400px]]		[[File:Embedded-530Hz-vibration.png\|400px]]
		+
		+	== Freefall tests ==
		+	To test human fall, we made tests at 1344Hz.
		+	These tests were carried out from a height of 75 cm, representing a worse case, where the fall is from a very low height.
		+
		+	[[File:Freefall-75cm-1344Hz-states.png\|400px]]
		+
		+	=== state 1 ===
		+	Initial state, in the case shown, gravity appears on the Z axis, the sensor being positioned horizontally.
		+
		+	=== state 2 ===
		+	Free fall, we get an acceleration that decreases for a short moment. That's the condition we can detect. The vectorial sum of the 3 axes tends towards 0G.
		+
		+	=== state 3 ===
		+	Impact. For the test carried out, the impact took place on a flexible surface (foam). Nevertheless, we can measure a large shock. The idea is to detect this activity following the detection of free fall.
		+
		+	=== state 4 ===
		+	bouncing. Following the impact, a few jolts may appear, depending on the environment in which the fall occurs.
		+
		+	=== state 5 ===
		+	After a fall, the human body may not move for some time. The vector sum always corresponds to gravity, however the sensor may have changed its orientation.

@@ Line 14: / Line 14: @@
 This sensor has full scales of ±2g/±4g/±8g/±16g and is capable of measuring accelerations with output data rates from 1 Hz to 5.3 kHz.
-It can be used as vibration monitoring system.
+* Impact detection
 This sensor can check the vibrational footprint and thus the health status of your machine several times a day and provide data to the server. This system makes it possible to carry out maintenance based on reliability by anticipating problems. This system also allows daily measurements to be made on machines in dangerous, remote and inaccessible locations.
 It can detect whether the machine is running or not.

← Older revision		Revision as of 08:48, 20 December 2017
Line 13:		Line 13:

	This sensor has full scales of ±2g/±4g/±8g/±16g and is capable of measuring accelerations with output data rates from 1 Hz to 5.3 kHz.		This sensor has full scales of ±2g/±4g/±8g/±16g and is capable of measuring accelerations with output data rates from 1 Hz to 5.3 kHz.
		+
		+	It can be used as vibration monitoring system.
		+	This sensor can check the vibrational footprint and thus the health status of your machine several times a day and provide data to the server. This system makes it possible to carry out maintenance based on reliability by anticipating problems. This system also allows daily measurements to be made on machines in dangerous, remote and inaccessible locations.
		+	It can detect whether the machine is running or not.
		+

	== Frequency response (mg/Hz) ==		== Frequency response (mg/Hz) ==

@@ Line 14: / Line 14: @@
 This sensor has full scales of ±2g/±4g/±8g/±16g and is capable of measuring accelerations with output data rates from 1 Hz to 5.3 kHz.
-== Frequency response ==
+== Frequency response (mg/Hz) ==
 === Comparison for 80Hz vibration ==