Metal detector configuration v4 - Revision history

Ypypy: /* Parameters description */

2018-05-22T10:42:07Z

‎Parameters description

Ypypy: /* General functionality description */

2018-04-10T13:13:30Z

‎General functionality description

Ypypy at 11:31, 10 April 2018

2018-04-10T11:31:34Z

Ypypy: /* Parameters description */

2018-04-10T10:51:50Z

‎Parameters description

Ypypy: /* Parameters description */

2018-04-10T10:50:26Z

‎Parameters description

Ypypy: /* Parameters description */

2018-03-23T08:51:36Z

‎Parameters description

Ypypy at 08:50, 23 March 2018

2018-03-23T08:50:03Z

Ypypy: /* Hardware configuration */

2018-03-23T08:48:19Z

‎Hardware configuration

Ypypy at 08:46, 23 March 2018

2018-03-23T08:46:17Z

Ypypy at 08:45, 23 March 2018

2018-03-23T08:45:59Z

@@ Line 48: / Line 48: @@
 * '''sense_th''' - sensitivity threshold detection setting. The parameter values are selected based on the noise level.
-: ''Features: [0.3], [0.01 .. 1.00], [RWS].''
+: ''Features: [0.3], [0.01 .. 10.00], [RWS].''
 * '''criteria''' - time-sense based estimation of metal response. This is the main response value for detection.

@@ Line 6: / Line 6: @@
 Device works as mono (only one coil, or antenna) metal detector. So device has a connector for metal detectors coil, separate LED indication output, separate parameters for choosing sound indication and groups of parameters "Metal" and "Metal Adv."  for tuning.
-The system responde to a moving metal in the area of the metal detectors antenna. If reaction correspond to metal detection settings it consider as alarm. So internal state is changing to alarm state, alarm counter is incrementing, common system buzzer is switching-on ("slow beeps" by default), correspond external LED indication is switching-on.
+The system responde to a moving metal in the area of the metal detectors antenna. If reaction correspond to metal detection settings it consider as alarm. So internal state is changing to alarm state, alarm counter is incrementing, common system buzzer is switching-on ("slow beeps" by default), correspond external LED2 indication is switching-on.
 After a short time when metal is not moving or it is out of the detection area, if reaction is less then metal detection settings it consider as end of alarm. So internal state is changing to normal state, common system buzzer and corresponded external LED indication is switching-off.

@@ Line 38: / Line 38: @@
 [[File:Combie manual metaldet 2.1.png|thumb|right|450px|Fig. 3: Detection algorithm 0. An example of changing the metal detector alarm state in time depending on the response value (dV) and the influence of the tuning parameters (th, in delay, out delay)]]
-[[File:Combie manual metaldet 2.1.png|thumb|right|450px|Fig. 4: (Under editing!!!) Detection algorithm 1. An example of changing the the metal detector alarm state in time depending on dV, criteria and the influence of the tuning parameters (sense_th, criteria_th)]]
+[[File:Combie criteria.png|thumb|right|450px|Fig. 4: Main detection algorithm 1. An example of changing the the metal detector alarm state in time depending on dV, criteria and the influence of the tuning parameters (sense_th, criteria_th)]]
 :&nbsp;&nbsp;

@@ Line 51: / Line 51: @@
 * '''criteria''' - time-sense based estimation of metal response. This is the main response value for detection.
-: This calculated for '''algo''' > 0. ''Features [var], [float], [RW], [Monitor only].''
+: ''Features [var], [float], [RW], [Monitor only].''
 * '''criteria_th''' - [approx. x100 ms] the time-based detection setting. The parameter value is selected dependent on desired
 : time filtering level vs detection range. This means the minimum time for target bag detection.
 : Also it means the maximum time when visitors personal metal smartphone, watch, keys etc. don't makes alarm.
-: This affected when '''algo''' > 0. ''Features [60], [1.0 .. 100.0], [RWS].''
+: ''Features [60], [1.0 .. 100.0], [RWS].''
 * '''period ave''' - estimated value of oscillation period in the metal detector loop. Usualy this range can be 50..4320 ticks.

@@ Line 44: / Line 44: @@
 '''Parameters of "Metal" group.'''
-* '''algo''' - detection algorithm. ''Features: [1], [0, 1], [RWS].''
-: '''''0''''' - simple metal detector. Detection is depended only on "sense_th" and "in time" (see Fig. 3).
-: '''''1''''' - metal detector with advanced filtering.  Detection is depended on "sense_th" and "criteria_th"  (see Fig. 4).
-:: This provides the sense-time filtering from near passed small and fast metal object (phones, watches, keys etc.).
-−
 * '''dV''' - the response of the system to the metal. ''Features: [var], [float], [RW], [Monitor only].''
@@ Line 83: / Line 79: @@
 '''Parameters groups Metal Adv.''' for metal detection advanced tuning.
 Generally this contain infrequently or uncommonly used parameters.
 * '''in delay''' & '''out delay''' - time setting for detection triggering when '''''dV''''' is exceeded above '''''sense_th''''' and at detection loss at '''''dV''''' is less than '''''sense_th'''''. This only affected when '''algo''' == 0. ''Features [20], [uint], [RWS].''

@@ Line 34: / Line 34: @@
 === Parameters description ===
-[[Parameters_characteristics|Parameters features explanation]]
+[[Parameters_Features|Parameters features explanation]]
 [[File:Combie manual metaldet 2.1.png|thumb|right|450px|Fig. 3: Detection algorithm 0. An example of changing the metal detector alarm state in time depending on the response value (dV) and the influence of the tuning parameters (th, in delay, out delay)]]

← Older revision		Revision as of 08:50, 23 March 2018
Line 34:		Line 34:

	=== Parameters description ===		=== Parameters description ===
		+	[[Parameters_characteristics\|Parameters features explanation]]

	[[File:Combie manual metaldet 2.1.png\|thumb\|right\|450px\|Fig. 3: Detection algorithm 0. An example of changing the metal detector alarm state in time depending on the response value (dV) and the influence of the tuning parameters (th, in delay, out delay)]]		[[File:Combie manual metaldet 2.1.png\|thumb\|right\|450px\|Fig. 3: Detection algorithm 0. An example of changing the metal detector alarm state in time depending on the response value (dV) and the influence of the tuning parameters (th, in delay, out delay)]]

@@ Line 13: / Line 13: @@
 === Hardware configuration ===
-Device has on board connector for metal detector winding with following contacts.
+Device has on board connector for metal detector coil with following contacts.
 {|border=1 cellpadding=5
 |-
-|Pin 1||1-st end of winding
+|Pin 1||1-st end of coil
 |-
 |Pin 2||N.C. or GND
 |-
-|Pin 3||2-nd end of winding
+|Pin 3||2-nd end of coil
 |}
 The recommended configuration of the metal detector winding is shown in Figure 1.
-The recommended winding of the metal detector should contain three concentric coils of a stranded wire with a cross section of 0.25 .. 1 mm2. The ends of the winding (1, 2) must be twisted with each other to reduce the effect of external electromagnetic radiation.
+The recommended coil of the metal detector should contain three concentric turns of a stranded wire with a cross section of 0.25 .. 1 mm2. The ends of the coil(1, 2) must be twisted with each other to reduce the effect of external electromagnetic radiation.
-In general, the winding can be of arbitrary shape, configuration, and contain 3 or 4 coils. The parameters of the winding wiggle on the frequency of the metal detection circuit, the geometric dimensions of the winding affect the sensitivity in the detection of metal.
+In general, the winding can be of arbitrary shape, configuration, and contain 3 or 4 turns. The parameters of the coil wiggle on the frequency of the metal detection circuit, the geometric dimensions of the antenna affect the sensitivity in the detection of metal.
 In the case of installation sequentially in a row with a number of pedestals > 2 to reduce the mutual influence, it is recommended to change the frequency in the metal detecting circuit of each even pedestal (even/odd). To do this, you need to permanently remove both jumpers that are on the board near the metal detector connector, which will change the frequency of the metal detector.

@@ Line 1: / Line 1: @@
 __TOC__
-[[File:Combie_manual_coil.png|right|thumb|200px|Fig. 1: Recommended configuration of the metal detector coil/antenna]]
+[[File:Combie_manual_coil.png|right|thumb|200px|Fig. 1: Recommended configuration of the metal detector coil / antenna]]
 === General functionality description ===