Water level measurement - Revision history

Uwe at 09:52, 19 February 2023

2023-02-19T09:52:54Z

← Older revision		Revision as of 11:52, 19 February 2023
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	* ECHO: measurement of return of sound wave		* ECHO: measurement of return of sound wave

	The device is connected to ~~a voltage translator with the commercial name [https://joy-it.net/en/products/COM-KY051VT KY-051].~~		The device is connected to an Arduino Uno.
	~~[[File:Example Wiring HC-SR04 to KY051VT.png\|thumb\|Example Wiring HC-SR04 to KY051VT]]~~
	~~The voltage translator is connected to the GPIO pins of the Raspberry Pi~~.

	The control logic is as following:		The control logic is as following:
Line 27:		Line 25:

	==== Software ====		==== Software ====
	The SW ~~implements an interrupt routine to capture~~ the ~~signal change timing~~ in the ~~component~~ [[SW Component ~~UltrSncDstncMsr~~]].		The Arduino Uno measures the travel time of the Ultra Sonic Wave.
	~~The signal is noisy. Therefore,~~ the ~~SW calculates~~ a filtered version of this signal ~~as well~~.		Arduino Uno and Raspberry Pi are connected via USB.
			The control SW running on the Raspberry Pi
			* reads the travel time of the wave in the [[SW Component ArdnIntrfc]].
			* calculates the travel distance and a low-pass filtered version of this signal in the [[SW Component UltrSncDstncMsr]].
			* calculates the corresponding water level of the refill tank in the [[SW Component RefillTnkLvl]].

Uwe at 13:58, 27 March 2022

2022-03-27T13:58:13Z

← Older revision		Revision as of 15:58, 27 March 2022
Line 28:		Line 28:
	==== Software ====		==== Software ====
	The SW implements an interrupt routine to capture the signal change timing in the component [[SW Component UltrSncDstncMsr]].		The SW implements an interrupt routine to capture the signal change timing in the component [[SW Component UltrSncDstncMsr]].
			The signal is noisy. Therefore, the SW calculates a filtered version of this signal as well.

Uwe at 13:45, 27 March 2022

2022-03-27T13:45:04Z

← Older revision		Revision as of 15:45, 27 March 2022
Line 20:		Line 20:
	The voltage translator is connected to the GPIO pins of the Raspberry Pi.		The voltage translator is connected to the GPIO pins of the Raspberry Pi.

			The control logic is as following:
			* The control system sets the TRIG channel to high.
			* HC-SR04 sends an ultrasonic wave to the surface of the water tank and set the ECHO channel to high at the same time.
			* The surface reflects the wave back towards the microphone of the HC-SR04.
			* The HC-SRC04 sets the ECHO channel to low upon receiving the reflected wave.

	==== Software ====		==== Software ====
	The SW implements an interrupt routine to capture the signal change timing.		The SW implements an interrupt routine to capture the signal change timing in the component [[SW Component UltrSncDstncMsr]].

Uwe at 13:37, 27 March 2022

2022-03-27T13:37:47Z

@@ Line 10: / Line 10: @@
 ==== Hardware ====
 The ultrasonic distance measurement device is sold with the commercial name [https://www.sparkfun.com/products/15569 HC-SR04].
 The device is connected to a voltage translator with the commercial name [https://joy-it.net/en/products/COM-KY051VT KY-051].
 The voltage translator is connected to the GPIO pins of the Raspberry Pi.

Uwe at 09:02, 27 March 2022

2022-03-27T09:02:33Z

← Older revision		Revision as of 11:02, 27 March 2022
Line 7:		Line 7:
	The SW system will record the time used for this travel and calculate the corresponding distance using the speed of sound.		The SW system will record the time used for this travel and calculate the corresponding distance using the speed of sound.
	[[File:Ultra Sonic Distance Sensor Installed On Top Of Refill Tank.png\|thumb\|Ultra Sonic Distance Sensor Installed On Top Of Refill Tank]]		[[File:Ultra Sonic Distance Sensor Installed On Top Of Refill Tank.png\|thumb\|Ultra Sonic Distance Sensor Installed On Top Of Refill Tank]]

			==== Hardware ====
			The ultrasonic distance measurement device is sold with the commercial name [https://www.sparkfun.com/products/15569 HC-SR04].
			The device is connected to a voltage translator with the commercial name [https://joy-it.net/en/products/COM-KY051VT KY-051].
			The voltage translator is connected to the GPIO pins of the Raspberry Pi.

Uwe at 08:49, 27 March 2022

2022-03-27T08:49:33Z

← Older revision		Revision as of 10:49, 27 March 2022
Line 6:		Line 6:
	The control system uses a device which generates an ultrasonic sound and measures when the sound wave has travelled back from the water surface.		The control system uses a device which generates an ultrasonic sound and measures when the sound wave has travelled back from the water surface.
	The SW system will record the time used for this travel and calculate the corresponding distance using the speed of sound.		The SW system will record the time used for this travel and calculate the corresponding distance using the speed of sound.
			[[File:Ultra Sonic Distance Sensor Installed On Top Of Refill Tank.png\|thumb\|Ultra Sonic Distance Sensor Installed On Top Of Refill Tank]]

Uwe: Created page with "==== Motivation ==== The measured water level is input for the calculation of the refill tank content. In order not to contaminate the water, a contact-less measurement is preferred. ==== Implementation ==== The control system uses a device which generates an ultrasonic sound and measures when the sound wave has travelled back from the water surface. The SW system will record the time used for this travel and calculate the corresponding distance using the speed of sound."

2022-03-27T08:35:31Z

Created page with "==== Motivation ==== The measured water level is input for the calculation of the refill tank content. In order not to contaminate the water, a contact-less measurement is preferred. ==== Implementation ==== The control system uses a device which generates an ultrasonic sound and measures when the sound wave has travelled back from the water surface. The SW system will record the time used for this travel and calculate the corresponding distance using the speed of sound."

New page

==== Motivation ====
The measured water level is input for the calculation of the refill tank content.
In order not to contaminate the water, a contact-less measurement is preferred.

==== Implementation ====
The control system uses a device which generates an ultrasonic sound and measures when the sound wave has travelled back from the water surface.
The SW system will record the time used for this travel and calculate the corresponding distance using the speed of sound.