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added documentation for ultrasonic sensor / fixes issue w other files #205

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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,7 @@
import jakarta.inject.Named;


//tag::ex[]
@Controller("/ultraSound")
public class UltraSonicSensorController {

Expand Down Expand Up @@ -55,3 +56,4 @@ public String disableUltrasoundSensor() {
return "Ultra Sonic Sensor Disabled";
}
}
//end::ex[]
Original file line number Diff line number Diff line change
@@ -0,0 +1,101 @@
:imagesdir: img/

ifndef::rootpath[]
:rootpath: ../../
endif::rootpath[]

ifdef::rootpath[]
:imagesdir: {rootpath}{imagesdir}
endif::rootpath[]


==== Ultrasonic Sensor
[.text-right]
https://github.com/oss-slu/Pi4Micronaut/edit/develop/micronautpi4j-utils/src/docs/asciidoc/components/inputComponents/ultraSonicSensor.adoc[Improve this doc]

===== Overview
This document provides details of the Ultrasonic Sensor circuit,
including its components, assembly instructions, and functionality.

===== Components
. HC SR04
. T-Extension Board
. Breadboard
. Jumper wires
. Power source

===== Circuit Diagram
Model:

image::ultrasonic_sensor_model.png[]



Circuit Diagram:

image::ultrasonic_sensor_circuit.png[]

===== Functionality
The Ultrasonic Sensor uses sound waves to calculate the distance from itself to the surface it is pointed at.
The resulting measurement is accurate within a range of 3mm of the true measurement.
The Ultrasonic Sensor's signal is stable within 5m of the sensor, gradually weakening until the signal fully disappears at 7m.

Some information about the trigger and echo signals (from the sunfounder docs):
The timing diagram is shown below. You only need to supply a short 10us pulse for the trigger input to start the ranging,
and then the module will send out an 8 cycle burst of ultrasound at 40 kHz and raise its echo.
You can calculate the range through the time interval between sending trigger signal and receiving echo signal.

Formula: us / 58 = centimeters or us / 148 =inch; or: the range = high level time * velocity (340M/S) / 2;
you are suggested to use measurement cycle over 60ms in order to prevent signal collisions of trigger signal and the echo signal.

image::ultrasonic_sensor_timing_diagram.png[]



===== Troubleshooting
. Distance measurements not showing: Check all connections, ensure the sensor is placed correctly,
and check the power source.

===== YAML Pin Order
The order for declaring the Trigger Pin for the Ultrasonic Sensor is as follows:

[source, yaml]
----
digital-input:
ultra-sonic-trig:
address: 23
----
So the Trigger Pin would be connected to GPIO 23.

The order for declaring the Echo Pin for the Ultrasonic Sensor is as follows:

[source, yaml]
----
digital-output:
ultra-sonic-echo:
address: 24
----
So the Echo Pin would be connected to GPIO 24.

===== Constructors

[source, java]
----
include::../../../../../../pi4micronaut-utils/src/main/java/com/opensourcewithslu/inputDevices/UltraSonicSensorHelper.java[tag=const]
----

===== Methods

[source, java]
----
include::../../../../../../pi4micronaut-utils/src/main/java/com/opensourcewithslu/inputDevices/UltraSonicSensorHelper.java[tags=method]
----

===== An Example Controller

====== This controller uses the Ultrasonic Sensor to calculate distance from the sensor to a surface

[source, java]
----
include::../../../../../../components/src/main/java/com/opensourcewithslu/components/controllers/UltraSonicSensorController.java[tag=ex]
----
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2 changes: 2 additions & 0 deletions pi4micronaut-utils/src/docs/asciidoc/index.adoc
Original file line number Diff line number Diff line change
Expand Up @@ -66,6 +66,8 @@ include::components/inputComponents/rfidScanner.adoc[]

include::components/inputComponents/photosensor.adoc[]

include::components/inputComponents/ultraSonicSensor.adoc[]


include::components/outputComponents.adoc[]

Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -23,7 +23,10 @@ public class UltraSonicSensorHelper {
* @param triggerPin The DigitalOutput pin for triggering the ultrasonic sensor.
* @param echoPin The DigitalInput pin for receiving the echo from the ultrasonic sensor.
*/
public UltraSonicSensorHelper(DigitalOutput triggerPin, DigitalInput echoPin) {
//tag::const[]
public UltraSonicSensorHelper(DigitalOutput triggerPin, DigitalInput echoPin)
//end::const[]
{
this.triggerPin = triggerPin;
this.echoPin = echoPin;
initialize();
Expand All @@ -32,7 +35,10 @@ public UltraSonicSensorHelper(DigitalOutput triggerPin, DigitalInput echoPin) {
/**
* Initializes the Ultrasonic Sensor
*/
public void initialize() {
//tag::method[]
public void initialize()
//end::method[]
{
log.info("Ultrasonic Sensor Initialized");
sensorActive = true;
// TriggerPin is low initially
Expand All @@ -42,7 +48,10 @@ public void initialize() {
/**
* Begins measuring distance from sensor calling triggerAndMeasureDistance function every 100 milliseconds
*/
public void startMeasuring() {
//tag::method[]
public void startMeasuring()
//end::method[]
{
if (!sensorActive) {
return;
}
Expand Down Expand Up @@ -110,7 +119,10 @@ private void calculateDistance(long durationInNano) {
*
* @return The distance value in centimeters.
*/
public double getDistanceInCentimeter() {
//tag::method[]
public double getDistanceInCentimeter()
//end::method[]
{
return distance;
}

Expand All @@ -119,14 +131,20 @@ public double getDistanceInCentimeter() {
*
* @return The distance value in meters.
*/
public double getDistanceInMeters() {
//tag::method[]
public double getDistanceInMeters()
//end::method[]
{
return distance/100;
}

/**
* Shuts down ultrasonic sensor
*/
public void stopMeasuring() {
//tag::method[]
public void stopMeasuring()
//end::method[]
{
sensorActive = false;
if (!executorService.isShutdown()) {
executorService.shutdownNow();
Expand Down
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