Lesson 10--Microduino Ultrasonic Ranging - 版本历史

2015年3月20日 (五) 02:16 1304410487@qq.com

2015-03-20T02:16:18Z

2015年3月20日 (五) 02:15 1304410487@qq.com

2015-03-20T02:15:24Z

2015年3月20日 (五) 02:12 1304410487@qq.com

2015-03-20T02:12:20Z

Pkj：/* Program */

2014-03-29T07:51:27Z

‎Program

Pkj：Created page with "{{Language | 第十课--Microduino 超声波测距}} {| style="width: 800px;" |- | ==Objective== This lesson will show how to use the Microduino ultrasonic ranging module cont..."

2014-03-09T12:12:11Z

Created page with "{{Language | 第十课--Microduino 超声波测距}} {| style="width: 800px;" |- | ==Objective== This lesson will show how to use the Microduino ultrasonic ranging module cont..."

新页面

{{Language | 第十课--Microduino 超声波测距}}
{| style="width: 800px;"
|-
|
==Objective==
This lesson will show how to use the Microduino ultrasonic ranging module control buzzer. You can learn the ultrasonic control by this simple example.

Test object is the SRF-04 ultrasonic sensors, with four pins: 5v power supply (Vcc), trigger control pin (Trig), the receiver (Echo), and the GND.

Related technical documents for ultrasonic you search on the internet, we won't give a detailed introduction in this lesson.

==Equipment==
*'''[[Microduino-Core]]'''
*'''[[Microduino-FT232R]]'''
*Other equipments:
**Breadboard Jumper one box
**Breadboard one piece
**USB Data cable one
**Buzzer one
**Ultrasonic sensor one

'''Ultrasonic sensor'''
[[File:第十课-超声波传感器.jpg|600px|center|thumb]]
'''Brief Introduction：'''
Ultrasonic sensor is designed by the characteristics of ultrasonic. Ultrasound is a kind of mechanical wave of vibration frequency is higher than the sound wave, is generated by changing the chip vibration under the excitation of voltage. It has a higher frequency, shorter wavelengths, small diffraction phenomenon, especially good directivity, can become rays and directional transmission etc. Ultrasonic penetrating power of liquid and solid is very big, especially in sunshine opaque solid, it can penetrate tens of metres in depth. Ultrasonic encounter impurities or interface can produce significant reflection form into echo, touching the moving objects can produce doppler effect. So ultrasonic detection is widely used in industry, national defense, biomedicine etc.

'''Components：'''
Ultrasonic probe is mainly composed of piezoelectric wafer, can emit ultrasonic already, also can receive ultrasonic. Low power ultrasound probe for detecting effect. It has a lot of different structure, can be divided into straight probe (longitudinal wave), oblique probe (shear wave) and surface wave probe (surface wave), lamb wave sensor (lamb wave), double probe (a probe reflection, a probe receiving) etc.

==Schematic==
[[File:第十课-Microduino超声波测距原理图.jpg|600px|center|thumb]]

==Program==
<source lang="cpp">

const int TrigPin = 3;
const int EchoPin = 2;
float cm;

void setup()
{
Serial.begin(9600);
pinMode(TrigPin, OUTPUT);
pinMode(EchoPin, INPUT);
pinMode(8,OUTPUT);
}
void loop()
{
digitalWrite(8, LOW);
digitalWrite(TrigPin, LOW); //Send a low level voltage pulse to TrigPin
delayMicroseconds(2);
digitalWrite(TrigPin, HIGH);
delayMicroseconds(10);
digitalWrite(TrigPin, LOW);

cm = pulseIn(EchoPin, HIGH) / 58.0; //Echo time convert to cm
cm = (int(cm * 100.0)) / 100.0; //Keep two decimal places
if (cm>=2 && cm<=10)
digitalWrite(8, HIGH);
}

</source>

==Debug==
Step 1：Copy the upper code to IDE and compile

Step 2：Compile no error, then set up the circuit, as follows:
[[File:第十课-Microduino超声波测距电路图.jpg|600px|center|thumb]]

Step 3: Run program

Step 4：Put the hand in front of ultrasonic sensor, listening the sound of the buzzer.

==Result==
If there is an object in front of the ultrasonic sensor, and the distance of the object is larger than 2 cm, less than 10 cm, buzzer will sound. You can make an ultrasonic alarm based on this.

==Video==
http://v.youku.com/v_show/id_XNjc1NjQxMjU2.html

←上一版本		2015年3月20日 (五) 02:16的版本
第71行：		第71行：

	Step 2：Compile no error, then set up the circuit, as follows:		Step 2：Compile no error, then set up the circuit, as follows:
		+
		+	[[File:intermediateLesson10Connect1.jpg\|600px\|center\|thumb]]
		+	[[File:intermediateLesson10Connect2.jpg\|600px\|center\|thumb]]
		+
	[[File:第十课-Microduino超声波测距电路图.jpg\|600px\|center\|thumb]]		[[File:第十课-Microduino超声波测距电路图.jpg\|600px\|center\|thumb]]

←上一版本		2015年3月20日 (五) 02:15的版本
第19行：		第19行：
	**Ultrasonic sensor one		**Ultrasonic sensor one

		+	[[File:intermediateLesson10All1.jpg\|600px\|center\|thumb]]
		+	[[File:intermediateLesson10All2.jpg\|600px\|center\|thumb]]

	'''Ultrasonic sensor'''		'''Ultrasonic sensor'''

←上一版本		2014年3月29日 (六) 07:51的版本
第33行：		第33行：

	==Program==		==Program==
		+	Download program:
		+	https://github.com/Microduino/Microduino_Tutorials/tree/master/Microduino_Advanced/MicroduinoUltrasonicRanging
		+
	<source lang="cpp">		<source lang="cpp">

@@ 第4行： / 第4行： @@
+|
 ==Objective==
-This lesson will show how to use the Microduino ultrasonic ranging module control buzzer. You can learn the ultrasonic control by this simple example.
+This lesson will show how to use the Microduino ultrasonic ranging module to control buzzer. You'll know the ultrasonic control by this simple example.
-Test object is the SRF-04 ultrasonic sensors, with four pins: 5v power supply (Vcc), trigger control pin (Trig), the receiver (Echo), and the GND.
+Test object is the SRF-04 ultrasonic sensors with four pins: 5v power supply (Vcc), trigger control pin (Trig), the receiver (Echo), and the GND.
 ==Equipment==