US-025/US-026 design of ultrasonic distance measuring module V1.0

    provides the module schematic, PCB, BILL of material (BOM), and so a full set of information; Can be customized according to customer requirements.

Download PDF link: //pan.baidu.com/s/1uMa2faQTJWEZZ_QaFvsk9w extraction code: q3uk

if it is found that with the existing module, can be unconditional returns.

In who didn't go to tin and without human case of damage, for whatever reason, they can be unconditional return.

1. Overview

US-025/US-026 ultrasonic module is recently the launch of the high-performance, low-cost, ultrasonic ranging module; Module uses the high performance-to-price ratio ultrasonic ranging chip CS100; Ranging up to 6 m above the ranging accuracy is high; Measuring a good consistency, ranging, stable and reliable.

US-025/US-026 design of ultrasonic distance measuring module may be implemented now 2cm ~ 6m of non-contact distance measurement function, operating voltage for 3V-5.5V operating current is 5.3mA, support GPIO communication mode, work stable and reliable.

US-025 with the US-026 performance is the same as that size is the same as the principle is the same.

The difference:

1. US-025 the double-sided board, US-026 uses a single sided board;
2. US-025 the 4Pin header in positive welding (probe side),US-026 is famous for single sided board, front (the probe side) no pad, pad on the back side (chip side) welding.

1. Main technical parameters

1. this module picture and size

US-025 design of ultrasonic distance measuring module as shown in Figure 1 and Figure 2:

in this module, the size: 45mm * 20mm * 1.2mm. The board has four radius 1mm mechanical hole,

1. module schematic

1. interface Description

in this module, you 'd have an interface: 4-Pin power supply and communication interface, US-025 with US-026 interface is the same.

4 Pin interface for 2.54mm spacing of the bent pins,

from left to right sequentially numbered 1,2,3,4. They are defined as follows:

1. 1 no Pin: Pick up VCC power supply (DC 3V-5.5V).
2. 2 No Pin: pick up an external circuit of the Trig end to this Pin input a 10uS above the high level, which can trigger module ranging.
3. 3 No Pin: pick up an external circuit of the Echo-side, when the distance measurement at the end of this Pin will output a high level width ultrasonic round-trip time sum.
4. 4 No Pin: pick up an external circuit of.

1. Ranging working principle

figure 9: Outside the measurement range return value

the measurement period: when receiving the US-025/US-026 by Echo pin out of the high-level pulse after, can be carried out the next measurement, the measurement period is dependent upon the measured distance, when the distance the object to be measured were very close, Echo returned pulse width is narrow, the measurement period would be very brief; When the distance measured object comparison far Echo returned pulse width measuring period over the variable-length.

The worst case, the object to be measured beyond the ultrasonic module of measuring range, in this case the returned pulse width for the longest about 66ms, so the worst case of the measurement cycle is slightly larger in 66ms can take 70ms enough).

Appendix: US-025/US-026 high-precision ranging routine (Ard.ui.no routines)

unsigned int EchoPin = 2;

unsigned int TrigPin = 3;

unsigned long Time_Echo_us = 0;

//Len_mm_X100 = length*100

unsigned long Len_mm_X100 = 0;

unsigned long Len_Integer = 0; //

unsigned int Len_Fraction = 0;

void setup()

{

serial.begin(9600);

pinMode(EchoPin, INPUT);

pinMode(TrigPin, OUTPUT);

}

void loop()

{

digitalWrite(TrigPin, HIGH);

delayMicroseconds(50);

digitalWrite(TrigPin, LOW);

Time_Echo_us = pulseIn(EchoPin, HIGH);

if((Time_Echo_us < 60000) && (Time_Echo_us > 1))

{

Len_mm_X100 = (Time_Echo_us * 34)/2;

Len_Integer = Len_mm_X100/100;

Len_Fraction = Len_mm_X 100%-100;

serial.print("Present Length is: ");

serial.print(Len_Integer, DEC);

serial.print(".");

if(Len_Fraction < 10)

serial.print("0");

serial.print(Len_Fraction, DEC);

serial.println("mm");

}

delay(1000);

}

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