HC-SR04 ultrasonic module ultrasonic ranging module ranging module ultrasonic sensor

1. The performance of this module is stable and the measurement distance is accurate.It can be comparable to foreign SRF05, SRF02 and other ultrasonic ranging modules.High -precision modules, blind spots (2cm) exceeding, stable ranging is a powerful basis for the success of this product to the market!This module is completely humble GH-311 anti-theft module

2 Main technical parameters:
1: Use voltage: DC5V 2: Static current: less than 2mA
3: level output: high 5V 4: level output: bottom 0V
5: Induction angle: No greater than 15 degrees 6: Detective distance: 2cm-510cm

7: High precision: up to 0.3cm

On -board wiring method, VCC, TRIG (control end), Echo (receiving end), out (empty foot), GND

Note: The TRIP pin is a 10K resistance in the interior. Use the IO port of the microcontroller to low the TRIP pin, and then give a pulse signal of more than 10us.
OUT foot is used as the switch output foot when the module is used as a anti -theft module. The ranging module does not need this foot!

Note: The module should be inserted on the circuit board and then power on the circuit board to avoid high -level misunderstandings. If it is generated, the power is re -power to solve.

This module can provide ranging program: C51, PIC18F877, Yilong single -chip machine, three MCU test references.

3. URF04 module working principle:

(1) Use IO trigger ranging to give at least 10US high -level signals;

(2) The module automatically sends 8 40kHz square waves to automatically detect whether there is a signal to return;

(3) There is a signal return. Output a high level through IO output, and the high level of duration is the time when the ultrasonic is transmitted from transmitting to returning.

Test distance = (high level time*sound speed*sound speed (340m/s))/2;

The method of using this product is simple. A high level of a control port of 10US can wait for the high level output at the receiving port. You can turn on the timer timer when there is output.The value of the timer, at this time for the time of this range to calculate the distance. Such a constant cyclical test can achieve the value of your mobile measurement ~~

Module working principle:
(1) Use IO trigger ranging to give at least 10US high -level signals;

(2) The module automatically sends 8 40kHz square waves to automatically detect whether there is a signal to return;

(3) With a signal return, output a high level through IO output, and the high level of duration is

The time of ultrasound from transmitting to returning.Test distance = (high level time*sound speed*sound speed (340m/s))/2;

This module can provide a full set of radical procedures: C51, PIC18F877, ultrasonic LCD1602, ultrasonic LCD12864 display, digital tube display, serial display, etc., ranging reference program.