תיאור
1. This module has stable performance and accurate distance measurement. It is comparable to foreign ultrasonic ranging modules such as SRF05 and SRF02 . The module’s high precision, ultra-close blind zone (2cm), and stable ranging are a strong basis for this product to successfully enter the market! This module is fully compatible with GH-311 anti-theft module
2 Main technical parameters:
1 : Operating voltage: DC5V 2 : Quiescent current: less than 2mA
3 : Level output: high 5V 4 : Level output: bottom 0V
5 : Sensing angle: no more than 15 degrees 6 : Detection distance: 2 cm -510cm _
7: High precision: up to 0.3cm
On-board wiring methods, VCC, trig (control terminal), echo (receiving terminal), out (empty pin), GND
The OUT pin is the switching output pin when this module is used as an anti-theft module. This pin is not used in the ranging module!
Note: The module should be plugged into the circuit board first and then powered on to avoid high-level malfunction. If it occurs, it can be solved by repowering it.
This module can provide ranging programs: C51, PIC18F877 , Yilong microcontroller, three kinds of MCU test reference.
3. Working principle of URF04 module:
(1) Use IO trigger ranging and give a high-level signal of at least 10us;
(2) The module automatically sends 8 40khz square waves and automatically detects whether there is a signal returned;
(3) When a signal returns, a high level is output through IO. The duration of the high level is the time from emission to return of the ultrasonic wave.
Test distance = (high level time * speed of sound (340M/S))/2;
This product is simple to use. A control port sends a high level of more than 10US , and you can wait for the high level output at the receiving port. As soon as there is an output, you can start the timer, and when the port becomes low level, you can read The value of the timer is now the time of this ranging measurement, and the distance can be calculated. With such continuous periodic measurement, you can reach the value of your mobile measurement~~
(1) Use IO trigger ranging and give a high-level signal of at least 10us;
(2) The module automatically sends 8 40khz square waves and automatically detects whether there is a signal returned;
(3) When a signal returns, a high level is output through IO. The duration of the high level is
The time from emission to return of ultrasonic waves. Test distance = (high level time * speed of sound (340M/S))/2;
This module can provide a full set of ranging programs: C51 , PIC18F877, ultrasonic LCD1602 display, ultrasonic LCD12864 display, digital tube display, serial port display, etc., ranging reference program .
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