Ultrasonic distance measurement module
High precision/small blind spot/secondary development
Product Parameters
| Operating voltage: DC5V |
Product Features:
◆The professional ultrasonic module has stable performance, high accuracy, small blind spots, fast feedback speed, high market penetration rate, and can be comparable to foreign ultrasonic ranging modules such as SRF05 and SRF02.
◆The high precision of the module, close to the blind spot (2cm), and stable distance measurement are the powerful basis for the successful entry of this product into the market!
◆This module is compatible with GH-311 anti-theft module.
◆This module is suitable for conducting microcontroller experiments and its presence is often seen on smart cars.
Functional diagram
+5V—— |
|
Definition diagram of sensor interface | |
Precautions
The TRIP pin is an internal resistor that pulls up 10K. Use the IO port of the microcontroller to pull down the TRIP pin and then provide a pulse signal of 10us or more. The OUT pin is the output pin for the switch value when using this module as an anti-theft module, and this pin is not used for the distance measurement module!
The module should be plugged into the circuit board before being powered on to avoid high-level misoperation. If it occurs, it can only be resolved by re powering on.
Application Examples
Multiple smart cars can use this ultrasonic module for distance measurement and obstacle avoidance experiments
Connection method
Connect the ultrasonic module and the development board using DuPont wire, and ensure that the silk screen markings on the ultrasonic module correspond one-to-one with those on the Small R Technology development board, VCC-5V、Trig-Trig、Echo-Echo、Gnd-GND.
Module working principle
1. Using I0 triggered ranging to provide a high-level signal of at least 10US;
2. The module automatically sends 8 40KHZ square waves and detects whether there is a signal return;
3. There is a signal returning, and a high level is output through IO. The duration of the high level is the time from the emission to the return of the ultrasonic wave, and the test distance=(high level time * sound speed (340M/S))/2.
This product has a simple usage method. If a control port sends a high level of more than 10US, you can wait for the high level output at the receiving port As soon as there is an output, the timer can be started to count. When this port becomes low, the timer value can be read, which is the time for this distance measurement and the distance can be calculated By continuously measuring the cycle, you can achieve the value of your mobile measurement~~
Shipping List
Ultrasonic module+ultrasonic mount 4P DuPont Line
