Since the ultrasonic directivity, the energy consumption is slow, and the distance propagating in the medium is far, so ultrasonic waves are often used for distance measurements, such as rangefinders and position measuring instruments, etc., can be implemented by ultrasonic waves. Using ultrasonic testing is often relatively rapid, convenient, computational, easy to achieve real-time control, and can achieve industrial practical requirements in terms of measurement accuracy, so a wide range of applications.
1, reversing radar ranging alarm (ultrasonic sensor radar ranging)
Principle: The reversing radar is composed of ultrasonic sensors, probe motherboards, LED displays, and voice systems. When the car is reversing, the reverse radar automatically starts work, the ultrasonic sensor detects the distance between the car and obstacles, and the distance is displayed on the screen, and the voice rises or makes a buzzer alarm, help the driver understand the obstacle Information, auxiliary reversing.
https://www.cirmall.com/circuit/3438
2, ultrasonic ranging thousands of years
This design uses 1602 as a display, and has two functions of mergers and distance measurements. If you have a spare electron, the main power is powered down, the clock chip is still run, thus ensuring the accuracy of the time, distance measurement 5-150 cm It is more accurate. The minimum and maximum values for the long-year calendar clock and distance measurements can be adjusted by the board, and when the distance is less than the minimum or greater than the maximum value, the system generates an alert through the buzzer.
https://www.cirmall.com/circuit/7922
3, homemade ultrasonic ranging module
This ultrasonic module is my own homemade. The distance between the ranging can reach 6m. The precision is in 0.5cm. The open source hardware schematic and PCB also has the program source code. There are two versions to sell together. One is to use STM32F103 One is to do with the 8-bit microcontroller N76E003 (this single-chip Taobao price of 8 cents) in the new Tang, but the principle is the same. The program is very straightforward. After reading this information, you can do it yourself. An ultrasonic ranging module.
https://www.cirmall.com/circuit/11991
4, ranging 99 inches, MSP430 ultrasonic ranging instrument design (schematic, PCB source file, MSP430 firmware, etc.)
This design guide describes the working principle and basic design process of low-cost ultrasound ranging systems using MSP430 ultra-low power microcontrollers. The ultrasonic ranging reference design can measure the distance of up to 99 inches, with an accuracy of ± 1.5 inches. This design attachment content provides all related design documents, such as schematic, list of materials, MSP430 MCU firmware, etc., see "related files" download.
https://www.cirmall.com/circuit/6348
5, single-chip ultrasonic ranging instrument design
Function Description: The control chip uses an 89C51 single-chip microcomputer; uses the HC-SR04 high precision ultrasonic module, the accuracy can reach 4mm; use the LCD screen LCD 12864 to display the current distance and other information; when the measurement distance is less than the set value, the lighting alarm is performed. When it is greater than 168, the lighting alarm can only be set by the program, and this set value can be set by K1 on the ultrasonic module.
https://www.cirmall.com/circuit/865
6. Ultrasonic ranging circuit design based on STC15 microcontroller (using STC15 system chip + HC-SR04 ultrasonic module)
This design uses the STC15 series chip as the main controller, fast speed, good performance; use HC-SR04 ultrasonic module, on the one hand, the structure is simple, low, and low cost, on the other hand, the wave is propagated, which is easy to detect and calculate. The module is widely used in many aspects of avoidance, automobile reversing, and ranging; uses an OLED display as a display portion, OLED programming, strong operability, good transplantability, can display rich in content. In summary, this design is to calculate the distance from the obstacle by obtaining the emission of the ultrasonic module wave to the received time, and is displayed, set the minimum alarm distance, and can sound alarm, the expansion function is to perform a voice broadcast.
https://www.cirmall.com/circuit/16753
7, intelligent blind crutches design - ultrasonic surgical buzzer alarm
The smart blind crutant uses a 51 single-chip microcomputer, US-100 ultrasonic sensor measures the distance between the front obstacle, and is displayed by the digital tube, and the digital tube is 74HG573 driver. The honeyware can issue different frequencies of sound depending on the distance of different obstacles. There is a photosensitive resistance test during the day and night, and the black controls a relay to control the flash.
https://www.cirmall.com/circuit/7217
8, ultrasonic ranging system DIY design based on STC89C52 single-chip microcomputer (data and physical)
The ultrasonic module HC-SR04 measured the current barrier distance, transmitted to the STC89C52 single chip, the STC89C52 single chip is used as a core processor, and the current distance value is displayed by 1602 liquid crystal. This ultrasonic ranging system measures the maximum distance of 7m, which accurate can be accurate to 1 cm, and the error is within 1 cm. When the most recent distance is exceeded, the buzzer issues an alarm.
https://www.cirmall.com/circuit/930
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