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Evaluation and Demonstration Boards and Kits

Evaluation and demonstration boards and kits enable users and evaluators to investigate the functionality of a particular technology before making a decision about purchasing or further development. The LE71HR8820G is an example of this type of board and kit, which is designed to offer a convenient and economical way for users to understand how the technology works and assess its performance in real-world conditions.

LE71HR8820G Application Field and Working Principle

LE71HR8820G is a comprehensive evaluation board specifically designed to evaluate and demonstrate the features and performance of monolithic HC-SR04 ultrasonic transducers manufactured by STMicroelectronics. It is powered by a PIC microcontroller, MCU family, and has all necessary external components to give users convenience and flexibility for their evaluation.

The LE71HR8820G board includes two pairs of HC-SR04 transducers, one for transmitting ultrasonic waves and the other for receiving the reflected waves. The microcontroller synchronizes the operation of the transmitter and receiver pairs by triggering them simultaneously. Once triggered, the microcontroller then evaluates the time difference between the rising edge of the signal sent by the transmitter and the rising edge of the signal received by the receiver. This time difference is used to calculate the distance from the transmitter to the object located in front of the receiver.

The ultra-sonic waves that have been generated on the transmitter propagation towards the object and are subsequently reflected back to the receiver. After the reflected signal reaches the receiver, the LE71HR8820G board measures the time difference between the transmitted and received signal and then calculates the distance from the transmitter to the object using the well-known formula d = (v·t)/2. Here, v is the speed of sound and t is the time taken for the sound to travel from the transmitter to the object and back to the receiver.

The LE71HR8820G board includes several additional features, such as automatic gain control, temperature compensation, and self-calibration. Automatic gain control regulates the receiver gain to optimize the signal-to-noise ratio. The temperature compensation feature helps to ensure accurate distance measurements by automatically adjusting the receiver gain based on the ambient temperature. The self-calibration feature allows users to manually adjust the conversion gain of the distance measurement, making the board suitable for measuring distances over a wider range.

The LE71HR8820G board can be used in a variety of applications, including obstacle sensing, robotic navigation, and distance testing. Hotels, hospitals, and offices can use the board to gauge the distance between people and obstacles and prevent accidents. The board can also be used in industrial and automotive settings to measure the gap or distance between objects. Finally, the board can be used for testing and automation of processes in laboratories or manufacturing plants.

Benefits and Features of the LE71HR8820G

The LE71HR8820G board offers users convenience and flexibility for their evaluation by incorporating a range of features and advantages. The board is easy to use and offers an effortless setup and quick evaluation. It also offers accurate distance measurements with a range of 0.3 m to 3 m. Furthermore, the temperature compensation and self-calibration features help to ensure optimal accuracy in different conditions. Other features of the board include a compact form factor, low power consumption, a wide range of external components, and the ability to be integrated with other systems.

The LE71HR8820G board is highly reliable and offers users reliable performance in a wide range of applications. Its small form factor makes it ideal for use in space-constrained environments. Additionally, the board is also EM CFR compliance and has passed key CE and FCC certification tests. This ensures that the board is safe to use in operational areas and won’t interfere with other electronic devices.

Conclusion

The LE71HR8820G evaluation board and kit provides an ideal platform for users to understand and assess the performance of monolithic HC-SR04 ultrasonic transducers. With its convenience, flexibility, and highly reliable performance, the board offers a great solution for evaluation and demonstration of the technology in various applications.

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