Depth Water Measurement Device Using a Piezoelectric Sensor -- 2
Budget: $3,000 – $5,000 USD
Project Overview
The objective of this project is to develop a device for measuring depths greater than 50 meters. The main tasks of the device are to:
Acquire the signal from a piezoelectric sensor, which receives pulses reflected from the bottom or obstacles.
Convert the analog signal from the sensor into a digital format using an ADC (Analog-to-Digital Converter).
Transmit the digital data via an RX/TX communication interface, implemented using an FTDI chip (e.g., FT232R), to a host system (such as a computer or another microcontroller).
Advanced signal analysis (e.g., distance calculation) is not required—the device is only responsible for data conversion and transmission.
Functional Requirements
Sensor Interface
The device shall be equipped with a piezoelectric sensor capable of detecting pulses reflected from the bottom or obstacles at depths greater than 50 m.
The sensor captures the signal, which is then converted into an electrical signal.
Signal Conversion
The analog signal from the sensor must be converted into a digital format.
The device will utilize an ADC to perform the signal conversion.
The conversion process must be reliable, even with low signal levels typical for such measurements.
Communication via RX/TX Interface (FTDI)
The device shall include a communication module for data transmission.
The communication interface will be implemented using an FTDI chip (e.g., FT232R), which converts the UART signal to USB or another compatible interface, enabling data transmission via RX/TX lines.
After conversion to digital form, the data should be formatted as a packet or text, compliant with the chosen communication standard, and then transmitted to the host system.
Power Supply and Operating Environment
The project must account for the device operating in an environment with depths greater than 50 m. This implies that the sensor and the entire system must maintain proper performance and signal integrity.
The device must be robust and capable of operating in harsh environmental conditions, such as those encountered underwater or in marine environments.
Simplicity of Design
Signal analysis (e.g., time-of-flight calculations or signal filtering) is not required.
The focus is on accurate data acquisition from the sensor, its conversion into digital format, and reliable transmission via the communication interface (RX/TX using FTDI).
Hardware Requirements
Microcontroller (e.g., STM32H)
A preferred processor is the STM32H, which features an integrated ADC with appropriate resolution and communication interfaces.
The microcontroller must be compatible with the piezoelectric sensor and capable of handling the data conversion process.
Sensor
The device will be equipped with a piezoelectric sensor, tailored for depth measurements beyond 50 m.
Power Supply
The device should have a stable power source suitable for operation in underwater or remote environments (e.g., battery power or a regulated power supply).
Connectivity
A communication interface based on RX/TX lines, supported by an FTDI chip, enabling data transmission to the host system.
Software Requirements
ADC Driver
The software must include routines for configuring and reading data from the microcontroller's ADC (e.g., STM32H).
Communication Driver
Implementation of communication routines responsible for formatting and transmitting data via the RX/TX interface.
The communication is to be implemented using an FTDI chip, which converts the UART signal to an interface compatible with the host system (e.g., USB).
Data Formatting
The raw data acquired from the ADC should be encapsulated in a defined format (e.g., binary or ASCII) so that the host system can correctly interpret it.
Minimal Processing
Since advanced signal analysis is not required, the software should focus on rapid and efficient data acquisition and transmission, minimizing the delay between data reading and transmission.
Code Comments
All comments in the source code must be written in English.
Deliverables
Hardware Design
Schematics and PCB layout files for the device.
A Bill of Materials (BOM) listing all required components, including the microcontroller (e.g., STM32H), the piezoelectric sensor, the power module, and the FTDI chip.
Firmware
Complete source code for the microcontroller firmware, including:
Initialization and data acquisition from the ADC.
Initialization of the RX/TX communication interface and data transmission using the FTDI chip.
All code comments must be in English.
Summary
The device is intended for measuring depths beyond 50 meters by:
Acquiring data from a piezoelectric sensor.
Converting the analog signal to digital form using an ADC (integrated within a microcontroller such as the STM32H).
Transmitting the converted data via an RX/TX communication interface, implemented using an FTDI chip, to the host system.
Advanced signal analysis is not required—reliable data acquisition and transmission are the key objectives. Please review the above specifications and provide any questions or proposals regarding the implementation of this solution.
I look forward to receiving your offer and a detailed implementation plan.
Below is a list of skills the freelancer must possess to successfully complete this project:
Embedded Systems Design
Experience in designing and developing embedded systems, including interfacing sensors, ADC configuration, and data acquisition.
Microcontroller Programming (STM32 or Similar)
Proficiency in programming microcontrollers such as the STM32H series. Familiarity with setting up ADC modules and handling real-time data processing is essential.
Firmware Development in C/C++
Ability to write well-documented, efficient firmware code with clear comments in English. Experience in configuring communication interfaces (e.g., UART) is required.
PCB Design and Schematic Capture
Proficiency in designing PCB schematics and layouts, including selecting appropriate components (microcontroller, sensor, power modules, FTDI chip) and ensuring robust hardware design for operation in challenging environments.
Signal Acquisition and Data Formatting
Understanding of signal acquisition from sensors and the processes involved in converting analog signals to digital data. Experience in formatting data for transmission and ensuring minimal processing delays.
Power Supply and System Robustness
Familiarity with designing power supply circuits for devices operating in remote or harsh environments, ensuring stable and reliable operation under underwater or similar conditions.
The objective of this project is to develop a device for measuring depths greater than 50 meters. The main tasks of the device are to:
Acquire the signal from a piezoelectric sensor, which receives pulses reflected from the bottom or obstacles.
Convert the analog signal from the sensor into a digital format using an ADC (Analog-to-Digital Converter).
Transmit the digital data via an RX/TX communication interface, implemented using an FTDI chip (e.g., FT232R), to a host system (such as a computer or another microcontroller).
Advanced signal analysis (e.g., distance calculation) is not required—the device is only responsible for data conversion and transmission.
Functional Requirements
Sensor Interface
The device shall be equipped with a piezoelectric sensor capable of detecting pulses reflected from the bottom or obstacles at depths greater than 50 m.
The sensor captures the signal, which is then converted into an electrical signal.
Signal Conversion
The analog signal from the sensor must be converted into a digital format.
The device will utilize an ADC to perform the signal conversion.
The conversion process must be reliable, even with low signal levels typical for such measurements.
Communication via RX/TX Interface (FTDI)
The device shall include a communication module for data transmission.
The communication interface will be implemented using an FTDI chip (e.g., FT232R), which converts the UART signal to USB or another compatible interface, enabling data transmission via RX/TX lines.
After conversion to digital form, the data should be formatted as a packet or text, compliant with the chosen communication standard, and then transmitted to the host system.
Power Supply and Operating Environment
The project must account for the device operating in an environment with depths greater than 50 m. This implies that the sensor and the entire system must maintain proper performance and signal integrity.
The device must be robust and capable of operating in harsh environmental conditions, such as those encountered underwater or in marine environments.
Simplicity of Design
Signal analysis (e.g., time-of-flight calculations or signal filtering) is not required.
The focus is on accurate data acquisition from the sensor, its conversion into digital format, and reliable transmission via the communication interface (RX/TX using FTDI).
Hardware Requirements
Microcontroller (e.g., STM32H)
A preferred processor is the STM32H, which features an integrated ADC with appropriate resolution and communication interfaces.
The microcontroller must be compatible with the piezoelectric sensor and capable of handling the data conversion process.
Sensor
The device will be equipped with a piezoelectric sensor, tailored for depth measurements beyond 50 m.
Power Supply
The device should have a stable power source suitable for operation in underwater or remote environments (e.g., battery power or a regulated power supply).
Connectivity
A communication interface based on RX/TX lines, supported by an FTDI chip, enabling data transmission to the host system.
Software Requirements
ADC Driver
The software must include routines for configuring and reading data from the microcontroller's ADC (e.g., STM32H).
Communication Driver
Implementation of communication routines responsible for formatting and transmitting data via the RX/TX interface.
The communication is to be implemented using an FTDI chip, which converts the UART signal to an interface compatible with the host system (e.g., USB).
Data Formatting
The raw data acquired from the ADC should be encapsulated in a defined format (e.g., binary or ASCII) so that the host system can correctly interpret it.
Minimal Processing
Since advanced signal analysis is not required, the software should focus on rapid and efficient data acquisition and transmission, minimizing the delay between data reading and transmission.
Code Comments
All comments in the source code must be written in English.
Deliverables
Hardware Design
Schematics and PCB layout files for the device.
A Bill of Materials (BOM) listing all required components, including the microcontroller (e.g., STM32H), the piezoelectric sensor, the power module, and the FTDI chip.
Firmware
Complete source code for the microcontroller firmware, including:
Initialization and data acquisition from the ADC.
Initialization of the RX/TX communication interface and data transmission using the FTDI chip.
All code comments must be in English.
Summary
The device is intended for measuring depths beyond 50 meters by:
Acquiring data from a piezoelectric sensor.
Converting the analog signal to digital form using an ADC (integrated within a microcontroller such as the STM32H).
Transmitting the converted data via an RX/TX communication interface, implemented using an FTDI chip, to the host system.
Advanced signal analysis is not required—reliable data acquisition and transmission are the key objectives. Please review the above specifications and provide any questions or proposals regarding the implementation of this solution.
I look forward to receiving your offer and a detailed implementation plan.
Below is a list of skills the freelancer must possess to successfully complete this project:
Embedded Systems Design
Experience in designing and developing embedded systems, including interfacing sensors, ADC configuration, and data acquisition.
Microcontroller Programming (STM32 or Similar)
Proficiency in programming microcontrollers such as the STM32H series. Familiarity with setting up ADC modules and handling real-time data processing is essential.
Firmware Development in C/C++
Ability to write well-documented, efficient firmware code with clear comments in English. Experience in configuring communication interfaces (e.g., UART) is required.
PCB Design and Schematic Capture
Proficiency in designing PCB schematics and layouts, including selecting appropriate components (microcontroller, sensor, power modules, FTDI chip) and ensuring robust hardware design for operation in challenging environments.
Signal Acquisition and Data Formatting
Understanding of signal acquisition from sensors and the processes involved in converting analog signals to digital data. Experience in formatting data for transmission and ensuring minimal processing delays.
Power Supply and System Robustness
Familiarity with designing power supply circuits for devices operating in remote or harsh environments, ensuring stable and reliable operation under underwater or similar conditions.
Related categories:
Embedded Systems
PCB Design and Layout
Signal Processing
STM32
Analog / Mixed Signal / Digital