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Project title: Bracelet for recording biomechanical parameters
Type of cooperation: One-time project
Section: Mobile app development
Prepayment: prepayment is possible
Payment methods: Cash, Bank transfer, Electronic money
Acceptance of requests: from 2023-01-07 until 2023-01-22
Type of cooperation: One-time project
Section: Mobile app development
Prepayment: prepayment is possible
Payment methods: Cash, Bank transfer, Electronic money
Acceptance of requests: from 2023-01-07 until 2023-01-22
Project description:
Offering remote work. It is necessary to develop a bracelet for recording biomechanical parameters. The purpose of the device under development is to register the change in position (movement in one plane) of the pyloid process of the ulnar bone in the process of producing rotational movements of the forearm.
Description of the research procedure. The forearm is in a horizontal position, the elbow joint is bent at an angle of 90 degrees, the hand is compressed into a fist, the position of the latter is vertical (the thumb at the top). That's the starting point. During the study, the subject produces rotational movements with the forearm in the maximum possible amplitude from the maximum internal rotation to the maximum external rotation. Movements are made at an arbitrary pace in the amount from 5-7 to 15-20. The total time of registration can vary from 15 to 60 seconds.
Recorded parameters (minimum): angle of rotation of the forearm, movement of the pyloid process (linear).
The frequency of registration of any of the parameters is at least 100 Hz.
Resolution of the angle recorder of not less than 0.5 degrees
Resolution of the registrar of movements - 0.05 mm
Transfer data synchronously over the Bluetooth channel.
The type of device is autonomous with its own power from a rechargeable or replaceable battery.
The variant of the device is a bracelet on the wrist. Technical performance of the bracelet can be different, it is possible to use the products available on the market. Critical: the possibility of sanitary treatment (preferably plastic), the possibility of accurate adjustment when installed on the subject - a tight landing. In the bracelet itself or on it is mounted an electronic unit containing:
• Power supply battery (tablet or other type)
• Fees comprising the following devices:
Programmable processor for working with all devices
O Bluetooth low energy chip
O inertial chip (three-component accelerometer and three-component gyroscope)
O Analog (most likely) channel for working with a linear motion sensor. It is possible that there are sensors that are primarily digital or with digitization inside.
O ADC for digitization of linear movement sensor data
What are the battery connectors, processor access???
• The linear motion sensor, which must be installed in a certain way (depending on the type of sensor) is mounted in the bracelet.
Remark! The type of linear displacement sensor is not yet clear. We need to pick him up. Some technical parameters of the sensor:
• Linear movement within 0-5 mm (it is possible that a reserve of up to 8 mm is needed)
• Resolution of the registrar of movements within the range of 0.01-0.05 mm
Possible support frequency up to 100 Hz (i.e. Hysteresis, if any, should not interfere with
• Food - low-voltage
• Within the measured displacements, the pressure of the sensor plunger, which will be based on the punctuated process of the ulnar bone, should be a constant.
• Weight and dimensions – allowing installation on the bracelet
Software for Android or Windows OS. The PO assumes the following functions:
The simplest browser for entering the name and year of birth of the subject (as well as searching for these parameters to download and view the research result)
• The actual body of the program:
Bluetooth connection to the device (bracelet)
Visualization of recorded data in oscilloscope mode
O Zero data (the initial position is taken as zero and on the angle and on the movement).
O Data Registration (start-stop buttons)
o Possibility of setting a constant registration time within 15-120 seconds
Formation of the final report:
Average graphs per cycle of movement
● cycle of motion in seconds with hundredths of a share
Maximum and minimum amplitude for each graph with a maximum and minimum phase. For this purpose, the duration of each cycle is taken as 100% when summed up and the phase is indicated as %.
O Preservation of study data
O Resetting data from each study in ASCII codes (table having the following columns: phase of the driving cycle (resolution 1%), angle data, movement data.
• Service functions for calibrating the inertial chip and the displacement sensor may be needed. This is solved by determining a specific type of device (precalibrated inertial sensors can be used without calibration).
Offering remote work. It is necessary to develop a bracelet for recording biomechanical parameters. The purpose of the device under development is to register the change in position (movement in one plane) of the pyloid process of the ulnar bone in the process of producing rotational movements of the forearm.
Description of the research procedure. The forearm is in a horizontal position, the elbow joint is bent at an angle of 90 degrees, the hand is compressed into a fist, the position of the latter is vertical (the thumb at the top). That's the starting point. During the study, the subject produces rotational movements with the forearm in the maximum possible amplitude from the maximum internal rotation to the maximum external rotation. Movements are made at an arbitrary pace in the amount from 5-7 to 15-20. The total time of registration can vary from 15 to 60 seconds.
Recorded parameters (minimum): angle of rotation of the forearm, movement of the pyloid process (linear).
The frequency of registration of any of the parameters is at least 100 Hz.
Resolution of the angle recorder of not less than 0.5 degrees
Resolution of the registrar of movements - 0.05 mm
Transfer data synchronously over the Bluetooth channel.
The type of device is autonomous with its own power from a rechargeable or replaceable battery.
The variant of the device is a bracelet on the wrist. Technical performance of the bracelet can be different, it is possible to use the products available on the market. Critical: the possibility of sanitary treatment (preferably plastic), the possibility of accurate adjustment when installed on the subject - a tight landing. In the bracelet itself or on it is mounted an electronic unit containing:
• Power supply battery (tablet or other type)
• Fees comprising the following devices:
Programmable processor for working with all devices
O Bluetooth low energy chip
O inertial chip (three-component accelerometer and three-component gyroscope)
O Analog (most likely) channel for working with a linear motion sensor. It is possible that there are sensors that are primarily digital or with digitization inside.
O ADC for digitization of linear movement sensor data
What are the battery connectors, processor access???
• The linear motion sensor, which must be installed in a certain way (depending on the type of sensor) is mounted in the bracelet.
Remark! The type of linear displacement sensor is not yet clear. We need to pick him up. Some technical parameters of the sensor:
• Linear movement within 0-5 mm (it is possible that a reserve of up to 8 mm is needed)
• Resolution of the registrar of movements within the range of 0.01-0.05 mm
Possible support frequency up to 100 Hz (i.e. Hysteresis, if any, should not interfere with
• Food - low-voltage
• Within the measured displacements, the pressure of the sensor plunger, which will be based on the punctuated process of the ulnar bone, should be a constant.
• Weight and dimensions – allowing installation on the bracelet
Software for Android or Windows OS. The PO assumes the following functions:
The simplest browser for entering the name and year of birth of the subject (as well as searching for these parameters to download and view the research result)
• The actual body of the program:
Bluetooth connection to the device (bracelet)
Visualization of recorded data in oscilloscope mode
O Zero data (the initial position is taken as zero and on the angle and on the movement).
O Data Registration (start-stop buttons)
o Possibility of setting a constant registration time within 15-120 seconds
Formation of the final report:
Average graphs per cycle of movement
● cycle of motion in seconds with hundredths of a share
Maximum and minimum amplitude for each graph with a maximum and minimum phase. For this purpose, the duration of each cycle is taken as 100% when summed up and the phase is indicated as %.
O Preservation of study data
O Resetting data from each study in ASCII codes (table having the following columns: phase of the driving cycle (resolution 1%), angle data, movement data.
• Service functions for calibrating the inertial chip and the displacement sensor may be needed. This is solved by determining a specific type of device (precalibrated inertial sensors can be used without calibration).
