Distributed Wireless Electromyography
Last updated
Last updated
Use the provided router. Connect your computer to the router using an Ethernet cable. For the connection between the computer and the router (LAN port), please use a wired connection. Authentication and password input may be required during the initial connection.
Apply medical-grade double-sided adhesive to the sensor and turn on the sensor to activate it. The medical-grade adhesive comes in high and low adhesion options. High adhesion may leave more residue on the sensor, while low adhesion leaves less. When removing residue, use an eraser to clean and wipe with an alcohol pad. Do not submerge the device in water or disinfectant, and avoid using corrosive cleaning agents.
Open the "EMGx2Server" folder. Within the folder, double-click on "EMGx2Server" (16.2.2.1). Wait for the sensor to connect. Once successfully connected, the sensor's name will change from gray to a selectable state, indicating a successful connection (16.2.2.2). Consult a technical engineer to obtain the "EMGx2Server" file.
In EMGx2Server, keep the server IP and port at their default settings and avoid making any changes. If the server status is showing as closed, simply click on "Open" to activate it.
In the XingYing software, click on the menu bar "Third-party Devices" and then select the "Channel Configuration" window. This window is used to configure channels for the data acquisition device. Please make sure that the number of channels you add matches the maximum number of channels supported by the actual data acquisition device. For example, if the wireless electromyography (EMG) enables two channels - EMG-IMU-1 and EMG-IMU-6, you will need to configure channels 1 to 6 in XingYing, totaling 6 channels. These channels should be enabled in sequential order. Currently, the software does not support arbitrary channel combinations for use. See the diagram below for reference.
After adding the channels, you can select the corresponding measurement range based on the wireless electromyography device. Once you have made your selection, check the box in front of each channel to enable them.
Close the channel configuration window, and in the "Third-party Devices - Force Platform Parameters Settings" window, check the option for "Digital EMG (Network)."
Click on the "Connect" button below to connect the camera and start playing. This will enable synchronized data acquisition of electromyography and motion capture data.
Switch the 3D view to the analog chart. Right-click on the chart and select "Edit Page." In the "Channel Configuration" window, click on "Channels" to select all channels, enable adaptive mode. You will now be able to see real-time data and waveform from the data acquisition device displayed in the analog chart. This way, the analog chart will display electromyography data and its waveform.
When using digital electromyography, you can set the acquisition multiplier. The default multiplier is 1, which means the electromyography frequency is synchronized with the motion capture frequency. However, you can adjust this according to your needs. The digital electromyography supports a maximum capture frequency of 1000fps. The calculation for the sampling frequency is Sampling Frequency Value = Frame Rate Multiplier × Frame Rate.
To set the multiplier, you can input the frame rate multiplier below the channel sampling frequency on the "Third-party Devices - Force Platform Parameters Settings" page, with the camera disconnected. After entering the multiplier value, press Enter for the settings to take effect. Then reconnect the camera and start playing to apply the changes.
Please note that before using "EMGx2Server," connect your computer to the provided router's WiFi. Do not change the network settings in the "EMGx2Server" window; keep them at default settings. Avoid running multiple instances of the "EMGx2Server" program, as this can lead to port occupation issues that prevent the detection of sensors. Once you have connected to the sensors, you can minimize the program. After connecting to all sensors, in the second column of the "Channel Selection," make sure to check "EMG-CH1" for each sensor (16.2.2.3).
