A distributed wireless high-density surface electromyography synchronous acquisition system, comprising high-density electromyography front-end acquisition control units, a base station unit and a host computer, wherein data is transmitted between the high-density electromyography front-end acquisition control units and the base station unit through a wireless system;
- each high-density electromyography front-end acquisition control unit comprises a high-density electromyography acquisition array, a reference electrode and a signal transmission module;
- the base station unit comprises a synchronization control module, a wireless routing module and a charging and discharging module;
- the host computer is a client computer program, which is loaded with a signal preprocessing and display module and a high-density electromyography decoding algorithm module;
- and information received from the base station unit is acquired and analyzed and results are displayed by a client;
- when used, the reference electrode is moistened and fixed to a skeletal muscle tendon of a human body, the high-density electromyography acquisition array is attached to a skeletal muscle belly of the human body, and the reference electrode and the high-density electromyography acquisition array are connected with the signal transmission module, respectively;
- after an acquisition instruction is issued by the host computer, the instruction is analyzed by the base station unit to control the high-density electromyography front-end acquisition control units to start working;
- skin surface electromyograms are transmitted to the signal transmission module by the high-density electromyography acquisition array, signals in the same time period are packaged by the signal transmission module and sent to the base station unit, signals transmitted by multiple high-density electromyography front-end acquisition control units are integrated by the base station unit and transmitted to the host computer through a data line in real time;
- and files are displayed and stored by the host computer;
- wherein the signal transmission module comprises a high-density electromyography acquisition array connector, an electromyogram processing chip, a microprocessor, a six-axis acceleration sensor, a power supply control module and a battery module;
- the high-density electromyography acquisition array is connected by the high-density electromyography acquisition array connector to transmit original electromyograms to the signal transmission module;
- the electromyogram processing chip is used for amplifying and sampling, bandpass filtering and analog-to-digital conversion of the electromyograms;
- the microprocessor adopts a CC3235S chip integrated with a dual-band Wi-Fi low-power 5G communication chip to conduct multi-channel data integration of received high-density electromyograms and acceleration signals and real-time control of synchronization signal transmission, and finally realize lossless data processing and low-power data communication;
- a three-axis acceleration sensor and a three-axis gyroscope are integrated in the six-axis acceleration sensor to obtain motion data during human body electromyography data acquisition;
- and the power supply control module and the battery module are used for supplying power to the high-density electromyography front-end acquisition control units and protect the high-density electromyography front-end acquisition control units from electrical underload or overload, and a low voltage difference linear voltage regulator circuit is designed to reduce background noise in the electromyograms;
- the skin surface electromyograms are transmitted to the signal transmission module by the high-density electromyography acquisition array and converted into digital signals with a resolution of 24 bits by the electromyogram processing chip;
- and the acceleration signals are transmitted to the microprocessor by the six-axis acceleration sensor, the high-density electromyograms and the acceleration signals are simultaneously received by the microprocessor, and the signals in the same time period are packaged and sent to the base station unit.