Twelve-lead electrocardiogram data acquisition card based on FPGA technique

Abstract

The invention provides a 12-lead electrocardiogram data acquisition card which relates to a medical device. The electrocardiogram acquisition card adopts hardware description language programming, such as VHDL and so on, to realize the selection and the control of the 12-lead electrocardiogram acquisition, the A / D conversion, the control of sampling rate, the filtering process of the electrocardiogram data, the sensitivity control and the data storage and transmission by FPGA. A general control module controls lead signals output by a sensitivity control module to an A / D conversion and control module to carry out the sensitivity detection and controls the lead signals after the sensitivity is detected by a data processing module to carry out the filtering process; a lead falling-off detecting part judges whether the lead falls off or not according to lead falling-off signals; a data transmission module receives a control instruction sent by an upper computer and transmits the lead signals processed by filtering into the upper computer. The data acquisition card improves the integration degree of a circuit and reduces the use amount and the volume of a resistor largely, thereby reducing the power consumption greatly, saving the cost and improving the interference immunity.

Description

Technical field [0001] The invention relates to a medical device, in particular to a twelve-lead electrocardiogram data acquisition card. Background technique [0002] The existing 12-lead ECG ECG data acquisition and data transmission circuit basically adopts multi-chip selector integrated circuits, decoder integrated circuits, counter integrated circuits, single-chip main control chips, serial communication circuits, and WILSON resistor networks. Right leg drive circuit, filter circuit, etc. realize twelve-lead selection, lead-off and sensitivity control, signal filtering, acquisition circuit and data transmission circuit are more complex, and the analog circuit components are more. As a result, the 12-lead electrocardiograph has the disadvantages of large size, high power consumption, difficulty in zero-cost maintenance and upgrading, and inability to realize real-time synchronization of data acquisition and data digital processing on the acquisition card. After searching, the...

AI Technical Summary

Problems solved by technology

[0002] The ECG data acquisition and data transmission circuit of the existing twelve-lead electrocardiogram is basically through a multi-chip selector integrated circuit, a decoder integrated circuit, a counter integrated circuit, a single-chip microcomputer main control chip, a serial communication circuit, and a WILSON resistor network. The right leg drive circuit, filter circuit, etc. realize 12-lead selection, lead-off and sensitivity control, signal filtering, acquisition circuit and data transmission circuit are relatively complex, and there are many analog circuit components

As a result, the 12-lead electrocardiograph has the disadvantages of large volume, high power consumption, difficulty in zero-cost maintenance and upgrade, and the inability to realize real-time synchronization of data acquisition and data digital processing on the acquisition card.

After retrieval, the use of FPGA technology to realize the ECG data acquisition and data processing and transmission technology of twelve-lead ECG has not been reported at home and abroad so far.

Images