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 relative

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