High-voltage electric pulse tumor treatment instrument controller based on DSP+CPLD framework

Abstract

The invention provides a high-voltage electric pulse tumor treatment instrument controller based on a DSP+CPLD framework, and belongs to the technical field of surgical operation robots. A DSP 28335 is adopted by a controller top layer as a main control unit to be responsible for the controlling of whole treatment procedures, CPLD is adopted as an auxiliary control unit to be responsible for an IOinterface of expanding DSP, and a driving impulse with adjustable impulse width, pulse frequency and pulse amount can be generated in the CPLD logically. A bottom layer comprises an analog signal output circuit, an analog signal input circuit, a digital signal input circuit and a digital signal output interface circuit, and electrical isolation is adopted by all of the circuits. Different power supplies are adopted on both sides of a photoelectric coupling member to supply power, and noise crosstalk between the power supplies of the digital circuits and the analog circuits is inhibited through inductance. According to the controller with the above modules, the demand of a controlled object on multiple input and output signals is met, and the controller has extremely high anti-interferencecapability.

Description

technical field [0001] The invention belongs to the technical field of surgical robots, and in particular relates to a controller of a high-voltage electric pulse tumor treatment instrument based on a DSP+CPLD architecture. Background technique [0002] High-voltage electric pulse tumor therapy instrument is a new type of cancer treatment instrument. High-voltage electric pulse ablation is also called "nano-knife". It releases high-voltage electric pulses to the lesion area to induce irreversible electroporation and apoptosis of cells to achieve tumor inactivation. , which has the advantages of less thermal damage and short treatment cycle, has become one of the great hopes for curing cancer. The high-voltage electric pulse tumor therapy instrument used in the current research usually uses a capacitor bank as an energy storage device, an IGBT as a high-voltage switch of the pulse generating unit, and other isolation switches such as relays may be introduced at the same time....

AI Technical Summary

Problems solved by technology

[0008] Chinese patent CN102882493B provides a control scheme for a pulse generator, which uses an FPGA module as a controller for pulse generation, but the controller sends a control sequence to the pulse generator in one direction without receiving feedback

[0009] Chinese patent CN202548609 provides a scheme for the overall architecture of the controller and an analog output and analog detection scheme, which uses ARM as the console architecture, controls the analog output through an external digital-to-analog conversion chip (DAC), and controls the analog output through an external analog-to-digital conversion chip ( ADC) converts the analog feedback feedback. This solution is extremely unstable in a high-voltage interference environment. ADCs and DACs are very prone to failures that cause the system to stop working

[0010] The treatment environment of high-voltage electric pulse therapy determines that the controller will work in an environment with great noise interference. Some existing solutions that directly integrate the control part and the high-voltage electric pulse generation part are not conducive to the safety of the equipment. stable job

Images