A bipolar electric stimulation protection device

Abstract

The invention discloses a bipolar electrical stimulation protection device, which comprises a power supply circuit, an on-off control circuit, a differential amplification circuit, a current limiting regulating circuit and a comparator circuit, wherein the on-off control circuit realizes the sampling on signals and controls the output and the switching-off of stimulation signals, the differential amplification circuit amplifies the signals sampled by the on-off control circuit, the comparator circuit compares the sampling signals amplified by the differential amplification circuit to the voltage input by the current limiting regulating circuit, and the on-off control circuit switches off the output of the stimulation signals when the comparator circuit outputs high voltage. When a load (patient) carries out bipolar electrical stimulation, and the current flowing through the load (patient) exceeds a certain current value, the bipolar electrical stimulation signals are directly cut off, and in addition, the state is locked, so the output of the bipolar electrical stimulation is stopped, and the effective and safe protection is realized on the patient. The bipolar electrical stimulation protection device has the advantages that the structure is simple, the use is convenient, and the safety factor is high.

Description

technical field [0001] The invention relates to the technical field of bipolar electric stimulation equipment, in particular to a bipolar electric stimulation protection device. Background technique [0002] Electrical stimulation is a commonly used physical therapy method. At present, square wave electrical stimulation is commonly used. This is because the rise and fall rates of square wave current are extremely high, and the amplitude can reach the maximum stimulation value in an instant, and can also be reduced to zero. And the waveform rule of the square wave is not only beneficial to grasp the stimulus intensity, but also conducive to measurement and calculation. In the specific operation, the amplitude, width, string length, program and time interval of electrical stimulation can be adjusted at will. It can be used not only for skin pain measurement, but also for peripheral nerve and central nervous system measurement. In addition to pain, it can also produce numbness...

AI Technical Summary

Problems solved by technology

[0005]1. This kind of current overload protection circuit collects only one-way square wave, but now the electric stimulator outputs mostly positive and negative bipolar square wave stimulation signals , this kind of overcurrent protection circuit cannot collect bipolar current

[0006]2. The power supply of the current overload protection circuit is provided by an external power supply, and the reliability of the circuit will drop. If the external power supply is not normal, the protection circuit will not work normally

[0007]3. The protection circuit uses MOS tubes to cut off the current. This control method needs to keep applying a specific level on the MOS tubes. poor reliability

[0008]4. The protection circuit uses a current detection amplifier for current detection, which is expensive and complicated

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