Bipolar automatic electrostimulator. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Medicine
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I offer a bipolar automatic electrostimulator, with which you can perform electropuncture procedures in automatic mode not only with unipolar [1-3], but also with bipolar impulses. In this case, there is no need to swap the passive and active electrodes and it becomes possible to alternate the impact with high and low frequency pulses almost simultaneously (4 options for such an impact are provided by different positions of the switches SA1 and SA3).
The automatic electrostimulator (Fig. 1) contains two RC stimulating pulse generators (based on transistors VT1, VT3 and VT2, VT4, respectively), a power pulse modulator on a DA1 chip, light and sound indicators (HL1 HL2, BF1), passive and active electrodes.
Rice. 1 (click to enlarge)
To explain the operation, Fig. 2 shows the timing diagrams of the device operation.
Fig. 2
If you correctly set the sensitivity threshold of RC generators (resistors R7 and R10), they start working only when the active electrode touches the biologically active point (BAP), the electrical resistance of which is usually much less than that of other points of the body. The frequency of stimulating pulses of positive polarity is regulated by resistor R1, negative polarity - by resistor R6. The frequency of power pulses (amplitude modulation) is regulated by resistor R15. Switches SA1 and SA3 select the frequency ranges of stimulating pulses (HF or LF). Light indication of the operation of RC generators is provided by the circuit R11, HL1 and R12, HL2, respectively. The piezoelectric element BF1 is intended for sound signaling. The circuit of the device, with proper assembly and serviceable elements, does not need to be adjusted, however, during operation, adjustment of the sensitivity threshold is required.
Switch SA2 electrostimulator can be switched on in the mode of constant generation of pulses, and in this mode it can be used for therapy with pulses of infrared radiation, if infrared emitters are connected in parallel to the circuits R11, HL1 and R12, HL2, for example, such as in [4]. In addition, the electrostimulator can be supplemented with a pointer indicator of the electrical stimulation current (preferably with a scale of 100-0-100 μA), and in this case it can be used for diagnostics according to the Voll method [5], if the period of the power pulses (amplitude modulation) is set to 5 s and more. Moreover, I suppose that any BAP can have asymmetry of the readings of the dial indicator relative to zero when alternating positive and negative bursts of pulses, which is especially noticeable in the presence of any pathology.
Perhaps experimentally it will be possible to supplement and modernize the diagnostics by the Voll method, and thus verify the author's assumption that such asymmetry of BAP is additional information about the state of health of a particular organ. Diodes connected in parallel to the dial indicator protect the latter from overload when the probes are short-circuited, but if a dial indicator with built-in protection is used, then you can do without them. The electrostimulator can also be supplemented with frequency modulation if sawtooth voltage pulses are applied to the collectors VT1 and VT2 synchronously with the pulses of the power modulator.
Literature
- Boroday V.D. Electro-acupuncture stimulators // Radio amateur-1995 - No. 8
- Borodai V. D. Idle circuit of an electroacupuncture stimulator // Radioamator-1996- No. 6
- Boroday V. D. A simple electroacupuncture stimulator // Radio -1998- No. 3
- Borodai V. D. Radiate for health // Radio - 1996 No. 1
- Lupichev N. L. Electroacupuncture diagnostics homeopathy and the phenomenon of long-range action, - M NPK Ikarus, 1990
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