In principle there are several types:
1. Beep-type electro-acupuncture instrument is a use of bell oscillation principle, the DC current into pulse current. This pulse current waveform is narrow, such as needle-like, and asymmetric. As the power consumption, noise, and now rarely used.
2. Step-down ac acupuncture instrument is a general commercial AC power supply, the transformer will be reduced to 25V voltage below, and then by the resistance and the potentiometer to be regulated output, in order to obtain the appropriate stimulus intensity. As the frequency is not adjustable, and now rarely used.
3. Audio Oscillator is a use of audio frequency oscillator, in the 20 ~ 200Hz range, resulting in adjustable frequency sine wave electro-needle instrument, although the frequency and output intensity can be adjusted, but the waveform is simple, less effective. This electro-acupuncture instrument is currently rarely used.
4. Transducer noise electro-acupuncture instrument The power of the instrument is DC 6V, the noise frequency is 15000 ~ 20000Hz, the modulation frequency is 3 ~ 30Hz, the output voltage is 0 ~ 50V. E1332 electro-acupuncture instrument that is of this type, mainly for acupuncture anesthesia and analgesic treatment.
5. Acoustic electro-acupuncture needle that is generated by the sound generator, a variety of sound sources, such as music, drama, songs, radio and other acoustic input electro-acupuncture instrument, the output through the wire and acupuncture points linked to acupuncture , Resulting in a complex, uneven, random transients of the composite acoustic wave stimulation, it is not easy to cause the body's adaptability, so that the role of long-term treatment does not decay. Because there is no strong fundamental interference, stimulation is more comfortable patients easy to accept. Acoustic current is better than general pulse wave analgesic effect.
6. Pulse electro-acupuncture instrument in recent years, the most widely used at home and abroad. The use of intermittent oscillator for the pulse generator, variable resistor circuit by changing the time constant, the control pulse frequency. There are several sets of isolated output windings on the oscillating transformer. The output of the auxiliary winding is output by the potentiometer. By the multi-harmonic oscillator output square wave, can be intermittent wave and pulse wave mode. However, the frequency of these two waveforms is not adjustable, square wave generated fluctuation signal can modulate its amplitude, wave and sawtooth wave can be obtained such as pulse wave. It is characterized by constant current symmetry and is available with transcutaneous electrodes.
The output number of different ways can be divided into two-way electro-acupuncture instrument, four-way needle instrument, six-way electro-acupuncture instrument, ten-way electro-acupuncture instrument, twelve-way instrument; ; According to the output waveform types can be divided into two kinds of waveform electro-acupuncture, three kinds of waveform electro-acupuncture and four waveform electro-acupuncture.
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