Electronic Measuring Acupoint Therapy: Traditional Chinese Circuit Des

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Electronic measuring acupoint therapy instrumentThis is a multi-purpose electroacupuncture instrument that can be used for acupoint exploration, acupuncture treatment, acupuncture anesthesia, body surface acupoint stimulation, and meridian sensing (explicit and recessive) measurement. Its circuit structure is compact and easy to use, and it can meet a variety of clinical and scientific research requirements.Figure 8-1 and Figure 8-2 are circuit diagrams of the measurement therapy device. A voltage-controlled intermittent oscillator is composed of VT6, VT7 and T2 to generate pulses. The discharge capacitor C7 is switched by S2b to realize coarse adjustment of the oscillation frequency and at the same time changing the pulse width, two frequency ranges of 0~100Hz and 0~1000Hz can be obtained. RP1 and RP2 are used for fine frequency adjustment. The pulse frequency is proportional to the base potential of VT6, which is controlled by diodes VD6 and VD7. The high point of the sliding point potential of RP1 and RP2 is always selected. This feature is used to form an ingenious waveform and frequency adjustment circuit. If RP2 (variable frequency f2) is set to zero and RP1 (fixed frequency f1) is adjusted separately, continuous waves of different frequencies can be obtained. If RP1(f1) is set to 0 and RP2(f2) is adjusted separately, because the voltage waveform on RP2 is the square wave output by the multivibrator (VT4, VT5), the base potential of VT6 also fluctuates according to the square wave. When the potential is low, VT6 is cut off and the oscillator stops; when the potential is high, it oscillates at the frequency adjusted by RP2 to obtain intermittent waves of different frequencies. If RP2 and RP1 are adjusted at the same time (but the f1 indicated by RP1 must be smaller than the f2 indicated by RP2), a dense wave of f1 and f2 operating alternately at low and high frequencies will be obtained. It can be seen that with only two adjustable potentiometers, three waveforms combined at any frequency (within a certain range) can be obtained. When in use, the frequency value is indicated by the knob scale, and very low frequencies can be monitored by the flashing neon bulb.The positive pulse output by VT7 is inverted and current amplified by the drive circuit (VT8, VT9), and then sent to the base of the three output tubes VT12, VT15, and VT18. After amplification, each output is boosted and output by the transformer. The drive circuit isolates the output circuit from the oscillator, so the pulse waveform and frequency are very stable and are not affected by the output load. When you need to increase the number of output channels, you only need to continue parallel connection after VT9 (can be increased to more than 10 channels).Generally, electroacupuncture instruments use a voltage divider method at the output end to adjust the intensity. This method has serious non-linearity when adjusting, is inconvenient to use, and will interfere with each other when shared by multiple channels. This machine adopts the method of adjusting the working voltage of the output tube to realize intensity adjustment, which completely overcomes the above shortcomings. Taking the first output as an example, the operating voltage value of VT12 is determined by the base voltage of VT10 in the emitter follower of the composite tube (VT10, VT11). The size of its voltage directly controls the size of the output pulse amplitude. The voltage adjustment is divided into two steps: coarse and fine. S3 coarsely adjusts the voltage to high and low levels. It controls each output simultaneously. Fine tuning is done by RP4, but it can only control this output. The advantages of this circuit are that it has good adjustment linearity, low and constant output impedance (about 100Ω), each channel does not interfere with each other, and the channel with an output of 0 does not consume power. Each channel can be connected in series to increase the output voltage for stimulating acupoints on the body surface, or in parallel (with the same phase) to increase the output current for long-needle and strong-tolerance recipients. The working voltage can be adjusted as much as the intensity is needed. There is no voltage division loss, which is extremely power-saving.For the output circuit of this circuit, when the front stage is working normally and the output terminal is connected to a 250Ω false load, the output intensity should change linearly with the adjustment of RP4, and should be 0 at the minimum. If C9 fails, the regulation becomes non-linear. If the current flowing through VT10 or VT11 is too large, the intensity cannot be adjusted to 0. If the tube breaks down, the strength is always at the maximum and cannot be adjusted. If these two faults exist, it will suddenly cause unbearable stimulation to the patient when starting up.When in use, set all knobs to "0", insert needles, wire connections, adjust the waveform and frequency, and gradually increase the intensity until required. When used to stimulate acupuncture points on the body surface, if the intensity of a single channel is insufficient, it can be output by XJ2, turn S4 to the "1+2+3" side, so that the three channels are connected in series, and the intensity is adjusted jointly by the three channels.Under normal circumstances, after the acupoints are detected, the acupoint pen is used for treatment. At this time, S4 can be moved from the original "exploring hole" side to the "1+2+3" side.Determination of explicit and implicit sensory transmission in meridians: Select continuous waves of 3 to 5 Hz. On the two output lines, one is connected to a 20×40mm irrelevant electrode, padded with saline gauze, and tied to the lower limbs; the other is connected to a lead (copper, silver) piece with a diameter of about 6mm, padded with saline absorbent cotton, and lightly tied (or pressed) on the acupoints. Gradually increase the output intensity until sufficient stimulation is achieved. Those who are sensitive to the meridian with obvious sensory transmission will have sensations along the meridians; most non-sensitive people will have special sensory phenomena when they lightly tap the acupoints on the meridian with a small rubber mallet. This is a meridian phenomenon currently being studied.(Liu Yiming) alt="9.jpg (58949 bytes)">Figure 8-1 …

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